Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska

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What does this data set describe?

Title:
Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska
Abstract:
This geologic map and report depicts portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles. The Livengood area is a historically productive placer mining area approximately 80 road miles north of Fairbanks, Alaska. This report synthesizes recently collected and previously published agency and industry geologic data in a 1:50,000-scale comprehensive geologic map to build a better understanding of the geology and mineral-resource potential of the Livengood area. It expands and updates the Alaska Division of Geological & Geophysical Surveys (DGGS) Preliminary Interpretive Report (PIR) 2004-3 with the addition of new DGGS mapping and drillhole data from ITH, and integrates previously published DGGS surficial geology from Report of Investigation (RI) 84-6, and RI 2013-2.
Supplemental_Information:
This digital data distribution package provides ESRI ArcGIS .mxd file, geodatabase, and shapefiles that portray features presented in RI 2016-5. Field names and values are organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP). This metadata file lists the table names and field names used in the geodatabase. Table and field names in the shapefiles are truncated at 10 characters. The geodatabase and selected shapefiles provide the following features:
border:    A polygon that encompasses the maximum geographic extent of the data observations.
CorrelationOfMapUnits:    Geodatabase feature dataset that depicts the map unit correlation chart; includes applicable unit designators, brackets, dividing lines, and text, NCGMP09 format
CrossSection:    Geodatabase feature datasets of geologic cross sections; includes applicable unit designators, brackets, dividing lines, and text, NCGMP09 format.
CartographicLines:    Cross section transects, NCGMP09 format.
ContactsAndFaults:    Line features and annotation depicting faults and geologic contacts, NCGMP09 format.
CoveredUnitLabelsAnno:    Annotation labels for covered map units.
DataSourcePolys:    Polygons that delineate the data sources for various parts of the map, NCGMP09 format.
DikePoints:    Dike location points, NCGMP09 format.
FossilPoints:    Fossil location points, NCGMP09 format.
GeochronPoints:    Geochronology sample location points, NCGMP09 format.
GeologicLines:    Dikes, coal seams, ash beds, glacial features, anticline and syncline hinge-surface traces, and other kinds of key beds that do not participate in map-unit topology, NCGMP09 format.
MapUnitPolys:    Polygons and associated annotations that record the distribution of mapped or interpreted geologic units, NCGMP09 format.
OrientationPoints:    A point file that provides field station locations, symbology, and associated structure data (bedding attitudes, foliation attitudes, slip vectors measured at a point, etc.), NCGMP09 format.
Stations:    A point file that provides location information, observations, and other data specific to each field observation station, NCGMP09 format.
  1. How should this data set be cited?

    Twelker, Evan, Athey, J.E., Newberry, R.J., Griesel, G.A., Szumigala, D.J., Freeman, L.K., Elliott, B.A., Werdon, M.B., and Stevens, D.S.P., 2016, Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska: Report of Investigation RI 2016-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 39 p., 1 sheet, scale 1:63,360.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -149.016142
    East_Bounding_Coordinate: -148.214073
    North_Bounding_Coordinate: 65.630106
    South_Bounding_Coordinate: 65.322677

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 2001
    Ending_Date: 2016
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: report and digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a vector data set.

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -147
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000.000000
      False_Northing: 0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest .00000001
      Ordinates (y-coordinates) are specified to the nearest .00000001
      Planar coordinates are specified in Meters

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.9786982.

  7. How does the data set describe geographic features?

    border
    A polygon that encompasses the maximum geographic extent of the data observations. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    CorrelationOfMapUnits
    Geodatabase feature dataset that depicts the map unit correlation chart; includes applicable unit designators, brackets, dividing lines, and text, NCGMP09 format (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    CrossSectionA, CrossSectionB, CrossSectionC, CrossSectionD
    Geodatabase feature datasets of geologic cross sections; includes applicable unit designators, brackets, dividing lines, and text, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    CartographicLines, CartographicLinesAnno
    Cross section transects, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    ContactsAndFaults, ContactsAndFaultsAnno, ContactsAndFaultsEndAnno
    Line features and annotation depicting faults and geologic contacts, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): contact, surficial

    IsConcealed
    This is a flag to identify contacts and faults covered by overlying map units. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    YThe feature IS covered by an overlying map unit.
    NThe feature IS NOT covered by an overlying map unit.

    ExistenceConfidence
    Indicates the degree of confidence and/or certainty in the interpretation of a a feature's existence. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
    questionableThe interpretation of the feature at the mapped scale fits the overall proposed geologic model but the extent and/or classification is questionable or uncertain due to insufficient observations and/or supporting data.

    IdentityConfidence
    Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
    questionableThe interpretation of the feature at the mapped scale fits the overall proposed geologic model but the extent and/or classification is questionable or uncertain due to insufficient observations and/or supporting data.

    LocationConfidenceMeters
    Half-width in meters of positional uncertainty envelope; position is relative to other features in the data. A value of -9 indicates that this measure is not available. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    Label
    The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDCGeoAge font
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    Notes
    Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

    The notes indicate the source of the feature interpretation or provide more information about the feature.

    RuleID
    References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    CoveredUnitLabelsAnno
    Annotation labels for covered map units. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    DataSourcePolys
    Polygons that delineate the data sources for various parts of the map, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    DikePoints
    Dike location points, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): dike contact and dike

    StationID
    Identifier assigned by person who originally located station (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLA station number was not recorded or was not assigned.

    Generic example of a DGGS station identifier: YYYYAAA9999X; YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database. Stations observed by non-DGGS personnel use identifiers from the originating reference.

    MapUnit
    Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLBlank (NULL) field values indicate that a map unit value was not assigned.
    KiFelsic to intermediate dikes and sills
    KmkMoney Knob intrusive suite
    KscShorty Creek intrusive suite

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    PlotAtScale
    The scale at which the observation should be plotted. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:50000

    Azimuth
    Strike or trend, measured in degrees clockwise from geographic North, using right-hand rule (dip is to right of azimuth direction). Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:340
    Units:degrees

    Inclination
    Dip or plunge, measured in degrees down from horizontal. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:80
    Units:degrees

    IdentityConfidence
    Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.

    OrientationConfidenceDegrees
    Estimated circular error, in degrees. For planar features, error in orientation of pole to plane. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:5
    Units:degrees

    Notes
    Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

    The notes indicate the source of the feature interpretation or provide more information about the feature.

    RuleID
    References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    FossilPoints, FossilPointsAnno
    Fossil location points, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): Radiolarians

    MapUnit
    Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    CwlWickersham limestone
    DcCascaden Ridge sandstone, shale, and conglomerate
    OldLivengood Dome chert
    SlLost Creek limestone
    lPzZdAmy Creek dolostone, siliceous dolostone, and limestone
    lPzZmcAmy Creek siliceous mudstone and chert

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    Label
    The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDCGeoAge font
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    FieldSampleID
    Identifier assigned by person who originally located the sample (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLA sample number was not recorded or was not assigned.

    Generic example of a DGGS sample identifier: YYYYAAA9999X; YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database. Stations observed by non-DGGS personnel use identifiers from the originating reference.

    PlotAtScale
    The scale at which the observation should be plotted. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:50000
    Maximum:50000

    RuleID
    References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    GeochronPoints, GeochronPointsAnno
    Geochronology sample location points, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): U-Pb

    MapUnit
    Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    CgsGreenstone
    CmgMetagabbro
    KmkMoney Knob intrusive suite
    KscShorty Creek intrusive suite
    lPzZmbAmy Creek metabasalt
    lPzZmcAmy Creek siliceous mudstone and chert

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    Label
    The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDCGeoAge font
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    FieldSampleID
    Identifier assigned by person who originally located the sample (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLA sample number was not recorded or was not assigned.

    Generic example of a DGGS sample identifier: YYYYAAA9999X; YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database. Stations observed by non-DGGS personnel use identifiers from the originating reference.

    MaterialAnalyzed
    Type of material used for analysis. (Source: Alaska Division of Geological & Geophysical Surveys)

    Material type(s): zircon

    PlotAtScale
    The scale at which the observation should be plotted. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:50000
    Maximum:50000

    Age
    The interpreted (preferred) age calculated from geochronological analysis. Note: units provided in AgeUnits field. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:57
    Maximum:566

    AgePlusError
    The upper age error calculated from geochronological analysis. Note: units provided in AgeUnits field. (Source: Alaska Division of Geological & Geophysical Surveys or originating reference)

    Range of values
    Minimum:0
    Maximum:16

    AgeMinusError
    The lower age error calculated from geochronological analysis. Note: units provided in AgeUnits field. (Source: Alaska Division of Geological & Geophysical Surveys or originating reference)

    Range of values
    Minimum:0
    Maximum:16

    AgeUnits
    Units of the geochronology analysis. (Source: Alaska Division of Geological & Geophysical Surveys or originating reference)

    Units(s): Ma

    Notes
    Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

    The notes indicate the source of the feature interpretation or provide more information about the feature.

    RuleID
    References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    GeologicLines
    Dikes, coal seams, ash beds, glacial features, anticline and syncline hinge-surface traces, and other kinds of key beds that do not participate in map-unit topology, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): overturned antiform

    IsConcealed
    This is a flag to identify contacts and faults covered by overlying map units. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    YThe feature IS covered by an overlying map unit.

    ExistenceConfidence
    Indicates the degree of confidence and/or certainty in the interpretation of a a feature's existence. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    questionableThe interpretation of the feature at the mapped scale fits the overall proposed geologic model but the extent and/or classification is questionable or uncertain due to insufficient observations and/or supporting data.
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.

    IdentityConfidence
    Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    questionableThe interpretation of the feature at the mapped scale fits the overall proposed geologic model but the extent and/or classification is questionable or uncertain due to insufficient observations and/or supporting data.
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    RuleID
    References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    MapUnitPolys, MapUnitPolysAnno
    Polygons and associated annotations that record the distribution of mapped or interpreted geologic units, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS)This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    MapUnit
    Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    CZwaWickersham shale
    CgsGreenstone
    CmgMetagabbro
    CmksMudstone and chert
    CsSerpentinite, metagabbro, and greenstone
    CwlWickersham limestone
    DcCascaden Ridge sandstone, shale, and conglomerate
    DclCascaden Ridge shale to fine sandstone
    DcuCascaden Ridge sandstone, siltstone, and conglomerate
    DcvCascaden Ridge peralkaline rhyolite flows, breccia, and lithic tuff
    DiOlive Creek pluton
    KcrpCascaden Ridge pluton
    KiFelsic to intermediate dikes and sills
    KmkMoney Knob intrusive suite
    KscShorty Creek intrusive suite
    KwccWilber Creek conglomerate
    KwcfWilber Creek flysch
    KwcsWilber Creek shale and siltstone
    OldLivengood Dome chert
    PDsShale
    QTfbBench alluvium
    QaUndifferentiated alluvium
    QafAlluvial fan deposits
    QatTerrace alluvium
    QcfMixed colluvium and alluvium
    QclLandslide deposits
    QerRetransported silt and lowland loess
    QhPlacer tailings and artificial fills
    QsSwamp deposit
    QsuUpland silt and colluvium
    SlLost Creek limestone
    SsLost Creek sandstone, siltstone, shale, and conglomerate
    TrDsSandstone, shale, and chert
    TrgRampart gabbro, quartz gabbro, and minor chert
    lPzZdAmy Creek dolostone, siliceous dolostone, and limestone
    lPzZmbAmy Creek metabasalt
    lPzZmcAmy Creek siliceous mudstone and chert

    IdentityConfidence
    Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    unspecifiedThe author has not specified a level of confidence or certainty in the interpretation of the feature.

    Label
    The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDCGeoAge font
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    Symbol
    References the CMYK color value that was assigned to the map unit. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    2260CMYK value - C:20%, M:20%, Y:60%, K:0%
    1240CMYK value - C:13%, M:20%, Y:40%, K:0%
    0030CMYK value - C:0%, M:0%, Y:30%, K:0%
    0050CMYK value - C:0%, M:0%, Y:50%, K:0%
    0070CMYK value - C:0%, M:0%, Y:70%, K:0%
    0A40CMYK value - C:0%, M:8%, Y:40%, K:0%
    0260CMYK value - C:0%, M:20%, Y:60%, K:0%
    2350CMYK value - C:20%, M:30%, Y:50%, K:0%
    0A70CMYK value - C:0%, M:8%, Y:70%, K:0%
    4450CMYK value - C:40%, M:40%, Y:50%, K:0%
    5370CMYK value - C:50%, M:30%, Y:70%, K:0%
    2040CMYK value - C:20%, M:0%, Y:40%, K:0%
    1X00CMYK value - C:13%, M:100%, Y:0%, K:0%
    3A60CMYK value - C:30%, M:8%, Y:60%, K:0%
    07X0CMYK value - C:0%, M:70%, Y:100%, K:0%
    5530CMYK value - C:50%, M:50%, Y:30%, K:0%
    4310CMYK value - C:40%, M:30%, Y:13%, K:0%
    2430CMYK value - C:20%, M:40%, Y:30%, K:0%
    2640CMYK value - C:20%, M:60%, Y:40%, K:0%
    A700CMYK value - C:8%, M:70%, Y:0%, K:0%
    4710CMYK value - C:40%, M:70%, Y:13%, K:0%
    3750CMYK value - C:30%, M:70%, Y:50%, K:0%
    6X20CMYK value - C:60%, M:100%, Y:20%, K:0%
    45A0CMYK value - C:40%, M:50%, Y:8%, K:0%
    32A0CMYK value - C:30%, M:20%, Y:8%, K:0%
    12A0CMYK value - C:13%, M:20%, Y:8%, K:0%
    3XX0CMYK value - C:30%, M:100%, Y:100%, K:0%
    3430CMYK value - C:30%, M:40%, Y:30%, K:0%
    6420CMYK value - C:60%, M:40%, Y:20%, K:0%
    0110CMYK value - C:0%, M:13%, Y:13%, K:0%
    2400CMYK value - C:20%, M:40%, Y:0%, K:0%
    4600CMYK value - C:40%, M:60%, Y:0%, K:0%
    1570CMYK value - C:13%, M:50%, Y:70%, K:0%
    A770CMYK value - C:8%, M:70%, Y:70%, K:0%
    4A00CMYK value - C:40%, M:8%, Y:0%, K:0%
    3010CMYK value - C:30%, M:0%, Y:13%, K:0%
    6A30CMYK value - C:60%, M:8%, Y:30%, K:0%

    RuleID
    References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    OrientationPoints, OrientationPointsAnno
    A point file that provides field station locations, symbology, and associated structure data (bedding attitudes, foliation attitudes, slip vectors measured at a point, etc.), NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS)This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): axial plane

    StationID
    Identifier assigned by person who originally located station (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLA station number was not recorded or was not assigned.

    Generic example of a DGGS station identifier: YYYYAAA9999X; YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database. Stations observed by non-DGGS personnel use identifiers from the originating reference.

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLnot applicable

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    PlotAtScale
    The scale at which the observation should be plotted. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:50000

    Azimuth
    Strike or trend, measured in degrees clockwise from geographic North, using right-hand rule (dip is to right of azimuth direction). Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:358
    Units:degrees

    Inclination
    Dip or plunge, measured in degrees down from horizontal. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:90
    Units:degrees

    IdentityConfidence
    Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.

    OrientationConfidenceDegrees
    Estimated circular error, in degrees. For planar features, error in orientation of pole to plane. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:5
    Maximum:5
    Units:degrees

    RuleID
    References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    Stations
    A point file that provides location information, observations, and other data specific to each field observation station, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    FieldID
    Identifier assigned by person who originally located station (Source: Alaska Division of Geological & Geophysical Surveys)

    Generic example of a sample identifier: YYYYAAA9999X; YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database.

    MapUnit
    Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLBlank (NULL) field values indicate that a map unit value was not assigned.
    CmgMetagabbro
    CmksMudstone and chert
    CsSerpentinite, metagabbro, and greenstone
    DclCascaden Ridge shale to fine sandstone
    DcuCascaden Ridge sandstone, siltstone, and conglomerate
    DcvCascaden Ridge peralkaline rhyolite flows, breccia, and lithic tuff
    OldLivengood Dome chert
    lPzZdAmy Creek dolostone, siliceous dolostone, and limestone
    lPzZmbAmy Creek metabasalt
    lPzZmcAmy Creek siliceous mudstone and chert

    LocationConfidenceMeters
    Half-width in meters of positional uncertainty envelope; position is relative to other features in the data. A value of -9 indicates that this measure is not available. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:10
    Maximum:10
    Units:meters

    LocationMethod
    Term that categorizes technique used to determine station location (Source: Alaska Division of Geological & Geophysical Surveys)

    Location method(s): Handheld GPS and Unknown

    Observer
    Name of the person who located station (Source: Alaska Division of Geological & Geophysical Surveys)

    Observer(s): ITH drillhole

    Notes
    Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

    The notes indicate the source of the feature interpretation or provide more information about the feature.


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    This project is part of the Alaska Airborne Geophysical/Geological Mineral Inventory Program funded by the Alaska State Legislature and managed by State of Alaska, Department of Natural Resources (DNR), Division of Geological & Geophysical Surveys (DGGS). Partial funding for the 2003 geologic mapping was also provided by the U.S. Geological Survey, National Cooperative Geologic Mapping Program, under STATEMAP award number 03HQAG0055. The accompanying report provides additional acknowledgements to a multitude of people for their various contributions to this map.

  3. To whom should users address questions about the data?

    Alaska Division of Geological & Geophysical Surveys
    GIS Manager
    3354 College Rd
    Fairbanks, AK 99709-3707
    USA

    907-451-5020 (voice)
    dggsgis@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays


Why was the data set created?

This geologic map and report depicts portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles. This report synthesizes recently collected and previously published agency and industry geologic data in a 1:50,000-scale comprehensive geologic map to build a better understanding of the geology and mineral-resource potential of the Livengood area. It expands and updates the Alaska Division of Geological & Geophysical Surveys (DGGS) Preliminary Interpretive Report (PIR) 2004-3 with the addition of new DGGS mapping and drillhole data from ITH, and integrates previously published DGGS surficial geology from Report of Investigation (RI) 84-6, and RI 2013-2.


How was the data set created?

  1. From what previous works were the data drawn?

    Albanese, M.D., 1983 (source 1 of 6)
    Albanese, M.D., 1983, Bedrock geologic map of the Livengood B-4 Quadrangle, east-central Alaska: Report of Investigation RI 83-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:40,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 40000
    Source_Contribution: Bedrock geologic unit interpretation

    Athey, J.E. and Craw, P.A., 2004 (source 2 of 6)
    Athey, J.E., and Craw, P.A., 2004, Geologic maps of the Livengood SW C-3 and SE C-4 quadrangles, Tolovana mining district, Alaska: Preliminary Interpretive Report PIR 2004-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 24 p
    Type_of_Source_Media: paper
    Source_Contribution: Bedrock geologic unit interpretation

    Bundtzen, T.K., 1983 (source 3 of 6)
    Bundtzen, T.K., 1983, Bedrock geologic outcrop map of the Livengood B-3 Quadrangle, Alaska: Report of Investigation RI 83-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:40,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 40000
    Source_Contribution: Bedrock geologic unit interpretation

    Burns, L.E. and others, 2015 (source 4 of 6)
    Burns, L.E., Geoterrex-Dighem, Stevens Exploration Management Corp., Emond, A.M., and Graham, G.R.C., 2015, Livengood mining district electromagnetic and magnetic airborne geophysical survey, data compilation: Geophysical Report GPR 2015-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Type_of_Source_Media: digital data
    Source_Contribution: Bedrock geologic unit interpretation

    Robinson, M.S., 1983 (source 5 of 6)
    Robinson, M.S., 1983, Bedrock geologic map of the Livengood C-4 Quadrangle, east-central Alaska: Report of Investigation RI 83-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:40,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 40000
    Source_Contribution: Bedrock geologic unit interpretation

    Smith, T.E., 1983 (source 6 of 6)
    Smith, T.E., 1983, Bedrock geologic map of the Livengood C-3 Quadrangle, east-central Alaska: Report of Investigation RI 83-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:40,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 40000
    Source_Contribution: Bedrock geologic unit interpretation

  2. How were the data generated, processed, and modified?

    Date: 2010 (process 1 of 4)
    Bedrock geologic unit interpretation - This geologic map and report draws on work completed by DGGS in 1982, 2003, and 2010, as well as work by ITH. DGGS mapping in 2003 focused on the Livengood southeast C-4 and southwest C-3 quadrangles and was published as PIR 2004-3 and RI 2013-2. The 2003 project included approximately 90 person-days of fieldwork, and the 2010 DGGS program consisted of approximately 100 person-days of bedrock geologic mapping fieldwork spent mainly in the north half of the Livengood B-4 and the northwest B-3 quadrangles. Together, the 2003 and 2010 programs combine for 2,444 handheld-GPS-located geologic mapping stations. Outcrop map data from the 1982 DGGS field projects (Albanese, 1983 [RI 83-3]; Robinson, 1983 [RI 83-4]; Smith, 1983 [RI 83-5]; Bundtzen, 1983 [RI 83-6]) were also incorporated in field planning and final geologic interpretation. Mapping was supplemented with geochemistry, airborne geophysical survey data, radiometric and fossil dates, and magnetic susceptibility measurements.

    Data sources used in this process:

    • Albanese, M.D., 1983
    • Athey, J.E. and Craw, P.A., 2004
    • Bundtzen, T.K., 1983
    • Burns, L.E. and others, 2015
    • Robinson, M.S., 1983
    • Smith, T.E., 1983

    Date: 2015 (process 2 of 4)
    Surficial geologic unit interpretation - Surficial deposits in Livengood C-3 and C-4 quadrangles were mapped by interpreting 1:63,360-scale, false-color infrared aerial photographs taken in August 1978 and August 1986, and verified during five days of field checking in 2003 and two days in 2011. Tailings were mapped in the western Livengood Creek area using 1:6,000-scale aerial photographs taken in 2001. Preliminary mapping was carried out by Patty Burns and subsequently revised and finalized by Richard Reger.

    Date: 2015 (process 3 of 4)
    GIS analysis and digital cartography - The geologic and geographic features portrayed in this data distribution package were attributed according to the NCGMP09 geodatabase standard.

    Date: 2016 (process 4 of 4)
    Technical review - This DGGS Report of Investigations is a final report of scientific research. It has received technical review and editing by several scientists familiar with the subject matter. We incorporated the reviewers' suggestions into the final draft when deemed appropriate.

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Certainty in attribute interpretation varies throughout the map. Data fields within each table record the author's degree of confidence in the existence or identity of applicable features. This publication is a final report of research and has received two technical reviews as well as technical editing.

  2. How accurate are the geographic locations?

    Certainty in feature boundaries or location varies throughout the map. Data fields within each table record the author's degree of confidence in the location of applicable features.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    This data release is complete.

  5. How consistent are the relationships among the observations, including topology?

    Polygon topology is present and clean on the original geospatial dataset. All polygon features were topologically validated using ArcGIS prior to export to shapefile format.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Use_Constraints:
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

  1. Who distributes the data set? (Distributor 1 of 1)

    Alaska Division of Geological & Geophysical Surveys
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (<http://www.dggs.alaska.gov>) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
  2. What's the catalog number I need to order this data set?

    RI 2016-5

  3. What legal disclaimers am I supposed to read?

    The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 30-Nov-2016
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.21 on Wed Nov 30 10:35:22 2016