Identification_Information:
  Citation:
    Citation_Information:
      Originator: Benowitz, J.A.
      Originator: Layer, P.W.
      Originator: Wypych, Alicja
      Originator: Twelker, Evan
      Publication_Date: 2017
      Title: 40Ar/39Ar data from rocks collected in the 2015 Wrangellia mineral assessment project area, Mount Hayes A-5, Mount Hayes B-6, and Talkeetna Mountains D-2 quadrangles, Alaska
      Geospatial_Data_Presentation_Form: report digital data
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2017-1
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 9 p.
      Online_Linkage: http://doi.org/10.14509/29699
  Description:
    Abstract: This report presents 40Ar/39Ar step-heating geochronology results for igneous and metamorphic rocks from the Alaska Division of Geological & Geophysical Surveys' (DGGS) Wrangellia Mineral Assessment project, part of a multi-year effort focusing on improving the publicly available geoscientific information for the western Wrangellia terrane. The samples described in this report were selected and analyzed to improve our understanding of the geology and structural history of the Wrangellia Mineral Assessment project area. A metagabbro rock sample returned a Late Triassic crystallization age consistent with regional ages for Nikolai Greenstone-related magmatism; however, the two amphibole separates ages do not overlap, and have larger errors than expected due to alteration. An Early Cretaceous age obtained on a syenogranite pluton could correspond to similar ages of an Early Cretaceous porphyry event within the Grubstake Cu-Au porphyry system, Slana Region. Finally, we obtained Oligocene ages for a dacitic dike and a schist; the schist age constrains the timing of displacement on a thrust fault in the area. Analyses were performed by the University of Alaska Fairbanks (UAF) Geochronology Laboratory, and results were reported by Jeff Benowitz and Paul Layer. Products included in this data release are a summary of sample collection methods, the laboratory report, analytical data tables and associated metadata, and plots of the 40Ar/39Ar age spectra and Ca/K and Cl/K ratios.
    Purpose: The DGGS Mineral Resources section carried out geologic mapping and sampling in the eastern Denali Highway region between Watana Creek and Paxson from July 29 through August 7, 2015. The project focused on characterization of a broad section of Wrangellia stratigraphy, including Late Triassic rocks of the Ni-Cu-Co-PGE- and Cu-Ag-mineralized Wrangellia large igneous province, as well as modern geochemical characterizations of skarn-, vein-, and basalt-hosted Cu mineralization. The samples described in this report were selected and analyzed to improve our understanding of the geology and structural history of the Wrangellia Mineral Assessment project area.
    Supplemental_Information:
      >summary-data-locations: Identification numbers, coordinates, sample descriptions, and summary ages of each sample
      >step-heating-data: Power output levels and resultant measurements from each sample run
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 2015
        Ending_Date: 2017
    Currentness_Reference: ground condition
  Status:
    Progress: complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -147.715591
      East_Bounding_Coordinate: -146.014124
      North_Bounding_Coordinate: 63.319838
      South_Bounding_Coordinate: 62.850927
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: geoscientificInformation
    Theme:
      Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys
      Theme_Keyword: 40Ar/39Ar
      Theme_Keyword: Analyses
      Theme_Keyword: Analyses and Sampling
      Theme_Keyword: Analytical Lab Results
      Theme_Keyword: Analytical Results
      Theme_Keyword: Ar-Ar
      Theme_Keyword: Basalt
      Theme_Keyword: Bedrock
      Theme_Keyword: Bedrock Geology
      Theme_Keyword: Copper
      Theme_Keyword: Crystals
      Theme_Keyword: Geochronology
      Theme_Keyword: Geologic
      Theme_Keyword: Geology
      Theme_Keyword: Greenstone
      Theme_Keyword: Hornblende
      Theme_Keyword: Igneous
      Theme_Keyword: Igneous Rocks
      Theme_Keyword: Interpretation
      Theme_Keyword: Lab Methods
      Theme_Keyword: Methods
      Theme_Keyword: Mica
      Theme_Keyword: Mineral Composition
      Theme_Keyword: Mineralogy
      Theme_Keyword: Mineral Resources
      Theme_Keyword: Minerals
      Theme_Keyword: Muscovite
      Theme_Keyword: Plutonic Rocks
      Theme_Keyword: Porphyry
      Theme_Keyword: Resources
      Theme_Keyword: Rocks
      Theme_Keyword: Sample Location
      Theme_Keyword: Strategic and Critical Minerals Assessment Project
      Theme_Keyword: Strategic Minerals
      Theme_Keyword: Stratigraphy
      Theme_Keyword: Structural Geology
      Theme_Keyword: Thrust
      Theme_Keyword: Volcanic Rocks
    Place:
      Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys
      Place_Keyword: Hayes
      Place_Keyword: Mount Hayes Quadrangle
      Place_Keyword: Talkeetna
      Place_Keyword: Talkeetna Mountains
      Place_Keyword: Talkeetna Mountains Quadrangle
    Stratum:
      Stratum_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys
      Stratum_Keyword: Nikolai Greenstone
      Stratum_Keyword: Wrangellia Terrane
    Temporal:
      Temporal_Keyword_Thesaurus: Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America
      Temporal_Keyword: Cretaceous
      Temporal_Keyword: Oligocene
      Temporal_Keyword: Triassic
  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.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Alaska Division of Geological & Geophysical Surveys
      Contact_Position: Metadata Manager
      Contact_Address:
        Address_Type: mailing and physical
        Address: 3354 College Road
        City: Fairbanks
        State_or_Province: AK
        Postal_Code: 99709-3707
        Country: USA
      Contact_Voice_Telephone: (907)451-5039
      Contact_Facsimile_Telephone: (907)451-5050
      Contact_Electronic_Mail_Address: dggspubs@alaska.gov
      Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
  Data_Set_Credit: This project was funded by Capital Improvement Project funds through the State's Strategic and Critical Minerals Assessment project, a component of the Alaska Airborne Geophysical/Geological Mineral Inventory Program funded by the Alaska State Legislature and managed by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Hubbard, T.D.
      Originator: Wypych, Alicja
      Originator: Sicard, K.R.
      Originator: Newberry, R.J.
      Originator: Reioux, D.A.
      Originator: Freeman, L.K.
      Originator: Lande, L.L.
      Publication_Date: 2015
      Title: Geologic map of the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska
      Series_Information:
        Series_Name: Preliminary Interpretive Report
        Issue_Identification: PIR 2015-6
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 16 p., 1 sheet, scale 1:50,000
      Online_Linkage: http://doi.org/10.14509/29470
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Newberry, R.J.
      Originator: Freeman, L.K.
      Originator: Sicard, K.R.
      Originator: Reioux, D.A.
      Originator: Bachmann, E.N.
      Publication_Date: 2013
      Title: DGGS geologic and mineral-resource assessment of the western Wrangellia terrane, central Alaska: Initial progress report (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 4-10, 2013
      Series_Information:
        Series_Name: Poster and Presentation
        Issue_Identification: Twelker, Evan and others, 2013
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 25 p
      Online_Linkage: http://doi.org/10.14509/26821
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Burns, L.E.
      Publication_Date: 2014
      Title: New geochemical and geophysical data from the western Wrangellia minerals assessment area (presentation): Alaska Miners Association 24th Biennial Mining Conference, Fairbanks, Alaska April 7-13, 2014
      Series_Information:
        Series_Name: Poster and Presentation
        Issue_Identification: Twelker, Evan and Burns, L.E., 2014
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 34 p
      Online_Linkage: http://doi.org/10.14509/27284
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Wypych, Alicja
      Originator: Newberry, R.J.
      Publication_Date: 2014
      Title: New data and insight on the Late Triassic Wrangellia magmatic Ni-Cu-Co-PGE system in the Talkeetna Mountains, central Alaska (poster): Society of Economic Geologists 2014 Conference, September 27-30, 2014
      Series_Information:
        Series_Name: Poster and Presentation
        Issue_Identification: Twelker, Evan and others, 2014
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 1 sheet
      Online_Linkage: http://doi.org/10.14509/29139
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Wypych, Alicja
      Originator: Sicard, K.R.
      Originator: Newberry, R.J.
      Originator: Freeman, L.K.
      Originator: Reioux, D.A.
      Originator: Lande, Lauren
      Publication_Date: 2014
      Title: Preliminary results from 2014 geologic mapping in the Talkeetna Mountains, Alaska (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 3-9, 2014
      Series_Information:
        Series_Name: Poster and Presentation
        Issue_Identification: Twelker, Evan and others, 2014
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 28 p
      Online_Linkage: http://doi.org/10.14509/29160
  Cross_Reference:
    Citation_Information:
      Originator: Lande, Lauren
      Originator: Newberry, R.J.
      Originator: Twelker, Evan
      Publication_Date: 2015
      Title: A petrological model for emplacement of the ultramafic Ni-Cu-PGE Alpha complex, Eastern Interior, Alaska (poster): Geological Society of America Cordilleran Section - 111th Annual Meeting, Anchorage, Alaska, May 11-13, 2015
      Series_Information:
        Series_Name: Poster and Presentation
        Issue_Identification: Lande, Lauren and others, 2015
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 1 sheet
      Online_Linkage: http://doi.org/10.14509/29480
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Lande, Lauren
      Publication_Date: 2015
      Title: DGGS geological investigations in western Wrangellia (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 1-5, 2015
      Series_Information:
        Series_Name: Poster and Presentation
        Issue_Identification: Twelker, Evan and Lande, Lauren, 2015
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 45 p
      Online_Linkage: http://doi.org/10.14509/29531
  Cross_Reference:
    Citation_Information:
      Originator: Wypych, Alicja
      Originator: Twelker, Evan
      Originator: Lande, L.L.
      Originator: Newberry, R.J.
      Publication_Date: 2015
      Title: Along-strike geochemical variations in the Late Triassic Nikolai magmatic system, Wrangellia, central Alaska (poster number V31D-3059): American Geophysical Union 2015 Fall Meeting, December 14-18, 2015
      Series_Information:
        Series_Name: Poster and Presentation
        Issue_Identification: Wypych, Alicja and others, 2015
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 1 sheet
      Online_Linkage: http://doi.org/10.14509/29567
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Bachmann, E.N.
      Originator: Freeman, L.K.
      Originator: Newberry, R.J.
      Originator: Reioux, D.A.
      Originator: Sicard, K.R.
      Originator: Tuzzolino, A.L.
      Originator: Wright, T.C.
      Originator: Wypych, Alicja
      Publication_Date: 2014
      Title: Major-oxide, minor-oxide, and trace-element geochemical data from rocks and stream sediments in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2014-3
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 6 p
      Online_Linkage: http://doi.org/10.14509/27181
  Cross_Reference:
    Citation_Information:
      Originator: Benowitz, J.A.
      Originator: Layer, P.W.
      Originator: Twelker, Evan
      Publication_Date: 2014
      Title: 40Ar/39Ar data from rocks collected in 2013 in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2014-18
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 10 p
      Online_Linkage: http://doi.org/10.14509/29119
  Cross_Reference:
    Citation_Information:
      Originator: Wypych, Alicja
      Originator: Twelker, Evan
      Originator: Freeman, L.K.
      Originator: Lande, Lauren
      Originator: Newberry, R.J.
      Originator: Reioux, D.A.
      Originator: Sicard, K.R.
      Publication_Date: 2014
      Title: Major-oxide and trace-element geochemical data from rocks collected in 2014 in the Wrangellia mineral assessment area, Talkeetna Mountains C-4, C-3, and B-4 quadrangles, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2014-22
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 4 p
      Online_Linkage: http://doi.org/10.14509/29140
  Cross_Reference:
    Citation_Information:
      Originator: Benowitz, J.A.
      Originator: Layer, P.W.
      Originator: Wypych, Alicja
      Originator: Twelker, Evan
      Publication_Date: 2015
      Title: 40Ar/39Ar data from the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2015-10
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 19 p
      Online_Linkage: http://doi.org/10.14509/29454
  Cross_Reference:
    Citation_Information:
      Originator: Wypych, Alicja
      Originator: Twelker, Evan
      Originator: Freeman, L.K.
      Originator: Lande, Lauren
      Originator: Newberry, R.J.
      Originator: Reioux, D.A.
      Originator: Sicard, K.R.
      Publication_Date: 2015
      Title: Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2015-16
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 4 p
      Online_Linkage: http://doi.org/10.14509/29518
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: This data is being released in the DGGS Raw Data File series. The information has been examined by several geologists familiar with the study area, but the data and accompanying report have not been formally reviewed for technical content or for conformity to the editorial standards of DGGS. Questions regarding the accuracy of information in the data files can be best answered by the originating lab.
  Logical_Consistency_Report: not applicable
  Completeness_Report: This data release is complete.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Samples were collected with location coordinates (WGS84 datum) determined using handheld GPS units (Trimble Juno T5), with a reported accuracy of about 10 m.
  Lineage:
    Process_Step:
      Process_Description: Fieldwork - Fresh, unweathered samples from surficial outcrops were collected by DGGS field geologists; samples were selected based on presence of sufficiently large crystals and/or fresh glassy matrix.
      Process_Date: 2010
    Process_Step:
      Process_Description: Sample preparation and analysis - Before processing, samples were examined under binocular microscope, or thin sections were prepared and scrutinized to eliminate the possibility of analyzing altered mineral phases. Rock samples that we found to be suitable for dating by 40Ar/39Ar geochronology analysis were submitted to the Geochronology Laboratory at the University of Alaska Fairbanks (UAF) where they were dated according to the protocols outlined in the accompanying report.
      Process_Date: 2010
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: point
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.00001
      Longitude_Resolution: 0.00001
      Geographic_Coordinate_Units: decimal degrees
    Geodetic_Model:
      Horizontal_Datum_Name: World Geodetic System of 1984
      Ellipsoid_Name: WGS 84
      Semi-major_Axis: 6378137
      Denominator_of_Flattening_Ratio: 298.257223563000025
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: rdf2017-1-summary-data-locations.csv
      Entity_Type_Definition: Identification numbers, coordinates, sample descriptions, and summary ages of each sample
      Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Entity_Attribute_Layer_Name: summary-data-locations
    Attribute:
      Attribute_Label: SAMPLE
      Attribute_Definition: Label assigned in the field to identify the sample.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: Generic example of a sample identifier: YYAAA9999X: YY=last two digits of 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.
    Attribute:
      Attribute_Label: LAB_SAMPLE_NUMBER
      Attribute_Definition: Label used by the lab to identify the sample.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: The lab sample number is typically identical to the field sample number. However, in some cases, the sample number provided by the lab does differ from the number assigned in the field. We provide both numbers to document instances in which the sample numbers in the lab files differ from the field sample number.
    Attribute:
      Attribute_Label: COLLECTOR
      Attribute_Definition: The geologist who collected the sample.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: The samples presented in this report were collected by the authors or other DGGS staff.
    Attribute:
      Attribute_Label: LONGITUDE
      Attribute_Definition: Longitude, WGS84
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -147.683996
          Range_Domain_Maximum: -146.046127
          Attribute_Units_of_Measure: decimal degrees
    Attribute:
      Attribute_Label: LATITUDE
      Attribute_Definition: Latitude, WGS84
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 62.865366
          Range_Domain_Maximum: 63.3054
          Attribute_Units_of_Measure: decimal degrees
    Attribute:
      Attribute_Label: DATED_MATERIAL
      Attribute_Definition: Indicates the type of material that was used for analysis
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: The type of material that was selected for dating varied according to mineral composition and grainsize of the submitted rock sample. This field specifies whether the age was derived from a mineral separate (generally 1 to 10 individual crystals dated together as a single run), a single crystal, or the whole rock.
    Attribute:
      Attribute_Label: MINERAL
      Attribute_Definition: Indicates the mineral that was used for analysis
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: The minerals selected for dating would typically be grains of biotite, hornblende, or muscovite.
    Attribute:
      Attribute_Label: DESCRIP_1
      Attribute_Definition: Description of the sample
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: Characters 1 to 254 of a brief sample or station description.
    Attribute:
      Attribute_Label: DESCRIP_2
      Attribute_Definition: Extension of the sample or station description for descriptions which are greater than 254 characters in length
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: Characters greater than 254 of the sample or station description.
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the descriptive text is shorter than 254 characters.
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: DESCRIP_3
      Attribute_Definition: Extension of the sample or station description for descriptions which are greater than 509 characters in length
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: Characters greater than 509 of the sample or station description.
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the descriptive text is shorter than 509 characters.
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: INTEGRATED_AGE_MA
      Attribute_Definition: Integrated age and age error in million years
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: The values are a concatenation of the integrated age determination and the calculated error associated with the integrated age determination
    Attribute:
      Attribute_Label: PLATEAU_AGE_MA
      Attribute_Definition: Plateau age and age error in million years
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: The values are a concatenation of the plateau age determination and the calculated error associated with the plateau age determination
    Attribute:
      Attribute_Label: PLATEAU_REMARKS
      Attribute_Definition: Comments and additional values that pertain to the plateau age determination method or interpretation.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: Free text
    Attribute:
      Attribute_Label: AGE_TYPE_PREFERRED
      Attribute_Definition: Indicates AGE_TYPE_PREFERRED age.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: A discussion of the preferred age for each analysis is provided in the accompanying lab report. The possible values are: plateau, isochron, weighted average, or integrated.
    Attribute:
      Attribute_Label: PREFERRED_AGE
      Attribute_Definition: The values are a concatenation of the preferred age determination and the calculated error associated with the preferred age determination
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: The preferred age for each analysis is discussed in detail in the accompanying lab report.
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: rdf2017-1-step-heating-data.csv
      Entity_Type_Definition: Power output levels and resultant measurements from each sample run
      Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Entity_Attribute_Layer_Name: step-heating-data
    Attribute:
      Attribute_Label: SAMPLE
      Attribute_Definition: Label assigned in the field to identify the sample.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: Generic example of a sample identifier: YYAAA9999X: YY=last two digits of 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.
    Attribute:
      Attribute_Label: LAB_SAMPLE_NUMBER
      Attribute_Definition: Label used by the lab to identify the sample.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: The lab sample number is typically identical to the field sample number. However, in some cases, the sample number provided by the lab does differ from the number assigned in the field. We provide both numbers to document instances in which the sample numbers in the lab files differ from the field sample number.
    Attribute:
      Attribute_Label: Laser_mW
      Attribute_Definition: Laser output level in megawatts
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 500
          Range_Domain_Maximum: 9000
          Attribute_Units_of_Measure: megawatts
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the values in the row were calculated by weighting the individual heating steps by the fraction of 39Ar released.
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    Attribute:
      Attribute_Label: Integrated
      Attribute_Definition: We indicate whether the values in the row were derived from a heating step or calculated by weighting the individual heating steps by the fraction of 39Ar released.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: The values in the row were derived from a heating step
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Integrated
          Enumerated_Domain_Value_Definition: the values in this row were calculated by weighting the individual heating steps by the fraction of 39Ar released
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: Cum39Ar
      Attribute_Definition: Cumulative ratio of 39Argon released at this step
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.011
          Range_Domain_Maximum: 1
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the value was not applicable or not calculated by the lab
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    Attribute:
      Attribute_Label: Me40Ar39Ar
      Attribute_Definition: Measured 40Ar/39Ar ratio for each heating step, corrected for blank and 39Ar decay
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 4.16378
          Range_Domain_Maximum: 3038.86308
    Attribute:
      Attribute_Label: Er40Ar39Ar
      Attribute_Definition: The one sigma error for each 40Ar/39Ar measurement
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.00576
          Range_Domain_Maximum: 1739.05949
    Attribute:
      Attribute_Label: Me37Ar39Ar
      Attribute_Definition: The ratio of measured 37Ar to measured 39Ar for each heating interval for each sample corrected for blank and 37Ar and 39Ar decay
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -0.0432
          Range_Domain_Maximum: 47.03996
    Attribute:
      Attribute_Label: Er37Ar39Ar
      Attribute_Definition: The one sigma error for each 37Ar/39Ar measurement
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.00019
          Range_Domain_Maximum: 2.38277
    Attribute:
      Attribute_Label: Me36Ar39Ar
      Attribute_Definition: Ratio of measured 36Ar to measured 39Ar for each step interval for each sample corrected for blank and 39Ar decay
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -0.01277
          Range_Domain_Maximum: 1.39354
    Attribute:
      Attribute_Label: Er36Ar39Ar
      Attribute_Definition: The one sigma error for each 36Ar/39Ar measurement
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.00004
          Range_Domain_Maximum: 0.14835
    Attribute:
      Attribute_Label: Atm40Ar
      Attribute_Definition: Percent of 40Ar which is atmospheric in composition at each step level
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -29.7821
          Range_Domain_Maximum: 107.59738
    Attribute:
      Attribute_Label: ErAtm40Ar
      Attribute_Definition: The one sigma error for the percent of 40Ar which is atmospheric in composition at each step level
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.28248
          Range_Domain_Maximum: 47.39787
    Attribute:
      Attribute_Label: MeCaK
      Attribute_Definition: Ratio of Calcium to Potassium as determined from 37Ar/39Ar
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -0.07926
          Range_Domain_Maximum: 89.27769
    Attribute:
      Attribute_Label: ErCaK
      Attribute_Definition: The one sigma error for each Ca/K determination
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.00034
          Range_Domain_Maximum: 4.67768
    Attribute:
      Attribute_Label: MeClK
      Attribute_Definition: Ratio of Chlorine to Potassium as determined from 38Ar/39Ar
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -0.00284
          Range_Domain_Maximum: 0.85412
    Attribute:
      Attribute_Label: ErClK
      Attribute_Definition: The one sigma error for each Cl/K determination
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.00002
          Range_Domain_Maximum: 0.0317
    Attribute:
      Attribute_Label: Ar40Rad39ArK
      Attribute_Definition: Ratio of radiogenic 40Ar to 39Ar derived from potassium
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -2.10524
          Range_Domain_Maximum: 2924.23597
    Attribute:
      Attribute_Label: Er40ArRad39ArK
      Attribute_Definition: One sigma error for each 40ArRad/39ArK value
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.01733
          Range_Domain_Maximum: 1742.12817
    Attribute:
      Attribute_Label: AgeMa
      Attribute_Definition: Calculated age for each temperature step for each sample
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -16.41
          Range_Domain_Maximum: 4702.53
          Attribute_Units_of_Measure: MA
    Attribute:
      Attribute_Label: ErAgeMa
      Attribute_Definition: One sigma error of the age determination of each heating step
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.13
          Range_Domain_Maximum: 994.6
          Attribute_Units_of_Measure: MA
    Attribute:
      Attribute_Label: WeightedAverageOfJFromStandards
      Attribute_Definition: J value, calculated from the weighted average of standards placed in various positions in the nuclear reactor
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Unrepresentable_Domain: WeightedAverageOfJFromStandards value and error
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Alaska Division of Geological & Geophysical Surveys
      Contact_Position: Metadata Manager
      Contact_Address:
        Address_Type: mailing and physical
        Address: 3354 College Road
        City: Fairbanks
        State_or_Province: AK
        Postal_Code: 99709-3707
        Country: USA
      Contact_Voice_Telephone: (907)451-5039
      Contact_Facsimile_Telephone: (907)451-5050
      Contact_Electronic_Mail_Address: dggspubs@alaska.gov
      Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
  Resource_Description: RDF 2017-1
  Distribution_Liability: 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.
  Standard_Order_Process:
    Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.
    Fees: Contact DGGS for current pricing
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ASCII tabular files
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://doi.org/10.14509/29699
    Fees: Free download
Metadata_Reference_Information:
  Metadata_Date: 20170404
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Alaska Division of Geological & Geophysical Surveys
      Contact_Position: Metadata Manager
      Contact_Address:
        Address_Type: mailing and physical
        Address: 3354 College Road
        City: Fairbanks
        State_or_Province: AK
        Postal_Code: 99709-3707
        Country: USA
      Contact_Voice_Telephone: (907)451-5039
      Contact_Facsimile_Telephone: (907)451-5050
      Contact_Electronic_Mail_Address: dggspubs@alaska.gov
      Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
  Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.
  Metadata_Extensions:
    Online_Linkage: http://www.dggs.alaska.gov/metadata/dggs.ext
    Profile_Name: dggs metadata extensions