Identification_Information:
  Citation:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Lande, L.L.
      Originator: Newberry, R.J.
      Originator: Wypych, Alicja
      Originator: Sicard, K.R.
      Originator: Freeman, L.K.
      Publication_Date: 2020
      Title: Magmatic and structural framework of PGE and other mineralization in northwestern Wrangellia, central Alaska
      Geospatial_Data_Presentation_Form: report and digital data
      Series_Information:
        Series_Name: Report of Investigation
        Issue_Identification: RI 2020-6
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 72 p.
      Online_Linkage: https://doi.org/10.14509/30468
  Description:
    Abstract: A thick and regionally extensive sequence of low-grade-metamorphosed Late Triassic basaltic rocks, the Nikolai Greenstone, is a characteristic component of the stratigraphy of the Wrangellia terrane in central and southeastern Alaska, Yukon, and British Columbia. Mafic to ultramafic intrusions feeding this extensive volcanic province hold high geologic potential for discovery of economically signifigant magmatic sulfide deposits. This digital data file provides microprobe compositions of olivine and pyroxine from ultramafic samples across the study area. Mineral compositions and the ratio of molar MgO per(MgO+FeO) interpret magma evolution and provide insight into the magmatic-geochemical framework of Ni-Cu-Co-PGE mineralization related to the Butte, Rainy, Eureka, Canwell, and Talkeetna Mountains intrusions. These data accompany a summary report of findings from a multiyear Alaska Division of Geological & Geophysical Surveys (DGGS) project to better understand the geologic context of mineralization hosted by the Wrangellia terrane in the eastern Alaska Range and Talkeetna Mountains, with particular emphasis on evaluating the area's potential for hosting the strategic and critical platinum-group elements (PGEs) and cobalt (Co). Users can access the complete report and digital data from the DGGS website: http://doi.org/10.14509/30468.
    Purpose: These data accompany a summary report of findings from a multiyear Alaska Division of Geological & Geophysical Surveys (DGGS) project to better understand the geologic context of mineralization hosted by the Wrangellia terrane in the eastern Alaska Range and Talkeetna Mountains, with particular emphasis on evaluating the area's potential for hosting the strategic and critical platinum-group elements (PGEs) and cobalt (Co).
    Supplemental_Information: >microprobe-data: Sample locations, measured mineral compositions, and calculated ratios of molar MgO per(MgO+FeO).
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 2013
        Ending_Date: 2020
    Currentness_Reference: ground condition
  Status:
    Progress: complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -148.635600
      East_Bounding_Coordinate: -145.701100
      North_Bounding_Coordinate: 63.355800
      South_Bounding_Coordinate: 62.583800
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: geoscientificInformation
    Theme:
      Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys
      Theme_Keyword: Geochemical Data
      Theme_Keyword: Geochemistry
      Theme_Keyword: Geologic
      Theme_Keyword: Geological Process
      Theme_Keyword: Geology
      Theme_Keyword: Igneous
      Theme_Keyword: Igneous Rocks
      Theme_Keyword: Intrusion-hosted
      Theme_Keyword: Major Oxides
      Theme_Keyword: Microprobe Analysis
      Theme_Keyword: Mineral Composition
      Theme_Keyword: Mineral Deposit Models
      Theme_Keyword: Mineral Exploration
      Theme_Keyword: Mineralogy
      Theme_Keyword: Minerals
      Theme_Keyword: STATEMAP Project
      Theme_Keyword: Sample Location
      Theme_Keyword: Strategic and Critical Minerals Assessment Project
      Theme_Keyword: Ultramafic
    Place:
      Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys
      Place_Keyword: Delta River Mining District
      Place_Keyword: Valdez Creek Mining District
      Place_Keyword: Yentna Mining District
    Stratum:
      Stratum_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys
      Stratum_Keyword: Nikolai Greenstone
      Stratum_Keyword: Wrangellia Terrane
  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)451-5020
      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: The Alaska Legislature funded this project as part of the State's Strategic and Critical Minerals Assessment project (part of the DGGS Airborne Geophysical/Geological Mineral Inventory [AGGMI] program). Fieldwork in summer 2014 in the Talkeetna Mountains was also partially funded by the USGS National Cooperative Geologic Mapping Program, STATEMAP component, under award number G14AC00167 for 2014. The views and conclusions in this document are those of the authors. They should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government.
  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: https://doi.org/10.14509/29454
  Cross_Reference:
    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
      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: https://doi.org/10.14509/29699
  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: https://doi.org/10.14509/29119
  Cross_Reference:
    Citation_Information:
      Originator: Holm-Denoma, C.S.
      Originator: Sicard, K.R.
      Originator: Twelker, Evan
      Publication_Date: 2020
      Title: U-Pb geochronology of igneous and detrital zircon samples from the Tok River area, eastern Alaska Range, and Talkeetna Mountains, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2020-3
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 20 p
      Online_Linkage: https://doi.org/10.14509/30439
  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: https://doi.org/10.14509/29480
  Cross_Reference:
    Citation_Information:
      Originator: Naibert, T.J.
      Originator: Benowitz, J.A.
      Originator: Wypych, Alicja
      Originator: Sicard, K.R.
      Originator: Twelker, Evan
      Publication_Date: 2018
      Title: 40Ar/39Ar data from the Tanacross D-1 and D-2, Big Delta B-4 and B-5, and Mount Hayes A-6 quadrangles, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2018-3
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 15 p
      Online_Linkage: https://doi.org/10.14509/30112
  Cross_Reference:
    Citation_Information:
      Originator: Todd, Erin
      Originator: Kylander-Clark, Andrew
      Originator: Wypych, Alicja
      Originator: Twelker, Evan
      Originator: Sicard, K.R.
      Publication_Date: 2017
      Title: U-Pb and Lu-Hf isotope, age, and trace-element data from zircons at four sites in the western Alaska Range and Talkeetna Mountains, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2017-2
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 7 p
      Online_Linkage: https://doi.org/10.14509/29717
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Publication_Date: 2017
      Title: Geologic mapping in the Talkeetna Mountains and eastern Alaska Range: A story of mineralization and deformation (presentation): Alaska Geological Society Luncheon, February 21, 2017
      Series_Information:
        Series_Name: Poster and Presentation
        Issue_Identification: Twelker, Evan, 2017
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 49 p
      Online_Linkage: https://doi.org/10.14509/29836
  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: https://doi.org/10.14509/27181
  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: https://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: https://doi.org/10.14509/26821
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Waldien, T.S.
      Originator: Newberry, R.J.
      Originator: Freeman, L.K.
      Originator: Sicard, K.R.
      Originator: Lande, L.L.
      Originator: Wypych, Alicja
      Originator: Reioux, D.A.
      Originator: Bachmann, E.N.
      Publication_Date: 2020
      Title: Bedrock geologic map of the eastern Denali Highway area, Mount Hayes, Healy, and Talkeetna Mountains quadrangles, Alaska
      Series_Information:
        Series_Name: Report of Investigation
        Issue_Identification: RI 2020-7
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Online_Linkage: https://doi.org/10.14509/30469
  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: https://doi.org/10.14509/29160
  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: https://doi.org/10.14509/29139
  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: https://doi.org/10.14509/27284
  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: https://doi.org/10.14509/29531
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: O'Sullivan, P.B.
      Publication_Date: 2016
      Title: U-Pb zircon age data from meta-igneous rocks in the Clearwater Mountains, Mount Hayes A-6 Quadrangle, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2016-8
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 17 p
      Online_Linkage: https://doi.org/10.14509/29663
  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: https://doi.org/10.14509/29140
  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: https://doi.org/10.14509/29518
  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: https://doi.org/10.14509/29567
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: Microprobe measurements were compared to standards of known composition were used to create a quantitative calibration. Calculated sums of reported elemental values are near 100 percent, indicating suitability for the investigation's scope.
  Logical_Consistency_Report: not applicable
  Completeness_Report: This data release is complete.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Location data were collected using Trimble Juno T5 GPS units. The devices have a reported error of about 10 m. Latitude and longitude are reported in the WGS84 datum.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Lande, L.L.
          Publication_Date: 2016
          Title: A petrological model for emplacement of the ultramafic Ni-Cu-PGE alpha complex, eastern Alaska Range
          Publication_Information:
            Publication_Place: Fairbanks, Alaska
            Publisher: University of Alaska Fairbanks
          Online_Linkage: https://scholarworks.alaska.edu/handle/11122/6828
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 2016
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Lande, L.L., 2016
      Source_Contribution: microprobe analysis
    Process_Step:
      Process_Description: Sample collection - During the 2013, 2014, 2015 field seasons, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted geologic mapping and sampling throughout the Wrangellia geologic belt. Igneous and metaigneous rocks showing little alteration or weathering were collected for whole-rock major-oxide, minor-oxide, and trace-element analyses to aid in classification and study of petrogenesis and tectonic setting. Most samples are grab samples, which were collected for their overall representation of the outcrop.
      Process_Date: 2015
    Process_Step:
      Process_Description: Microprobe analysis - Mineral compositions of olivine and clinopyroxene grains were anayzed using the University of Alaska Fairbanks JEOL JXA-8530F Electron Microprobe, with a beam current of 25 nA at 20 KeV and a beam diameter of 10 microns. Ca was measured using the PETL crystal, Fe and Ni were measured using LiFL crystals, and Mg and Si were measured using TAPL crystals. Count times were 2 minutes on peak and 2 minutes on background. As noted in tables 1 and 2 of the accompanying report, some of the analyses used routines similar to those documented in Lande (2016).
      Source_Used_Citation_Abbreviation: Lande, L.L., 2016
      Process_Date: 2016
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_Attribute_Layer_Name: microprobe-data
      Entity_Type_Label: ri2020-006-microprobe-data.csv, ri2020-006-microprobe-data-dictionary.csv
      Entity_Type_Definition: Sample locations, measured mineral compositions, and calculated ratios of molar MgO per(MgO+FeO).
      Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: sample
      Attribute_Definition: A generic example of a sample identifier: YYAAA9999X: YY=last two digits of year, AAA=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_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: string
    Attribute:
      Attribute_Label: mineral_analyzed
      Attribute_Definition: The mineral analyzed by electron probe micro-analysis
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: string
    Attribute:
      Attribute_Label: latitude_wgs84
      Attribute_Definition: latitude, WGS84
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: longitude_wgs84
      Attribute_Definition: longitude, WGS84
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: intrusion
      Attribute_Definition: Mafic-ultramafic intrusive complex name referenced in the report
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: string
    Attribute:
      Attribute_Label: points_averaged
      Attribute_Definition: The number of individual microprobe spot analyses averaged
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: SiO2_pct
      Attribute_Definition: The un-normalized concentration of SiO2, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: TiO2_pct
      Attribute_Definition: The un-normalized concentration of TiO2, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: Al2O3_pct
      Attribute_Definition: The un-normalized concentration of Al2O3, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: FeO_pct
      Attribute_Definition: The un-normalized concentration of total Fe as FeO, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: MnO_pct
      Attribute_Definition: The un-normalized concentration of MnO, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: MgO_pct
      Attribute_Definition: The un-normalized concentration of MgO, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: Na2O
      Attribute_Definition: The un-normalized concentration of Na2O, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: CaO_pct
      Attribute_Definition: The un-normalized concentration of CaO, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: Cr2O3
      Attribute_Definition: The un-normalized concentration of Cr2O3, measured in percent, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: Ni_ppm
      Attribute_Definition: The un-normalized concentration of Ni, measured in ppm, by electron probe micro-analysis wavelength dispersive X-ray spectroscopy
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: total
      Attribute_Definition: The total of all analyzed elements
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: Mg_number
      Attribute_Definition: Molar MgO / (MgO+FeO)
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: calculated_melt_Mg_number
      Attribute_Definition: The calculated melt Mg number (Mg #) based on a mineral-melt partition coefficient, Kd (Fe/ Mg), of 0.32 for olivine and 0.20 for clinopyroxene
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
    Attribute:
      Attribute_Label: calculated_melt_TiO2
      Attribute_Definition: Calculated melt TiO2 based on a mineral-melt partition coefficient, Kd (TiO2), of 0.007 for olivine and 0.45 for clinopyroxene
      Attribute_Definition_Source: this report
      Attribute_Domain_Values:
        Unrepresentable_Domain: number
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
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      Contact_Electronic_Mail_Address: dggspubs@alaska.gov
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  Resource_Description: RI 2020-6
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    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: report and digital data
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          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: https://doi.org/10.14509/30468
    Fees: Free download
Metadata_Reference_Information:
  Metadata_Date: 20201002
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Alaska Division of Geological & Geophysical Surveys
        Contact_Person: Simone Montayne
      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)451-5020
      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:
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    Profile_Name: dggs metadata extensions