Identification_Information:
  Citation:
    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
      Geospatial_Data_Presentation_Form: report and digital data
      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: http://doi.org/10.14509/30112
  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) geologic mapping projects in the Northeastern Tanacross map area in the Tanacross D-1 and D-2 quadrangles, the Richardson map area in the Big Delta B-4 and B-5 quadrangles, and the Wrangellia map area in the Mount Hayes A-6 Quadrangle. Field samples were collected by the DGGS Mineral Resources section during detailed geologic mapping campaigns in 2013 and 2017. The complete report and digital data are available through the DGGS website: http://doi.org/10.14509/30112.
    Purpose: The Northeastern Tanacross map area lies within the Yukon-Tanana terrane on the boundary between the Fortymile and Lake George Assemblages. The map area encompasses documented porphyry Cu-Mo-Au deposits including Taurus, Fishhook (also known as SW Pika), and Pika Canyon, and is adjacent to the Fortymile Mining District. Previously published geologic mapping includes a reconnaissance 1:250,000-scale map and a slightly modified map published by the USGS. New DGGS mapping will provide detailed geologic context for the known porphyry systems in the map area and links to mineral occurrences elsewhere in the region, including across the border in Yukon, Canada. The Richardson project area in Interior Alaska is approximately 30-50 miles west of the active Pogo gold mine and includes several active intrusion-related gold exploration properties, including Naosi, Uncle Sam, and Democrat Lode. Recent DGGS geologic mapping will improve the understanding of the area's geology and controls on gold mineralization to facilitate industry exploration targeting. The Wrangellia project area lies along the Denali Highway in the eastern Wrangellia Terrane, which includes magmatic sulfide nickel-copper-cobalt and platinum-group element mineralization hosted in mafic-ultramafic rocks in a structurally complex geologic setting. The sample presented in this report comes from the Clearwater Terrane, an isolated region of metamorphic rock with Permian protoliths caught up in the regional Talkeetna Shear Zone.
    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: 2013
        Ending_Date: 2017
    Currentness_Reference: ground condition
  Status:
    Progress: complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -146.928045
      East_Bounding_Coordinate: -141.279735
      North_Bounding_Coordinate: 64.466044
      South_Bounding_Coordinate: 63.196416
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: geoscientificInformation
  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 DGGS 2017 Northeastern Tanacross and Richardson projects were funded through State of Alaska general funds. The Wrangellia project was funded by Capital Improvement Project funds through the State's Strategic and Critical Minerals Assessment project. The authors acknowledge the contributions of the 2017 Richardson and Northeastern Tanacross project field crew: Melanie B. Werdon, Jen E. Athey, Amanda L. Willingham, Alec C. Lockett, and the 2013 Wrangellia field crew: Larry K. Freeman, Rainer J. Newberry, Erik N. Bachmann, David A. Reioux, Amy L. Tuzzolino, and T. Colby Wright.
  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: 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: 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: 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
  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: 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: 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: http://doi.org/10.14509/29699
  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: 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: 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: 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: 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: 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: 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: 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: http://doi.org/10.14509/29663
  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: http://doi.org/10.14509/29717
  Cross_Reference:
    Citation_Information:
      Originator: Wypych, Alicja
      Originator: Twelker, Evan
      Originator: Athey, J.E.
      Originator: Lockett, A.C.
      Originator: Naibert, T.J.
      Originator: Sicard, K.R.
      Originator: Werdon, M.B.
      Originator: Willingham, A.L.
      Publication_Date: 2017
      Title: Major-oxide and trace-element geochemical data from rocks collected in the Tanacross C-1, D-1, and D-2 quadrangles, Alaska in 2017
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2017-10
      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/10.14509/29778
  Cross_Reference:
    Citation_Information:
      Originator: Twelker, Evan
      Originator: Wypych, Alicja
      Originator: Sicard, K.R.
      Originator: Naibert, T.J.
      Originator: Werdon, M.B.
      Originator: Athey, J.E.
      Originator: Willingham, A.L.
      Originator: Lockett, A.C.
      Publication_Date: 2017
      Title: Major-oxide and trace-element geochemical data from rocks collected in the Richardson mining district, Big Delta Quadrangle, Alaska
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2017-11
      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/10.14509/29779
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: This data set is being released into 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 the analytical values 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: Sample location coordinates (in WGS84 datum) were obtained using GPS-enabled field tablets, with a typical reported accuracy of about 10 meters.
  Lineage:
    Process_Step:
      Process_Description: Fieldwork - Fresh, unweathered samples from surficial outcrops were collected by DGGS field geologists; samples were selected based on their cross-cutting relationships with structural features.
      Process_Date: 2012
    Process_Step:
      Process_Description: Sample preparation and analysis - Before processing, samples were examined under a binocular microscope, or thin sections were prepared and scrutinized to eliminate the possibility of analyzing altered mineral phases. Rock samples 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. Additional sample preparation details may be found in the accompanying report.
      Process_Date: 2012
    Process_Step:
      Process_Description: Revisions - a sample description sorting error in the summary table was corrected, February 15, 2019.
      Process_Date: 2019
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: point
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.000001
      Longitude_Resolution: 0.000001
      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: rdf2018-3-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: The 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 the year the sample was collected, 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: The 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: PROJECT
      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: -146.927846
          Range_Domain_Maximum: -141.279938
          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: 63.196506
          Range_Domain_Maximum: 64.465954
          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: DESCRIPTION
      Attribute_Definition: Description of the sample
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: A brief sample or station description.
    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_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the PLATEAU_AGE_MA value was not calculated by the lab
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    Attribute:
      Attribute_Label: PLATEAU_PERCENT_39AR
      Attribute_Definition: Value in percent of the 39 Ar used in that portion of the spectrum to determine the plateau age
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 38.4
          Range_Domain_Maximum: 97.8
          Attribute_Units_of_Measure: percent
    Attribute:
      Attribute_Label: PLATEAU_MSWD
      Attribute_Definition: The mean square weighted deviation of the plateau age calculation
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.33
          Range_Domain_Maximum: 2.39
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the PLATEAU_AGE_MA value was not calculated by the lab
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    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_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the PLATEAU_AGE_MA value was not calculated by the lab
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    Attribute:
      Attribute_Label: W_A_AGE_MA
      Attribute_Definition: Weighted average 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 weighted average age determination and the calculated error associated with the weighted mean average age determination
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the W_M_AGE_MA value was not calculated by the lab
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    Attribute:
      Attribute_Label: ISOCHRON_AGE
      Attribute_Definition: Isochron 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 isochron age determination and the calculated error associated with the isochron age determination
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the ISOCHRON_AGE value was not provided by the lab
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    Attribute:
      Attribute_Label: ISOCHRON_MSWD
      Attribute_Definition: The mean square weighted deviation of the isochron age calculation
      Attribute_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the value was not calculated by the lab
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    Attribute:
      Attribute_Label: ISOCHRON_REMARKS
      Attribute_Definition: Comments and additional values that pertain to the isochron 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_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: A NULL or blank values indicates that the value was not calculated by the lab
          Enumerated_Domain_Value_Definition_Source: Geochronology Laboratory at the University of Alaska Fairbanks (UAF)
    Attribute:
      Attribute_Label: AGE_TYPE_PREFERRED
      Attribute_Definition: Indicates the age type of the 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: rdf2018-3-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: 0.0017
          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: 0.2319
          Range_Domain_Maximum: 41.46334
    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: 0.01037
          Range_Domain_Maximum: 9.54597
    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: -0.08208
          Range_Domain_Maximum: 1.16705
    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: 0.00038
          Range_Domain_Maximum: 0.73712
    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: -0.05612
          Range_Domain_Maximum: 0.13677
    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: 0.00007
          Range_Domain_Maximum: 0.03167
    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: -8205.58955
          Range_Domain_Maximum: 97.42027
    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: 0.25173
          Range_Domain_Maximum: 387396.3875
    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: -0.15059
          Range_Domain_Maximum: 2.14315
    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: 0.0007
          Range_Domain_Maximum: 1.35268
    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: -0.02209
          Range_Domain_Maximum: 0.12175
    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: 0.00004
          Range_Domain_Maximum: 0.01331
    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: 1.06933
          Range_Domain_Maximum: 24.71558
    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: 0.02407
          Range_Domain_Maximum: 13.21114
    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: 9.75
          Range_Domain_Maximum: 212.88
          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: 0.34
          Range_Domain_Maximum: 111.3
          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)451-5020
      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
  Resource_Description: RDF 2018-3
  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/10.14509/30112
    Fees: Free download
Metadata_Reference_Information:
  Metadata_Date: 20181017
  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:
    Online_Linkage: http://www.dggs.alaska.gov/metadata/dggs.ext
    Profile_Name: dggs metadata extensions