Identification_Information:
  Citation:
    Citation_Information:
      Originator: Naibert, T.J.
      Originator: Twelker, Evan
      Originator: Wypych, Alicja
      Originator: Athey, J.E.
      Originator: Newberry, R.J.
      Originator: Lopez, J.A.
      Originator: Regan, S.P.
      Originator: Sicard, K.R.
      Originator: Wildland, A.D.
      Originator: Wyatt, W.C.
      Publication_Date: 2020
      Title: Field station locations and magnetic susceptibility data collected in 2019 for the Eastern Tanacross Project, Tanacross and Nabesna quadrangles, Alaska
      Geospatial_Data_Presentation_Form: report and digital data
      Series_Information:
        Series_Name: Raw Data File
        Issue_Identification: RDF 2019-9
      Publication_Information:
        Publication_Place: Fairbanks, Alaska, United States
        Publisher: Alaska Division of Geological & Geophysical Surveys
      Other_Citation_Details: 2 p.
      Online_Linkage: http://doi.org/10.14509/30268
  Description:
    Abstract: During the 2019 field season, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted 1:100,000-scale geologic mapping and sampling of a 1,900-square-mile area in the eastern Tanacross and Nabesna quadrangles. The area lies approximately 15 miles east of Tok and 12 miles north of Northway. The area is of present and historical interest for its potential mineral resources, including porphyry copper-molybdenum-gold, intrusion-related gold, volcanogenic massive sulfides, and rare-earth-element enriched mineralization. It encompasses prospects including Oreo, Ladue, Pushbush, Honks, Goodrich, and Mount Fairplay. The majority of the area was previously mapped at reconnaissance 1:250,000 scale by the USGS during the 1960s. The purpose of this project is to produce a more accurate and modern geologic map and supporting data that will promote mineral discovery in eastern Interior Alaska. This report provides locations, field descriptions of rocks, and magnetic susceptibility measurements from rock outcrop and/or hand samples throughout the map area. The data associated with this report are available in digital format as a comma-separated value (CSV) file. All files can be downloaded from the DGGS website: http://doi.org/10.14509/30268.
    Purpose: These data were collected as a component of the DGGS Eastern Tanacross Project. The purpose of this project is to produce a more accurate and modern geologic map and supporting data that will promote mineral discovery in eastern Interior Alaska.
    Supplemental_Information: >magnetic-susceptibility: Magnetic susceptibility measurements, location coordinates, and field station descriptions
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2019
    Currentness_Reference: ground condition
  Status:
    Progress: complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -142.530853
      East_Bounding_Coordinate: -140.998906
      North_Bounding_Coordinate: 63.766381
      South_Bounding_Coordinate: 62.780850
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: geoscientificInformation
    Theme:
      Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys
      Theme_Keyword: Exploration
      Theme_Keyword: Field Notes
      Theme_Keyword: Geologic
      Theme_Keyword: Geology
      Theme_Keyword: Magnetic Data
      Theme_Keyword: Magnetic Susceptibility
      Theme_Keyword: Magnetics
      Theme_Keyword: Mineral Assessment
      Theme_Keyword: Mineral Exploration
      Theme_Keyword: Mineral Resources
      Theme_Keyword: Minerals
      Theme_Keyword: Resource Assessment
      Theme_Keyword: Resource Information
      Theme_Keyword: Sample Location
    Place:
      Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys
      Place_Keyword: Beaver Creek
      Place_Keyword: Big Creek
      Place_Keyword: Chicken Creek
      Place_Keyword: Damundtali Lake
      Place_Keyword: Deep Creek
      Place_Keyword: Dennison Fork
      Place_Keyword: Gardiner Creek
      Place_Keyword: Goodrich Prospect
      Place_Keyword: Honks Prospect
      Place_Keyword: Ladue Prospect
      Place_Keyword: Ladue River
      Place_Keyword: McArthur Creek
      Place_Keyword: McCord Creek
      Place_Keyword: Mount Fairplay
      Place_Keyword: Mount Fairplay Prospect
      Place_Keyword: Oreo Prospect
      Place_Keyword: Prindle Volcano
      Place_Keyword: Pushbush Prospect
      Place_Keyword: Scottie Creek
      Place_Keyword: Swamp Creek
      Place_Keyword: Yellow Water Creek
  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 Eastern Tanacross Project was funded by State of Alaska general funds and by the U.S. Geological Survey under Cooperative Agreement Number G19AC00262. Disclaimer: The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Geological Survey. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: This report provides locations, field descriptions of rocks, and magnetic susceptibility measurements from rock outcrop and/or hand samples throughout the map area. Field rock descriptions are composed of observations and interpretations made by project geologists in the field or in the field office and may not be updated to reflect further observations, geochemical data, microscopic investigation, or other information. Field rock descriptions in this data file have not been reviewed for technical content and should be considered preliminary. Magnetic susceptibility measurements were collected using Terraplus KT-10 model handheld magnetic susceptibility meters. The KT-10 meters have a maximum sensitivity of 1 x 10-6 SI units on smooth surfaces and a measurable susceptibility range between 0.001 x 10-3 to 1999.99 x 10-3 SI. The values reported here are for individual measurements performed on representative surfaces of the sampled rock outcrop and/or hand samples. Up to twelve susceptibility readings were recorded at each field station. Efforts were made to avoid anisotropic effects by measuring multiple sides of outcrops and/or hand samples whenever possible. Magnetic susceptibility was not measured at a minority of field stations because hand samples were intensely weathered or were not large enough to cover the coil of the KT-10 meter for accurate measurement. These station locations are provided without magnetic susceptibility readings for completeness. 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.
  Logical_Consistency_Report: not applicable
  Completeness_Report: This data release is complete.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Location data for field stations were collected using GPS-enabled tablets or smartphones running the ESRI Collector App. Data were merged into an ArcGIS geodatabase. The devices have a reported error of about 10 m. Latitude and longitude are reported in the WGS84 datum.
  Lineage:
    Process_Step:
      Process_Description: Field data collection - Location data for field stations were collected using GPS-enabled tablets or smartphones running the ESRI Collector App. Data were merged into an ArcGIS geodatabase. Field rock descriptions are composed of observations and interpretations made by project geologists in the field or in the field office.
      Process_Date: 2019
    Process_Step:
      Process_Description: Magnetic susceptibility measurements - Magnetic susceptibility measurements were collected using Terraplus KT-10 model handheld magnetic susceptibility meters. The values reported here are for individual measurements performed on representative surfaces of the sampled rock outcrop.
      Process_Date: 2019
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: rdf2019-9-magnetic-susceptibility.csv
      Entity_Type_Definition: Magnetic susceptibility measurements, location coordinates, and field station descriptions
      Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Entity_Attribute_Layer_Name: magnetic-susceptibility
    Attribute:
      Attribute_Label: station_number
      Attribute_Definition: The label assigned in the field to identify the station.
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: Generic example of a station identifier: YYAAA9999X: YY=last two digits of the year the station 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: longitude_WGS84
      Attribute_Definition: Longitude, WGS84
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -142.530853
          Range_Domain_Maximum: -140.998906
          Attribute_Units_of_Measure: decimal degrees
    Attribute:
      Attribute_Label: latitude_WGS84
      Attribute_Definition: Latitude, WGS84
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 62.78085
          Range_Domain_Maximum: 63.766381
          Attribute_Units_of_Measure: decimal degrees
    Attribute:
      Attribute_Label: rock_description
      Attribute_Definition: Description of the sample or station
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Unrepresentable_Domain: A brief sample or station description.
    Attribute:
      Attribute_Label: mag1
      Attribute_Definition: magnetic susceptibility measurement
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 289
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility measurement was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag2
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 274
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag3
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 260
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag4
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 174
          Attribute_Units_of_Measure: 10^-4 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag5
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 240
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag6
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.001
          Range_Domain_Maximum: 77
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag7
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.01
          Range_Domain_Maximum: 76.6
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag8
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.01
          Range_Domain_Maximum: 61.2
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag9
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.02
          Range_Domain_Maximum: 71.4
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag10
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.019
          Range_Domain_Maximum: 73
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag11
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.02
          Range_Domain_Maximum: 32.2
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: mag12
      Attribute_Definition: magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.06
          Range_Domain_Maximum: 23.2
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: average_mag
      Attribute_Definition: average magnetic susceptibility
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.0005
          Range_Domain_Maximum: 247.4
          Attribute_Units_of_Measure: 10^-3 SI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: NULL
          Enumerated_Domain_Value_Definition: average magnetic susceptibility was not measured
          Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys
    Attribute:
      Attribute_Label: number_measurements
      Attribute_Definition: number of magnetic susceptibility measurements
      Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 12
          Attribute_Units_of_Measure: 10^-3 SI
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 2019-9
  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: report and digital data
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://doi.org/10.14509/30268
    Fees: Free download
Metadata_Reference_Information:
  Metadata_Date: 20200114
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Person: Simone Montayne
        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
  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