Kuskokwim airborne magnetic and radiometric survey, Kilbuck and Buckstock Mountains, Alaska

Metadata also available as - [Parseable text] - [XML]

Frequently anticipated questions:


What does this data set describe?

Title:
Kuskokwim airborne magnetic and radiometric survey, Kilbuck and Buckstock Mountains, Alaska
Abstract:
Kuskokwim airborne magnetic and radiometric survey, Kilbuck and Buckstock Mountains, Alaska, Geophysical Report 2025-5, covers parts of the Russian Mission, Sleetmute, Bethel, and Taylor Mountains quadrangles, 80-260 kilometers east of Bethel, Alaska. New Resolution Geophysics, USA collected magnetic and radiometric data with a helicopter from May 20th to July 31st, 2025. A total of 49,565 line kilometers were collected, with 24,246 line kilometers collected in block A (Buckstock) and 25,319 line kilometers collected in block B (Kilbuck). In total, this survey covers 15,926 km2 in this region. NRG makes use of the Scintrex CS3 Cesium magnetometers in both the aircraft stinger and ground base stations. The radiometric crystals were located in the aircraft cabin; 33.6 liters of downward-facing and 8.4 liters of upward-facing crystals were used for this survey. The Kilbuck and Buckstock Mountains survey was flown with a line spacing of 400 meters (m) and a nominal ground clearance of 100 m. TThese data support geologic interpretation of the Kuskokwim River region's framework, highlight its mineral potential, and support future resource exploration across southwest Alaska. These data are provided as a Geophysical Report under an open end-user license and are available on the DGGS website https://doi.org/10.14509/31724.
Supplemental_Information:
ascii_data:    ASCII format line data, other ASCII data	
databases_geosoft:    Geosoft format database of final line data, other Geosoft format databases	
documents:    Project report, calibration reports	
grids_geosoft:    Oasis montaj Geosoft GRD format gridded data	
grids_tif:    Geographically registered data value rasters of gridded data, GeoTiff format	
kmz:    Keyhole Markup Language (KML) kmz archive files of project data. Viewable on Google Earth and other compatible programs	
maps_pdf_format:    Printable and geographically registered maps in pdf format. Compatible with mobile device navigation and desktop mapping applications.	
vector_data:    Line path and survey boundary in Esri shapefile (shp) format
  1. How might this data set be cited?
    Fusso, L.A., Petersen, E.I., and New Resolution Geophysics, USA, 2025, Kuskokwim airborne magnetic and radiometric survey, Kilbuck and Buckstock Mountains, Alaska: Geophysical Report GPR 2025-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 18 p
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -160.414870
    East_Bounding_Coordinate: -157.239563
    North_Bounding_Coordinate: 61.962170
    South_Bounding_Coordinate: 60.014714
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2025
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: digital, data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a raster data set.
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 4
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -159
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000.000000
      False_Northing: 0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest .00000001
      Ordinates (y-coordinates) are specified to the nearest .00000001
      Planar coordinates are specified in Meters
      The horizontal datum used is WGS84.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    ascii_data
    ASCII format line data, other ASCII data (Source: New Resolution Geophysics)
    databases_geosoft
    Geosoft format database of final line data, other Geosoft format databases (Source: New Resolution Geophysics)
    documents
    Project report, calibration reports (Source: New Resolution Geophysics and Alaska Division of Geological & Geophysical Surveys (DGGS))
    grids_geosoft
    Oasis montaj Geosoft GRD format gridded data (Source: New Resolution Geophysics and Alaska Division of Geological & Geophysical Surveys (DGGS))
    grids_tif
    Geographically registered data value rasters of gridded data, GeoTiff format (Source: Alaska Division of Geological & Geophysical Surveys (DGGS))
    kmz
    Keyhole Markup Language (KML) kmz archive files of project data. Viewable on Google Earth and other compatible programs (Source: Alaska Division of Geological & Geophysical Surveys (DGGS))
    maps_pdf_format
    Printable and geographically registered maps in pdf format. Compatible with mobile device navigation and desktop mapping applications. (Source: New Resolution Geophysics)
    vector_data
    Line path and survey boundary in Esri shapefile (shp) format (Source: Alaska Division of Geological & Geophysical Surveys (DGGS))

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
    This work was funded by the United States Geological Survey's Earth Mapping Resources Initiative (Earth MRI), grants G23AC00408 and G24AC00629. The authors thank President/Director/Chief Pilot Ryan Louw for their expertise in managing this survey. 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.
  3. To whom should users address questions about the data?
    Alaska Division of Geological & Geophysical Surveys
    GIS Manager
    3354 College Rd
    Fairbanks, AK
    USA

    907-451-5020 (voice)
    dggsgis@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

Why was the data set created?

These data support geologic interpretation of the Kuskokwim River region's framework, highlight its mineral potential, and support future resource exploration across southwest Alaska.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2025 (process 1 of 2)
    Data acquisition - New Resolution Geophysics, USA collected magnetic and radiometric data with a helicopter from May 20th to July 31st, 2025. A total of 49,565 line kilometers were collected, with 24,246 line kilometers collected in block A (Buckstock) and 25,319 line kilometers collected in block B (Kilbuck). NRG makes use of the Scintrex CS3 Cesium magnetometers in both the aircraft stinger and ground base stations. The radiometric crystals were located in the aircraft cabin; 33.6 liters of downward-facing and 8.4 liters of upward-facing crystals were used for this survey. The Kilbuck and Buckstock Mountains survey was flown with a line spacing of 400 meters (m) and a nominal ground clearance of 100 m.
    Date: 2025 (process 2 of 2)
    Data cataloged for archival and publication - Final data were published and archived by DGGS.
  3. What similar or related data should the user be aware of?
    Burns, L.E., Barefoot, J.D., Surveys, Fugro Airborne, and Stevens Exploration Management Corp., 2019, Aniak electromagnetic and magnetic airborne geophysical survey data compilation: Geophysical Report GPR 2019-14, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 15 p
    Burns, L.E., Barefoot, J.D., Woods, Rebecca-Ellen, WGM Mining and Geological Consultants, Inc., and Dighem Surveys and Processing, 2019, Nyac magnetic airborne geophysical survey data compilation: Geophysical Report GPR 2019-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 3 p
    Burns, L.E., Emond, A.M., SIAL Geosciences, Inc., and On-line Exploration Services, Inc., 2020, Airborne magnetic geophysical survey of the Holitna basin area, Alaska, data compilation: Geophysical Report GPR 2020-13, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 11 p
    Burns, L.E., Graham, G.R.C., Barefoot, J.D., Surveys, Fugro Airborne, and Stevens Exploration Management Corp., 2019, Sleetmute electromagnetic and magnetic airborne geophysical survey data compilation: Geophysical Report GPR 2019-16, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 13 p
    LePain, D.L., Emond, A.M., and Edcon, Inc., 2020, Ground gravity geophysical survey of the Holitna basin area, Alaska, data compilation: Raw Data File RDF 2020-8, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 5 p

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

  1. How well have the observations been checked?
    Geophysical data were acquired according to the contractor, contract, and request-for-proposals specifications. For additional detail about survey parameters, see the accompanying project report available in the documents directory of this data distribution package.
  2. How accurate are the geographic locations?
    Station coordinates were positioned using a real-time or post-processed corrected differential GPS.
  3. How accurate are the heights or depths?
    Not applicable
  4. Where are the gaps in the data? What is missing?
    This data set includes files that contain processed aeromagnetic measurements, radiometric measurements, magnetic measurements, altimetry measurements, and locational data for the entire survey area.
  5. How consistent are the relationships among the observations, including topology?
    Data originate from one company using DGGS contract specifications for all data (see accompanying project report). The originating coordinate system was retained for all publication products.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Use_Constraints:
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
  1. Who distributes the data set? (Distributor 1 of 1)
    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    3354 College Road
    Fairbanks, AK
    USA

    907-451-5020 (voice)
    907-451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
  2. What's the catalog number I need to order this data set? GPR 2025-5
  3. What legal disclaimers am I supposed to read?
    The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services 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, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requestor or anyone else exceed the fee paid for the electronic service or product.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 04-Dec-2025
Metadata author:
Simone Montayne
3354 College Road
Fairbanks, AK
USA

907-451-5020 (voice)
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.50 on Thu Dec 04 18:40:09 2025