Shaw Creek and Shawnee Peak airborne magnetic and radiometric geophysical survey

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Frequently anticipated questions:


What does this data set describe?

Title:
Shaw Creek and Shawnee Peak airborne magnetic and radiometric geophysical survey
Abstract:
The Shaw Creek and Shawnee Peak airborne magnetic and radiometric geophysical survey covers parts of the Big Delta and Eagle quadrangles northeast of Delta Junction, Alaska. Magnetic and radiometric data were collected with a helicopter July 4-25, 2020 by MPX Geophysics LTD. A total of 10,100 line kilometers were collected over approximately 2,600 square kilometers. The magnetometer was mounted to a forward-facing fixed boom ("stinger"). The radiometric crystals were located in the cabin of the helicopter. Data were collected in eight named blocks. Mertie Mountains, Shaw Creek, and Volkmar River have a line spacing of 400 meters (m) and a mean ground clearance of 130 m. Stoneboy has a line spacing of 200 m and a mean ground clearance of 80 m. Eagle, Echo, Healy, and LMS-X have a line spacing of 100 m and a mean ground clearance of 80 m. The data, as well as additional metadata, are available from the DGGS website: <http://doi.org/10.14509/30551>. This data release provides preliminary files as received from the contractor and is intended to provide timely support of concurrent mineral-resource exploration of the project area. The data have been evaluated for general functionality and logical consistency but have not undergone full technical review.
Supplemental_Information:
preliminary_data:    This data release provides preliminary files as received from the contractor and is intended to provide timely support of concurrent mineral-resource exploration of the project area. The data have been evaluated for general functionality and logical consistency but have not undergone full technical review. These data are intended to be replaced and this publication will be superseded when comprehensive data review and file organization are complete.
  1. How should this data set be cited?

    Emond, A.M., and LTD, MPX Geophysics, 2020, Shaw Creek and Shawnee Peak airborne magnetic and radiometric geophysical survey: Geophysical Report GPR 2020-16, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 p.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -157.817428
    East_Bounding_Coordinate: -154.598616
    North_Bounding_Coordinate: 62.665410
    South_Bounding_Coordinate: 60.825744

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 2020
    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?

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -147
      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 World Geodetic System of 1984.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257223563000025.

  7. How does the data set describe geographic features?

    preliminary_data
    This data release provides preliminary files as received from the contractor and is intended to provide timely support of concurrent mineral-resource exploration of the project area. The data have been evaluated for general functionality and logical consistency but have not undergone full technical review. These data are intended to be replaced and this publication will be superseded when comprehensive data review and file organization are complete. (Source: MPX Geophysics LTD)


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 supported by State of Alaska designated general funds as part of DGGS' FY2020 operating budget, and by industry partners Northern Star (Pogo) LLC, Millrock Resources Inc., and Northway Resources Corp.

  3. To whom should users address questions about the data?

    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    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


Why was the data set created?

The data from the Shaw Creek-Shawnee Peak airborne magnetic and radiometric geophysical survey will be used for guiding geologic mapping, promoting resource exploration, generating mineral exploration targets, and be a part of the continuous regional magnetic data coverage of the Yukon Tanana Uplands.


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: 2020 (process 1 of 1)
    Data collection, processing, reporting - Magnetic and radiometric data were collected with a helicopter July 4-25, 2020 by MPX Geophysics LTD.

  3. What similar or related data should the user be aware of?


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?

    These data are positioned with post-processed differential GPS. Discussion of grid resolution and factors that may impact the overall horizontal accuracy of the gridded data is available in the documents directory of this data distribution package.

  3. How accurate are the heights or depths?

    Not applicable

  4. Where are the gaps in the data? What is missing?

    This data release provides preliminary files as received from the contractor and is intended to provide timely support of concurrent mineral-resource exploration of the project area. The data have been evaluated for general functionality and logical consistency but have not undergone full technical review. These data are intended to be replaced and this publication will be superseded when comprehensive data review and file organization are complete.

  5. How consistent are the relationships among the observations, including topology?

    Data originate from one company using the same contract specifications for all data. 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)

    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    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
  2. What's the catalog number I need to order this data set?

    GPR 2020-16

  3. What legal disclaimers am I supposed to read?

    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.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 06-Aug-2020
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Attn: Simone Montayne
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
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
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.21 on Thu Aug 6 19:18:18 2020