Field station locations and magnetic susceptibility data collected in 2024 for the Chena and Steese projects, Yukon-Tanana Uplands, Alaska

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

Frequently anticipated questions:


What does this data set describe?

Title:
Field station locations and magnetic susceptibility data collected in 2024 for the Chena and Steese projects, Yukon-Tanana Uplands, Alaska
Abstract:
Field station locations and magnetic susceptibility data collected in 2024 for the Chena and Steese projects, Yukon-Tanana Uplands, Alaska, Raw Data File 2025-5, provides locations, field descriptions of rocks, and magnetic susceptibility measurements from rock outcrops and/or hand samples collected during the 2024 field season for 1:100,000-scale bedrock geologic mapping of a 9,635 km2 (~3,720 mi2) area of the Yukon-Tanana Uplands of eastern Interior Alaska, including parts of the Big Delta, Circle, Fairbanks, and Livengood quadrangles. These stations are from the Chena and Steese projects. The field area for the Steese project stretches from 25 miles west of Fairbanks to 100 miles northeast of Fairbanks. Chena project stretches up to 50 miles south and east of Chena Hot Springs. These project areas include multiple current and historical mineral exploration projects and were identified by the U.S. Geological Survey (USGS) as prospective for rare-earth elements (REEs) and both critical and non-critical mineral resources. These data and report are available from the DGGS website: http://doi.org/10.14509/31476.
Supplemental_Information:
data:    Table of identification numbers, coordinates, station and sample descriptions, magnetic susceptibility, and an accompanying data dictionary.
  1. How might this data set be cited?
    Moshrefzadeh, J.A., Buchanan, J.W., Naibert, T.J., Twelker, Evan, Newberry, R.J., Szumigala, D.J., Barrera, M.L., Norwood, L.P., Acosta, M.D., and Regan, S.P., 2025, Field station locations and magnetic susceptibility data collected in 2024 for the Chena and Steese projects, Yukon-Tanana Uplands, Alaska: Raw Data File RDF 2025-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 5 p.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -148.431190
    East_Bounding_Coordinate: -143.814885
    North_Bounding_Coordinate: 65.525486
    South_Bounding_Coordinate: 64.613304
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 2024
    Ending_Date: 2025
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: csv
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a point data set.
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0000001. Longitudes are given to the nearest 0.0000001. Latitude and longitude values are specified in decimal degrees. 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?
    rdf2025-5-station-descriptions.csv, rdf2025-5-station-descriptions-data-dictionary.csv
    Table of identification numbers, coordinates, station and sample descriptions, magnetic susceptibility, and an accompanying data dictionary. (Source: 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?
    The DGGS Chena and Steese projects are funded by the State of Alaska and the USGS Earth Mapping Resources Initiative (Earth MRI) program under Cooperative Agreement Numbers G24AC00323 and G23AC00372. 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 USGS. Mention of trade names or commercial products does not constitute their endorsement by the USGS.
  3. To whom should users address questions about the data?
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    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 (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.

Why was the data set created?

The Steese and Chena area geologic mapping projects are components of ongoing USGS and DGGS collaborative efforts to upgrade geologic data in the Yukon-Tanana Uplands as part of the larger Earth MRI project. These project areas include multiple current and historical mineral exploration targets and were identified by the U.S. Geological Survey (USGS) as prospective for rare-earth elements (REEs) and both critical and non-critical mineral resources.

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: 2024 (process 1 of 1)
    Field station descriptions - Location data for field stations were collected using GPS-enabled tablets or smartphones running the Esri Field Maps app, which have a reported error of 10-12 meters. Latitude and longitude were recorded in the WGS84 datum. Project geologists observed and interpreted rock and outcrop samples in the field or at the field office. Magnetic susceptibility measurements were taken using Terraplus KT-10 model handheld magnetic susceptibility meters. These meters have a maximum sensitivity of 1 x 10^-6 Systeme International (SI) units on smooth surfaces and can measure susceptibility within a range of 0.001 x 10^-3 to 1,999.99 x 10^-3 SI. The values reported here are based on individual measurements performed on representative surfaces of the sampled rock outcrops or hand samples. Up to 12 susceptibility readings were recorded at each field station. To minimize atmospheric effects, multiple sides of outcrops or hand samples were measured whenever possible. Magnetic susceptibility was not measured at a small subset of field stations due to intensely weathered hand samples or samples that were too small to cover the coil of the KT-10 meter for accurate measurement. These stations are presented with zero measurements for completeness.
  3. What similar or related data should the user be aware of?
    Lessard, R.R., Wildland, A.D., and Montayne, Simone, 2022, Bedrock geologic map database of the Caribou Creek area, Big Delta C-4 and D-4 quadrangles, east-central Alaska: Miscellaneous Publication MP 172, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 p
    Newberry, R.J., Bundtzen, T.K., Clautice, K.H., Combellick, R.A., Douglas, Tom, Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary geologic map of the Fairbanks mining district, Alaska: Public Data File PDF 96-16, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 17 p., 2 sheets, scale 1:63,360
    Smith, T.E., Robinson, M.S., Weber, F.R., Waythomas, C.F., and Reifenstuhl, R.R., 1994, Geologic map of the upper Chena River area, eastern interior Alaska: Professional Report PR 115, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 19 p., 1 sheet, scale 1:63,360
    Werdon, M.B., Newberry, R.J., Athey, J.E., and Szumigala, D.J., 2004, Bedrock geologic map of the Salcha River-Pogo area, Big Delta Quadrangle, Alaska: Report of Investigation RI 2004-1B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 19 p., 1 sheet, scale 1:63,360
    Wiltse, M.A., Reger, R.D., Newberry, R.J., Pessel, G.H., Pinney, D.S., Robinson, M.S., and Solie, D.N., 1995, Geologic map of the Circle mining district, Alaska: Report of Investigation RI 95-2A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360

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

  1. How well have the observations been checked?
    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, petrographic 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 Système International (SI) units on smooth surfaces and a measurable susceptibility range between 0.001 x 10-3 and 1,999.99 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. We recorded up to 12 susceptibility readings at each field station and made efforts to avoid atmospheric effects by measuring multiple sides of outcrops and/or hand samples whenever possible.
  2. How accurate are the geographic locations?
    Location data for field stations were collected using GPS-enabled tablets or smartphones running the Esri Field Maps app. Data were merged into an ArcGIS geodatabase. The devices have a reported error of 10-12 m. Latitude and longitude are reported in the WGS84 datum.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This data release is complete.
  5. How consistent are the relationships among the observations, including topology?
    Not applicable

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
    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 (https://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? RDF 2025-5
  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: 04-Mar-2025
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Attn: Simone Montayne
Metadata Manager
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
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.50 on Tue Mar 04 17:38:06 2025