Airborne radiometric survey, Boulder Batholith region, Montana, 2022

Dates

Publication Date: 2024-04-22
Start Date: 2022-06-11
End Date: 2022-08-22

Citation

Allen Langhans, A.D., Drenth, B.J., and Connell, D.M., 2024, Airborne magnetic and radiometric survey, Boulder Batholith region, Montana, 2022: U.S. Geological Survey data release, https://doi.org/10.5066/P13JSLF6.

Summary

This data release provides digital flight line data for a high-resolution airborne radiometric survey over parts of Montana in the vicinity of the Boulder Batholith. The airborne survey was jointly funded by the Earth Mapping Resources Initiative and Kennecott Exploration Company. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of 34,041 line km of magnetic and radiometric data were acquired over an irregular-shaped area of 6178 km2. Data were collected from a helicopter flown at a nominal terrain clearance of 100 meters (m) above topography along E-W flight lines spaced at 200 m intervals. Tie lines were flown in an N-S direction every 2000 [...]

Summary

This data release provides digital flight line data for a high-resolution airborne radiometric survey over parts of Montana in the vicinity of the Boulder Batholith. The airborne survey was jointly funded by the Earth Mapping Resources Initiative and Kennecott Exploration Company. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of 34,041 line km of magnetic and radiometric data were acquired over an irregular-shaped area of 6178 km2. Data were collected from a helicopter flown at a nominal terrain clearance of 100 meters (m) above topography along E-W flight lines spaced at 200 m intervals. Tie lines were flown in an N-S direction every 2000 m. Data were collected by Sander Geophysics Limited (SGL), and Dewberry Engineers, Inc. under contract with the USGS using a helicopter with a fully calibrated gamma-ray spectrometer. The survey operated out of the Butte, Montana, airport from June of 2022 to August of 2022. Files that are available in this child item include data for the radiometric survey and geotiffs of the gridded results.

Version History
First release: July, 2023
Version 2: April, 2024

Version 2
This project was jointly funded by the US Geological Survey Earth Mapping Resources Initiative and Kennecott Exploration Company. The original data release (July, 2023) consisted of USGS-funded data only. Data that were added to the data release on April, 2024, which consisted of aeromagnetic and radiometric data, were funded by Kennecott Exploration Company and was withheld from the original release as proprietary data. This revision includes all data acquired as part of the survey.

Changes from previous version:
1) Added aeromagnetic and radiometric data funded by Kennecott Exploration Company.
2) Updated metadata to reflect the extent of the full data release.
3) Updated spatial reference .shp files to reflect the extent of the full data release.
4) Updated contractor report and deliverables to reflect the extent of the full data release.
5) Updated geotiffs to reflect the extent of the full data release.

Contacts

Point of Contact :: Benjamin J Drenth
Originator :: April D Allen Langhans, Benjamin J Drenth, Dylan M Connell
Metadata Contact :: April D Allen Langhans, GS GGGSC DM Team
Publisher :: U.S. Geological Survey
USGS Mission Area :: Energy and Minerals
USGS Program :: Mineral Resources Program
SDC Data Owner :: Geology, Geophysics, and Geochemistry Science Center
Distributor :: U.S. Geological Survey - ScienceBase

Attached Files

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RadMetadata_AirborneRadiometricSurveyBoulderBatholithMT2022.xml Original FGDC Metadata	View	46.41 KB	application/fgdc+xml
“ASCII Radiometric Flightline Data Without Spectra”		193.4 MB	text/csv
“Radiometric Flightline Spectra Data”		28.21 GB	application/octet-stream
DataDictionary_AirborneRadiometricSurveyBoulderBatholithMT2022-datadxny.csv “ASCII Data Dictionary”		7.4 KB	text/csv
VersionReadMe_AirborneMagneticAndRadiometricSurveyBoulderBatholithMT2022.txt		1.32 KB	text/plain

Extension: Potassium_AirborneRadiometricSurveyBoulderBatholithMT2022.zip
Potassium_AirborneRadiometricSurveyBoulderBatholithMT2022.tfw		94 Bytes
Potassium_AirborneRadiometricSurveyBoulderBatholithMT2022.tif “Georeferenced Radiometric Potassium Map”		961.73 KB

Extension: RTK_AirborneRadiometricSurveyBoulderBatholithMT2022.zip
RTK_AirborneRadiometricSurveyBoulderBatholithMT2022.tfw		94 Bytes
RTK_AirborneRadiometricSurveyBoulderBatholithMT2022.tif “Georeferenced Radiometric Thorium/Potassium Map”		961.73 KB

Extension: RUK_AirborneRadiometricSurveyBoulderBatholithMT2022.zip
RUK_AirborneRadiometricSurveyBoulderBatholithMT2022.tfw		94 Bytes
RUK_AirborneRadiometricSurveyBoulderBatholithMT2022.tif “Georeferenced Radiometric Uranium/Potassium Map”		961.73 KB

Extension: RUT_AirborneRadiometricSurveyBoulderBatholithMT2022.zip
RUT_AirborneRadiometricSurveyBoulderBatholithMT2022.tfw		94 Bytes
RUT_AirborneRadiometricSurveyBoulderBatholithMT2022.tif “Georeferenced Radiometric Uranium/Thorium Map”		961.73 KB

Extension: Ternary_AirborneRadiometricSurveyBoulderBatholithMT2022.zip
Ternary_AirborneRadiometricSurveyBoulderBatholithMT2022.pgw		94 Bytes
Ternary_AirborneRadiometricSurveyBoulderBatholithMT2022.png “Radiometric Survey Overview Image”		240.42 KB
Ternary_AirborneRadiometricSurveyBoulderBatholithMT2022.tfw		94 Bytes
Ternary_AirborneRadiometricSurveyBoulderBatholithMT2022.tif “Georeferenced Radiometric Ternary (K, Th, U) map”		961.73 KB

Extension: Thorium_AirborneRadiometricSurveyBoulderBatholithMT2022.zip
Thorium_AirborneRadiometricSurveyBoulderBatholithMT2022.tfw		94 Bytes
Thorium_AirborneRadiometricSurveyBoulderBatholithMT2022.tif “Georeferenced Radiometric Thorium Map”		1.25 MB

Extension: Uranium_AirborneRadiometricSurveyBoulderBatholithMT2022.zip
Uranium_AirborneRadiometricSurveyBoulderBatholithMT2022.tfw		94 Bytes
Uranium_AirborneRadiometricSurveyBoulderBatholithMT2022.tif “Georeferenced Radiometric Uranium Map”		961.73 KB

Related External Resources

Type: Citation

Day, W.C., 2019, The Earth Mapping Resources Initiative (Earth MRI)—Mapping the Nation’s critical mineral resources (ver. 1.2, September 2019): U.S. Geological Survey Fact Sheet 2019–3007, 2 p., https://doi.org/10.3133/fs20193007.	https://doi.org/10.3133/fs20193007

Type: Web Link

Earth Mapping Resources Initiative (Earth MRI)	https://www.usgs.gov/special-topics/earth-mri

Purpose

Data was collected as part of the Earth Mapping Resource Initiative (Earth MRI) program of the U.S. Geological Survey (USGS) in collaboration with Kennecott Exploration Company to better understand the geology and critical mineral resources in the area. The primary goal of the airborne magnetic and radiometric survey is to map lateral variations of magnetization and natural radioactivity that are related to differences in rock and soil type, and to aid surface and subsurface geologic mapping.

Airborne radiometric survey, Boulder Batholith region, Montana, 2022

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