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Description: "The survey is split into two blocks, one covering the Hartville Uplift region (Block A), and the other covering the Shirley Mountains region (Block B). The airborne survey was mainly funded by the State of Wyoming, with a smaller contribution from the Earth Mapping Resources Initiative (Earth MRI). The survey was designed by the Wyoming State Geological Survey (WSGS) and contracted by the USGS. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of ca. 83,000 line km of magnetic and radiometric data were acquired over areas totaling ca. 15,000 km2. In the Hartville Uplift region (Block A), data were collected from a fixed-wing aircraft 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. In the Shirley Mountains region (Block B), data were collected from a helicopter flown at a nominal terrain clearance of 100 meters (m) above topography along N-S flight lines spaced at 200 m intervals. Tie lines were flown in an E-W direction every 2000 m. Data were collected by NV5 Geospatial, Precision GeoSurveys, and EDCON-PRJ under contract to the USGS using aircraft with magnetometers mounted in stingers and fully calibrated gamma-ray spectrometers. The survey operated out of airports in Casper, Lusk, and Torrington, Wyoming, from May to July of 2025." Data Release: Drenth, B.J., Brown, P.J., and Connell, D.M., 2026, Airborne magnetic and radiometric survey, Hartville Uplift and Shirley Mountains regions, Wyoming, 2025: U.S. Geological Survey data release, https://doi.org/10.5066/P1C7TJKK.Data from USGS have in some cases been minimally modified (i.e. clipped to spatial extent, projected, shaded, etc.) but have not been formally reviewed or altered by the WSGS. Users are encouraged to visit the USGS data release to download the original dataset.The following geophysical data layers are included in this service:Footprint - Survey Footprint ShapefileTotal Magnetic Intensity - Georeferenced Image of Total Magnetic Intensity. Pink is high, blue is low magnetic intensity.Reduced-to-pole Magnetic Intensity - Georeferenced Image of Reduced-to-pole Magnetic Intensity. Pink is high, blue is low reduced-to-pole magnetic intensity.First Vertical Derivative - Georeferenced Image of First Vertical Derivative. Pink is high, blue is low first vertical derivative.Ternary (K, eTh, eU) - Georeferenced Image of Radiometric Ternary map. Red = Potassium, Green = Thorium, Blue = Uranium. Potassium (K) - Georeferenced Image of Radiometric Potassium map. Pink is high, blue is low potassium concentration.Thorium (eTh) - Georeferenced Image of Radiometric Thorium map. Pink is high, blue is low thorium concentration.Uranium (eU) - Georeferenced Image of Radiometric Uranium map. Pink is high, blue is low uranium concentration.
Service Item Id: abfdcc79f5b84c799296f7c24b518d27
Copyright Text: This survey and release of the dataset was funded by the state of Wyoming, designed by the Wyoming State Geological Survey (WSGS), and contracted by the USGS.
U.S. Geological Survey roles and contributions: Scientist-In-Charge: Benjamin J. Drenth
Contract technical liaison: Dylan M. Connell Survey design and coordination: Benjamin J. Drenth
Preliminary data quality assurance: Benjamin J. Drenth, April D. Allen Langhans, Dylan M. Connell Data preparation for release: April D. Allen Langhans Metadata preparation for release: April D. Allen Langhans
Project Manager: Brent Marz Wyoming State Geological Survey:
Survey design and coordination:Patricia M. Webber, Ranie M. Lynds, Rachel N. Toner, Erin A. Campbell Funding: State of Wyoming
Contractor roles and contributions: Contractor: New-Sense Geophysics Ltd. and Merrick-Surdex Joint Venture Helicopter operator: Air Resources Helicopter, Inc.
Contact Person: Chris Evans
Project Manager: Chris Evans
Field Crew: Joaquin Castruita, Jesus da la Torre, Nelson Larrachea Pilots: Peter Jansen, Camden Espeland, Tony Chambers, Taylor Wade, Nick Heller, Wyatt Reeves-Hawkings Data processing and report: Joaquin Castruita, Lily Manoukian, Luis Vargas, Chris Evans
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Document Info:
Title: Airborne magnetic and radiometric survey, South Pass-Granite Mountains region, Wyoming, 2023
Author:
Comments: "The survey is split into two blocks, one covering the Hartville Uplift region (Block A), and the other covering the Shirley Mountains region (Block B). The airborne survey was mainly funded by the State of Wyoming, with a smaller contribution from the Earth Mapping Resources Initiative (Earth MRI). The survey was designed by the Wyoming State Geological Survey (WSGS) and contracted by the USGS. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of ca. 83,000 line km of magnetic and radiometric data were acquired over areas totaling ca. 15,000 km2. In the Hartville Uplift region (Block A), data were collected from a fixed-wing aircraft 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. In the Shirley Mountains region (Block B), data were collected from a helicopter flown at a nominal terrain clearance of 100 meters (m) above topography along N-S flight lines spaced at 200 m intervals. Tie lines were flown in an E-W direction every 2000 m. Data were collected by NV5 Geospatial, Precision GeoSurveys, and EDCON-PRJ under contract to the USGS using aircraft with magnetometers mounted in stingers and fully calibrated gamma-ray spectrometers. The survey operated out of airports in Casper, Lusk, and Torrington, Wyoming, from May to July of 2025." Data Release: Drenth, B.J., Brown, P.J., and Connell, D.M., 2026, Airborne magnetic and radiometric survey, Hartville Uplift and Shirley Mountains regions, Wyoming, 2025: U.S. Geological Survey data release, https://doi.org/10.5066/P1C7TJKK.Data from USGS have in some cases been minimally modified (i.e. clipped to spatial extent, projected, shaded, etc.) but have not been formally reviewed or altered by the WSGS. Users are encouraged to visit the USGS data release to download the original dataset.The following geophysical data layers are included in this service:Footprint - Survey Footprint ShapefileTotal Magnetic Intensity - Georeferenced Image of Total Magnetic Intensity. Pink is high, blue is low magnetic intensity.Reduced-to-pole Magnetic Intensity - Georeferenced Image of Reduced-to-pole Magnetic Intensity. Pink is high, blue is low reduced-to-pole magnetic intensity.First Vertical Derivative - Georeferenced Image of First Vertical Derivative. Pink is high, blue is low first vertical derivative.Ternary (K, eTh, eU) - Georeferenced Image of Radiometric Ternary map. Red = Potassium, Green = Thorium, Blue = Uranium. Potassium (K) - Georeferenced Image of Radiometric Potassium map. Pink is high, blue is low potassium concentration.Thorium (eTh) - Georeferenced Image of Radiometric Thorium map. Pink is high, blue is low thorium concentration.Uranium (eU) - Georeferenced Image of Radiometric Uranium map. Pink is high, blue is low uranium concentration.
Subject: The South Pass-Granite Mountains survey was designed to meet complementary needs related to geologic mapping and mineral resource research.
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Keywords: biota
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