Layer: TMI_IGRF_AirborneMagneticAndRadiometricSurveySierraMadreElkheadMedicineBowMountainsRegionWyAndCo2023-24.tif (ID: 2)

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Name: TMI_IGRF_AirborneMagneticAndRadiometricSurveySierraMadreElkheadMedicineBowMountainsRegionWyAndCo2023-24.tif

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Description: This data release provides digital flight line data for a high-resolution airborne magnetic survey over the Sierra Madre-Elkhead Mountains-Medicine Bow Mountains region of southern Wyoming and northern Colorado. The airborne survey was funded by the Earth Mapping Resources Initiative. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of about 72,000 line km of magnetic and radiometric data were acquired over an irregular-shaped area of about 13,000 km2. 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 New-Sense Geophysics Ltd. and Merrick-Surdex Joint Venture, LLP, under contract to the USGS using a helicopter with a magnetometer mounted in a stinger. The survey operated out of airports in Laramie (WY), Saratoga (WY), Steamboat Springs (CO), Craig (CO), Walden (CO), and Loveland (CO) from September of 2023 to September of 2024. Files that are available in this publication include flight line data for the magnetic survey and a report describing the survey parameters, field operations, quality control and data reduction procedures. A zip file is provided that contains the contractor's deliverable products that includes Geosoft databases and grids for the magnetic and radiometric survey and the report describing the survey and data reduction.

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Copyright Text: This survey and release of the dataset was funded by the Earth Mapping Resources Initiative (Earth MRI). 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, Anahita A. Tikku, Dylan M. Connell Data preparation for release: Philip J. Brown Metadata preparation for release: Philip J. Brown Data and Metadata Reviewer: Anji Shah Project Manager: Jayna R. Winehouse Wyoming State Geological Survey roles and contributions: Survey design assistance: Rachel N. Toner, Patricia M. Webber, Ranie M. Lynds Contractor roles and contributions: Contractor: New-Sense Geophysics Ltd. and Merrick-Surdex Joint Venture, LLP Helicopter operator: Air Resources Helicopters, Inc. Pilots: Peter Jansen, Camden Espeland, Taylor Wade, Nick Heller, Wyatt Reeves-Hawkings, Beau Crist, Brook Walker, Miguel Barajas Project Managers: William E.S. (Ted) Urquhart, Chris Evans, Doug Jacoby, Kasey Brown Field Operations: Chris Evans, Joaquin Castruita, Jesus de la Torre, Nelson Larrachea Data processing and report: Chris Evans, Joaquin Castruita, Lily Manoukian, Luis Vargas

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