Layer: Total Magnetic Intensity (ID: 1)

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Description: This data release provides digital flight line data for a high-resolution airborne magnetic survey over the Laramie Mountains region of Wyoming. The airborne survey was funded by the Earth Mapping Resources Initiative (Earth MRI). The survey was designed by the USGS in collaboration with the Wyoming State Geological Survey 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. 71,200 line km of magnetic data were acquired over an area totaling ca. 12,600 km2 across two survey blocks. Data were collected from helicopters flown at a nominal terrain clearance of 100 meters (m) above topography along flight lines spaced at 200 m intervals. The flight lines were flown E-W in the southern block (A1+A2 block) and N-S in the northern block (A3+A4+A5 block). Tie lines were flown every 4000 m, perpendicular in direction to the regular flight lines. Data were collected by New-Sense Geophysics Ltd. and Merrick-Surdex Joint Venture, LLP under contract to the USGS using helicopters with magnetometers mounted in stingers. The survey operated out of airports in Laramie, Wheatland, Casper, and Douglas, Wyoming, from September of 2024 to September of 2025. Files that are available in this publication include flight line data for the magnetic survey, and reports 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 survey and reports describing the survey and data reduction.

Service Item Id: 35851a7499734e2d9bafbd1cbc747a8b

Copyright Text: 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, Dylan M. Connell Data preparation for release: Philip J. Brown, Benjamin J. Drenth Metadata preparation for release: Philip J. Brown Project Manager: Melissa L. James Funding: Earth Mapping Resources Initiative 508 review and coordination: Maria R. Montour Data and metadata reviews: TBD Wyoming State Geological Survey roles and contributions Survey design and coordination: Ranie M. Lynds, Patricia M. Webber Contractor roles and contributions: Contractors: New-Sense Geophysics Ltd.; Merrick-Surdex Joint Venture, LLP Operations Manager: Chris Evans Field Lead: Joaquin Castruita Field Lead: Jesus de la Torre Field Lead: Anthony Maciel Field Lead: Nelson Larachea Pilot: Nick Heller Pilot: Camden Espeland Pilot: Brooke Walker Pilot: Miguel Barajas Pilot: Beau Crist Pilot: Bailey Hudson Data QA/QC: Chris Evans Data QA/QC: Emily Farquhart Data QA/QC: Lily Manoukian Data processing: Lily Manoukian Data processing: Emily Farquhart Data processing: Chris Evans Maps: Lily Manoukian Report: Chris Evans Report: Lily Manoukian

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