Data

This U.S. Geological Survey (USGS) data release accompanies planned publication 'Geophysical architecture and geochronology of the Neoarchean Mentor anorthosite intrusive complex, northwestern Minnesota: largest anorthosite complex of the Superior Province?'. The data release includes laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U-Pb zircon geochronology data...

This dataset includes 40Ar/39Ar data for 14 samples from the Sheep Creek carbonatite occurrence and other mineral systems in central and western Montana, USA. Samples were acquired from this area by Christopher Gammons and his students (Montana Technological University). Mineral separates of biotite and sericite from the samples were analyzed in the Denver Argon Geochronology Laboratory...

Rock physical property measurements were collected on core samples to help understand the causative sources of gravity and magnetic survey anomalies in northwestern Minnesota. A total of 410 measurements of magnetic susceptibility and density on Archean core samples from 20 boreholes have been conducted. The measurements aid in interpretation of gravity and airborne magnetic data that...

Stable isotope analyses are reported (the ratios deuterium/protium, carbon-13/carbon-12, oxygen-18/oxygen-16, sulfur-34/sulfur-32, nitrogen-15/nitrogen-14) for ores and related rocks, and mineral occurrences in sedimentary, igneous, and metamorphic rocks from Hicks Dome, Illinois; Clementine copper porphyry prospect, Boulder copper porphyry, and the Elkhorn Mining District, Montana; Pogo...

This dataset accompanies two proposed publications, "Descriptions and age constraints for new Jurassic flora fossils in west-central Sonora, Mexico: Results from U-Pb zircon geochronology, Sr-Nd isotopes, and megafossil taxa" and "Summary of Paleozoic and Mesozoic Rocks in Sonora and northern Sinaloa, Mexico", which will both report zircon SHRIMP-RG U-Pb ages and whole-rock isotope...

This dataset consists of three turbidite sandstone samples that were analyzed for U-Pb detrital zircon ages. The dataset accompanies the publication "An empirical test of Maximum Depositional Age through paired LA-ICP-MS and CA-ID-TIMS detrital zircon analysis: implications for the "Nevadan orogeny" in the Sierra Nevada foothills, California, U.S.A.", as well as planned future...

These data, modified from Horton and San Juan (2016), are a consolidation of point and polygon features representing mine and prospect-related symbols shown on U.S. Geological Survey (USGS) 7.5- and 15-minute topographic maps from the Historical Topographic Map Collection (HTMC). This consolidation supports more accurate counts of mine features represented in the database, which are...

Geochemical data included were generated as part of the Critical Minerals Mapping Initiative (CMMI). Individual samples are classified according to the Hofstra et al. (2021) CMMI deposit classification scheme. The goal of CMMI is to collaborate with Geoscience Australia and the Geological Survey of Canada to build a global database of critical minerals in a variety of ore deposits. The...

This dataset includes rock magnetic susceptibility and gamma ray spectrometry measurements from 204 outcrops in southwest Montana during 2025. The measurements were collected to understand the causative sources of airborne magnetic and radiometric survey anomalies in the Idaho-Montana porphyry belt. Sixteen magnetic susceptibility measurements were collected at each analyzed site using a...

This data release provides digital flight-line and gridded data for a high-resolution airborne magnetic and radiometric survey over Puerto Rico, the islands of Vieques and Culebra, and the surrounding shelf. The survey was acquired through funding from the USGS Earth Mapping Resource Initiative (Earth MRI), the USGS Coastal and Marine Resources and Hazards Program, and the USGS...

This data release provides digital flight-line and gridded data for a high-resolution airborne magnetic and radiometric survey over parts of Maryland, Pennsylvania, and West Virginia. The survey was acquired as part of the USGS Earth Mapping Resource Initiative (Earth MRI) to improve our understanding of the fundamental geologic framework of the region with applications to evaluating...

This data release provides digital flight-line and gridded data for a high-resolution airborne magnetic and radiometric survey over parts of central and northeastern Florida and southeastern Georgia. The survey was acquired as part of the USGS Earth Mapping Resource Initiative (Earth MRI) to improve our understanding of the fundamental geologic framework of the region with applications...