{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Ian Hillenbrand", "hasEmail": "mailto:ihillenbrand@usgs.gov"}, "description": "This U.S. Geological Survey (USGS) data release includes whole-rock major, trace, and rare earth element geochemical data, whole-rock Nd-Pb-Sr isotopic data collected by thermal ionization mass spectrometry (TIMS), and zircon U-Pb isotopic data collected by laser ablation-inductively coupled mass spectrometry (LA-ICP-MS) methods. These data provide constraints on, and characterize, the composition and ages of crystalline basement rocks in the western United States, supporting geologic mapping and mineral systems analysis of critical mineral deposits.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P1YHZDWZ", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.6838c7abd4be025925747123.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_6838c7abd4be025925747123", "keyword": ["Arizona", "Black Ridge Canyons Wilderness", "California", "Colorado", "Colorado Front Range", "Colorado National Monument", "Death Valley", "Grand Canyon", "Gunnison uplift", "Laramie Range", "Needle Mountains", "New Mexico", "Picuris Mountains", "Proterozoic", "U.S. Geological Survey", "USGS:6838c7abd4be025925747123", "Unaweep Canyon", "Uncompahgre uplift", "Utah", "chemical analysis", "critical minerals", "geochemistry", "geochronology", "geoscientificInformation", "igneous rocks", "isotope geochemistry", "isotopic mapping", "metamorphic rocks", "rare earth elements"], "modified": "2025-09-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-117.3500, 35.3691, -105.1618, 41.0515", "theme": ["geospatial"], "title": "Geochemical, Geochronologic, and Isotopic Data for Proterozoic rocks from Arizona, California, Colorado, New Mexico, and Utah"}