{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Karen Lund", "hasEmail": "mailto:klund@usgs.gov"}, "description": "These 40Ar/39Ar thermochronologic data for white mica and K-feldspar from alteration zones around lode veins are for the study of the Butte mining district, U.S.A. Results of the study are described and interpreted in Lund and others (2018). These data are shared to meet open data requirements.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9F872I5", "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.5ba1de64e4b08583a5c43656.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5ba1de64e4b08583a5c43656", "keyword": ["40Ar/39Ar geochronology", "Ag-polymetallic lodes", "BSE", "Butte", "CL", "Cu lodes", "GGGSC", "Geology, Geophysics, and Geochemistry Science Center", "MRP", "Mineral Resources Program", "Montana", "SHRIMP", "U-Pb geochronology", "USGS:5ba1de64e4b08583a5c43656", "United States", "alteration", "backscatter electron", "copper", "economic geology", "geochronology", "geoscientificInformation", "molybdenum", "panchromatic cathodoluminescent", "quartz porphyry dikes", "radiometric dating", "sensitive high-resolution ion microprobe", "silver", "zinc"], "modified": "2020-09-29T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-112.5942, 45.9221, -112.4159, 46.0629", "theme": ["geospatial"], "title": "40Ar/39Ar geochronologic data for study of alteration systems, Butte, U.S.A."}