{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Karen Lund", "hasEmail": "mailto:klund@usgs.gov"}, "description": "These data are for a multidisciplinary study of dikes, country rock, and alteration systems, Butte, U.S.A. Results of the study are described and interpreted in Lund and others (2018). Data included are U-Pb sensitive high-resolution ion microprobe (SHRIMP) geochronology for quartz porphyry dikes, 40Ar/39Ar thermochronologic data for biotite, hornblende, and K-feldspar from Butte granite country rock, and 40Ar/39Ar thermochronologic data for white mica and K-feldspar from alteration zones around lode veins. Also included are backscatter electron (BSE) and panchromatic cathodoluminescent (CL) imagery of minerals from samples dated by 40Ar/39Ar. 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.5ad91be4e4b0e2c2dd27a949.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5ad91be4e4b0e2c2dd27a949", "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:5ad91be4e4b0e2c2dd27a949", "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": "U-Pb SHRIMP and 40Ar/39Ar geochronologic data and backscatter electron (BSE) and panchromatic cathodoluminescent (CL) imagery of sample materials for study of dikes, country rock, and alteration systems, Butte, U.S.A."}