Filters: Tags: Radiometric Dating (X) > Extensions: ArcGIS Service Definition (X)

Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types ArcGIS REST Map Service (2) ArcGIS Service Definition (2) Downloadable (2) Map Service (2) Contacts Michael A Cosca Karen Lund Leah E Morgan U.S. Geological Survey - ScienceBase Amy K Gilmer More... Categories Data (2) Tag Types Theme (2) Place (1) Harvest Set (2) USGS Scientific Topic Keyword (1) Tag Schemes None (1) Geochronology (1) USGS Thesaurus (1) Common geographic areas (1) ISO 19115 Topic Category (2) View Results as: JSON ATOM CSV

USGS Geochron: A Database of Geochronological and Thermochronological Dates and Data (ver. 2.0, September 2023) USGS Geochron is a database of geochronological and thermochronological dates and data. The data set contains published ages, dates, analytical information, sample metadata including location, and source citations. The following analytical techniques are represented in the data set: 40Ar/39Ar, K-Ar, U-Th-Pb, Sm-Nd, Rb-Sr, Lu-Hf, fission track, luminescence, U-series in situ, (U-Th)/He, and Re-Os. This data set incorporates data previously hosted in the National Geochronological Database (Sloan and others, 2003), as well as data from published journal articles and ScienceBase data releases. These data are primarily from the United States, but data from other parts of the world are also included. First posted January... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: (U-Th)/He, 40Ar/39Ar, Fission track, Geochronology, Geochronology, All tags... K-Ar, Lu-Hf, Optically stimulated luminescence, Radiometric dating, Re-Os, Sm-Nd, Thermochronology, U-Th-Pb, U-series, USGS Science Data Catalog (SDC), geoscientificInformation, Fewer tags 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. 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 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 for interpretive report: Lund, K., McAleer, R.J., Aleinikoff,... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: 40Ar/39Ar geochronology, 40Ar/39Ar geochronology, Ag-polymetallic lodes, BSC, Butte, All tags... CL, Cu lodes, GGGSC, Geology, Geophysics, and Geochemistry Science Center, MRP, Mineral Resources Program, Mineralogy, Montana, SHRIMP, SHRIMP, Sensitive high-resolution ion microprobe, Structural Geology, U-Pb geochronology, U-Pb geochronology, USGS Science Data Catalog (SDC), United States, alteration, backscatter electron, copper, economic geology, geochronology, geoscientificInformation, molybdenum, panchromatic cathodoluminescent, quartz porphyry dikes, radiometric dating, silver, Fewer tags