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Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (2) OGC WFS Layer (2) OGC WMS Service (2) Contacts Ryan J McAleer Ryan McAleer Robert P Wintsch Florence Bascom Geoscience Center Michael J Kunk More... Categories Data (2) Tag Types Theme (2) Place (2) Harvest Set (2) USGS Scientific Topic Keyword (1) Tag Schemes none (1) None (1) USGS Thesaurus (1) ISO 19115 Topic Category (2) View Results as: JSON ATOM CSV

40Ar/39Ar isotopic data from the Day Nui Con Voi metamorphic massif, Vietnam This data release includes electron 40Ar/39Ar collected at the U.S. Geological Survey for samples from the Day Nui Con Voi metamorphic massif, Vietnam. Rock samples were collected by Meng-Wan Yeh, Michael J. Kunk and Robert P Wintsch in 2011. Mineral separates were prepared and aliquots of amphibole, muscovite, phlogopite, biotite, and potassium feldspar were analyzed by the 40Ar/39Ar method at the U.S. Geological Survey Bascom ARgon Dating (BARD) Laboratory in Reston, Virginia. The 40Ar/39Ar data constrain the timing of exhumation of rocks within the massif. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 40Ar/39Ar, Bascom Argon Dating Laboratory, FBGC, Geochemistry, Geochronology, All tags... Himalaya, Indochina, Structural Geology, Tectonics, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Vietnam, geoscientificInformation, Fewer tags Electron microprobe and 40Ar/39Ar isotopic data from west-central New Hampshire This dataset accompanies planned publication 'Unmixing multiple metamorphic muscovite age populations with powder X-ray diffraction and 40Ar/39Ar analysis'. The 40Ar/39Ar and electron microprobe data are from samples adjacent to a lower greenschist facies shear zone in western New Hampshire. The geochronology coupled with the electron microprobe data provide a petrochronologic framework for the rocks studied in the manuscript. Sample collection was supervised by Ryan McAleer, Gregory Walsh, and Peter Valley of the USGS. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 40Ar/39Ar, Claremont, New Hampshire, FBGC, Florence Bascom Geoscience Center, NCGMP, All tags... National Cooperative Geologic Mapping Program, New Hampshire, Petrochronology, Reston Argon Geochronology Laboratory, Reston Electron Microbeam Laboratory, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), geochronology, geoscientificInformation, mass spectroscopy, radiometric dating, Fewer tags