Zircon U-Pb geochronology and trace element dataset from the Southern Rocky Mountain Volcanic Field, Colorado, USA
J.T. Sliwinski,
M. Guillong,
P.W. Lipman,
M.J. Zimmerer,
C. Deering,
O. Bachmann
Affiliations
J.T. Sliwinski
Institute of Geochemistry and Petrology, ETH Zürich, Clausiusstrasse 25, Zürich 8092, Switzerland; School of Earth and Environmental Sciences, University of St. Andrews, Queen's Terrace KT16 9AJ, Scotland, UK; Corresponding author at: Institute of Geochemistry and Petrology, ETH Zürich, Clausiusstrasse 25, Zürich 8092, Switzerland.
M. Guillong
Institute of Geochemistry and Petrology, ETH Zürich, Clausiusstrasse 25, Zürich 8092, Switzerland
P.W. Lipman
Volcano Science Center, U.S. Geological Survey, Menlo Park, California 94025, USA
M.J. Zimmerer
New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
C. Deering
Department of Geological and Mining Engineering and Sciences, 630 Dow Environmental Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, USA
O. Bachmann
Institute of Geochemistry and Petrology, ETH Zürich, Clausiusstrasse 25, Zürich 8092, Switzerland
This contribution provides in-situ LA-ICP-MS U-Pb ages and trace element determinations of zircons from dacitic to rhyolitic lavas, ignimbrites and intrusions in the Southern Rocky Mountain Volcanic Field (SRMVF) in Colorado, USA. The data record a period of intense magmatic activity in the Oligocene-early Miocene (∼37–22 Ma) which gave rise to some of the largest explosive ignimbrites in the geological record (e.g. the Fish Canyon Tuff). Age data are drift corrected, but not corrected for radiation dosage or Th disequilibrium, in order to allow users to apply their own algorithms. Xenocrysts (much older crystals up to 2 Ga from the Proterozoic basement) are included in this record.
