Filters: Tags: caldera (X) > Categories: Data Release - In Progress (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Geosciences and Environmental Change Science Center Amy K Gilmer Ren A Thompson Jorge A Vazquez U.S. Geological Survey More... Categories Data (1) Tag Types Place (1) Theme (1) Tag Schemes Geographic Names Information System (1) USGS Thesaurus (1) View Results as: JSON ATOM CSV

Petrologic data for 'Postcaldera intrusive magmatism at the Platoro caldera complex, Southern Rocky Mountains Volcanic Field, Colorado' The dataset includes whole-rock geochemistry, phenocryst/mineral trace element compositions, zircon U–Pb geochronology, and zircon in situ Lu–Hf isotopes for intrusions associated with the Oligocene Platoro caldera complex of the San Juan volcanic locus in Colorado features numerous exposed plutons, both within the caldera and outside its margins, enabling investigation of the timing and evolution of postcaldera magmatism. Intrusion and , coupled with new document distinct pulses of magma derived from different depths beneath the caldera complex. Fourteen intrusions, the Chiquito Peak Tuff, and the dacite of Fisher Gulch were dated, showing intrusive magmatism began after the 28.8 Ma-eruption of the Chiquito Peak... Categories: Data, Data Release - In Progress; Tags: Conejos County, Jasper, Platoro, Rio Grande County, Summitville, All tags... caldera, geochronology, intrusions, magmatism, Fewer tags