subvolcanic magma accumulation rates and links between plutonic and volcanic rocks
The rates of magma accumulation in plutons and links between plutonic and volcanic rocks. Work here is focused on 1) the Southern Rocky Mountain Volcanic field of Colorado and New Mexico in collaboration with Bill McIntosh (New Mexico Tech) and Peter Lipman (Emeritus USGS), and 2) the Sierra Nevada batholith of California in collaboration with Allen Glazner (UNC) and John Bartley (University of Utah). We are trying to understand how fast and how plutons are constructed and are reevaluation the links between magmas trapped underground and preserved as plutonic rocks and those that erupt as volcanic rocks. The Southern Rockies provide a chance to study volcanic rocks and their related shallow intrusive rocks exposed along the flanks of the Rio Grande Rift. The sierras present the opportunity for glacially “cleaned” 3D exposure of the subvolcanic roots of a continental arc.
Recent Publications
Mills, R. D., Glazner, A. F., and Coleman, D. S., 2009, Scale of pluton/wall rock interaction near May Lake, Yosemite National Park, California, USA: Contributions to Mineralogy and Petrology, v. 158, p. 263-281, DOI 10.1007/s00410-009-0381-x.
Gray, W., Glazner, A. F., Coleman, D. S. and Bartley, J. M., 2008, Long-term geochemical variability of the Late Cretaceous Tuolumne Intrusive Suite, Central Sierra Nevada, California, Annen, C. and Zelmer, G. F., eds. Dynamics of Crustal Magma Transfer, Storage and Differentiation: Geological Society of London, Special Publication, v. 304, p. 183-202.
Bartley, J. M., Coleman, D. S. and Glazner, A. F., 2008, Incremental emplacement of granitic plutons by magmatic crack-seal: Transactions of the Royal Society of Edinburgh,v. 97, no. 4, p. 383-396.
Glazner. A.F., Coleman, D. S. and Bartley, J.M., 2008, The tenuous connection between high-silica rhyolites and granodiorite plutons. Geology, v. 36, no. 2, p. 183-186.
Coleman, D. S., Gray, W., and Glazner, A. F., 2004, Rethinking the emplacement and evolution of zoned plutons: geochronologic evidence for incremental assembly of the Tuolumne Intrusive Suite, California: Geology, v. 32 no. 5, p. 433-436.
Glazner, A. F., Bartley, J. M., Coleman, D. S., Gray, W. M. and Taylor, R. Z., 2004, Are plutons assembled over millions of years by amalgamation from small magma chambers?: Geological Society of America Today, v. 14, no. 4/5, p. 4-11.
Drew Coleman
Rates of zircon transport in the modern Amazon River
Cretaceous time scale geochronology
Forensic geology and geoarchaeology
· subvolcanic magma accumulation rates and links between plutonic and volcanic rocks
· rates of zircon transport in the modern Amazon River
· Cretaceous time scale geochronology
· forensic geology and geoarchaeology
Students discussing smoking Halemaumau crater with HVO geologist Frank Truesdell, Duke/UNC Hawaii field trip, March 2009.