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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 the rates and mechanisms of pluton construction and are reevaluating the links between magmas trapped underground 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. In the Sierra Nevada, the glacially “cleaned” 3D exposure presents an opportunity to study the subvolcanic roots of a former continental arc.

Zircon U-Pb geochronologic data collected in the Department of Geological Sciences (Frazer et al., 2014).
Zircon U-Pb geochronologic data collected in the Department of Geological Sciences (Frazer et al., 2014).



*Indicates paper authored by student with Coleman as an advisor

Bartley, J.M., Glazner, A.F. and Coleman, D.S., 2018, Diking and deformation of granodiorite during growth of the Half Dome pluton, Yosemite National Park, California: resubmitted to Geosphere, v. 14, no. 3, doi:10.1130/GES01458.1.

Coleman, D.S., Mills, R.D. and Zimmerer, M.J, 2016, The pace of plutonism. Elements, v. 12, no. 2, p. 97-102, doi: 10.2113/gelements.12.2.97.

Rioux, M., Farmer, G.L., Bowring, S.A., Wooton, K.M., Amato, J.M., Coleman, D.S. and Verplanck, P.L., 2016, The link between volcanism and plutonism in epizonal magma systems; high‑precision U–Pb zircon geochronology from the Organ Mountains caldera and batholith, New Mexico, Contributions to Mineralogy and Petrology, v. 171, no. 13, DOI 10.1007/s00410-015-1208-6

*Frazer, R.E., Coleman, D.S., and Mills, R.D., 2014, Zircon U-Pb geochronology of the Mount Givens Granodiorite: Implications for the genesis of large volumes of eruptible magma: Journal of Geophysical Research, v. 119, no. 4, doi:10.1002/2013JB010716. [link]

*Mills, R.D., and Coleman, D.S., 2013, Temporal and chemical connections between plutons and ignimbrites from the Mount Princeton magmatic center: Contributions to Mineralogy and Petrology, v. 165, p. 961-980, doi:10.1007/s00410-012-0843-4. [link]

Coleman, D.S., Bartley, J.M., Glazner, A.F., and Pardue, M.A., 2012, Is chemical zonation in plutonic rocks driven by changes in source magma composition, or shallow crustal differentiation?: Geosphere, v. 8, no. 6, p. 1568–1587; doi:10.1130/GES00798.1. [link]

*Davis, J.W., Coleman, D.S., Gracely, J.T., Gaschnig, R., and Stearns, M., 2012, Magma accumulation rates and thermal histories of plutons of the Sierra Nevada batholith, CA: Contributions to Mineralogy and Petrology, v. 163, no. 3, p. 449-465, doi: 10.1007/s00410-011-0683-7. [link]

*Tappa, M.J., Coleman, D.S., Mills, R.D., and Samperton, K. M., 2011, The plutonic record of a silicic ignimbrite from the Latir volcanic field, New Mexico: Geochemistry, Geophysics, Geosystems, v. 12, no. 10, Q10011, doi: 10.1029/2011GC003700. [link]

*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. [link]

*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, doi: 10.1144/SP304.10. [link]

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, doi: 10.1130/G24496A.1. [link]

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, doi: 10.1130/G20220.1. [link]

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, doi: 10.1130/1052-5173(2004)0142.0.CO;2. [link]