In the Sawtooth Range of central Idaho. Idaho State University geology field camp, 2008.
Email: ryan.frazer at unc.edu
Office: Mitchell Hall 304
B.A., Geology, Pomona College, 2009
M.S., Geological Sciences, University of North Carolina at Chapel Hill, 2013
Ph.D., Geological Sciences, University of North Carolina at Chapel Hill, current
I am a Ph.D candidate working with Drew Coleman on understanding the timescales of magmatic processes, specifically in relation to supervolcano eruptions. I use CA-ID-TIMS in the UNC Isotope Geochemistry Laboratory for U-Pb zircon geochronology and other isotope geochemistry. For my Master's, I investigated possible similarities between the large, monotonous Mount Givens Granodiorite in the Sierra Nevada and large volume (>500 km3) supereruptions such as the Fish Canyon Tuff in Colorado. I am currently investigating the use of zircon U-Pb geochronology combined with titanite U-Pb dating to understand the timescales over which plutonic rocks exist in a magma mush state after intrusion, which has direct bearing on how long magmas may be eruptible.
I am currently a Teaching Assistant for GEOL 301: Earth's Materials (Mineralogy) and a Graduate Research Consultant for GEOL 72H: Field Geology of Eastern California. I have previously been a Research Assistant in both of Drew Coleman's TIMS laboratories and Allen Glazner's SEM and XRF/XRD labs. I have also been an instructor for GEOL 301 and for GEOL 190: Special Topics in Geological Sciences. I have been a Teaching Assistant for GEOL 404: Petrology and Plate Tectonics, GEOL 301 (three times), and GEOL 101L: Introductory Geology Laboratory. I have been a GRC for GEOL 301 and GEOL 72H previously (see a blog post I wrote about the class here).
See my Google Scholar page here.
Frazer, R.E., Coleman, D.S., 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: Solid Earth, v. 119, no. 4, p. 2907-2924, doi:10.1002/2013JB010716. [link]
Lackey, J.S., Cecil, M.R., Windham, C.J., Frazer, R.E., Bindeman, I.N., Gehrels, G.E., 2012, The Fine Gold Intrusive Suite: The roles of basement terranes and magma source development in the Early Cretaceous Sierra Nevada batholith: Geosphere, v. 8, no. 2, p. 292-313, doi:10.1130/GES00745.1. [link]
Frazer, R.E., Mills, R.D., Coleman, D.S., 2013, Can a supervolcano eruption eradicate existing zircon?: Geological Society of America Abstracts with Programs, v. 45, no. 7. [link]
Coleman, D.S., Frazer, R.E., Mills, R.D., Glazner, A.F., Bartley, J.M., 2013, Plutons are texturally modified primary igneous liquids, not cumulates: Mineralogical Magazine, v. 77, no. 5, p. 904. [link]
Mills, R.D., Coleman, D.S., Frazer, R.E., Glazner, A.F., Tappa, M.J., 2012, The general lack of igneous rocks with cumulate chemical signatures: is there an elephant in the room?: Abstract V43D-2893, presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-9 Dec. [link]
Frazer, R.E., Mills, R.D., Coleman, D.S., 2012, The contrasting age ranges of large plutons and monotonous intermediates: Geological Society of America Abstracts with Programs, v. 44, no. 7, p. 322. [link]
Beck, C.L., Bartley, J.M., Frazer, R.E., Coleman, D.S., Glazner, A.F., 2012, New insights into migration of the Cretaceous Sierran arc using high-precision U/Pb zircon geochronology: Geological Society of America Abstracts with Programs, v. 44, no. 7, p. 490. [link]
Frazer, R.E., Coleman, D.S., 2011, High-precision U-Pb CA-TIMS geochronology of the Mount Givens Granodiorite, central Sierra Nevada, California: insights into granodiorite emplacement, Abstract V21C-2507, presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec. [link]
Beck, C.L., Frazer, R.E., Coleman, D.S., 2011, Evaluation of west-east migration in the Cretaceous Sierra Nevada batholith, Abstract V21D-2527, presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec. [link]
Lackey, J.S., Cecil, M.R., Windham, C.J., Frazer, R.E., Bindeman, I.N., Gehrels, G.E., 2010, Igniting the Sierran arc: evolving oxygen and hafnium isotope ratios in the Bass Lake Tonalite: Geological Society of America Abstracts with Programs, v. 42, no. 4, p. 110. [link]
Frazer, R.E., Lackey, J.S., Valencia, V.A., 2009, New U-Pb zircon ages of the granites of Dinkey Dome: reexamining the origins of the Shaver Intrusive Suite: Geological Society of America Abstracts with Programs, v. 41, no. 5, p. 14. [link]
2015 Geological Society of America John A. Black Award (to support field-based research in volcanology) [link]
2009 Richard E. Strehle Memorial Award (for excellence in field geology)
2008 Donald Zenger Award (for academic excellence in geology)