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 and sources of magmatic processes, specifically in relation to supervolcano eruptions. I use ID-TIMS in the UNC Isotope Geochemistry Laboratory for U-Pb zircon geochronology and whole rock Sr, Nd, and Pb 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, using a combination of U-Pb zircon geochronology and modeling of zircon behavior in magma. I am currently investigating the significance of atypical Sr, Nd, and Pb isotopic compositions of high-silica granitic rocks in the Sierra Nevada batholith, CA and rhyolites and granites in the Grizzly Peak magmatic system, CO to understand crustal growth rates and tectonics. I also use a variety of other tools, including oxygen isotopes in zircon, rare earth elements, and modeling the effects of magma system behaviors on minerals of interest, to understand the igneous rock record.
I have 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 the Instructor of Record for GEOL 301 (Earth's Materials: Mineralogy) and for GEOL 190: Special Topics in Geological Sciences. I have been a Teaching Assistant for GEOL 404 (twice), GEOL 301 (three times), and GEOL 101L: Introductory Geology Laboratory. I have been a Graduate Research Consultant for GEOL 301 and GEOL 72H previously (see a blog post I wrote about the experience 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]
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)
Frazer, R.E., Lackey, J.S., 2016, Crustal Recycling and Isotopic Diversity in the Shaver Intrusive Suite, Central Sierra Nevada, CA, v. 48, no. 4. [link]
Frazer, R.E., Gaynor, S.P., Coleman, D.S., 2016, Implications of a 102 Ma Alabama Hills Granite for Dextral Offset in Owens Valley, CA and the Organization of Sierran Magmatism: GSA Abstracts with Programs, v. 48, no. 4. [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]