In the Sawtooth Range of central Idaho. Idaho State University geology field camp, 2008.
Email: ryan.frazer at unc.edu
Office: Mitchell 327
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 student working with Drew Coleman on understanding the timescales of magmatic processes, specifically in relation to "supervolcano" eruptions, using CA-ID-TIMS in the UNC 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 (see figure below) and large volume (>500 km3) supereruptions such as the Fish Canyon Tuff in Colorado.
I have been a Teaching Assistant for GEOL404: Petrology and Plate Tectonics, GEOL 301: Earth Materials (Mineralogy) and GEOL101L: Introductory Geology Laboratory. I have also been a Graduate Research Consultant (GRC) for GEOL301 and GEOL 72H: Field Geology of Eastern California (see a blog post about the class here). I also work in Allen Glazner's XRF/XRD lab developing procedures and standards for assessing compositions of a variety of samples of interest, including igneous rocks from basalts to aplites, soil samples, and clays and pottery.
See my Google Scholar page here.
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. [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.
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]
General geologic map highlighting major intrusive groups in the central Sierra
Nevada, California. Inset shows study location; CA - California; LA - Los Angeles; SF
- San Francisco. Map after Bateman (1992), Cruden et al. (1999), Coleman et al.
(2004) and Lackey et al. (2008).