Ryan Frazer

In the Sawtooth Range of central Idaho. Idaho State University geology field camp, 2008.

Email: ryan.frazer at unc.edu
Office: Mitchell 224

B.A., Geology, Pomona College, 2009
M.S., Geological Sciences, University of North Carolina at Chapel Hill, current

I am a Master's student working with Drew Coleman on the Mount Givens Granodiorite of the central Sierra Nevada (see figure below). Using CA-ID-TIMS in the UNC Geochemistry Laboratory for U-Pb zircon geochronology and other isotope geochemistry, I am investigating possible similarities between this large, monotonous pluton and large volume (>500 km³) "supereruptions" such as the Fish Canyon Tuff.

In addition, I have been a graduate reseach consultant (GRC) for GEOL 301: Earth Materials (Mineralogy) and a teaching assistant for GEOL 101L: Introductory Geology Laboratory. I also work in Allen Glazner's XRF/XRD lab developing procedures and standards for assessing a variety of samples of interest, including: igneous rocks from basalts to aplites; soil samples; clays and pottery.

Outside the department, I spend my time cooking, brewing beer, obsessing over the Red Sox and baseball statistics, and playing kubb.

PAPERS

Frazer, R.E., Lackey, J.S., Bindeman, I.N., Loewy, S.L., in prep., Age and origin of the Dinkey Dome granites: punctuated emplacement of the Shaver Intrusive Suite, central Sierra Nevada.

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]

CONFERENCE ABSTRACTS

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 of the central Sierra Nevada batholith
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).