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 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 Research Assistant working in both Drew Coleman's TIMS laboratories and Allen Glazner's SEM lab. I have previously been the instructor-of-record for GEOL 301: Earth's Materials (Mineralogy) and for GEOL 190: Special Topics in Geological Sciences. I have also been a Teaching Assistant for GEOL 404: Petrology and Plate Tectonics, GEOL 301, and GEOL 101L: Introductory Geology Laboratory. I have been a Graduate Research Consultant (GRC) for GEOL 301 and GEOL 72H: Field Geology of Eastern California (see a blog post I wrote about the class here). I have also worked in Allen Glazner's XRF/XRD lab developing procedures and standards for assessing compositions of materials including igneous rocks from basalts to aplites, soil samples, clays and pottery.
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]