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Field Director 2017 – Dr. Joel Des Ormeau

My research interests involve large-scale tectonic processes, the timing of crystallization of igneous and metamorphic minerals, and thermodynamic modeling of P-T conditions experienced by various metamorphic mineral assemblages. In particular, I utilize coupled thermal ionization mass spectrometry (TIMS) and high-spatial resolution laser ablation-ICP-MS U-Pb zircon dating techniques to determine the timing and duration of eclogite-facies metamorphism associated with the world’s youngest known ultrahigh-pressure (UHP) terrane in Papua New Guinea and one of the largest UHP terranes exposed in western Norway. This approach has shed light on the short sub-million year timescales of peak metamorphism and subsequent retrogression and provides crucial information about geodynamic processes operating during the switch from subduction to exhumation of continental material from the mantle through to the Earth’s surface.

My research also focuses on detailed electron microprobe work to characterize eclogites from PNG for phase-diagram modeling to determine a more detailed pressure–temperature–time path across the PNG UHP terrane. During my dissertation work at the University of Nevada, Reno, I performed fieldwork in remote islands of Papua New Guinea and along the western coast of Norway. I have been associated with field camp at UNR since 2013 as both a teaching assistant and course instructor. I currently manage the Mackay School of Earth Science and Engineering Microbeam Laboratory.

Ryan Anderson, Ph.D. Candidate

I obtained a M.S. in Geology from UNR in 2013, advised by Dr. Jim Faulds, and I am currently a PhD candidate at Washington State University, advised by Dr. Sean Long. I have been involved with the University of Nevada Reno field camp since 2013. I have two main areas of research interest. 1) The structural evolution of continental crust, both extensional and contractional, and the orogenic models that predict their behavior. 2) The structural controls of hydrothermal fluids, mainly in amagmatic settings within the Basin and Range of the Western U.S.

My main approach is detailed geologic mapping coupled with construction of balanced and restored cross-sections, apatite and zircon thermochronology, geochronology, and peak temperature data using RSCM (Raman spectroscopy on carbonaceous material). My current work is focused on the kinematics, geometry, minimum shortening estimates, and timing of the Andean fold-thrust belt in southeastern Bolivia. The focus of my master thesis was characterizing the structural controls of a "blind" (or hidden) geothermal system on the Pyramid Lake Paiute Tribe Reservation in northwest Nevada.

Dr. Rich D. Koehler

Dr. Koehler is an Assistant Professor at the Nevada Bureau of Mines and Geology and the Department of Geological Sciences and Engineering at the University of Nevada Reno. His research is focused on earthquake geology, Quaternary geology, paleoseismology, geomorphology, and engineering geology. Dr. Koehler is specialized in using advanced techniques including air photo, lidar, and satellite imagery interpretation, Quaternary geologic and geomorphic mapping, and surveying to assess geohazards in a wide variety of terrains. Dr. Koehler is particularly well versed on topics in Quaternary Geology in Nevada and has mapped in numerous valleys throughout the state. His paleoseismic research has been funded by the U.S. Geological Survey and the National Science Foundation throughout the western U.S. including faults in California, New Mexico, Washington, Alaska, and Nevada. His international project experience includes studies in Turkey, Taiwan, Jamaica, and Haiti.

Tom Anderson

Dr. Tom Anderson

Tom Anderson is a sedimentary petrologist/stratigrapher with research interests in Cambrian microbial reefs. His research goals are to document the nature of early reefs, determine the environments in which they thrived, and apply these studies to the early Paleozoic evolution of western North America. He has taught field geology in the Great Basin for forty years including three years at the University of Nevada, Reno field camp. He has also studied Paleogene turbidites on the Gualala Block in northern California.

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