Hannah Y. Schroeder, PhD student, Archean metamorphism and tectonics
Hannah joined the group in 2022. She finished her undergraduate major in Geology and Environmental Sciences, where she did a senior thesis studying the organization of leucosome networks in migmatites from the Pioneer Metamorphic Core Complex of Idaho. At UM, Hannah is researching the timescales and drivers of Archean metamorphism in the English River Subprovince of the Superior Province in Canada.
Julisan D. Street, PhD student, granulite metamorphism and crustal melting
Julisan started her PhD in Fall of 2021. She finished her undergraduate major in Geology and minor in Anthropology & Sociology at Lafayette College, where she worked on a senior thesis studying the origin of Jamaican adakite volcanism as a possible analog for Archean magmatic process. At UM, Julisan is researching the causes of high-temperature metamorphism and crustal melting in the Paleoproterozoic Mojave Province of the southwest USA.
Yiruo Xu, PhD student, Archean metamorphism and tectonics
Yiruo started her PhD in Fall 2021. She completed her undergraduate degree in Geology and Economics at Vanderbilt University, where she worked on a senior thesis evaluating the source of Paleozoic volcanic ashes (K-bentonites) in the eastern USA and using Ce anomalies in zircon to estimate the oxygen fugacity of their magmas prior to eruption. At UM, Yiruo is researching the timescales and drivers of Archean metamorphism and magmatism in the Minnesota River Valley and Quetico Subprovinces of the Superior Province in the USA and Canada.
David Hernández-Uribe, former postdoc; subduction metamorphism, intermediate-depth seismicity, slab melting
Assistant Professor at the University of Illinois, Chicago. David worked in the group as a postdoc from 2020 to 2022 and is still an active research collaborator. He completed his PhD at the Colorado School of Mines, his MS at Central Washington University, and his BS at la Universidad Nacional Autónoma de México. He is broadly interested in subduction zone processes. His previous projects have focused on the formation and exhumation of ultrahigh-pressure metamorphic rocks, flat-slab subduction in SW USA, volatile cycling between the crust and mantle, intermediate-depth seismicity, and the scenarios that lead to slab melting. He has worked with rocks from China, Mexico, USA, and Guatemala in addition to theoretical modeling of metamorphic phase equilibria in subducting slabs. As a postdoc at UM, he conducted theoretical modeling of phase changes in subducting slabs as they relate to deep seismicity, slab melting, volatile recycling, and arc magmatism.
Robert M. Holder, Assistant Professor
Robert started at the University of Michigan in July 2020 after finishing a postdoc at Johns Hopkins University with Daniel Viete, MS+PhD at UC Santa Barbara with Brad Hacker, and BA at Gustavus Adolphus College (Geology & Scandinavian Studies). He is interested in the evolution of ancient mountain belts and how Earth’s fundamental tectonic processes have changed through time. His work has primarily focused on the metamorphic rock record (specifically, the metamorphic records crustal melting and subduction), but also touches on traditional igneous and sedimentary processes. He uses a variety of laboratory techniques, but is most known for his application of U–Pb petrochronology by LA-ICP-MS. He has worked in (alphabetical order) Antarctica, Austria, Canada, Czech Republic, Madagascar, Mexico, Norway, Shetland, and the USA.