This review article presents a global compilation of abyssal peridotite compositions, demonstrating that their compositions reflect a combination of melting, melt-rock interaction and source heterogeneity. This article is open access. Warren, J.M., 2016. Global variations in abyssal peridotite compositions, Lithos, 248-251, 193-219, doi:10.1016/j.lithos.2015.12.023.
Megan D’Errico’s paper on the geochemistry of peridotites from the Arctic Ocean has been published in Geochimica et Cosmochimica Acta. Based on modeling of peridotite compositions, we show that the presence of refractory harzburgites and thin overlying oceanic crust are best explained by low degrees of melting of a previously melted, heterogeneous mantle. D’Errico, M.E., […]
This review article on Re-Os-Pb isotopes in mantle sulfides has been published following the Reviews in Mineralogy and Geochemistry short course on Highly Siderophile and Strongly Chalcophile Elements. This article is open access. Harvey, J., J.M. Warren and S.B. Shirey, 2016. Mantle sulfides and their role in Re-Os-Pb isotope geochronology, Reviews in Mineralogy and Geochemistry, […]
The Mantle Processes Group has moved to the Department of Geological Sciences in the College of Earth, Ocean and Environment at the University of Delaware. Positions are available for students and postdocs. Contact Jessica Warren (warrenj at udel dot edu) for more information.
We returned to the Josephine Peridotite for more sampling of mantle shear zones. In addition to graduate students Nik Deems and Katie Kumamoto, Stanford undergraduate EKela Autry joined us to get data for her summer project. We were also joined by Eric Mittelstaedt and Kate Kaminski from the University of Idaho for Kate’s project on […]
Arjun Kohli successfully defended his thesis, “Micromechanical Controls on Brittle to Plastic Fault Zone Deformation”. Congratulations Dr. Kohli!
Josie Nevitt successfully defended her PhD thesis, “Fault-Related Deformation Within the Brittle-Ductile Transition: Field Observations, Microsctructural Analysis and Mechanical Modeling”. Congratulations Dr. Nevitt!
This September we returned to the Trinity Ophiolite in Northern California for a Stanford field class (GES 190: Advanced Field Methods). Read the student blog for the class here. We were joined by lab descendent Philomena Gan from Oxford University, who is a student with former lab member Lars Hansen.
Three days of sampling in the Josephine Peridotite were not to be this June.
To see out the academic year, we took a lab trip to the Exploratorium in SF. While simulated fog didn’t hold much appeal, shadow images, kaleidoscopes, geysers, heat sensors and cow eyeballs provided wholesome scientific diversion from pressing questions about mantle processes.