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Van Tuyl Lecture: Brendan Hanger, CSM Geology and Geological Engineering
November 11, 2021 @ 4:00 pm - 5:00 pm
Brendan Hanger, Colorado School of Mines Geology & Geological Engineering
Thursday, November 11, 2021, 4PM, BE 241
Topic: The Story of One Garnet: Mantle Redox, Metasomatism and Kimberlite Ascent
Abstract: Due to ability to host Fe in multiple valence states, garnet in peridotite allows us to explore the redox state of the mantle at high resolution. This talk will explain how one single garnet crystal was able to document the redox conditions, metasomatic history and eruption timing for the Wesselton kimberlite in South Africa. Electron microprobe and LA-ICP-MS analyses were used in conjunction with synchrotron X-ray Absorption Near-Edge Structure (XANES) spectroscopy and NanoSIMS to measure major and trace elements, Fe speciation and quantify diffusion time frames, all of which allowed an extremely detailed investigation of the history of the cratonic mantle.
The Van Tuyl lectures will be at 4-5pm in BE 241 and after the lecture there’ll will be a get-together from 5-6pm in BE 243 with pizza and sodas.