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个人简介
I am an igneous petrologist/geochemist, focusing largely on mafic-ultramafic rocks, with major interests in tectonics, convergent margin systems, and mantle plumes. I have carried out research in the Alps, the Appalachians, the Hindu Kush/Karakoram, the Caucasus, the Pyrenees, and the western Cordillera of North America. This involved work on ophiolites, alpine peridotite massifs, subduction accretionary complexes, island arc volcanism, continental volcanics, high-pressure metamorphic rocks, and Proterozoic basement complexes, including my dissertation project in the Ivrea zone of the western Italian Alps. I also worked on lunar highland crust and mare volcanics for over a decade, funded by the NASA Planetary Science program. I have spent over 25 years working on continental volcanic rocks of the Snake River Plain. From 2009 to 2013 I was the Principal Investigator and Project Director for Project Hotspot, which drilled three deep (2 km) core holes in the Snake River Volcanic Province, along the track of the Yellowstone hotspot mantle plume. This $7.4M project, funded by the Department of Energy, the International Continental Drilling Program, and the US Air Force, had two goals: understanding volcanic and tectonic processes associated with mantle plumes under continental crust, and testing innovative approaches to geothermal energy exploration. This project led to our most recent effort, the Snake River Plain Geothermal Play Fairway Analysis project, funded by the Department of Energy ($3.2M). This project involves 10 PI’s from other universities, Federal Agencies, and private enterprise. Most recently, I participated in three IODP (International Ocean Discovery Program) expeditions: two to the Izu-Bonin-Mariana arc system and one to the South Atlantic, all on the drillship JOIDES Resolution. Expedition 352 (2014) looked at infant arc volcanism in the Izu-Bonin arc segment to study subduction initiation along an oceanic transform fault. Expedition 366 (2016) cored serpentine mud volcanoes in the Mariana fore-arc, which sample the underlying crust and mantle. Expedition 391/397T focuses on the Walvis Ridge Hotspot and its relation to the Etendeka Large Igneous Province. All three expeditions involved two months at sea working as part of an international team of up to 30 scientists. Work on these samples is continuing, funded by NSF-OCE.
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Geological Society of America Bulletin (2024)
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Proceedings of the International Ocean Discovery Program (2023)
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John Shervais, Katherine Potter
Goldschmidt2023 abstracts (2023)
William W. Sager,Kaj Hoernle, T.W. Höfig, Aaron Avery,Rajneesh Bhutani,David M. Buchs, C. Carvallo, C. Class,Yeling Dai, Giacomo Dalla Valle, A.V. Del Gaudio, Stuart Fielding,
Proceedings of the International Ocean Discovery Program (2023)
William W. Sager,Kaj Hoernle, T.W. Höfig, Aaron Avery,Rajneesh Bhutani,David M. Buchs, C. Carvallo, C. Class,Yeling Dai, Giacomo Dalla Valle, A.V. Del Gaudio, Stuart Fielding,
Proceedings of the International Ocean Discovery Program (2023)
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William W. Sager,Kaj Hoernle, T.W. Höfig, Aaron Avery,Rajneesh Bhutani,David M. Buchs, C. Carvallo, C. Class,Yeling Dai, Giacomo Dalla Valle, A.V. Del Gaudio, Stuart Fielding,
Proceedings of the International Ocean Discovery Program (2023)
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