Dr. Tikoo Talk<\/a><\/p>\nThursday, October 8, 2020<\/h3>\n
Dr. John Eichelberger
\nTitle: Drilling to Magma
\nHost: Cameron
\nAbstract: John Eichelberger (MIT, Stanford) holds a career-long passion for scientific drilling of volcanoes. He began with volcanology related to geothermal energy at Sandia and Los Alamos National Laboratories, transitioning to volcano hazards as Professor at the University of Alaska Fairbanks (UAF) and then Coordinator of USGS Volcano Hazards Program. Later he served as Dean of the Graduate School at UAF and VP Academic of UArctic. International collaboration has been his central theme, especially with Russia, joined to Alaska by volcanoes and history. He received the Sergei Soloviev Prize in natural hazards from EGU in 2015. John\u2019s enthusiasm for scientific drilling began at Kilauea Iki lava lake, coring into the molten interior as part of Sandia\u2019s Magma Energy Project. \u00a0John will present his research on magma drilling to interested universities and events. \u00a0Geosciences provide a long history of surprises when some thought the big discoveries were over. \u00a0John proposes that drilling to magma will provide another game-changing surprise. \u00a0Is it possible to drill to magma? Yes! It has been done many times, but only by accident. Should we do it intentionally? Yes, to understand how continental crust evolves, how to use heat of crystallization coupled with thermal cracking as an energy source, and how to forecast eruptions from direct measurements in magma. \u00a0John’s lecture will trace the progression from coring lava lakes, through shifts in thinking about magma bodies, to exciting data from drilling encounters with real magma and describe what the future holds in drilling to this scientific frontier.<\/p>\n
Thursday, October 15, 2020<\/h3>\n
Loretta Kwong, Arcadis
\nTitle: Environmental Consulting: From Field Geologist to Project Manager
\nHost: Paradis<\/p>\n
Thursday, October 22, 2020<\/h3>\n
Dr. Daniel Holm, Kent State
\nTitle: Growth, overprinting, and stabilization of Proterozoic Provinces in the upper Great Lakes region (but mostly Wisconsin!)
\n<\/strong>
\nAbstract: New geochronologic data in the southern Lake Superior region provide key information on the timing and nature of tectonic activity that pre-and post-date initial Paleoproterozoic growth of Laurentia during the geon 18 Penokean orogeny. The obducted Pembine ophiolite formed along the edge of a Paleoproterozoic ocean basin at least 30 m.y. prior to Penokean island arc\/microcontinent accretion beginning at 1860 Ma. Following Penokean orogenesis, intrusion of mafic dikes at 1817 \u00b1 2 Ma indicate a period of extension that coincided with a 30 m.y. gap in orogenic felsic magmatism at 1835-1805 Ma (between the Penokean and Yavapai orogenies) and likely represents relaxation of Penokean compression and a tectonic switch to intra-arc extension related to initiation of Yavapai subduction. Subsequent Yavapai arc accretion (1750-1720 Ma) resulted in pervasive ductile deformation of the dikes and host rocks at temperatures of ~700 \u00b0C, previously attributed to Penokean deformation. Geon 16 Mazatzal overprinting of the accreted Penokean and Yavapai provinces was widespread but of overall lower metamorphic grade (greenschist facies), and the thermal effects of the 1476-1470 Ma shallow level Wolf River batholith was limited to a 10-15 km wide contact zone surrounding the intrusion.<\/p>\nIn contrast to the Archean Superior Province to the north, Paleoproterozoic terranes in the southern Lake Superior area experienced widespread low-temperature reheating and cooling of shallow crustal levels at ca. 1.1-1.0 Ga attributed primarily to magmatic underplating with little subsequent Neoproterozoic exhumation. In the southern Lake Superior region widespread magmatic underplating likely thickened, strengthened, and stabilized Proterozoic Penokean-Mazatzal lithosphere but destabilized Archean cratonized Superior Province lithosphere to the north.
\nHost: Czeck<\/p>\n
Thursday, October 29, 2020<\/h3>\n
Dr. Lindsay McHenry, 51ÁÔÆæ
\nTitle: Field Camp Information Session
\nHost: McHenry<\/p>\n
Thursday, November 5, 2020<\/h3>\n
Dr. Ken Farley, CalTech
\nTitle: The Mars 2020 Perseverance Mission: first step in Mars Sample Return
\nHost: Jordan Ludyan<\/p>\n
Thursday, November 12, 2020<\/h3>\n
Dr. Michael Poland, USGS
\nTitle: Science F(r)icton: Geoscience communication challenges and opportunities in a world that’s gone bonkers
\nHost: Cameron<\/p>\n
Thursday, November 19, 2020<\/h3>\n
Dr. Lisa Tauxe, UCSD
\nTitle: A Reassessment of the Chronostratigraphy of Late Miocene C3\u2013C4 Transitions
\nHost: Bowles<\/p>\n
Thursday, December 3rd, 2020<\/h3>\n
Dr. Orkan Umurhan, NASA
\nTitle: TBD
\nHost: Bowles<\/p>\n","protected":false},"excerpt":{"rendered":"
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