Thursday, September 17, 2020
Dr. Daniel Wright, UW-Madison
Title: Computational Science to support Decision-making in a wetter Wisconsin
Host: Paradis
Thursday, September 24, 2020
GSA Practice Talks
Title: TBD
Host: Paradis
Thursday, October 1, 2020
Dr. Sonia Tikoo, Stanford
Title: Evolution of the Lunar Dynamo Magnetic Field
Host: Bowles
Link to video talk: Dr. Tikoo Talk
Thursday, October 8, 2020
Dr. John Eichelberger
Title: Drilling to Magma
Host: Cameron
Abstract: 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’s enthusiasm for scientific drilling began at Kilauea Iki lava lake, coring into the molten interior as part of Sandia’s Magma Energy Project. John will present his research on magma drilling to interested universities and events. Geosciences provide a long history of surprises when some thought the big discoveries were over. John proposes that drilling to magma will provide another game-changing surprise. Is 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. John’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.
Thursday, October 15, 2020
Loretta Kwong, Arcadis
Title: Environmental Consulting: From Field Geologist to Project Manager
Host: Paradis
Thursday, October 22, 2020
Dr. Daniel Holm, Kent State
Title: Growth, overprinting, and stabilization of Proterozoic Provinces in the upper Great Lakes region (but mostly Wisconsin!)
Abstract: 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 ± 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 °C, 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.
In 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.
Host: Czeck
Thursday, October 29, 2020
Dr. Lindsay McHenry, UWM
Title: Field Camp Information Session
Host: McHenry
Thursday, November 5, 2020
Dr. Ken Farley, CalTech
Title: The Mars 2020 Perseverance Mission: first step in Mars Sample Return
Host: Jordan Ludyan
Thursday, November 12, 2020
Dr. Michael Poland, USGS
Title: Science F(r)icton: Geoscience communication challenges and opportunities in a world that’s gone bonkers
Host: Cameron
Thursday, November 19, 2020
Dr. Lisa Tauxe, UCSD
Title: A Reassessment of the Chronostratigraphy of Late Miocene C3–C4 Transitions
Host: Bowles
Thursday, December 3rd, 2020
Dr. Orkan Umurhan, NASA
Title: TBD
Host: Bowles