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Winter 2023 TPG: Tectonics-Petrology-Geochronology Zoom Seminar Series

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Organized by Stanford. On Zoom. Open to all geoscientists everywhere.

Download announcement (pdf)

Late changes: NONE YET
(This is for changes such as cancellations, but changes may take time to update to this page.)

Date and Time

Wednesdays, February 1 to March 1
12:05 to 1:00 pm US Pacific Standard Time
(21:05 to 22:00 Central European Time)
Some people log in early to chat with colleagues.
Question periods commonly extend to 1:20 pm.

Zoom link

Zoom meeting ID: 984 3770 0929; password: 313758.


Feb. 1: Thomas Benson, Lithium Americas Corporation
“The geology and origin of the sedimentary-type lithium resource in the McDermitt Caldera, Nevada and Oregon: the largest known lithium deposit in the world”
Benson, T.R., M.A. Coble, J.J. Rytuba, and G.A. Mahood, 2017, Lithium enrichment in rhyolite magmas of intracontinental calderas leads to Li deposits in caldera basins. Nature Communications, v. 8, 270, 9 pp.

Feb. 8: Maryjo Brounce, University of California, Riverside
“Redox variations in Mauna Kea and Reunion lavas, and heterogeneity in the oxygen fugacity of mantle plumes”
Brounce, M., E. Stolper, and J. Eiler, 2022, The mantle source of basalts from Reunion Island is not more oxidized than MORB source mantle. Contributions to Mineralogy and Petrology, v. 177, 18 pp.

Feb. 15: Marty Grove, Stanford University
"Advances in detrital K-feldspar coupled 40Ar/39Ar thermochronology and Pb isotopic geochemistry"
Shulaker, D.Z., M. Grove, J.K. Hourigan, N. Van Buer, G. Sharman, K. Howard, J. Miller, and  A.P. Barth, 2019, Detrital K-feldspar Pb isotopic evaluation of extraregional sediment transported through an Eocene tectonic breach of southern California's Cretaceous batholith. Earth and Planetary Science Letters, v. 508, p. 4-17.

Feb. 22: Emily Chin, Scripps Institution of Oceanography
"The peridotite deformation cycle in cratons and the deep impact of subduction"
Chin, E.J., B. Chilson-Parks, Y. Boneh, G. Hirth, A.E. Saal, B.C. Hearn, and E.H. Hauri, 2021. The peridotite deformation cycle in cratons and the deep impact of subduction. Tectonophysics, v. 817, p. 229029, 22pp.

March 1: Paul Hoffman, University of Victoria
“Cryogenian Snowball Earth: rocks, models and biomes” 
Hoffman, P.F. & 25 coauthors, 2017, Snowball Earth climate dynamics and Cryogenian geology–geobiology. Science Advances 3: e1600983, 43 pp.


  • Registration is optional but highly recommended. If you were registered in 2022, you don’t need to register again.
  • To register, please email (Trevor Dumitru) using subject line “TPG Reg”. The only information we need is your email address. We’ll email you updates, weekly reminders, changes, etc. 
  • We may not read emails with subject line “TPG Reg,” so please send questions, etc. using subject line “TPG Questions”.


  • Talk level: Advanced; directed mainly toward graduate students, post-docs, faculty, and geoscientists with interests in TPG.
  • Our Zoom limit is 500 people. In the unlikely event a meeting exceeds 500 and you can’t join, please email us so we’ll know (but we won’t be able to help for that talk).