John C Lassiter
The Third Mr. and Mrs. Charles E. Yager Professorship (Fellow)
Mailcode: C1100
Dr. Lassiter's research focus is on the application of isotope and trace element geochemistry to fundamental problems of the Earth's origin and evolution, including but not limited to: Structure and chemical evolution of the mantle and crust; Origin of mantle plumes and nature of plume/lithosphere interaction; Generation and segregation of magma; Origin and chemical evolution of continental lithosphere; Chemical fluxes in constructive and destructive tectonic environments. Current areas of interest include the role of crust and lithospheric mantle recycling in the generation of mantle chemical heterogeneity, the origin and distribution of water and other volatile elements in the Earth's interior, and the thermal and chemical evolution of the Earth's core and core/mantle boundary.
Areas of Expertise
Earth's origin and evolution, isotope and trace element geochemistry, the role of crust and lithospheric mantle recycling in the generation of mantle chemical heterogeneity, the origin and distribution of water and other volatile elements in the Earth's interior, and the thermal and chemical evolution of the Earth's core and core/mantle boundary
Research Locations
Postdoctoral Fellowship - National Science Foundation (1995 - 1997)
The Berkeley Fellowship - to be entered (1993 - 1995)
Graduate Research Fellowship - National Science Foundation (1990 - 1993)
Phi Beta Kappa Honor Society - Brown University (1989)
Sigma Xi Science Honor Society - Brown University (1989)
Associate Editor, Reviews of Geophysics (2002)
Member, American Geophysical Union
member, Geochemical Society
member, European Union of Geosciences
Graduate Students
Sarah Brooker
, Ph.D., expected 2026
(Committee Member)
I am a second-year Ph.D. student in the stable isotope group at UT Austin. My primary research interests are using stable isotope systems, both traditional and non-traditional, to understand high-temperature fluid-rock reactions in igneous systems.
Amber Taylor , Ph.D., expected 2024 (Supervisor)
George H Segee-Wright
, Ph.D., expected 2024
(Co-supervisor)
I am a mantle geochemist with a focus on volatile element cycling between Earth's surface and mantle. I am interested in combining radiogenic and stable isotope measurements to better constrain lithospheric recycling into the mantle. My current research focuses on using halogen abundances and chlorine isotopes to trace subducted volatile elements into the sub-continental lithospheric mantle and the convecting mantle.
Joshua Munro
(Supervisor)
Understanding the effects of subduction on the O-H-Mg-Ca-Zn isotope composition of the downgoing slab, focusing on the Farallon Plate, North America
Scott Eckley, Ph.D., 2022
(Co-supervisor)
Jackson School of Geosciences
Edward Marshall, Ph.D., 2018
(Co-supervisor)
University of Texas at Austin
Leslie Bruce, M.S., 2017
(Supervisor)
University of Texas at Austin
Ruohan Gao, Ph.D., 2016
(Supervisor)
University of Texas at Austin
Rudra Chatterjee, Ph.D., 2016
(Supervisor)
University of Texas at Austin
Benjamin Byerly, Ph.D., 2014
(Supervisor)
University of Texas at Austin
Lindsay Szramek, Ph.D., 2010
(Co-supervisor)
University of Texas at Austin
| Year | Semester | Course | |
|---|---|---|---|
| 2024 | Spring | GEO 303C | Intro To The Solar System |
| 2023 | Fall | GEO 388T | High-Temperature Geochemistry |
| 2023 | Fall | GEO 376T | High-Temperature Geochemistry |
| 2023 | Spring | GEO 193 | Technical Lecture Series |
| 2023 | Spring | GEO 303C | Intro To The Solar System |
| 2022 | Fall | GEO 366P | Planetary Geo/Geophysics |
| 2022 | Fall | GEO 371C | Earth In Deep Time |
| 2022 | Fall | GEO 391 | Earth In Deep Time |
| 2022 | Fall | GEO 193 | Technical Lecture Series |
| 2022 | Fall | GEO 398P | Planetary Geo/Geophysics |
| 2022 | Spring | GEO 193 | Technical Lecture Series |
| 2022 | Spring | GEO 303C | Intro To The Solar System |
| 2021 | Fall | GEO 193 | Technical Lecture Series |
| 2021 | Fall | GEO 388T | High-Temperature Geochemistry |
| 2021 | Fall | GEO 376T | High-Temperature Geochemistry |
| 2021 | Spring | GEO 391 | Earth In Deep Time-Wb |
| 2021 | Spring | GEO 303C | Intro To The Solar System-Wb |
| 2020 | Fall | GEO 391 | Planetary Geology / Geophysics |
| 2020 | Fall | GEO 366P | Planetary Geo/Geophysics-Wb |
| 2020 | Spring | GEO 303C | Intro To The Solar System |
| 2019 | Fall | GEO 388T | High-Temperature Geochemistry |
| 2019 | Fall | GEO 376T | High-Temperature Geochemistry |
| 2019 | Spring | GEO 391 | Earth In Deep Time |
| 2019 | Spring | GEO 303C | Intro To The Solar System |
| 2018 | Spring | GEO 303C | Intro To The Solar System |
| 2017 | Fall | GEO 394 | Rsch In Geological Sciences |
| 2017 | Fall | GEO 388T | High-Temperature Geochemistry |
| 2017 | Fall | GEO 376T | High-Temperature Geochemistry |
| 2017 | Spring | GEO 303C | Intro To The Solar System |
| 2017 | Spring | GEO 391 | Earth In Deep Time |
| 2017 | Spring | GEO 394 | Rsch In Geological Sciences |
| 2016 | Fall | GEO 394 | Rsch In Geological Sciences |
| 2016 | Spring | GEO 394 | Rsch In Geological Sciences |
| 2016 | Spring | GEO 303C | Intro To The Solar System |
| 2015 | Fall | GEO 394 | Rsch In Geological Sciences |
| 2015 | Fall | GEO 388T | High-Temperature Geochemistry |
| 2015 | Fall | GEO 376T | High-Temperature Geochemistry |
| 2015 | Spring | GEO 391 | Earth In Deep Time |
| 2015 | Spring | GEO 303C | Intro To The Solar System |
| 2014 | Fall | GEO 394 | Rsch In Geochemistry |
| 2014 | Spring | GEO 303C | Intro To The Solar System |
| 2014 | Spring | GEO 394 | Rsch In Geochemistry |