The Earth and Planets Laboratory hosts free weekly scientific seminars most Mondays and Thursdays. The popular seminar series covers the broad range of topics studied on our campus and are presented by both guest speakers and Carnegie scientists.
Note: These seminars are designed for a scientific audience and have limited space, so we are not advertising the Zoom links publically. However, you're still welcome to join! Just email Alycia Alexander (adalexander@carnegiescience.
- Monday, September 13, 2021, at 11:00 a.m.
Alexander Evans, Brown University
Title: The First Billion Years of Lunar Evolution: A Geophysical Perspective
Abstract: Although several aspects surrounding the early evolution of our Solar System remain shrouded in mystery, the Moon has recorded on its well-preserved and ancient surface much of the history of our Solar System. With accessibility and data returned from orbital and landed spacecraft, the Moon has a unique role in understanding and constraining the evolution of the planets in our Solar System, as well as the timing of its many major events. In this talk, I attempt to unravel some of the mysteries of the Moon from its surface down to its core, to reveal a new understanding of the Moon, the Earth, and the Solar System.
Host: Anat Shahar
- Monday, September 20, 2021, at 11:00 a.m.
Anna Barth, University of California, Berkeley
Title: Ascent rates and volatiles of explosive basaltic volcanismAbstract: Explosive volcanic eruptions are propelled to the surface by the exsolution of vapour bubbles from magma due to decompression. A long-held view is that the amount of H2O dissolved in the magma at depth controls the intensity of an explosive eruption. Growing evidence from studies reporting H2O concentrations of melt inclusions (MIs) do not support this view. Instead, the rate at which magma ascends to the surface may play an important role in modulating the eruption style. Slow magma ascent allows the vapour bubbles to rise ahead of the magma, thereby diffusing the driving force for an explosive eruption, whereas for fast magma ascent, the bubbles remain essentially trapped within the magma, causing acceleration and the potential for an explosive eruption. This talk will highlight some new tools that we have developed for estimating magma decompression rate and their application to several notable eruptions of different intensities at Cerro Negro Volcano, Nicaragua, and Etna Volcano, Sicily. I will end with some remaining mysteries and suggest possible avenues for future experimental and modelling work.Host: Helene Le Mevel
- Monday, September 27, 2021, at 11:00 a.m.
Karyn Rogers, RPI
Title: Exploring abiotic, prebiotic, and biotic constraints on planetary habitability by reimaging planetary conditions in laboratory experiments
Abstract: Planetary habitability includes a broad range of processes, from the reduction of CO2 to form simple organic compounds, to the expansive environmental parameters that can support life on this planet and beyond. As our understanding of Hadean environments has evolved, so have the scenarios for potential prebiotic pathways. Similarly, the discovery of microbes in extreme ecosystems changed the fundamental way we explore microbial diversity. The common thread that binds these diverse research avenues together is the suite of planetary conditions that constrain these processes.
Host: Andrew Steele
- Monday, October 4, 2021, at 11:00 a.m.
Federica Coppari, LLNL
Title: X-ray diffraction and laser-compression reveal complex material behavior at extreme conditionsAbstract: The use of lasers to induce extreme compression states has enabled the study of material properties and equations of state at unprecedented pressure and temperature conditions. By carefully designing the laser pulse shape (i.e. laser power vs time), one can compress and heat the sample to a specific state, allowing the investigation of the material phase diagram.Host: Sally June Tracy
- Tuesday, October 12, 2021, at 11:00 a.m.
Eve Lee, McGill University
Host: John Chambers
- Monday, October 18, 2021, at 11:00 a.m.
Damian Swift, LLNL
Host: Ron Cohen
- Monday, October 25, 2021, at 11:00 a.m.
Courtney Jean Sprain, University of Florida
Host: Peter Driscoll
- Monday, November 1, 2021, at 11:00 a.m.
Lucas Cieza, Universidad Diego Portales, Santiago
Host: Alan Boss
View Past Seminars:
We record and publish most seminars on our YouTube Channel.