Rocky planets as the Lavosier-Lomonosov Bridge from the non-living to the living world - Research seminar with Prof Stephen Mojzsis
Life on Earth emerged at the interface of the planet’s geosphere, hydrosphere and atmosphere. This setting serves as our basis for how biological systems originate on rocky planets. Often overlooked, however, is the fact that a terrestrial-type planet’s chemical nature is ultimately a product of the Galaxy’s long term evolution. Elemental abundances of the major rock-forming elements (e.g. Si, Mg, Fe) can be different for different stars and planets formed at different times in galactic history. These differences mean that we cannot expect small rocky exoplanets to be just like Earth. Furthermore, age of the system dictates starting nuclide inventory from galactic chemical evolution, and past, present and future mantle and crust thermal regimes. A rocky planet’s bulk silicate mantle composition modulates the kind of atmosphere and hydrosphere it possesses. Hence, the ingredients of a rocky planet are as important for its potential to host life as proximity to the so-called habitable zone around a star where liquid water is stable at the surface. To make sense of these variables, a new trans-disciplinary approach is warranted that fuses the disciplines of Geology and Astronomy into what is here termed, Geoastronomy.

Ref. Mojzsis, S.J. (2022) Geoastronomy: Rocky planets as the Lavoisier-Lomonsov Bridge from the non-living to the living world. in Royal Society of Chemistry-Prebiotic Chemistry and Life’s Origin, 21-76.
Date: 20 October 2023, 12:00 (Friday, 2nd week, Michaelmas 2023)
Venue: Department of Earth Sciences, South Parks Road OX1 3AN
Venue Details: Lecture Theatre
Speaker: Prof Stephen Mojzsis (University of Colorado Boulder)
Organising department: Department of Earth Sciences
Part of: Earth Sciences departmental seminars
Booking required?: Not required
Booking url: https://www.earth.ox.ac.uk/events/week-2-research-seminar-with-prof-stephen-mojzsis/
Audience: Members of the University only
Editor: Maria Petrunova