Past Seminars

Learning about asteroids, and their impact hazard from the study of meteorites

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Abstract

Chondritic meteorites are the most pristine materials arriving to the Earth’s surface, and were the primordial building blocks of planets, asteroids and comets. Their chemical content reveal that they are aggregates preserving the protoplanetary disk primordial. In this talk an updated vision of our studies on the chondritic flux on Earth will be given. About 50.000 metric tones per year of interplanetary materials are reaching the Earth’s surface, mostly as tiny rain that can be studied as micrometeorites. We have demonstrated that these chondritic minerals have catalytic properties under presence of heat, water and amides. How can we join efforts to explore the magnitude of this flux over geologic time?

Given that during the so-called Late Heavy Bombardment about 3.8 Gyrs ago the magnitude of this meteoritic flux was about 5-6 orders of magnitude higher than the current one, what could have being the role of these materials to increase chemical complexity, and facilitate the appearance of life on Earth and other planetary bodies?

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