Computer Science
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1029p&link_type=abstract
Lunar and Planetary Science, volume 27, page 1029
Computer Science
2
Chicxulub Impact Event, Cretaceous-Tertiary Boundary, Hydrocode Simulation, Impacts, Melt/Vapor Production
Scientific paper
Our understanding of the effects of impacts on the development and evolution of life is still incomplete and approximate, and very few experimental data are available to help us out. One of the best case-studies for this problem is the Chicxulub impact event. The Chicxulub crater, located in the Yucatan Peninsula, Mexico, has been associated with one of the most dramatic extinction events characterizing the evolution of life on the Earth, the extinction that marks the Cretaceous-Tertiary boundary. Unfortunately, the complex target geology at the Chicxulub site has proven to be a difficult obstacle for modeling studies and up to today, few simulations have been carried out. A good equation of state for the thermodynamic properties of the target materials (in particular carbonates, e.g., calcite, and evaporites, e.g., anhydrite) is still needed. This study reports the progress of our modeling of the target geology in the Chicxulub event. The main improvement over previous work consists in the development of an ANEOS equation of state for calcite and granite, which are necessary for an accurate simulation of the Chicxulub event. The preliminary results of our simulation indicates a CO2 production of 1-2 1015 kg, lower than in previous studies, and a production of water vapor of about 6 1012 kg, most of which will end up in the stratosphere. Tracer particles are used in the simulation to follow the trajectory and the thermodynamic conditions of the ejecta plume.
Kring David A.
Melosh Henry Jay
Pierazzo Elisabetta
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