Other
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....4450e&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #4450
Other
Scientific paper
Isidis Planitia, named in 1973, is among the largest impact basins on Mars with a diameter of about 1238 km. Isidis is located at N14.1 deg and W271.0 degrees and is the boundary between ancient highlands and the Northern plains. Isidis was selected as the landing site for the Mars Express Beagle 2 Lander and is the focus of this research on hydrothermal modeling. The authors will discuss the potential that Isidis may have to form hydrothermal zones due to its impact origin and the longevity of these system for various lithologies. Our model shows that during its formation Isidis produced enough energy (total impact energy=~2.8E33 Ergs, energy absorved bythe target rock=~5.3E32 Ergs) that could have created a potential zone that could favor hydrothermal systems in the water rich environment that existed during its formation. Our model shows that a concentric zone of 70-618km from the center of the planitia would have the highest potential for hydrothermal activity. A composition of of rich clays soils produces the a longevity of ~137 Ma, while a basaltic composition yields a lifetime of ~87 Ma years. Hydrothermal systems have long being proposed as good candidates for niches of life the impact genesis of Isidis may have produced such environment conducive to life.
Echaurren J.
Ocampo Adriana
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