Limits of the Presence of Impact-Induced Hydrothermal Alteration in Small Impact Craters on the Earth: Implications for the Importance of Small Craters on Mars

Details Limits of the Presence of Impact-Induced Hydrothermal Alteration in Small Impact Craters on the Earth: Implications for the Importance of Small Craters on Mars Limits of the Presence of Impact-Induced Hydrothermal Alteration in Small Impact Craters on the Earth: Implications for the Importance of Small Craters on Mars

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icbg.conf...51n&link_type=abstract

Impact Cratering: Bridging the Gap Between Modeling and Observations, p. 51

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1

Hydrothermal Systems, Impact Damage, Craters, Earth (Planet), Mars Craters, Mars Surface, Water, Trapping, Temperature Effects, Position (Location), Minerals, Mathematical Models

Scientific paper

Impact craters on the earth contain evidence for hydrothermal activity. An important property of small craters is the limit to the amount of energy deposited during the impact that can lead to hydrothermal activity. Hydrothermal activity is potentially important for producing alteration minerals, trapping water, and transporting mobile elements to the martian surface. Hydrothermal systems in impact craters may also be important for astrobiological investigations in terms of providing environments for organic chemical processes to occur and as near-surface locations that could be easily investigated by surface exploration missions. Another important reason for understanding the lower limit on thermal effects for small craters is in the use of small superimposed craters as probes of larger craters during surface missions. If hydrothermal material is found associated with superimposed craters it will be important to distinguish between hydrothermal events associated with the earlier versus the later crater. In the future, comparisons of our observations with numerical models for the formation of small craters can lead to a better understanding of the role of small craters on Mars.

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