Impact-generated Hydrothermal Activity: The Record in Terrestrial Craters

Details Impact-generated Hydrothermal Activity: The Record in Terrestrial Craters Impact-generated Hydrothermal Activity: The Record in Terrestrial Craters

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..935n&link_type=abstract

Lunar and Planetary Science, volume 27, page 935

Other

Alteration: Hydrothermal, Craters: Impact, Heating: Impact, Impactites

Scientific paper

Any impact into water-bearing planetary surfaces produces the long-term (hundreds of thousands years) hydrothermal activity in formed craters. Its record in terrestrial craters is the following: occurrence of appropriate associations of minerals (including ore-forming parageneses), migration of a series of chemical elements, and existence of specific fluid inclusions. The general model of impact-induced hydrothermal process is suggested, based on both simulation of the thermal evolution of central uplift and petrological analysis of hydrothermal mineral associations in large craters. The volume of the circulation cell occurring mainly the central up~ift, is estimated to reach 1000 km^3 in large (D = 50 km) craters; besides super-heated bodies of impact melt rocks create local circulation systems in crater fill. Similar process may contribute to the formation of the martian soil.

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