Hydrothermal alteration mineralogy of Home Plate: thermochemical contstraints for their formation conditions

Filiberto, Justin and Schwenzer, Susanne (2011). Hydrothermal alteration mineralogy of Home Plate: thermochemical contstraints for their formation conditions. In: 42nd Lunar and Planetary Science Conference, 7-11 Mar 2011, Houston, TX, USA.

URL: http://www.lpi.usra.edu/meetings/lpsc2011/?view=ab...

Abstract

Home Plate is a plateau in the Columbia Hills of Gusev Crater. It is a layered sequence of clastic rocks with alkali basaltic composition. Based on stratigraphy, structure, sedimentology, mineralogy, and bulk chemistry it is interpreted as pyroclastic deposit and thought to be extensively hydrothermally altered. The hydrothermal alteration is presumed to be of high and low temperature nature. In order to better understand the conditions (P,T,X) of hydrothermal alteration for the Home Plate region we have calculated the hydrothermal alteration mineralogy of Fastball, a primitive basalt from the Home Plate sequence, and compared these results to the mineralogy of the area.

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