Other
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....8710083a&link_type=abstract
(International Colloquium on Mars, 3rd: Dedicated to Thomas A. Mutch /1931-1980/, Pasadena, CA, Aug. 30-Sept. 2, 1982.) Journal
Other
56
Breccia, Crystallization, Hydrothermal Crystal Growth, Impact Melts, Mars Craters, Mars Surface, Mineralogy, Iron, Low Pressure, Low Temperature, Magnesium, Planetology
Scientific paper
An examination is made of samples of melt rock and breccia from 12 terrestrial impact craters to identify alteration minerals and their conditions of formation. It is found that in most cases the dominant assemblage is clay-silica-K feldspar-zeolite, suggesting hydrothermal alteration at low pressures and temperatures of 100-300 C. The clays are in the main Fe-chlorites and smectites, in most cases depleted in Al and enriched in Fe and Mg relative to their source rocks. The alteration of impact glass is found often to be complete, whereas the alteration of crystalline melt rock is limited to a few percent of the rock volume. Impact breccia is altered to only a slight extent compared with the alteration of glass. It is believed that impact-induced hydrothermal alteration is to be expected at Martian impact sites if significant quantities of ground ice and/or water are present.
Allen Christine
Gooding James L.
Keil Klaus
No associations
LandOfFree
Hydrothermally altered impact melt rock and breccia - Contributions to the soil of Mars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hydrothermally altered impact melt rock and breccia - Contributions to the soil of Mars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrothermally altered impact melt rock and breccia - Contributions to the soil of Mars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1758117