The effects of impact on D/H of hornblendes - Applications to SNC petrogenesis

Details The effects of impact on D/H of hornblendes - Applications to SNC petrogenesis The effects of impact on D/H of hornblendes - Applications to SNC petrogenesis

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..959m&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 959.

Physics

1

Petrogenesis, Hypervelocity Impact, Meteorites, Mars Surface, Aggregates

Scientific paper

The long-standing question of the Martian water budget has been addressed by studies of hydrous minerals contained within the SNC meteorites, widely believed to be of Martian origin. These minerals are characterized by low H contents and elevated delta-D, relative to terrestrial materials. An explanation for these observations is the preferential loss of H-1 due to nonequilibrium fractionation of H-1 relative to D during impact. Impact experiments were conducted on amphibolite and ion microprobe analyses of shocked and unshocked hornblende were carried out to test impact as a mechanism of relative D-enrichment. Shocked hornblende was found to have D/H ratios 2-4 times greater than those of unshocked hornblende.

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