Zusammenfassung
Venus is an extremely hot and dry planet with very little water in
its atmosphere and no standing water on its surface. However, if
Venus had had more water in the past, as the high D/H ratio implies,
hydrous minerals might have formed. We present the first experimental
study that examines the decomposition rate of hydrous minerals, specifically
tremolite, with applications to Venus. We predict that tremolite
can survive decomposition on Venus over geologic time scales at current
and at higher surface temperatures. Thus, if future spacecraft can
detect tremolite, this discovery could serve as evidence of a wetter
Venusian history. (C) 2000 Academic Press.
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