Publication Date:
2019-07-13
Description:
Oxygen isotopic compositions of chondrites reflect mixing between a O-16-rich reservoir and a O-17,O-18-rich reservoir produced via mass-independent fractionation. The composition of the O-16-rich reservoir is reasonably well constrained, but material representing the O-17,O-18-rich end-member is rare. Self-shielding models predict that cometary water, presumed to represent this reservoir, should be enriched in O-17 and O-18 18O by 〉 200%. Hydrated interplanetary dust particles (IDPs) rich in carbonaceous matter may be derived from comets; such particles likely contain the products of reaction between O-16-poor water and anhydrous silicates that formed in the inner solar system. Here we present mineralogy and oxygen isotope compositions of two C-rich hydrated IDPs, L2083E47 and L2071E35.
Keywords:
Lunar and Planetary Science and Exploration
Type:
JSC-CN-26571
,
75th Annual Meeting of the Meteroritical Society meeting; Aug 12, 2012 - Aug 17, 2012; Cairns; Australia
Format:
application/pdf
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