Evidence for aqueous alteration in a carbonaceous xenolith from the Plainview /H5/ chondrite

Details Evidence for aqueous alteration in a carbonaceous xenolith from the Plainview /H5/ chondrite Evidence for aqueous alteration in a carbonaceous xenolith from the Plainview /H5/ chondrite

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46..557n&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Apr. 1982, p. 557-563.

Computer Science

5

Carbonaceous Chondrites, Hydration, Inclusions, Metal Compounds, Meteoritic Composition, Mineralogy, Aluminum Compounds, Calcite, Clays, Iron Meteorites, Mass Transfer, Metal Oxides, Microanalysis, Olivine, Refractory Metals, Silicates, Meteorites, Carbonaceous Chondrites, Xenoliths, Plainview Meteorite, H5 Chondrites, Alteration, Clasts, Inclusions, Morphology, Composition, Mineralogy, Microprobe, Calcite, Phyllosilicates, Oxides, Parent Bodies, Water, Source, Clays, Ice, Origin, Procedure, Analysis, Techn

Scientific paper

The compositions of the mineral components of two inclusions within a CM-like clast in the Plainview (H5) chondrite are determined. The inclusions have the morphologies of an Allende-like, coarse-grained CAI and an amoeboid olivine inclusion, respectively. Major constituents of the altered inclusions are found to be calcite, Mg-Fe-rich phyllosilicates, Fe-Ti oxides, and an Al-rich phyllosilicate, and it is suggested that the alteration process would have required transport of Ne, Cl, H2O, CO2, and FeO. Liquid water appears to be the medium in which the alterations took place, due to the presence of hydrous phases and significant quantities of iron required to produce the mineral assemblages now present from the inferred starting materials.

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