Aqueous alteration in the Kaba CV3 carbonaceous chondrite

Details Aqueous alteration in the Kaba CV3 carbonaceous chondrite Aqueous alteration in the Kaba CV3 carbonaceous chondrite

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.2113k&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, July 1990, p. 2113-2120.

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30

Carbonaceous Chondrites, Grain Size, Moisture Content, Olivine, Chemical Composition, Electron Microscopy, X Ray Diffraction

Scientific paper

Results from TEM and SEM examinations of the Kaba CV3 carbonaceous chondrite are presented, showing that the chondrules and the matrix of Kaba have undergone pervasive low-temperature aqueous alteration, resulting in the formation of Fe-bearing saponite from glass and enstatite in chondrules, and from anhydrous silicates in matrix. The alteration products in Kaba were found to resemble those in other aqueously altered carbonaceous chondrites such as the Mokoia CV3 and in Orgueil CI chondrites and Y-82162 chondrites. However, Kaba lacks the abundant high-Al phyllosilicates, reported for CAIs from Mokoia, and the serpentine and ferrihydrite, found in Orgueil.

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