Determining the relative extent of alteration in CM chondrites

Details Determining the relative extent of alteration in CM chondrites Determining the relative extent of alteration in CM chondrites

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..203b&link_type=abstract

In Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 203-204 (SEE N94-12015 01-91)

Computer Science

Chemical Analysis, Cold Bokkeveld Meteorite, Meteoritic Composition, Murchison Meteorite, Aqueous Solutions, Depletion, Silicates

Scientific paper

The aqueous alteration of CM chondrites provides a record of the processes attending the earliest stages of parent body evolution. However, resolving the alteration pathways of chondritic evolution requires a means for distinguishing the relative extent of alteration that individual samples have experienced. Three new indices for gauging the relative degree of alteration in CM chondrites based on modal and compositional analyses of 7 CM falls were proposed. The proposed alteration parameters are consistent with the basic tenets of several previous models and correlate with additional indices to produce an integrated method for determining the relative extent of alteration. The model predicts the following order of progressive alteration: Murchison (MC) is less than or equal to Bells (BL) is less than Murray (MY) is less than Cochabamba (CC) is less than Mighei (MI) is less than Nogoya (NG) is less than or equal to Cold Bokkeveld (CB). The broad range of CM phyllosilicate compositions observed within individual meteorites is fundamental to the characterization of the aqueous alteration process. Chemical analyses of CM phyllosilicates suggest that these phases became systematically enriched in Mg and depleted in Fe with increasing alteration.

Affiliated with

Also associated with

No associations

Rating

Determining the relative extent of alteration in CM chondrites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Determining the relative extent of alteration in CM chondrites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining the relative extent of alteration in CM chondrites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1447218