Constraints for chondrule formation from Ca-Al distribution in carbonaceous chondrites

Details Constraints for chondrule formation from Ca-Al distribution in carbonaceous chondrites Constraints for chondrule formation from Ca-Al distribution in carbonaceous chondrites

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008e%26psl.265..716h&link_type=abstract

Earth and Planetary Science Letters, Volume 265, Issue 3-4, p. 716-725.

Computer Science

11

Scientific paper

Chondritic meteorites and their components formed in the protoplanetary disk surrounding the nascent sun. We show here that the two volumetrically dominating components of carbonaceous chondrites, chondrules and matrix did not form independently. They must have been derived from a single, common source. We analyzed Ca and Al in chondrules and matrix of the CV type carbonaceous chondrites Allende and Y-86751. The Ca/Al-ratios of chondrules and matrix of both chondrites are complementary, but in case of Allende chondrules have sub-chondritic and matrix super-chondritic Ca/Al-ratios and in case of Y-86751 chondrules have super-chondritic and matrix sub-chondritic Ca/Al-ratios. This rules out the redistribution of Ca between chondrules and matrix during parent body alteration. Tiny spinel grains in the matrix produce the high Al in the matrix of Y-86751. In Allende these spinels were most probably included in chondrules. The most plausible explanation for this Ca- and Al-distribution in the same type of chondrite is that both chondrules and matrix formed from the same chemical reservoir. Tiny differences in nebular conditions during formation of these two meteorites must have led to the observed differences. These are severe constraints for all models of chondrule formation. Any model involving separate formation of chondrules and matrix, such as the X-wind model can be excluded.

Affiliated with

Also associated with

No associations

Rating

Constraints for chondrule formation from Ca-Al distribution in carbonaceous 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 Constraints for chondrule formation from Ca-Al distribution in carbonaceous chondrites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints for chondrule formation from Ca-Al distribution in carbonaceous chondrites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-753751