Trace Element Partitioning in Porphyritic, Pyroxene-rich Chondrules in Semarkona

Details Trace Element Partitioning in Porphyritic, Pyroxene-rich Chondrules in Semarkona Trace Element Partitioning in Porphyritic, Pyroxene-rich Chondrules in Semarkona

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..619j&link_type=abstract

Lunar and Planetary Science, volume 27, page 619

Computer Science

Chondrites: Ordinary, Chondrules, Pyroxene, Trace Elements

Scientific paper

The behavior of trace elements during chondrule crystallization has not been investigated extensively. The most detailed study is that of Alexander, who determined trace element data for olivine, pyroxene and glass for chondrules from three ordinary chondrites, Semarkona, Bishunpur and Chainpur. We have measured trace element concentrations (REE, Sr, Y and Zr) of pyroxenes and mesostases in four chondrules from Semarkona, with a view to understanding the behavior of these elements during chondrule crystallization. REE elements are incompatible in all pyroxenes, but are more strongly partitioned into Ca-rich pyroxenes than low-Ca pyroxenes. Pyroxenes have negative Eu anomalies, consistent with igneous crystallization, and mesostases have complementary positive Eu anomalies, consistent with closed system fractional crystallization of individual chondrules. Partition coefficients of many of the minor and trace elements measured are higher than equilibrium values in comparable systems. This is attributed to the rapid cooling rate of the chondrules. One of the chondrules studied has notably high REE partition coefficients for augite, close to 1. This may be attributable to the high Al2O3 content of this augite which enhances charge-balanced substitutions for M3+ cations such as REE.

Affiliated with

Also associated with

No associations

Rating

Trace Element Partitioning in Porphyritic, Pyroxene-rich Chondrules in Semarkona 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 Trace Element Partitioning in Porphyritic, Pyroxene-rich Chondrules in Semarkona, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trace Element Partitioning in Porphyritic, Pyroxene-rich Chondrules in Semarkona will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1612710