H-chondrite volatile-trace-element compositional structure

Details H-chondrite volatile-trace-element compositional structure H-chondrite volatile-trace-element compositional structure

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994metic..29q.552w&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 29, no. 4, p. 552

Other

1

Chondrites, Meteoritic Composition, Temperature Profiles, Trace Elements, Volatility, Astronomical Models, Canonical Forms, Principal Components Analysis

Scientific paper

Chemometric data analysis techniques have proven useful in interpreting volatile-trace-element composition data in H chondrites. Recently, multi-variate linear discriminant analysis and model-independent randomization-simulation have demonstrated that H4, H5, and H6 chondrites are distinguishable from each other with differences being consistent with the onion shell model for the H chondrite parent body. These techniques do not identify which specific elements discriminate between populations. We examine those volatile-trace-element patterns that lead to discrimination by utilizing two techniques that help interpret volatile-trace-element composition structure: principal component analysis (PCA) and canonical details analysis. Volatile trace elements are extremely sensitive to subtle differences in thermal history. Data exist for 58 H chondrite falls. PCA is a technique for analyzing the structure of multivariate datasets. Application of PCA to our 11-dimensional volatile-trace-element dataset reveals that 8 dimensions are required to account for 90% of the variance of in the dataset. The relatively large number of principal components required to account for the total variance indicates a minimum of correlation bewteen these 11 volatile trace elements. This large number of factors serves as a measure of the true complexity of the volatile-trace-element compositional structure. Each element contributes unique information about the thermal history of each meteorite. A method that allows visualization of each element's contribution to discrimination is a canonical details plot. The centroid of each population in two-dimensional canonical space is graphically illustrated. All 11 volatile trace elements affect discrimination between these populations to varying degrees. Findings are consistent with the onion shell model of the H-chondrite parent body. However, a more complex relationships between volatile-trace-element composition and thermal history is emerging. This complex volatile-trace-element pattern results from variations during condensation of H-chondrite parent material.

Affiliated with

Also associated with

No associations

Rating

H-chondrite volatile-trace-element compositional structure 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 H-chondrite volatile-trace-element compositional structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and H-chondrite volatile-trace-element compositional structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-822259