Soret diffusion: A possible cause of compositional heterogeneity within tektites

Details Soret diffusion: A possible cause of compositional heterogeneity within tektites Soret diffusion: A possible cause of compositional heterogeneity within tektites

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..397d&link_type=abstract

In Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 397-398 (SEE N94-12015 01-91)

Physics

Australites, Diffusion, Geochemistry, Heterogeneity, Meteoritic Composition, Petrology, Planetary Geology, Tektites, Abundance, Electron Probes, Trace Elements

Scientific paper

Although a terrestrial origin for tektites is well-established on geochemical evidence, the physical processes involved in tektite formation have been largely ignored by geochemists and petrologists. For example, two observations that potentially bear on the physics of their origin are the following: (1) The flange of an australite is often more heterogeneous than its core; and (2) microtektites are compositionally more diverse than tektites. The first observation contradicts the traditional view of flange formation since a second heating to super-liquidus temperatures during atmospheric re-entry should, by chemical diffusion and mixing, have tended to homogenize the melt as it flowed off the leading edge of the core to form the flange. Analyses of an australite flange have been performed by electron microprobe. The results of those analyses emphasize the magnitude of the heterogeneity, as well as the well-defined elemental correlations that may constrain the process responsible for it. The second observation that the bulk compositions of microtektites are more divers than the tektites within the same strewnfield is a well-known characteristic, for which no quantitative explanation has been offered. The current investigation has involved the analysis of 43 Australasian microtektites from the Wharton Basin by electron microprobe, as well as trace-element abundances on fifteen of these microtecktites by INAA.

Affiliated with

Also associated with

No associations

Rating

Soret diffusion: A possible cause of compositional heterogeneity within tektites 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 Soret diffusion: A possible cause of compositional heterogeneity within tektites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soret diffusion: A possible cause of compositional heterogeneity within tektites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1447989