Physics
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983lpsc...13..741r&link_type=abstract
In: Lunar and Planetary Science Conference, 13th, Houston, TX, March 15-19, 1982, Proceedings. Part 2. (A83-21281,07-91) Washing
Physics
1
Breccia, Chondrites, Meteoritic Composition, Regolith, Chemical Composition, Electron Microscopes, Neutron Activation Analysis, Olivine, Oxygen Isotopes, Petrography
Scientific paper
Meteorite regolith breccias are clastic rocks which formed by lithification of fragmental regolith material that once resided at the surface of a meteorite parent body. A study is reported of the matrix and 21 clasts of various sizes (0.2-24 mm) in the Dimmitt H chondrite regolith breccia using petrographic and electron microprobe techniques. In addition, oxygen isotope studies of three clasts and instrumental neutron activation analysis (INAA) and Ar-39/Ar-40 age dating of one clast are reported. The Dimmitt meteorite was found about 1942 near Dimmitt, Texas. Attention is given to analytical procedures, the clastic matrix, equilibrated clasts, poikilitic melt-rock clast, clasts of different chondrite groups, graphite-magnetite aggregates, the origin of exotic clasts, and the complexity of parent body surfaces processes.
Allen S. B. J.
Bogard Donald D.
Clayton Robert N.
Jeffrey Taylor G.
Keil Klaus
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