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Record Details

Record 67 of 1770
Petrography and origin of refractory inclusions from the Murray and Murchison C2 chondrites
Author and Affiliation:
Simon, S. B.(Chicago Univ., Chicago, IL, United States)
Grossman, L.(Chicago Univ., Chicago, IL, United States)
Hsu, A.(Illinois Mathematics and Science Academy, Aurora., United States)
Abstract: By freeze-thaw disaggregation, we have recovered a total of 47 refractory inclusions. New discoveries include the following: a hibonite-pyroxene spherule from Murray; a CaAl4O7-bearing spherule from Murchison; and a Sc-fassaite-bearing ultrarefractory inclusion from Murchison. Freeze-thaw disaggregation, combined with density separation and hand-picking as described is a proven method for recovering rare objects from carbonaceous chondrites. This method is especially effective on C2's due to their porosity and typically results in the discovery of new types of refractory inclusions. Because few refractory inclusions from Murray have been described, we studied this meteorite, although only a small amount of material (730 mg) was available for disaggregation. Many refractory inclusions from Murchison have been described, and we disaggregated a larger amount (approximately 18 g) of Murchison in an attempt to find new types of refractory inclusions, especially corundum-bearing ones.
Publication Date: Jan 01, 1993
Document ID:
19940016297
(Acquired Dec 28, 1995)
Accession Number: 94N20770
Subject Category: ASTROPHYSICS
Coverage: Abstract Only
Document Type: Conference Paper
Publication Information: Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z; p 1309-1310
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Chicago Univ.; Dept. of Geophysical Sciences.; Chicago, IL, United States
Description: 2p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: INCLUSIONS; MURCHISON METEORITE; MURRAY METEORITE; PETROGRAPHY; REFRACTORY MATERIALS; METEORITIC COMPOSITION; POROSITY; SPHERULES
Imprint And Other Notes: In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1309-1310 (SEE N94-20636 05-91)
Availability Source: Other Sources
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