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| Pecora Escarpment 91007 | |||||||||||||||||||||||||
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| Basic information | Name: Pecora Escarpment 91007 This is an OFFICIAL meteorite name. Abbreviation: PCA 91007 Observed fall: No Year found: 1991 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  224 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 237 approved meteorites classified as Eucrite-br. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 15(2):
Sample No.: PCA91007 Location: Pecora Escarpment Field Number: 7729 Dimensions (cm): 6.8 x 4.8 x 4.5 Weight (g): 223.6 Meteorite Type: Eucrite
Macroscopic Description: Cecilia Satterwhite, Shiny, black fusion crust covers 40% of the exterior of PCA91007. The interior matrix is medium to coarse grained, and medium gray in color. Abundant green crystals, and minor amounts of metal and oxidation characterize this eucrite.
Thin Section (,8) Description: Brian Mason The section shows a uniform fine-grained aggregate of granular pyroxene and acicular plagioclase (plagioclase needles up to 0.3 mm long). The proportion of pyroxene to plagioclase is approximately 2:1. Microprobe analyses show pyroxene compositions ranging fairly continuously from Wo5Fs5 6 to Wo30Fs35, the range in En content being quite limited. Plagioclase composition is somewhat variable, An80-91. The meteorite is a eucrite.
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| Data from: MB76 Table 2 Line 4869: |
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| References: | Published in Antarctic Meteorite Newsletter 15(2) (1992), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:
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Statistics: This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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| Revision history: |
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