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| Pecora Escarpment 91084 | |||||||||||||||||||||||||
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| Basic information | Name: Pecora Escarpment 91084 This is an OFFICIAL meteorite name. Abbreviation: PCA 91084 Observed fall: No Year found: 1991 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  34.4 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 636 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 16(1):
Sample No.: PCA91084; 91147; 91203 Location: Pecora Escarpment Dimensions (cm): 4.5 x 3.2 x 1.5; 1.6 x 1.0 x 0.8; 2.1 x 1.5 x 1 Weight (g): 34.4; 2.8; 4.2 Meteorite Type: C2 Chondrite
Macroscopic Description: Cecilia Satterwhite and Robbie Marlow Less than half of the exterior of these specimens are covered with black shiny fusion crust. The interior matrices are jet black and contain numerous small inclusions/chondrules. Evaporite deposits are present on the interior surfaces of 91084 and 91203.
Thin Section (91084,2; 91147,2; 91203,2) Description: Brian Mason These sections are so similar that one description suffices; the meteorites are probably paired. They show numerous chondrules, up to 0.6 mm across, irregular aggregates, and mineral grains in a black carbonaceous matrix. The minerals are mainly olivine, with minor pyroxene. Olivine compositions are mostly near Mg2SiO4, but occasional iron-rich grains are analyzed, up to Fa59. Pyroxene compositions range from Fs1 to Fs9. The meteorites are C2 chondrites.
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| Data from: MB76 Table 2 Line 4933: |
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| References: | Published in Antarctic Meteorite Newsletter 16(1) (1993), 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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