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Pecora Escarpment 82502 | |||||||||||||||||||||
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Basic information | Name: Pecora Escarpment 82502 This is an OFFICIAL meteorite name. Abbreviation: PCA 82502 Observed fall: No Year found: 1982 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 890 g | ||||||||||||||||||||
Classification history: |
This is 1 of 136 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||
Writeup |
Writeup from AMN 6(2):
Sample No.: PCAA82502 Location: Pecora Escarpment Field No.: 2713, 2770, 2788 Weight (gms): 890.4 Meteorite Type: Eucrite (unbrecciated)
Physical Description: Carol Schwarz PCAA82502 consists of 3 pieces that have areas of extremely shiny fusion crust. These 3 pieces do not fit together, but it is obvious they are paired. The interiors of the fragments have a light gray matrix with darker gray inclusions up to several mm across. No weathering is evident, except that the exterior surfaces are darker gray than the interior surfaces. Dimensions: 6 x 4.5 x 2.8 cm; 4.5 x 4.3 x 3 cm; 11 x 8.5 x 8 cm
Petrographic Description: Brian Mason The section shows a fine-grained ophitic intergrowth of pigeonite and plagioclase (average length of plagioclase laths is about 0.1 mm). Small areas of somewhat coarser material may be partly digested clasts of similar composition. Trace amounts of nickel-iron and troilite are present, as minute grains. Microprobe analyses show pyroxene compositions ranging fairly continuously from Wo5En34Fs61 to Wo34En30Fs36, the range in En content being quite limited. Plagioclase composition is An8-23. The meteorite is a eucrite and is unbrecciated in thin section; it is possibly a fine-grained variant of PCAA80501 [sic]. [Correction in AMN 7(1):] PCA 82502 - Ab 8-23 | ||||||||||||||||||||
Data from: MB76 Table 2 Line 4836: |
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Catalogs: |
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References: | Published in Antarctic Meteorite Newsletter 6(2) (1983), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography: |
Statistics: This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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Revision history: |
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