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| Pecora Escarpment 91081 | |||||||||||||||||||||||||
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| Basic information | Name: Pecora Escarpment 91081 This is an OFFICIAL meteorite name. Abbreviation: PCA 91081 Observed fall: No Year found: 1991 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  37.8 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 104 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 16(1):
Sample No.: PCA91081 Location: Pecora Escarpment Dimensions (cm): 3.4 x 3.9 x 2.0 Weight (g): 37.8 Meteorite Type: Eucrite
Macroscopic Description: Cecilia Satterwhite Thirty percent of this meteorite is covered with black fusion crust that is shiny in some areas. Areas devoid of fusion crust have a rough texture, and are medium gray. The interior is light to medium gray with abundant light and dark gray inclusions. Minor amount of evaporite deposit is present.
Thin Section (,2) Description: Brian Mason The section shows a fine-grained ophitic intergrowth of pyroxene 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. Microprobe analyses show pyroxene compositions ranging fairly continuously from Wo3Fs62 to Wo27Fs40, the range in En content being quite limited. Plagioclase composition is An86-91. The meteorite is a eucrite; it is very similar to PCA82502, and the possibility of pairing should be considered. PCA91083 is paired with 91081.
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| Data from: MB76 Table 2 Line 4930: |
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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 40744 approved meteorites from Antarctica (plus 4494 unapproved names) | ||||||||||||||||||||||||
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