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Pecora Escarpment 91327
Basic information Name: Pecora Escarpment 91327
     This is an OFFICIAL meteorite name.
Abbreviation: PCA 91327
Observed fall: No
Year found: 1991
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 5.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 16(2)  (1993)  C2
Meteoritical Bulletin:  MB 76  (1994)  C2
NHM Catalogue:  5th Edition  (2000)  C2
MetBase:  v. 7.1  (2006)  C2
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  CM2
Recommended:  CM2    [explanation]

This is 1 of 541 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeuphelp
Writeup from AMN 16(2):

Sample No.: PCA91327

Location: Pecora Escarpment

Dimensions (cm): 2.0 x 1.5 x 1.3

Weight (g): 5.2

Meteorite Type: C2 chondrite

 

Macroscopic Description: Robbie Marlow

PCA91327 has dull, black, frothy fusion crust covering 40% of the exterior surface. The interior matrix is black, fine-grained, and friable. Abundant white inclusions are scattered throughout.

 

Thin Section (,2) Description: Brian Mason

The' section shows chondrules, up to 0.9 mm across, irregular aggregates, and small mineral grains in a black matrix. The minerals are mainly olivine, with minor pyroxene. Olivine compositions are mostly near MgSiO4, but occasional iron-rich grains were analyzed, up to Fa42. Pyroxene compositions range from Fs0.2 to Fs1.1. The matrix appears to be largely iron-rich serpentine. The meteorite is a C2 chondrite.

 

Data from:
  MB76
  Table 2
  Line 5120:
Origin or pseudonym:Kink Bowl
Mass (g):5.2
Class:C2
Weathering grade:A
Fayalite (mol%):1-42
Ferrosilite (mol%):0.5-1.1
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 16(2) (1993), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (85° 38'S, 68° 42'W)
     Recommended::   (85° 40' 41"S, 69° 4' 4"W)
Note: the NHM and MetBase coordinates are 5.9 km apart

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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