Meteoritical Bulletin: Entry for Pecora Escarpment 01027

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Pecora Escarpment 01027

Basic information

Name: Pecora Escarpment 01027
This is an OFFICIAL meteorite name.
Abbreviation: PCA 01027
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by Planetary Studies Foundation (US)]
Mass: 4.5 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	EH4
Recommended:			EH4 [explanation]

This is 1 of 21 approved meteorites classified as EH4. [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites

Comments:

Approved 19 Jan 2012

Writeup

Writeup from MB 100:

Pecora Escarpment 01027 (PCA 01027) 85°39.112’S, 68°38.510’W

Antarctica

Found: 2002 Jan 20

Classification: Enstatite chondrite (EH4)

Petrography: Small, separated well-formed RP chondrules and some mineral fragments are set in a dark red-brown to black matrix. Accessory minerals include kamacite, daubreelite, Cr-bearing troilite (some Ti-bearing), schreibersite and perryite. Kamacite contains 2.8 to 3.1 wt% Si and 2.8 to 3.5 wt% Ni.

Geochemistry: Orthopyroxene Fs_0.9Wo_0.1and Fs_6.2Wo_3.7.

Classification: EH4. Almost identical to PCA 01023 and very likely paired with it.

Specimens: Remaining stone plus one polished thin section at FMNH

Data from:
  MB100
  Table 1
  Line 1767:

Origin or pseudonym:	Pecora Escarpment
Date:	2002 Jan 20
Latitude:	85°39.112'S
Longitude:	68°38.510'W
Mass (g):	4.5
Pieces:	1
Class:	EH4
Shock stage:	S2
Weathering grade:	W1
Ferrosilite (mol%):	0.9; 6.2
Wollastonite (mol%):	0.1; 3.7
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	4.5
Type spec location:	FMNH
Main mass:	FMNH
Finder:	R. Garriott
Comments:	Submitted by P. Sipiera

Institutions
and collections

FMNH: Department of Geology The Field Museum of Natural History 1400 South Lake Shore Drive Chicago, IL 60605-2496, USA, United States; Website (institutional address; updated 16 Nov 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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Geography:

Antarctica

Coordinates:
Recommended::	(85° 39' 7"S, 68° 38' 31"W)

Statistics:
This is 1 of 43856 approved meteorites from Antarctica (plus 3802 unapproved names)

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