Meteoritical Bulletin: Entry for Pecora Escarpment 02007

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Pecora Escarpment 02007

Basic information

Name: Pecora Escarpment 02007
This is an OFFICIAL meteorite name.
Abbreviation: PCA 02007
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 22.4 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 26(2)	(2003)	Lunar (basaltic breccia)
Meteoritical Bulletin:	MB 88	(2004)	Lunar-anorthositic
MetBase:	v. 7.1	(2006)	Lunar (anorth)
Antarctic Meteorite Newsletter:	AMN 30(2)	(2007)	Lunar (anorthositic regolith breccia)
Recommended:			Lunar (anorth) [explanation]

This is 1 of 83 approved meteorites classified as Lunar (anorth). [show all]
Search for other: Lunar meteorites

Writeup

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Writeup from AMN 26(2):

Sample No.:	PCA 02007
Location:	Pecora Escarpment
Field No.:	13690
Dimensions (cm):	4.0x3.5x1.0
Weight (g):	22.372
Meteorite Type:	Lunar-Basaltic Breccia

PCA02007

PCA02007

Macroscopic Description: Kathleen McBride
This is a disk shaped meteorite with brown exterior on the top portion of the rock. The bottom face has tan colored, ropy glass with a frothy appearance. Polygonal fractures and various clasts of different sizes, shapes and colors can be seen. The interior is composed of a hard, dark gray matrix with white clasts. Underneath the tan ropy glass is a layer of shiny green glass.

Thin Section (,4) Description: Tim McCoy, Linda Welzenbach
The section consists of an extremely fine-grained (melt?) matrix with isolated mineral grains and fine- to coarse-grained basaltic clasts in all size ranges up to 2 mm. Microprobe analyses reveal olivine of Fa_27-33, pyroxene in a wide range of compositions from pigeonite Fs₅₀Wo₄ to augite of Fs₁₉Wo₄₃ with intermediate and more FeO-rich compositions, and plagioclase of An_64-100 (with the most An_96-100). The Fe/Mn ratio of the pyroxene averages ~53. The meteorite is a basaltic lunar breccia.


Plane-Polarized Light	Cross-Polarized Light	Plane-Polarized Light	Cross-Polarized Light


Plane-Polarized Light	Cross-Polarized Light	Plane-Polarized Light	Cross-Polarized Light

Data from:
  MB88
  Table A1
  Line 694:

Mass (g):	22.372
Class:	Lunar-A
Weathering grade:	B
Ferrosilite (mol%):	19-50

Catalogs:

Search for this meteorite in the NASA/JSC database (U.S.):

References:

Published in Antarctic Meteorite Newsletter 26(2) (2003), JSC, Houston
Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)

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Photos:

Credit	Photos
Photographs from AMN:
Photograph from unknown source	A photo is in the write-up above

Geography:

Antarctica

Antarctica

Coordinates:
Recommended::	(85° 38'S, 68° 42'W)

Statistics:
This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)

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Revision
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