Meteoritical Bulletin: Entry for LaPaz Icefield 02277

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LaPaz Icefield 02277

Basic information

Name: LaPaz Icefield 02277
This is an OFFICIAL meteorite name.
Abbreviation: LAP 02277
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 7.8 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 27(3)	(2004)	CM1
Meteoritical Bulletin:	MB 89	(2005)	CM1
MetBase:	v. 7.1	(2006)	CM1
Recommended:			CM1 [explanation]

This is 1 of 27 approved meteorites classified as CM1. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 1), CM chondrites, and CM-CO clan chondrites

Writeup

Writeup from AMN 27(3):

Sample No.:	LAP 02277
Location:	LaPaz Ice Field
Field No.:	15432
Dimensions (cm):	2.5x2.0x1.5
Weight (g):	7.756
Meteorite Type:	CM1 Chondrite

Macroscopic Description: Kathleen McBride
70% of the exterior is covered with rough purplish black fractured fusion crust. The interior of this carbonaceous chondrite has a black, chalky matrix with black to dark gray inclusions.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan
The section consists of a few small chondrules (up to 0.5 mm) that have been completely replaced by phyllosilicate set in an Fe-rich serpentine matrix. No isolated mineral grains or CAIs are apparent; sulfide and carbonate grains are present. Unaltered olivine or pyroxene grains of sufficient size for microprobe analyses were not found. The meteorite is a highly altered CM chondrite probably of petrologic type 1.


LAP 02277 Cross-Polarized Light	LAP 02277 Plane-Polarized Light	LAP 02277 Reflected Light

Data from:
  MB89
  Table A1
  Line 87:

Mass (g):	7.76
Class:	CM1
Weathering grade:	A

Catalogs:

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

References:

Published in Antarctic Meteorite Newsletter 27(3) (2004), JSC, Houston
Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)

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Photos:

Credit	Photos
Photographs from AMN:
Photograph from unknown source	A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
Dr Carlton Allen, JSC-KT, NASA

Geography:

Antarctica

Coordinates:
Recommended::	(86° 22'S, 70° 0'W)

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

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