Meteoritical Bulletin: Entry for LaPaz Icefield 031022

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LaPaz Icefield 031022

Basic information

Name: LaPaz Icefield 031022
This is an OFFICIAL meteorite name.
Abbreviation: LAP 031022
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 4.2 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 28(2)	(2005)	CM2
Meteoritical Bulletin:	MB 91	(2007)	CM2
Recommended:			CM2 [explanation]

This is 1 of 625 approved meteorites classified as CM2. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites

Comments:

Approved 1 Sep 2005

Writeup

Writeup from AMN 28(2):

Sample No.:	LAP 031022
Location:	LaPaz Ice Field
Field No.:	16018
Dimensions (cm):	2.5x1.5x1.0
Weight (g):	4.158
Meteorite Type:	CM2 Chondrite

Macroscopic Description: Kathleen McBride
The meteorite has black patches of fusion crust over 20% of its surface. The charcoal gray matrix contains white specks.

Thin Section (,2) Description: Tim McCoy
The section consists of numerous small chondrules (up to 1 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Chondrules exhibit relatively little alteration and are set in a matrix of serpentine. Olivine compositions are Fa_1-12, with a peak at Fa_0-2; a single pyroxene is Fs₁. The meteorite is a CM2 chondrite.


LAP 031022 Cross-Polarized Light	LAP 031022 Reflected Light	LAP 031022 Reflected Light

Data from:
  MB91
  Table 4
  Line 491:

Mass (g):	4.2
Class:	CM2
Weathering grade:	B
Fayalite (mol%):	1-12
Ferrosilite (mol%):	1

Catalogs:

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

References:

Published in Antarctic Meteorite Newsletter 28(2) (2005), JSC, Houston
Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)

Find references in NASA ADS:
Find references in Google Scholar:

Photos:

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

Geography:

Antarctica

Coordinates:

Unknown.

Statistics:
This is 1 of 43857 approved meteorites from Antarctica (plus 3802 unapproved names)

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