Meteoritical Bulletin: Entry for LaPaz Icefield 031097

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LaPaz Icefield 031097

Basic information

Name: LaPaz Icefield 031097
This is an OFFICIAL meteorite name.
Abbreviation: LAP 031097
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 2.1 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 29(1)	(2006)	H3
Meteoritical Bulletin:	MB 91	(2007)	H3
Recommended:			H3 [explanation]

This is 1 of 710 approved meteorites (plus 2 unapproved names) classified as H3. [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 21 Feb 2005

Writeup

Writeup from AMN 29(1):

Sample No.:	LAP 031097
Location:	LaPaz Ice Field
Field No.:	16432
Dimensions (cm):	1.25x1.0x0.75
Weight (g):	2.058
Meteorite Type:	H3 Chondrite

Macroscopic Description: Kathleen McBride
50% of this ordinary chondrite's exterior has brown/black fusion crust with oxidation halos. The interior has a black matrix with rust and mm sized gray chondrules.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach

Cross-Polarized Light	Plane-Polarized Light

The section exhibits numerous well-defined chondrules (up to 1.5 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is extremely abundant. Silicates are unequilibrated; olivines range from Fa_6-37, with most grains Fa₁₈, and pyroxenes from Fs_8-22. The meteorite is an H3 chondrite (estimated subtype 3.8).

Data from:
  MB91
  Table 4
  Line 560:

Mass (g):	2.1
Class:	H3
Weathering grade:	B
Fayalite (mol%):	6-37
Ferrosilite (mol%):	8-22

Catalogs:

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

References:

Published in Antarctic Meteorite Newsletter 29(1) (2006), JSC, Houston
Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)

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Photos:

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

Geography:

Antarctica

Coordinates:

Unknown.

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

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Revision
history:

This lists important revisions made to data for this record.

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