Meteoritical Bulletin: Entry for LaPaz Icefield 04612

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LaPaz Icefield 04612

Basic information

Name: LaPaz Icefield 04612
This is an OFFICIAL meteorite name.
Abbreviation: LAP 04612
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 22.4 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 30(2)	(2007)	L3
Meteoritical Bulletin:	MB 94	(2008)	L3
Recommended:			L3 [explanation]

This is 1 of 848 approved meteorites (plus 2 unapproved names) classified as L3. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 31 Aug 2007

Writeup

Writeup from AMN 30(2):

Sample No.:	LAP 04612
Location:	LaPaz Ice Field
Field No.:	17003
Dimensions (cm):	3.5 x 2.5 x 1.5
Weight (g):	22.433
Meteorite Type:	L3 Chondrite

Macroscopic Description: Kathleen McBride
90% of this ordinary chondrite's exterior has brown/black fusion crust with oxidation haloes. The interior is a gray matrix with high metal content and numerous gray and white chondrules.

Thin Section (,2) Description: Tim McCoy, Lauren LaCroix and Linda Welzenbach
The section exhibits numerous large, well-defined chondrules (up to 3 mm) in a black matrix of fine-grained silicates, metal and troilite. Strong shock effects are present. The meteorite is moderately weathered. Silicates are unequilibrated; olivines range from Fa_8-25, with most grains Fa_20-22, and pyroxenes from Fs_4-19. The meteorite is an L3 chondrite (estimated subtype 3.8).

Thin Section Images

Plane-Polarized Light LAP 04612	Cross Polarized Light LAP 04612

Lab Images

Data from:
  MB94
  Table 4
  Line 159:

Mass (g):	22.433
Class:	L3
Weathering grade:	B
Fayalite (mol%):	8-25
Ferrosilite (mol%):	4-19

Catalogs:

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

References:

Published in Antarctic Meteorite Newsletter 30(2) (2007), JSC, Houston
Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)

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Photos:

Credit	Photos
Photographs from AMN:
JSC	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)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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