Meteoritical Bulletin: Entry for LaPaz Icefield 031280

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LaPaz Icefield 031280

Basic information

Name: LaPaz Icefield 031280
This is an OFFICIAL meteorite name.
Abbreviation: LAP 031280
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 17.8 g

Classification
history:

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

This is 1 of 224 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 21 Feb 2006

Writeup

Writeup from AMN 29(1):

Sample No.:	LAP 031280
Location:	LaPaz Ice Field
Field No.:	16046
Dimensions (cm):	4.0x2.75x1.0
Weight (g):	17.752
Meteorite Type:	Eucrite (Brecciated)

Macroscopic Description: Kathleen McBride
Shiny, rough brown/black fusion crust covers 50% of this achondrite's exterior. The interior is a sandy textured, tan colored matrix with gray inclusions.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
The meteorite is a dominated by a fine-grained (50-100 micron grain size) basaltic host with coarser-grained areas that may be clasts incorporated prior to metamorphism. Pyroxene is exsolved on a 1-20 micron scale. Orthopyroxene analyses range to Fs₆₀Wo₅ and augite to Fs₃₂Wo₄₀. Plagioclase is An₈₈Or_0.5. The Fe/Mn ratio of the pyroxene is ~30. The meteorite is a eucrite.

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

Data from:
  MB91
  Table 4
  Line 647:

Mass (g):	17.8
Class:	Euc (brecciated)
Weathering grade:	B
Ferrosilite (mol%):	60

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)

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 44048 approved meteorites from Antarctica (plus 3802 unapproved names)

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