Meteoritical Bulletin: Entry for LaPaz Icefield 03782

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LaPaz Icefield 03782

Basic information

Name: LaPaz Icefield 03782
This is an OFFICIAL meteorite name.
Abbreviation: LAP 03782
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 22.3 g

Classification
history:

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

This is 1 of 138 approved meteorites classified as Eucrite-unbr. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Writeup

Writeup from AMN 27(3):

Sample No.:	LAP 03782
Location:	LaPaz Ice Field
Field No.:	16082
Dimensions (cm):	2.5x2.5x1.75
Weight (g):	22.269
Meteorite Type:	Eucrite (Unbrecciated)

Macroscopic Description: Kathleen McBride
The exterior of this eucrite has about 40% thin, black, shiny fusion crust. The interior has a dense crystalline matrix with minor rust and is very hard.

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


Cross-Polarized Light	Plane-Polarized Light

This meteorite exhibits a granoblastic texture, with pyroxenes reaching 1.5 mm and plagioclase 1.0 mm, although most grains are smaller. Pyroxenes are exsolved on the scale of 1-20 microns, with orthopyroxene (Fs₅₈Wo₄), with lamellae of augite (Fs₃₀Wo₃₇), and plagioclase (An₉₀Or_0.2). The Fe/Mn ratio of the pyroxene is ~30. Staining by hydrated iron oxides is pervasive. The meteorite is an unbrecciated eucrite.

Data from:
  MB89
  Table A1
  Line 249:

Origin or pseudonym:	Paradise Palms
Mass (g):	22.27
Class:	Euc-ub
Weathering grade:	A/B
Ferrosilite (mol%):	30-58

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 44547 approved meteorites from Antarctica (plus 3802 unapproved names)

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Revision
history:

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