Meteoritical Bulletin: Entry for LaPaz Icefield 03780

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LaPaz Icefield 03780

Basic information

Name: LaPaz Icefield 03780
This is an OFFICIAL meteorite name.
Abbreviation: LAP 03780
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 21.8 g

Classification
history:

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

This is 1 of 83 approved meteorites classified as Aubrite. [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites

Writeup

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Writeup from AMN 27(3):

Sample No.:	LAP 03780; LAP 031269; LAP 031372
Location:	LaPaz Icefield
Field No.:	16745; 16191; 16719
Dimensions (cm):	3.5x2.5 x 2.0 2.5x2.5x2.0 3.0x2.0x2.5
Weight (g):	21.807; 12.930; 17.613
Meteorite Type:	Aubrite

Macroscopic Description: Kathleen McBride
The exteriors are white without any fusion crust. The interiors are white matrix with brown circular to oval shaped inclusions.

Thin Section (,2) Description: Tim McCoy, Linda Welzenbach
The sections consist of an aggregate of coarse (up to 5 mm), heavily shocked enstatite grains with minor to trace abundances of diopside, metal, troilite, alabandite, and daubreelite. Silicates are essentially FeO-free enstatite (Fs₀Wo₁) and diopside (Fs₀Wo₄₃). The meteorites are aubrites and may be paired with LAP 02233. They were found over a range of 1.5 km.


LAP 03780 Cross-Polarized Light	LAP 03780 Plane-Polarized Light	LAP 031269 Cross-Polarized Light

LAP 031269 Plane-Polarized Light	LAP 031372 Cross-Polarized Light	LAP 031372 Plane-Polarized Light

Data from:
  MB89
  Table A1
  Line 248:

Origin or pseudonym:	Pinnacle Vista Estates
Mass (g):	21.81
Class:	Aub
Weathering grade:	B/C
Ferrosilite (mol%):	0
Comments:	02233 pairing group

Catalogs:

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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

Antarctica

Coordinates:
Recommended::	(86° 22'S, 70° 0'W)

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

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