Meteoritical Bulletin: Entry for LaPaz Icefield 031135

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LaPaz Icefield 031135

Basic information

Name: LaPaz Icefield 031135
This is an OFFICIAL meteorite name.
Abbreviation: LAP 031135
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 2.7 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 29(1)	(2006)	R
Meteoritical Bulletin:	MB 91	(2007)	R
Antarctic Meteorite Newsletter:	AMN 31(1)	(2008)	R4
Recommended:			R4 [explanation]

This is 1 of 68 approved meteorites classified as R4. [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)

Comments:

Approved 21 Feb 2006

Writeup

Writeup from AMN 29(1):

Sample No.:	LAP 031135; LAP 031156
Location:	LaPaz Ice Field
Field No.:	16617; 16357
Dimensions (cm):	1.75x1.0x0.75 2.5x2.5x1.5
Weight (g):	2.727; 14.651
Meteorite Type:	R Chondrite

Macroscopic Description: Kathleen McBride
Exteriors are covered with fractured black fusion crust. The interiors consist of fine grained gray matrix with dark gray inclusions.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
The sections are so similar that single description suffices. The sections consist of ~50% of well-defined, small (up to 1 mm) chondrules set in a slightly recrystallized matrix of silicates and sulfides (both troilite and pentlandite). Olivine is homogeneous (Fa_39-40) and pyroxene exhibits a small range (Fs_21-31). The meteorites are R chondrites, probably of petrologic type 4.

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

Cross-Polarized Light	Plane-Polarized Light

Data from:
  MB91
  Table 4
  Line 585:

Mass (g):	2.7
Class:	R
Weathering grade:	A
Fayalite (mol%):	40
Ferrosilite (mol%):	21-30

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 44547 approved meteorites from Antarctica (plus 3802 unapproved names)

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