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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:help 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 67 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 21 Feb 2006
Writeuphelp
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
LAP 031135 LAP 031156


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 (Fa39-40) and pyroxene exhibits a small range (Fs21-31). The meteorites are R chondrites, probably of petrologic type 4.

Cross-Polarized LightPlane-Polarized LightCross-Polarized LightPlane-Polarized Light
LAP 031135 - Cross-Polarized Light LAP 031135 - Plane-Polarized Light
 LAP 031135 - Cross-Polarized Light LAP 031135 - Plane-Polarized Light

Cross-Polarized LightPlane-Polarized Light
LAP 031156 - Cross-Polarized Light LAP 031156 - 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:
CreditPhotos
Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 43856 approved meteorites from Antarctica (plus 3802 unapproved names)

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