header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 11 Oct 2019
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
LaPaz Icefield 03639
Basic information Name: LaPaz Icefield 03639
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 03639
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 139.9 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 29(2)  (2006)  R
Meteoritical Bulletin:  MB 92  (2007)  R
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  R4
Recommended:  R4    [explanation]

This is 1 of 58 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 1 Sep 2006
Writeuphelp
Writeup from AMN 29(2):
Sample No.: LAP 03639; LAP 03731; LAP 03793; LAP 03902; LAP 031144; LAP 031387; LAP 04845
Location: LaPaz Ice Field
Field No.: 16019; 16519; 16071; 16379; 16623; 16593; 17199
Dimensions (cm):   9.0x5.5x3.6; 4.0x2.5x3.0; 3.0x2.0x2.0; 2.0x1.5x1.25; 1.5x1.0x1.0; 1.25x0.5x1.0; 1.5x1.0x0.75
Weight (g): 139.938; 55.963; 15.043; 6.162; 2.479; 1.093; 1.137
Meteorite Type: R Chondrite


Macroscopic Description: Kathleen McBride and Cecilia Satterwhite
The exteriors of these R chondrites have brown/black fusion crust with some evaporites. The interiors are gray with some large light and dark inclusions. Some oxidation and rust is present.


Thin Section (,2) Description: Valerie Reynolds and Tim McCoy
The sections are so similar that a 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). Olivines are nearly homogeneous (Fa35-38, with a small tail of analyses down to Fa6) and pyroxenes exhibit a larger range (Fs1-30). The meteorites are R chondrites, probably of petrologic type 4.



Thin Section Images

Cross-Polarized
Light LAP 03639
Plane-Polarized Light
LAP 03639
Cross-Polarized Light
LAP 03731
Plane-Polarized Light
LAP 03731
LAP 03639 - Cross-Polarized Light LAP 03639 - Plane-Polarized Light
LAP 03731 - Cross-Polarized Light LAP 03731 - Plane-Polarized Light
Cross-Polarized
Light LAP 03793
Plane-Polarized Light
LAP 03793
Cross-Polarized Light
LAP 03902
Plane-Polarized Light
LAP 03902
LAP 03793 - Cross-Polarized Light LAP 03793 - Plane-Polarized Light
LAP 03902 - Cross-Polarized Light LAP 03902 - Plane-Polarized Light
Cross-Polarized Light
LAP 031144
Plane-Polarized Light
LAP 031144
Cross-Polarized Light
LAP 031387
Plane-Polarized Light
LAP 031387
LAP 031144 - Cross-Polarized Light LAP 031144 - Plane-Polarized Light
LAP 031387 - Cross-Polarized Light LAP 031387 - Plane-Polarized Light
Cross-Polarized Light
Light LAP 04845
Plane-Polarized Light
Light LAP 04845
LAP 04845 - Cross-Polarized Light LAP 04845 - Plane-Polarized Light



Lab Images

LAP 03639
LAP 03731 Image Interior
LAP 03793 Image North
LAP 03902Image North
LAP 031144 Image North
LAP 031387 Image North
LAP 04845 Image North

Data from:
  MB92
  Table 3
  Line 124:
Mass (g):139.9
Class:R
Weathering grade:A/B
Fayalite (mol%):19-38
Ferrosilite (mol%):13-29
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 29(2) (2006), JSC, Houston
Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photographs from AMN:
JSC A photo is in the write-up above
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)

Direct link to this page