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LaPaz Icefield 10031
Basic information Name: LaPaz Icefield 10031
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 10031
Observed fall: No
Year found: 2010
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12.3 g
Antarctic Meteorite Newsletter:  AMN 34(2)  (2011)  R6
Meteoritical Bulletin:  MB 100  (2012)  R6
Recommended:  R6    [explanation]

This is 1 of 13 approved meteorites classified as R6.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 10 Sep 2011
Writeup from AMN 34(2):
Sample Number LAP 10031
Newsletter 34,2
Location LaPaz Icefield
Field Number 22335
Dimensions 2.9 x 2.0 x 1.5
Weight 12.338
Original Classification R6 Chondrite
Pairing LAP 10031, LAP 10033
Macroscopic Description - Cecilia Satterwhite
Both of these meteorites have brown/black fusion crust frothy in areas and some oxidation. Areas without fusion crust are a mottled gray color. The mottled gray matrix has numerous dark inclusions.
Thin Section (,2) Description - Cari Corrigan, Linda Welzenbach and Nicole Lunning
These sections are texturally heterogeneous, containing relict chondrules up to 1 mm, isolated mineral grains of 100-200 microns and microcrystalline areas reaching 1 mm with mafic silicate grain sizes of 5-10 microns. Shock effects are pervasive, particularly in plagioclase. The rock consists of FeO-rich olivine (Fa38-39) and orthopyroxene (Fs30-32Wo1). Plagioclase is An8-63Or1-3. Brown, strongly pleochroic hornblende comprises ~15% of the section. Opaques include troilite, pentlandite and chromite. The meteorite is an R chondrite of petrologic type 6. These are likely paired with LAP 04840.
Antarctic Meteorite Images for Sample LAP 10031
Lab Photo of Sample LAP 10031 Showing Post-processing View  Lab Photo of Sample LAP 10031 Showing Bottom View  Lab Photo of Sample LAP 10031 Showing East View  Lab Photo of Sample LAP 10031 Showing North View 
Lab Photo of Sample LAP 10031 Showing South View 
Data from:
  Table 1
  Line 554:
Mass (g):12.3
Weathering grade:A/B
Fayalite (mol%):39
Ferrosilite (mol%):32
Type spec mass (g):12.3
Type spec location:JSC
Main mass:JSC
Comments:Submitted by AMN
   and collections
JSC: Mailcode KT, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 3 Sep 2013)
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 34(2) (2011), JSC, Houston
Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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     This is 1 of 40849 approved meteorites from Antarctica (plus 4494 unapproved names)

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