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Northwest Africa 10255
Basic information Name: Northwest Africa 10255
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10255
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 1995 g
Meteoritical Bulletin:  MB 104  (2015)  LL3
Recommended:  LL3    [explanation]

This is 1 of 371 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 28 Aug 2015
Writeup from MB 104:

Northwest Africa 10255 (NWA 10255)

(Northwest Aftica)

Purchased: 2015 Feb

Classification: Ordinary chondrite (LL3)

History: Purchased by Aerolite Meteorites

Physical characteristics: Single stone, saw cut and polished slices reveal many densely packed chondrules of variable size set in a dark brown groundmass. Largest chondrules up to 10 mm in diameter.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, many with porphyritic, igneous-zoned olivines and pyroxenes. Apparent mean chondrule size 850±450 μm (in microprobe section), n=25. A few very fine-grained plagioclase grains were observed. Fe-Ni metal, troilite, and chromite are present.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa24.2±8.3, Fe/Mn=63±25, Cr2O3=0.07±0.09 wt%, n=30, low-Ca pyroxene Fs11.1±8.4Wo0.5±0.3, Fe/Mn=20±12, n=12.

Classification: Ordinary chondrite LL3, estimated type 3.4 based on mean values and 1-sigma of Fa and Fs.

Specimens: 31.47 g including a probe mount on deposit at UNM, Aerolite Meteorites holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015 Feb
Mass (g):1995.1
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):24.2±8.3
Ferrosilite (mol%):11.1±8.4
Wollastonite (mol%):0.5±0.3
Classifier:C. Agee, UNM
Type spec mass (g):31.47
Type spec location:UNM
Main mass:Aerolite Meteorites Inc.
Comments:AE-2; submitted by C. Agee
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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