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Northwest Africa 12530
Basic information Name: Northwest Africa 12530
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12530
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 15.2 g
Classification
  history:
Recommended:  L3-5    [explanation]

This is 1 of 17 approved meteorites (plus 1 unapproved name) classified as L3-5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 26 Apr 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12530 (NWA 12530)

(Northwest Africa)

Purchased: 2018

Classification: Ordinary chondrite (L3-5)

History: One stone of 15.1 g was received by Erich Haiderer in Bavaria, Germany, in late 2018 from an anonymous Moroccan dealer, who reported that the rock came from the Sahara.

Petrography: (A. Bischoff, IfP) The rock is brecciated and has a chondritic texture with chondrules (mean diameter about 0.6 mm) in a fine-grained matrix that contains sulfides and FeNi metals. The metal abundance is about 4 vol% and certainly significantly below the abundance in H chondrites. Besides the chondrule size, the metal contents are consistent with an L-group classification. The sample shows only minor weathering.

Geochemistry: (K. Klemm; A. Bischoff, IfP) The breccia contains fragments of different petrologic type, some unequilibrated, but most are equilibrated and type L5. The equilibrated type-5 fragments have mean olivine and pyroxene compositions of Fa22.8 and Fs19.4, respectively. Random measurements of olivine grains revealed Fa20.5±5.8 (Fa5.2-24.4); n=9. Random measurements of low-Ca pyroxene grains revealed Fs15.3±6.6Wo1.2±0.7 (Fs2.4-20.0Wo0.3-2.4); n=10.

Classification: Ordinary chondrite (L3-5). The classification is based on chondrule size, metal abundance, brecciated texture, and mineral chemistry.

Data from:
  MB108
  Table 0
  Line 0:
Origin or pseudonym:Desert
Place of purchase:Bavaria, Germany
Date:P 2018
Mass (g):15.2
Pieces:1
Class:L3-5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):20.5±5.8 (n=9)
Ferrosilite (mol%):15.3±6.6 (n=10)
Wollastonite (mol%):1.2±0.7 (n=10)
Classifier:K. Klemm, A. Bischoff, IfP
Type spec mass (g):15.2
Type spec location:IfP
Main mass:IfP
Finder:anonymous
Comments:Working Name: JUSF018; submitted by Ebert S.
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Haiderer: Erich Haiderer Laboratory, P.O. Box 88, A-1140 Vienna, Austria (private address; updated 7 Jan 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2061 unapproved names)

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