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Northwest Africa 12975
Basic information Name: Northwest Africa 12975
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12975
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 228 g
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 323 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 2 Nov 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12975 (NWA 12975)

(Northwest Africa)

Purchased: 2019 Jul

Classification: Ordinary chondrite (LL3)

Petrography: (K. Metzler, IfP) Brecciated ordinary chondrite of low petrologic type. It consists of chondrules (up to 3.5 mm), chondrule fragments, mineral fragments, and mm-sized unequilibrated chondrite clasts, embedded in a fine-grained clastic matrix. The mean apparent chondrule size is 680 μm (n=53). Small amounts of Fe,Ni metal and troilite, mostly residing outside of chondrules.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa19.1±8.7 (Fa3.9-33.5; n=26); the mean low-Ca pyroxene composition is Fs14.0±6.8Wo0.8±0.8 (Fs5.6-24.3Wo0.1-2.8; n=11).

Classification: LL chondrite based on metal content and apparent chondrule size. Petrologic type based on the chemical variation of olivine (PMD of Fa values: 46), estimated LL3.5.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019 Jul
Mass (g):228
Pieces:1
Class:LL3
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):19.1±8.7
Ferrosilite (mol%):14.0±6.8
Wollastonite (mol%):0.8±0.8
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Mirko Graul, Bernau, Germany
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
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 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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