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Northwest Africa 13646
Basic information Name: Northwest Africa 13646
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13646
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 688 g
Classification
  history:
Recommended:  LL4-6    [explanation]

This is 1 of 72 approved meteorites classified as LL4-6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13646 (NWA 13646)

(Northwest Africa)

Purchased: 2020 Nov

Classification: Ordinary chondrite (LL4-6)

History: The meteorite was purchased from a dealer in Morocco.

Physical characteristics: Dark grayish rock with some fusion crust.

Petrography: The meteorite is a chondritic breccia consisting of up to 2 mm sized LL6 clasts set into brecciated LL4 groundmass. Plagioclase grain size in type 6 clasts is about 60 µm. Chondrules have a mean diameter of about 0.8 mm. Olivine is compositionally equilibrated in both litholgies; low-Ca-pyroxene is unequilibrated in LL4 groundmass. Contains minor sulfides and FeNi metal.

Geochemistry: type 4 lithology: olivine: Fa29.6±0.2, n =7; pyroxene: Fs21.7±3.8Wo1.7±0.8 (Fs8.8-24.2Wo0.7-2.6, n=18); type 6 lithology: olivine: Fa29.6±0.1, n=5; pyroxene: Fs24.0±0.5Wo2.4±0.3, n=5

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 Nov
Mass (g):688
Pieces:1
Class:LL4-6
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):29.6; 29.6
Ferrosilite (mol%):21.7; 24.0
Wollastonite (mol%):1.7; 2.4
Classifier:A. Greshake, MNB
Type spec mass (g):26.4
Type spec location:MNB
Main mass:Hanno Strufe and Andreas Grünemeyer
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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