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Northwest Africa 12816
Basic information Name: Northwest Africa 12816
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12816
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 2.02 kg
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 515 approved meteorites classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 18 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12816 (NWA 12816)

(Northwest Africa)

Purchased: 2019

Classification: Carbonaceous chondrite (CO3)

History: The meteorite was purchased from a local meteorite dealer in Algeria.

Physical characteristics: Brownish fragment without fusion crust.

Petrography: The meteorite shows a dark brownish to black interior and is composed of abundant small chondrules, CAIs, and mineral fragments set into a fine-grained matrix. Chondrules are dominantly porphyritic type I with a mean diameter of about 0.2 mm. Some sulfides and FeNi metal are present in matrix and chondrules.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2019
Mass (g):2024
Pieces:1
Class:CO3
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):19.0±20.6 (0.8-54.7, n=15)
Ferrosilite (mol%):1.5±0.5 (0.9-2.3, n=17)
Wollastonite (mol%):1.0±0.4 (0.5-1.4, n=17)
Classifier:A. Greshake, MNB
Type spec mass (g):20.8
Type spec location:MNB
Main mass:Marcin Cimala
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
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 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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