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Northwest Africa 12814
Basic information Name: Northwest Africa 12814
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12814
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 1235 g
Classification
  history:
Recommended:  CK4    [explanation]

This is 1 of 105 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 18 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12814 (NWA 12814)

(Northwest Africa)

Purchased: 2019

Classification: Carbonaceous chondrite (CK4)

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

Physical characteristics: Grayish rock partly covered with fusion crust.

Petrography: The meteorite displays a greyish to slightly greenish interior and is predominantly consists of fine-grained recrystallized matrix dominated by ferrous olivine. Few chondrules with a mean diameter of about 700 µm are present. While olivine is equilibrated throughout the meteorite, low-Ca pyroxene shows compositional zoning in matrix and chondrules. Minor phases include intermediate plagioclase, Ca-pyroxene, and troilite. Cr-rich magnetite is abundant; metal is virtually absent.

Geochemistry: olivine: Fa26.9±0.4 (FeO/MnO=97±10, n=15); low-Ca pyroxene: Fs15.1±6.5Wo1.8±1.2 (Fs3.4-22.5Wo0.8-4.2, n=19); Ca-pyroxene: Fs1.4±0.1Wo42.3±1.6, n=10; feldspar: An38.0±7.3Ab59.5±6.6Or2.5±0.7, n=11

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):1235
Pieces:1
Class:CK4
Shock stage:S2
Weathering grade:low
Fayalite (mol%):26.9
Ferrosilite (mol%):15.1; 1.4
Wollastonite (mol%):1.8; 42.3
Classifier:A. Greshake, MNB
Type spec mass (g):27.3
Type spec location:MNB
Main mass:Martin Goff
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 6968 approved meteorites from (Northwest Africa) (plus 2012 unapproved names)

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