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Northwest Africa 10512
Basic information Name: Northwest Africa 10512
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10512
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 60 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  CK4
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 27 Feb 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10512 (NWA 10512)

Morocco

Purchased: Dec. 2015

Classification: Carbonaceous chondrite (CK4)

History: Purchased by Ke Zuokai in Dec. 2015 from a Moroccan dealer.

Physical characteristics: One single stone. No fusion crust. Minimal weathering.

Petrography: A few chondrules set into abundant fine-grained matrix. Fe-rich olivine is the dominant mineral phase. Pyroxene usually is Ca-rich, and plagioclase is Na-rich. Accessory phases include Cr-bearing magnetite and sulfide. This sample does not have metallic FeNi, but contains a few Ni-bearing magnetite. No large CAIs were observed in this sample.

Geochemistry: Olivine (Fa31.5-35.0, Fe/Mn 90-125), Augite (Fs9.1-16.8Wo44.4-49.9), pigeonite (Fs25.8Wo4.6), Plagioclase (Ab60.1-70.5Or1.4-3)

Classification: CK4. This sample is classified as type 4 because the compositional range of olivine is slightly more heterogeneous (PMD of Fa content of olivine is about 5.8%) than those in type 5.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Beijing China
Date:P Dec. 2015
Mass (g):60
Pieces:1
Class:CK4
Shock stage:medium
Weathering grade:low
Fayalite (mol%):32.5±1.18 (n=8)
Ferrosilite (mol%):25.8, 14.0±2.3 (n=8)
Wollastonite (mol%):4.6, 48.9±1.8 (n=8)
Classifier:Wu Y.
Type spec mass (g):19 g
Type spec location:PMO
Main mass:Ke Zuokai
Comments:Submitted by Hsu W.
Institutions
   and collections
PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1402 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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