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Northwest Africa 12192
Basic information Name: Northwest Africa 12192
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12192
Observed fall: No
Year found: 2018
Country: Algeria
Mass:help 42.7 g
Meteoritical Bulletin:  MB 107  (2018)  CK5
Recommended:  CK5    [explanation]

This is 1 of 201 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 9 Nov 2018
Writeup from MB 107:

Northwest Africa 12192 (NWA 12192)


Purchased: May 2018

Classification: Carbonaceous chondrite (CK5)

History: Found north of Tindouf, Algeria, January 2018. Purchased by Darryl Pitt in Mauritania, May 2018.

Physical characteristics: Single stone with irregular weathered surface, saw cut reveals distinct chondrules up to 1mm in diameter set in a dark-gray groundmass.

Petrography: (C. Agee, UNM) Microprobe examination shows scattered, distinct, texturally equilibrated chondrules set in a fine-grained matrix. Plagioclase grain size up to 50 μm in diameter. Abundant chromium-rich magnetite observed throughout, some up to 300 μm in diameter.

Geochemistry: (C. Agee, UNM) Olivine Fa29.9±1.0, Fe/Mn=104±8, NiO=0.30±.03 (wt%), n=13; low-Ca pyroxene Fs25.4±1.0Wo0.7±0.0, Fe/Mn=66±6, n=6; plagioclase Ab69.2±3.3An22.1±6.9Or8.7±8.8, n=5.

Classification: Carbonaceous chondrite (CK5) CK chondrite based Fe/Mn of olivine and pyroxenes, and on the presence of chromium-rich magnetite. Petrologic type 5 based on the equilibrated state of olivine and pyroxene, distinct chondrules, and secondary plagioclase size.

Specimens: 9 g on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P May 2018
Mass (g):42.7
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):29.9±1.0
Ferrosilite (mol%):25.4±1.0
Wollastonite (mol%):0.7±0.0
Classifier:C. Agee, UNM
Type spec mass (g):9
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MVCH-353; submitted by C. Agee, UNM
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 1270 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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