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Northwest Africa 12772
Basic information Name: Northwest Africa 12772
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12772
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 198.8 g
Classification
  history:
Recommended:  CV3    [explanation]

This is 1 of 503 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 3 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12772 (NWA 12772)

(Northwest Africa)

Purchased: 2015 Sep

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Michael Farmer from a meteorite dealer at the Denver Gem and Mineral Show, September 2015.

Physical characteristics: Whole stone mostly covered with black fusion crust.

Petrography: Dominated by abundant large (0.1 to 4 mm, mean 0.8 mm; N=165 chondrules; 54.8 vol.%) FeO-poor and FeO-rich chondrules (FeO-poor chondrules are dominant) with unequilibrated silicates (Fa0.4-43.5) set in an FeO-rich fine-grained matrix (40.9 vol.%). Chondrule types include C, POP, PO, and BO. The meteorite contains abundant CAIs (4.3 vol.%), and contains a large type B CAI (3.5±1.6 mm in apparent dimensions). Similar to the reduced CV3 chondrite RBT 04133 (Davidson et al., 2014), Ni is not positively correlated with Co (e.g., Ni-poor Fe,Ni metal with 4.84 wt.% Ni and 1.93 wt.% Co, and Ni-rich Fe,Ni metal with 46.49 wt.% Ni and 0.65 wt.% Co).

Geochemistry: Olivine: overall Fa11.4±15.5, Fa0.4-43.5; N=25; FeO-poor chondrules (Fa0.7±0.3, Fa0.4-1.1; N=15); FeO-rich chondrules (Fa27.4±12.8, Fa3.2-43.5; N=10).

Classification: Carbonaceous chondrite (CV3)

Specimens: 198.75 g at ASU.

Bibliography:
  • Davidson J, Schrader D.L., Alexander C.M.O'D., Lauretta D., Busemann H, Franchi I., Greenwood R.C., Connolly H.C., Domanik K.J., and Verchovsky A. (2014) Petrography, stable isotope compositions, microRaman spectroscopy, and presolar components of Roberts Massif 04133: A reduced CV3 carbonaceous chondrite. Meteorit. Planet. Sci. 49 2133-2151 (link)
Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Denver, Colorado
Date:P 2015 Sep
Mass (g):198.75
Pieces:1
Class:CV3
Weathering grade:moderate
Fayalite (mol%):11.4±15.5 (N=25)
Classifier:D.L. Schrader, ASU
Type spec mass (g):198.75
Type spec location:ASU
Main mass:ASU
Comments:Submitted by Devin L. Schrader
Institutions
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
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 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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