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Northwest Africa 12948
Basic information Name: Northwest Africa 12948
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12948
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 409 g
Classification
  history:
Recommended:  CV3    [explanation]

This is 1 of 510 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 7 Nov 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12948 (NWA 12948)

(Northwest Africa)

Purchased: 2019 Feb

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Darryl Pitt in February 2019 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed granular and PO chondrules (apparent diameter 1100±460 µm, N = 23) plus irregularly-shaped, very fine grained CAI are set in a fine grained matrix (~30 vol.%, orange-brown in thin section).

Geochemistry: Olivine in chondrules (Fa11.0±12.4 (range Fa0.4-41.9, N = 11), olivine in matrix (Fa60.9±1.8, N = 2), low-Ca pyroxene (Fs0.8±0.1Wo4.4±4.2 (range Fs0.7-0.9Wo1.0-9.9, N = 4), Al-Ti diopside (Fs1.6Wo46.4, Al2O3 = 5.5 wt.%, TiO2 = 5.1 wt.%), plagioclase (An83.4-88.3Or0.1, N = 2).

Classification: Carbonaceous chondrite (CV3).

Specimens: 20.2 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2019 Feb
Mass (g):408.5
Pieces:1
Class:CV3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):11.0±12.4
Ferrosilite (mol%):0.8±0.1
Wollastonite (mol%):4.4±4.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.2
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 480; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private 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 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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