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Northwest Africa 8004
Basic information Name: Northwest Africa 8004
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8004
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 12.4 g
Meteoritical Bulletin:  MB 102  (2013)  CR2
Recommended:  CR2    [explanation]

This is 1 of 183 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 29 Sep 2013
Writeup from MB 102:

Northwest Africa 8004 (NWA 8004)

(Northwest Africa)

Purchased: 2013 April

Classification: Carbonaceous chondrite (CR2)

History: Purchased by B. Li in Tucson in April 2013.

Physical characteristics: Meteorite fragment, surface party covered by fusion crust, saw cut face shows many chondrules, CAIs, black inclusions, and metal specks, set in a dark-colored matrix. Magnetic susceptibility log χ = 4.92.

Petrography: (R. Bartoschewitz, Bart, and B. Li, Beijing) Microprobe examination of a polished thin section shows dominantly porphyritic and rare radial chondrules up to 0.3 mm (av. 0.1 mm), some rims decorated with metal/sulfide blebs. Abundant, fine-grained matrix with metal grains up to 0.2 mm.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine: Fa0.4-41.4, mean Fa13.4±15.1; Cr2O3=0.38±0.16, CaO=0.29±0.13 wt% (n=22); enstatite: Fs0.9-8.1Wo0.5-2.1, mean Fs4.1±2.7Wo1.1±0.5 (n=8); Kamacite: Ni=2.2-7.8, Co=0.27-0.41 (wt.%); troilite, pentlandite (Ni=23.9, Co=1.0 wt.%)

Classification: Carbonaceous chondrite (CR2).

Specimens: 3.5 g on deposit at Kiel, B. Li holds the main mass and 1.7 g with Bart.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2013 April
Mass (g):12.4
Fayalite (mol%):13.4 (0.4-41.2, n=22)
Ferrosilite (mol%):4.1 (0.9-8.1, n=8)
Wollastonite (mol%):1.1 (0.5-2.1)
Magnetic suscept.:4.92
Classifier:Bart, B. Li
Type spec mass (g):3.5
Type spec location:Kiel
Main mass:B. Li, Beijing
Comments:Submitted by R. Bartoschewitz
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
Beijing: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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