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Northwest Africa 7810
Basic information Name: Northwest Africa 7810
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7810
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 213 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  CV3
Recommended:  CV3    [explanation]

This is 1 of 536 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 27 May 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 7810 (NWA 7810)

(Northwest Africa)

Purchased: Feb 2013

Classification: Carbonaceous chondrite (CV3)

Physical characteristics: Many weathering veins were observed throughout the stone; metal is nearly absent and has been replaced almost entirely by oxides. A few opaque-rich chondrules contain terrestrial oxides. Fine sulfide grains are present in the matrix and in a few chondrules. Weathering is equivalent to W4; the stone is moderately to heavily weathered. Fusion crust is patchy, but present on all sides.

Petrography: (A.E. Rubin, UCLA) A fine-grained, fluffy type-A CAI measuring 800 × 910 µm was observed in the thin section. It contains 10-30 μm spinels. One particularly large amoeboid olivine inclusion present in thin section (5 × 3 mm), large for CV3. Several others 0.8 to 2 mm are present. Most chondrules are type I with igneous rims, average diameter ~750 μm. Heterogeneity of olivine and polysythetically twinned low-Ca clinopyroxene are indicative of an unequilibrated chondrite.

Data from:
  MB104
  Table 0
  Line 0:
Date:P Feb 2013
Mass (g):213
Pieces:1
Class:CV3
Shock stage:S1
Weathering grade:high
Fayalite (mol%):4.0±1.9 (1.1-6.7, n=7)
Ferrosilite (mol%):2.0±1.0 (n=7)
Wollastonite (mol%):2.2±0.2 (n=7)
Classifier:A.E. Rubin, UCLA
Type spec mass (g):30
Type spec location:UCLA
Main mass:Utas
Finder:anonymous
Comments:[U8/NWAU313]. Purchased from Said Haddany in Tucson.; submitted by J. Utas
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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