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Northwest Africa 2210
Basic information Name: Northwest Africa 2210
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2210
Observed fall: No
Year found: 2000
Country: Morocco
Mass:help 74 g
Meteoritical Bulletin:  MB 90  (2006)  CH3
Recommended:  CH3    [explanation]

This is 1 of 28 approved meteorites classified as CH3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CH chondrites, CH-CB family, and Metal-rich meteorites
Comments: Approved 3 Feb 2006
Writeup from MB 90:

Northwest Africa 2210


Find: December 2004

Carbonaceous chondrite (CH3)

History: DGregory purchased a black, magnetic stone weighing 74 g in December 2004 from D. Bessey, who had obtained this material from a Moroccan dealer in Erfoud.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fine grained (10–89 µm) with glass spheres (En99Fo99) and chondrules (size range 10–80 µm), together with broken fragments of the same, in a sparse matrix.

Geochemistry: Abundant metal (15–20% by volume) which is mainly kamacite (5–10 wt% Ni), but in places taenite (Ni = ~20 wt%). Most of the chondrules contain very magnesian olivine (Fa1) and/or orthopyroxene (Fs1) in a mesostasis of glass, but some chondrules and fragments have more ferroan silicates (up to Fa50 and Fs50). Some cryptocrystalline chondrule fragments are composed of very fine intergrowths of low-Ca and high-Ca pyroxene and glass spheres have compositions intermediate between forsterite and enstatite. Other phases identified include Cr-Al-rich diopside, troilite, feldspathic glass, and rare, Al-rich chromite. No CAIs were observed. Oxygen isotopes: (D. Rumble, CIW) Analyses of two whole rock fragments by laser fluorination gave, respectively, δ18O = 3.95, 4.11; δ17O = 1.07, 1.05; ∆17O = −1.02, −1.12 (all ‰).

Classification: Carbonaceous chondrite (CH3).

Specimens: A 14.8 g type specimen and one polished thin section are on deposit at UWS. DGregory holds the main mass.

Data from:
  Table 2
  Line 16:
Place of purchase:Erfoud, Morocco
Date:Dec 2004
Mass (g):74
Type spec mass (g):14.8
Plots: O isotopes:  
   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)
Bessey: Dean Bessey ,P.O. Box 40810, Glenfield, Auckland 1310 , New Zealand; Website (private address)
CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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     This is 1 of 2118 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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