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Northwest Africa 2682
Basic information Name: Northwest Africa 2682
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2682
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 636 g
Classification
  history:
Recommended:  L3-6    [explanation]

This is 1 of 59 approved meteorites classified as L3-6.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 2 Aug 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 2682 (NWA 2682)

(Northwest Africa)

Purchased: 2004

Classification: Ordinary chondrite (L3-6)

History: Purchased by Nelson Oakes in 2004 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS; T. Bunch and J. Wittke, NAU; P. Carpenter, WUSL) Closely-packed, well-formed chondrules (apparent diameter 820±300 µm, N = 20) plus some angular clasts (Type 6, equilibrated with rare remnant chondrules) are set in a finer grained matrix containing stained metal.

Geochemistry: Olivine (Fa27.9±9.3, range Fa8.7-36.9, N = 8; Cr2O3 in ferroan examples 0.05-0.69 wt.%, mean 0.21±0.25 wt.%, N = 7), orthopyroxene (Fs10.1±10.3Wo0.7±0.5, range Fs3.4-21.9Wo0.4-1.2, N = 3), clinopyroxene (Fs10.7Wo37.5; Fs7.9Wo46.3; N = 2), olivine in Type 6 lithic clast (Fa26.1±0.1, range Fa26.0-26.2, N = 2).

Classification: Ordinary chondrite (L3-6). Affinity to L chondrites is established from olivine composition in equilibrated lithic clasts.

Specimens: 47.4 g including one polished thin section at PSF; remainder with Mr. N. Oakes.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2004
Mass (g):636
Pieces:1
Class:L3-6
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):27.9±9.3
Ferrosilite (mol%):10.1±10.3
Wollastonite (mol%):0.7±0.5
Classifier:A. Irving and S. Kuehner, UWS; T. Bunch & J. Wittke; P. Carpenter
Type spec mass (g):47.4
Type spec location:PSF
Main mass:N. Oakes
Comments:Submitted by A. Irving
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
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)
Oakes: Nelson Oakes, Route 1, House 50C, Uniondale, PA 18470, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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