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Northwest Africa 7683
Basic information Name: Northwest Africa 7683
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7683
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 609 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L3.6
Recommended:  L3.6    [explanation]

This is 1 of 57 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 26 Feb 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7683 (NWA 7683)

Morocco

Purchased: 2012

Classification: Ordinary chondrite (L3.6)

History: Purchased by Adam Bates from a meteorite dealer in Morocco, August 2012.

Physical characteristics: Single stone, dark brown weathered exterior, saw-cut reveals many densely packed chondrules of variable size, one up to 7 mm, fine-grained metal/sulfide.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, most in the range ~200-1500 μm, ubiquitous troilite, kamacite, taenite, and Fe-oxide.

Geochemistry: (C. Agee and L. Burkemper, UNM) Olivine Fa23.1±6.7, Fe/Mn=59±18, Cr2O3=0.05±0.04 wt%, n=34; low-Ca pyroxene Fs15.1±8.8Wo1.8±2.6, Fe/Mn=38±35, n=32.

Classification: Ordinary chondrite (L3.6), mean Fa-content and sigma consistent with type 3.6, low-Ca pyroxene has anomalously high sigma for type 3.6, weathering grade W2.

Specimens: 25 g including a probe mount on deposit at UNM, Adam Bates holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2012
Mass (g):609
Pieces:1
Class:L3.6
Weathering grade:W2
Fayalite (mol%):23.1±6.7
Ferrosilite (mol%):15.1±8.8
Wollastonite (mol%):1.8±2.6
Classifier:C. Agee, UNM
Type spec mass (g):25
Type spec location:UNM
Main mass:Adam Bates
Comments:Submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1374 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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