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Northwest Africa 7656
Basic information Name: Northwest Africa 7656
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7656
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 2.23 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L3.3
Recommended:  L3.3    [explanation]

This is 1 of 18 approved meteorites classified as L3.3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 5 Feb 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7656 (NWA 7656)

Morocco

Purchased: Aug 2012

Classification: Ordinary chondrite (L3.3)

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

Physical characteristics: Single stone with dark weathered surface and chondrules visible through desert patina. Saw cut reveals slight brecciation and directional fabric, many densely packed chondrules of variable size in a dark matrix, abundant fine-grained metal/sulfides.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, many 200-500 μm, range ~100-2000 μm, ubiquitous kamacite, taenite, and troilite; minor high-Ca pyroxene.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa15.5±9.5, range Fa2.1-37.6, Fe/Mn=48±20, Cr2O3=0.08±0.05 wt%, CaO=0.09±0.06 wt%, n=28; low-Ca pyroxene Fs4.2±2.9Wo0.8±1.3, range Fs0.6-13.4, Fe/Mn=17±15, n=26.

Classification: Ordinary chondrite (L3.3), weathering grade W2.

Specimens: 21.4 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 Aug 2012
Mass (g):2230
Pieces:1
Class:L3.3
Weathering grade:W2
Fayalite (mol%):15.5±9.5
Ferrosilite (mol%):4.2±2.9
Wollastonite (mol%):0.8±1.3
Classifier:C. Agee, UNM
Type spec mass (g):21.4
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:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1405 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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