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Northwest Africa 7681
Basic information Name: Northwest Africa 7681
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7681
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 846 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3182 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Feb 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7681 (NWA 7681)

Morocco

Purchased: 2012

Classification: Ordinary chondrite (LL5)

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

Physical characteristics: Single stone, light-brown weathered exterior, saw-cut reveals scattered chondrules set in a light- brown matrix, sparse fine-grained metal/sulfide.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows chondrules of variable size, accessory troilite, plagioclase, and scattered oxidized iron metal.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa27.4±0.4, Fe/Mn=59±3, n=31; low-Ca pyroxene Fs21.8±2.9Wo1.3±0.6, Fe/Mn=33±3, n=28.

Classification: Ordinary chondrite (LL5) weathering grade W3.

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):846
Pieces:1
Class:LL5
Weathering grade:W3
Fayalite (mol%):27.4±0.4
Ferrosilite (mol%):21.8±2.9
Wollastonite (mol%):1.3±0.6
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 1871 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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