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Northwest Africa 7659
Basic information Name: Northwest Africa 7659
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7659
Observed fall: No
Year found: 2011
Country: Morocco
Mass:help 296 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  H4
Recommended:  H4    [explanation]

This is 1 of 5948 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 28 Jan 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7659 (NWA 7659)

Morocco

Purchased: 2011

Classification: Ordinary chondrite (H4)

History: Purchased by David Robinson from Sean Tutorow in December 2011.

Physical characteristics: Single stone, weathered rough exterior, saw cut reveals many small chondrules and metal set in a dark gray groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows many distinct BO, PO, and POP chondrules, some with mesostasis. Troilite and taenite present, ~50% of metal is oxidized, numerous weathering veins.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa21.2±0.5, Fe/Mn=42±2, n=10; low-Ca pyroxene Fs12.5±4.5Wo0.6±0.3, Fe/Mn=22±5, n=10.

Classification: Ordinary chondrite (H4), weathering grade W3.

Specimens: 21.9 g including a probe mount on deposit at UNM, Sean Tutorow holds 50 g, David Robinson holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Date:P 2011
Mass (g):295.7
Pieces:1
Class:H4
Weathering grade:W3
Fayalite (mol%):21.2±0.5
Ferrosilite (mol%):12.5±4.5
Wollastonite (mol%):0.6±0.3
Classifier:C. Agee, UNM
Type spec mass (g):21.9
Type spec location:UNM
Main mass:David Robinson
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 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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