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Northwest Africa 7256
Basic information Name: Northwest Africa 7256
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7256
Observed fall: No
Year found: 2004
Country: Morocco
Mass:help 4.93 kg
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  CV3
Recommended:  CV3    [explanation]

This is 1 of 537 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 17 May 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 7256 (NWA 7256)

Morocco

Purchased: 2004

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Blaine Reed, Erfoud, Morocco, 2004.

Physical characteristics: Many fragments, saw cut reveals numerous chondrules up to 5 mm set in dark brown matrix, parallel fractures.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a variety of chondrules PO, POP, and a few CAIs, fine-grained matrix, weathering veins.

Geochemistry: (C. Agee and N. Wilson, UNM) Type I chondrules: olivine Fa1.9±1.4, Cr2O3=0.26±0.13 wt%, n=24; low-Ca pyroxene Fs2.6±2.2Wo1.5±1.2, Fe/Mn=14±7, n=18, Type II chondrules: Fa41.2±13.9, Fe/Mn=122±19, n=27.

Classification: Carbonaceous chondrite (CV3), weathering grade W3.

Specimens: 25.5 g including a probe mount on deposit at UNM, Reed holds the main mass.

Data from:
  MB100
  Table 1
  Line 1699:
Place of purchase:Erfoud, Morocco
Date:P 2004
Mass (g):4932
Pieces:Many fragments
Class:CV3
Weathering grade:W3
Fayalite (mol%):1.9±1.4, 41.2±13.9
Ferrosilite (mol%):2.6±2.2
Wollastonite (mol%):1.5±1.2
Classifier:C. Agee
Type spec mass (g):25.5
Type spec location:UNM
Main mass:Reed
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)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1502 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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