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Northwest Africa 7138
Basic information Name: Northwest Africa 7138
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7138
Observed fall: No
Year found: 2010
Country: Morocco
Mass:help 19 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  CM2
Recommended:  CM2    [explanation]

This is 1 of 625 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 17 May 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 7138 (NWA 7138)

Morocco

Found: 2010

Classification: Carbonaceous chondrite (CM2)

Petrography: Wide range of chondrule sizes up to 4 mm. Abundant (AOAs), matrix altered to physillocates.

Geochemistry: Olivine Fa1.5-66.7, Fe/Mn=134, Cr2O3 = 0.22-0.42 wt.%; AOA olivine Fa1.5; plagioclase An87; diopside Fs2.1Wo50; metal Ni = 2.2 wt.%.

Classification: Carbonaceous chondrite (CM2)

Data from:
  MB100
  Table 1
  Line 1653:
Place of purchase:Erfoud
Date:2010
Mass (g):19.01
Pieces:1
Class:CM2
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):1.5 - 66.7
Ferrosilite (mol%):2.1-22.3
Wollastonite (mol%):1.2-2.3
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):4.15
Type spec location:PSF
Main mass:F. Kuntz
Comments:Submitted by Wittke
Institutions
   and collections		 NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
Kuntz: Fabien Kuntz, France; 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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mirko Graul            
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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