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Northwest Africa 8007
Basic information Name: Northwest Africa 8007
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8007
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 664 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L3.2
Recommended:  L3.2    [explanation]

This is 1 of 17 approved meteorites classified as L3.2.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 14 Oct 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 8007 (NWA 8007)

Morocco

Purchased: 2013

Classification: Ordinary chondrite (L3.2)

History: Purchased from a dealer in Morocco in 2013 by Steve Witt and Mr. Smara Addi.

Physical characteristics: Three matching stones, dark brown weathered exterior, no fusion crust, sawn surface reveals densely packed chondrules of variable size.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, many are porphyritic, apparent mean diameter 523±308 μm, range 150-2000 μm, n=52. Abundant opaque matrix, most chondrules with glass or mesostasis. Aluminous augite, Fe,Ni-metal, sulfide present.

Geochemistry: (C. Agee and N. Muttik, UNM) Ferroan olivine Fa17.0±10.1, Fe/Mn=63±43, Cr2O3=0.14±0.17 wt%, range Cr2O3=0.01-0.58 wt%, CaO=0.11±0.08 wt%, n=32; low-Ca pyroxene Fs9.5±5.1Wo1.3±2.0, Fe/Mn=26±21, n=29.

Classification: Ordinary chondrite (L3.2), transitional between type 3.2 and 3.15 based on ferroan olivine mean Cr2O3 content and sigma from Grossman and Brearley (2005). Weathering grade W1.

Specimens: 25.7 g including a probe mount on deposit at UNM, Steve Witt holds the main mass.

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB102
  Table 0
  Line 0:
Date:P 2013
Mass (g):664
Pieces:3
Class:L3.2
Weathering grade:W1
Fayalite (mol%):17.0±10.1
Ferrosilite (mol%):9.5±5.1
Wollastonite (mol%):1.3±2.0
Classifier:C. Agee, UNM
Type spec mass (g):25.7
Type spec location:UNM
Main mass:Steve Witt
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:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Alessandro Takeda   
Michael S. Scherman   
Suzanne De Paula   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1386 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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