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Northwest Africa 7980
Basic information Name: Northwest Africa 7980
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7980
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 386 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L3.10
Recommended:  L3.10    [explanation]

This is 1 of 5 approved meteorites classified as L3.10.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 13 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7980 (NWA 7980)

Morocco

Purchased: 2013

Classification: Ordinary chondrite (L3.10)

History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to Sean Tutorow for classification, 2012.

Physical characteristics: Thirty two matching fragments, dark weathered fusion crust, broken surface reveals many densely packed orange-brown chondrules of variable size, set in darker matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, many are porphyritic, apparent mean diameter 545±288 μm, range measured 200-1300 μm, n=40. Abundant opaque matrix, most chondrules with glass or mesostasis.

Geochemistry: (C. Agee and N. Muttik, UNM) Ferroan olivine Fa20.0±7.2, Fe/Mn=48±15, Cr2O3=0.27±0.18 wt%, range Cr2O3=0.04-0.86 wt%, CaO=0.17±0.09 wt%, n=29; low-Ca pyroxene Fs12.0.±9.2Wo1.2±2.2, Fe/Mn=22±13, n=33.

Classification: Ordinary chondrite (L3.10), type 3.10 based on ferroan olivine mean Cr2O3 content and sigma from Grossman and Brearley (2005). Weathering grade W2.

Specimens: 20.7 g including a probe mount on deposit at UNM, Sean Tutorow 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:
Place of purchase:Morocco
Date:P 2013
Mass (g):386.2
Pieces:32
Class:L3.10
Weathering grade:W2
Fayalite (mol%):20.0±7.2
Ferrosilite (mol%):12.0.±9.2
Wollastonite (mol%):1.2±2.2
Classifier:C. Agee, UNM
Type spec mass (g):20.7
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G-415; 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:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1374 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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