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Northwest Africa 7384
Basic information Name: Northwest Africa 7384
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7384
Observed fall: No
Year found: 2010
Country: Morocco
Mass:help 125 g
Meteoritical Bulletin:  MB 101  (2012)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 91 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 12 Sep 2012
Writeup from MB 101:

Northwest Africa 7384 (NWA 7384)


Purchased: Jan 2010

Classification: Primitive achondrite (Acapulcoite)

History: Purchased by Michael Farmer from a Moroccan meteorite dealer in Tucson, January 2010.

Physical characteristics: Single stone, dark fusion crust, moderately weathered exterior, saw cut reveals many small metal grains set in a dark-brown, fine-grained groundmass, some oxide staining.

Petrography: (C. Agee, UNM) Microprobe examination of a polished epoxy mount shows approximately 15% olivine, 30% orthopyroxene, 30% diopside, and 10% plagioclase. Silicate grains 50-200 μm, polygonal texture with 120° triple-junction grain boundaries. Metal oxide vein permeate the stone occupying many grain boundaries. Numerous taenite grains up 400 μm; scattered, small kamacite blebs as inclusions in pyroxene; troilite also detected.

Geochemistry: C. Agee and M. Spilde, UNM) EMPA. Olivine Fa10.6±0.1, Fe/Mn=23±1, N=12; orthopyroxene Fs10.2±0.1Wo1.7±0.3, Fe/Mn=14±1 N=8; diopside Fs4.5±0.4Wo43.1±1.5, Fe/Mn=9±1, Cr2O3=1.36±0.14 wt%, N=18; plagioclase Or4.4±0.6Ab81.2±0.7An14.4±0.4, n=20.

Classification: Achondrite (Acapulcoite), distinguished from lodranite type by the relatively high modal abundance of plagioclase and the relatively small silicate grain size.

Specimens: 22.12 g including a probe mount on deposit at UNM; MFarmer holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P Jan 2010
Mass (g):125
Fayalite (mol%):10.6±0.1
Ferrosilite (mol%):10.2±0.1, 4.5±0.4
Wollastonite (mol%):1.7±0.3, 43.1±1.5
Classifier:C. Agee, UNM
Type spec mass (g):22.12
Type spec location:UNM
Main mass:MFarmer
Comments:Submitted by C. Agee
   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)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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     This is 1 of 2003 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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