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Northwest Africa 8684
Basic information Name: Northwest Africa 8684
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8684
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 1500 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  L6
Recommended:  L6    [explanation]

This is 1 of 10924 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 15 Dec 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8684 (NWA 8684)

(Northwest Africa)

Purchased: 2014

Classification: Ordinary chondrite (L6)

History: Purchased by Aziz Habibi in Morocco, 2014.

Physical characteristics: Single stone with brown-gray sandblasted exterior. A saw cut reveals numerous chondrules, some up to 3 mm, scattered metal/sulfide grains, all set in a dark-gray groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished epoxy mount shows equilibrated chondrules, also poikilitic textures, tiny metal/sulfide blebs throughout, also a few scattered larger metal/sulfide domains up to 500 μm, plagioclase grains up to ~200 μm.

Geochemistry: (C. Agee and N. Muttik, UNM) EMPA. Olivine Fa22.9±0.5, Fe/Mn=46±3, n=5; low-Ca pyroxene Fs18.9±1.4Wo4.0?1.2, Fe/Mn=29±5, n=8; Oxygen Isotopes, laser fluorination (K. Ziegler, UNM), analyses on 3 acid-washed aliquots, 1.2, 1.7, 1.9 mg, gave values δ17O=3.964, 3.943, 3.738, δ18O=5.310, 5.243, 4.907, Δ17O=1.160, 1.175, 1.147 (linearized, all permil).

Classification: Ordinary chondrite (L6). This meteorite has olivine and pyroxene compositions consistent with L6, however oxygen isotopes are consistent with LL (S3, W1).

Specimens: 42 g including microprobe mount on deposit UNM, Aziz Habibi holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2014
Mass (g):1500
Pieces:1
Class:L6
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):22.9±0.5
Ferrosilite (mol%):18.9±1.4
Wollastonite (mol%):4.0±1.2
Classifier:C. Agee, UNM
Type spec mass (g):42
Type spec location:UNM
Main mass:Aziz Habibi
Comments:Submitted by C. Agee
Plots: O isotopes:  
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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2061 unapproved names)

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