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Northwest Africa 7917
Basic information Name: Northwest Africa 7917
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7917
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 150.1 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  H3.4
Recommended:  H3.4    [explanation]

This is 1 of 17 approved meteorites classified as H3.4.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 31 Jul 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7917 (NWA 7917)

Morocco

Purchased: 2012

Classification: Ordinary chondrite (H3.4)

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

Physical characteristics: Single stone, dark irregular exterior, saw-cut reveals many densely packed chondrules of variable size, abundant fine-grained metal/sulfides.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous POP chondrules, metal is <25% oxidized.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine range Fa0.9-27.3, n=38, mean value ferroan olivine Fa19.2±7.9, Fe/Mn=49±13, Cr2O3=0.13±0.16 wt%, range Cr2O3=0.01-0.50 wt%, n=37; low-Ca pyroxene range Fs2.5-21.8, mean value Fs12.4±7.2Wo0.8±0.8, Fe/Mn=24±10, n=29.

Classification: Ordinary chondrite (H3.4), type 3.4 based on ferroan olivine mean Fs and sigma, weathering grade W2.

Specimens: 21 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2012
Mass (g):150.11
Pieces:1
Class:H3.4
Weathering grade:W2
Fayalite (mol%):19.2±7.9
Ferrosilite (mol%):12.4±7.2
Wollastonite (mol%):0.8±0.8
Classifier:C. Agee, UNM
Type spec mass (g):21
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G-267; 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:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater)

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