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Northwest Africa 7518
Basic information Name: Northwest Africa 7518
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7518
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 650 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  LL4
Recommended:  LL4    [explanation]

This is 1 of 361 approved meteorites classified as LL4.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 31 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7518 (NWA 7518)

Morocco

Purchased: May 2012

Classification: Ordinary chondrite (LL4)

History: Purchased by Sean Tutorow in Morocco, May 2012.

Physical characteristics: Single stone, brown exterior, saw cut reveals numerous chondrules and clasts and scattered fine-grained metal/sulfide, set in a light brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous PO and POP chondrules in a fine-grained crystallized matrix, some chondrules with recrystallized mesostasis and some with plagioclase. Also present, some finer-grained domains up to 5 mm with a few relict chondrules, possibly LL6 lithology. Accessory troilite, kamacite, taenite, and chromite.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa29.3±0.5, Fe/Mn=60±3, n=14; low-Ca pyroxene Fs22.4±3.1Wo1.5±1.1 Fe/Mn=36±3, n=22.

Classification: Ordinary chondrite (LL4), weathering grade W2.

Specimens: 20.8 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P May 2012
Mass (g):650.14
Pieces:1
Class:LL4
Weathering grade:W2
Fayalite (mol%):29.3±0.5
Ferrosilite (mol%):22.4±3.1
Wollastonite (mol%):1.5±1.1
Classifier:C. Agee, UNM
Type spec mass (g):20.8
Type spec location:UNM
Main mass:Sean Tutorow
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. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1402 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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