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Northwest Africa 6148
Basic information Name: Northwest Africa 6148
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6148
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 270 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2014)  Martian (nakhlite)
Recommended:  Martian (nakhlite)    [explanation]

This is 1 of 19 approved meteorites classified as Martian (nakhlite).   [show all]
Search for other: Martian meteorites
Comments: Approved 9 Mar 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 6148 (NWA 6148)

(Northwest Africa)

Purchased: 2009

Classification: Martian meteorite (Nakhlite)

History: Two stones that fit together (total 270 g) were purchased in Erfoud, Morocco, in 2009 by A. Aaronson.

Physical characteristics: Desert wind-ablated with little fusion crust, very friable.

Petrography: (T. Bunch and J. Wittke, NAU): Millimeter-sized euhedral augite and olivine (relative proportions, 85:15) set in a glassy mesostasis of dendritic pyroxenes, acicular Ti-magnetite, and small grains of silica, feldspar, and merrillite. Olivine and augite are strongly zoned. Weathering and shock are both low.

Geochemistry: Augite: cores, Fs23.2Wo42 (Fe/Mn=34); rims to Fa41.5Wo38. Olivine: cores, Fa64.5 (a few cores are more magnesian at Fa58) (Fe/Mn=45); rims to Fa74.5; mesostasis feldspar, An12.3-16.7Or5-12.

Classification: Martian (nakhlite). Possibly paired with NWA 5790.

Specimens: 20.1 g and one polished thin section are on deposit at UWB. The remaining material is held by Mr. P. Mani.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2009
Mass (g):270
Pieces:2
Class:Martian (nakhlite)
Shock stage:low
Weathering grade:low
Fayalite (mol%):58.0-74.5
Ferrosilite (mol%):23.2-41.5
Wollastonite (mol%):38-42
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):20.2
Type spec location:UWB
Main mass:P. Mani
Comments:Submitted by T. Bunch
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 5735 approved meteorites from (Northwest Africa) (plus 2073 unapproved names)

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