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Northwest Africa 12335
Basic information Name: Northwest Africa 12335
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12335
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 3.97 kg
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 180 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 6 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12335 (NWA 12335)

(Northwest Africa)

Purchased: 2018

Classification: Martian meteorite (Shergottite)

History: Purchased in July 2018 in Guelmim, Morocco.

Physical characteristics: Six identically appearing pieces with the following weights: 2290 g, 1486 g, 170 g, 20.7 g, and 2 smaller fragments of 4 g. No fusion crust. Broken surface reveals a mix of brown pyroxene grains and black maskelynite domains and shock melt.

Petrography: (C. Agee, UNM) The two major phases in this meteorite are clinopyroxene and maskelynite. The pyroxene compositions range from pigeonite to sub-calcic augite to ferro-pigeonite with a modal abundance of approximately 60%, and significant core to rim zoning in backscatter electron images. Maskelynite has modal abundance of approximately 35%.

Geochemistry: (C. Agee, UNM) Pigeonite Fs48.0±10.7Wo16.8±6.0, Fe/Mn=35±3, n=8; sub-calcic augite Fs29.4±3.9Wo34.7±2.1, Fe/Mn=32±2, n=4; ferro-pigeonite Fs81.8±1.9Wo13.7±1.4, Fe/Mn=36±3, n=8: maskelynite An48.2±6.0Ab49.6±4.5Or2.2±1.7, n=10; alkali feldspar An3.8Ab24.1Or72.1, n=1.

Classification: Evolved Martian basalt, pyroxene trends are similar to QUE 94201.

Specimens: 20.7 g including a probe mount on deposit at UNM, Ali Fettouh holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):3970.7
Pieces:6
Class:Martian (shergottite)
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):48.0±10.7, 29.4±3.9, 81.8±1.9
Wollastonite (mol%):16.8±6.0, 34.7±2.1, 13.7±1.4
Classifier:C. Agee, UNM
Type spec mass (g):20.7
Type spec location:UNM
Main mass:Ali Fettouh
Comments:Field name Z-2; 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. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6559 approved meteorites from (Northwest Africa) (plus 2021 unapproved names)

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