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Northwest Africa 10016
Basic information Name: Northwest Africa 10016
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10016
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 11 g
Meteoritical Bulletin:  MB 104  (2015)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 322 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 26 Feb 2015
Writeup from MB 104:

Northwest Africa 10016 (NWA 10016)

(Northwest Africa)

Purchased: 2014

Classification: Martian meteorite (Shergottite)

History: Purchased by Steve Witt from a meteorite dealer in Morocco in 2014.

Physical characteristics: Three identical appearing pieces, with dark green exterior and patches of weathered black fusion crust. A saw-cut reveals a green-gray interior, black shock melt veins, and some small (<1 mm) vesicles.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows ~60% pyroxene, ~30% maskelynite. Pyroxenes show core-to-rim zonation in BSE images. Pyroxene grain size ranges from 200 μm to >1 mm. Maskelynite domains range from 50 μm to >1 mm. Shock melt veins with vesicles up to 300 μm observed. Accessory Ti-magnetite, iron-sulfide, ilmenite, silica throughout.

Geochemistry: (C. Agee and N. Muttik, UNM). There are two distinct pyroxene compositional trends present. Pigeonite trend from Fs32.1Wo13.5 to Fs65.1Wo15.9, average: Fs52.6±12.0Wo16.5±2.5, Fe/Mn=37±3, n=12; augite trend from Fs21.4Wo34.9 to Fs38.0Wo29.3, average: Fs25.7±5.5Wo32.3±1.8, Fe/Mn=30±3, n=10; maskelynite Or1.6±0.3Ab46.5±2.6An51.9±2.8, n=6; shock melt (proxy for bulk composition) SiO2=49.9±0.5, Al2O3=8.4±4.1, TiO2=0.63±0.12, Cr2O3=0.12±0.03, MgO=7.3±3.1, FeO=20.0±2.8, MnO=0.52±0.10, CaO=10.5Na2O=1.3±0.6, K2O=0.17±0.07, CaO/Al2O3=1.2 (wt%), Fe/Mn=39±3, Mg#=38.3±5.9, n=6.

Classification: Martian (pyroxene-phyric shergottite), aluminum-depleted basalt, Shergotty-like pyroxene compositional trends.

Specimens: 2.23 g including a probe mount on deposit at UNM, Steve Witt and Mendy Ouzillou hold the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2014
Mass (g):11
Class:Martian (shergottite)
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):52.6±12.0, 25.7±5.5
Wollastonite (mol%):16.5±2.5, 32.3±1.8
Classifier:C. Agee, UNM
Type spec mass (g):2.23
Type spec location:UNM
Main mass:Steve Witt and Mendy Ouzillou
Comments:Submitted by C. Agee
   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)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 9743 approved meteorites from (Northwest Africa) (plus 1857 unapproved names)

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