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Northwest Africa 8653
Basic information Name: Northwest Africa 8653
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8653
Observed fall: No
Year found: 2014
Country: Mauritania
Mass:help 214 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 200 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 11 Dec 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8653 (NWA 8653)

Mauritania

Purchased: Sept 2014

Classification: Martian meteorite (Shergottite)

Physical characteristics: Three pieces of partly fusion-crusted stones were found. Minimal weathering.

Petrography: Microprobe examination of a polished section shows 60% pyroxene, 35% maskelynite, minor merrillite, trace chlorapatite and pyrrhotite. Pyroxenes show core-to-rim zonation. Grain size of mm.

Geochemistry: Two distinct pyroxene compositional trends. Pigeonite, Fs59.7±1.4 Wo18.3±3.6 (Fs57.7-62Wo14.7-22.9, Fe/Mn=37±1, N=7); augite, Fs29.7±10.5Wo32.7±2.1 (Fs21-51Wo27-35, Fe/Mn=30±4, N=11); maskelynite, An48.0±5.1Ab49.9±4.6Or2.1±0.8 (An38.2-51.9Ab46.1-59.9Or1.1-4.1, N=11).

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Changsha China
Date:P Sept 2014
Mass (g):214
Pieces:3
Class:Martian (shergottite)
Weathering grade:moderate
Ferrosilite (mol%):59.7±1.4; 29.7±10.5
Wollastonite (mol%):18.3±3.6; 32.7±2.1
Classifier:Wu Y., PMO
Type spec mass (g):20
Type spec location:PMO
Main mass:Ke Zuokai
Comments:Submitted by Hsu W.
Institutions
   and collections
PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 103 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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