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Northwest Africa 10628
Basic information Name: Northwest Africa 10628
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10628
Observed fall: No
Year found: 2014
Country: Algeria
Mass:help 24.1 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 191 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 24 Apr 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10628 (NWA 10628)

Tindouf, Algeria

Find: 2014

Classification: Martian meteorite (Shergottite)

History: Four fragments were purchased from an anonymous Moroccan dealer in 2015 totaling 24.1 g.

Physical characteristics: The meteorites have a light-brownish appearance with minor patches of fusion crust on the surface.

Petrography: (A. Bischoff, IfP). The rock is coarse-grained and consists of mm-sized grains of pyroxene (intergrowth of low-Ca- and Ca-pyroxene; approximately 70 vol%) and interstitial plagioclase/maskelynite grains (~30 vol%, 0.3-1.0 mm). Plagioclase is mostly transformed to maskelynite, but many grains are still crystalline at least at their edges (in contact to pyroxene). Pyroxene is strongly fractured and has shock-induced mosaic extinction. Some glassy melt pockets are also presented. As accessory phases sulfide, Ti-magnetite, ilmenite, and chromite were observed.

Geochemistry: Mineral compositions and geochemistry: (M. Patzek, S. Ebert, IfP). Zoned low-Ca pyroxene is Fs32-68En17-56Wo11-23 (average: Fs56.8±7.7En26.8±9.2Wo16.4±3.3; n= 15; FeO/MnO = 39.5±3). Ca-pyroxene is Fs21.7±1.0En44.8±0.8Wo33.6±1.4, on average (n=14). Plagioclase is An48.9±4.3Ab46.9±3.4Or4.2±1.3 on average and ranges An42-59Ab39-53Or2.1-5.2 (n=14).

Specimens: 4.8 g at IfP. Remaining mass with S. Decker, Meteorite-Museum, 55430 Oberwesel, Germany.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Tindouf
Origin or pseudonym:Desert
Date:2014
Mass (g):24.1
Pieces:4
Class:Martian (shergottite)
Shock stage:high
Ferrosilite (mol%):56.8 (n=15); 21.7 (n= 14)
Wollastonite (mol%):16.4 (n=15); 33.6 (n=14)
Classifier:A. Bischoff, M. Patzek, S. Ebert, IfP
Type spec mass (g):4.8
Type spec location:IfP
Main mass:S. Decker, Meteorite-Museum, 55430 Oberwesel, Germany
Finder:unknown
Comments:Submitted by Ebert S.
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 32 approved meteorites from Tindouf, Algeria (plus 1 impact crater)
     This is 1 of 970 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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