21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g
21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g 21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g 21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g 21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g 21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g 21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g 21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g 21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g

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21369 - Top "Black Beauty" NWA 11921 MARTIAN METEORITE Polymict Breccia 0,03g

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Species
NWA 11921 "Black Beauty" Martian Polymict Breccia Meteorite
Age
-
Location
Fell in Occidental Sahara Desert, Northwest Africa
Formation
Martian (Polymict breccia)
Size
5.1 mm   •    in
Weight
0 g   •    oz
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Description

 

Beautiful and authentic example of 0,03g of this unique type of MARTIAN METEORITE.

Guaranteed by IMCA (International Meteorite Collectors Association) member 2973 and Geologist Juan Avilés Poblador

 Meteoritical Bulletin Database

Northwest Africa 11921
Basic information Name: Northwest Africa 11921
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11921 
Observed fall: No
Year found: 2018
Country: (Northwest Africa) 
Mass:help 7.7 g
Classification
  history:
Recommended:   Martian (polymict breccia)    [explanation]

This is 1 of 17 approved meteorites classified as Martian (polymict breccia).   [show all]
Search for other: Martian meteorites
Comments: Approved 15 Sep 2018
Revised 16 Nov 2018: Updated class; see NWA 7034)
Writeuphelp
Writeup from MB 107: 

Northwest Africa 11921 (NWA 11921)

(Northwest Africa)

Purchased: 2018

Classification: Martian meteorite

History: Reportedly recovered in 2017 at the find site of NWA 7034 and purchased by Said Yousfi in 2018 from a local meteorite dealer in Zagora, Morocco.

Physical characteristics: Six black fragments with shiny crust.

Petrography: The meteorite is a polymict breccia composed of lithic and mineral clasts set into a very fine-grained clastic matrix. Lithic clasts include basaltic and impact melt types; most abundant mineral phases in clasts and matrix are pyroxene and feldspar, both of highly variable composition. Minor phases are ilmenite, magnetite, Ti,Cr-magnetite, and Cl-apatite. The meteorite’s high magnetic susceptibility reflects the high content of Fe-oxides and is in good agreement with data in Gattacceca et al. 2014.

Geochemistry: low-Ca pyroxene: Fs25.1±5.5Wo3.6±1.1 (Fs19.5-33.5Wo2.0-5.0, n=15, FeO/MnO=30-38); pigeonite: Fs39.9±12.0Wo8.0±2.7 (Fs25.6-52.3Wo5.6-12.4, n=10, FeO/MnO=30-40); Ca-pyroxene: Fs25.8±10.2Wo36.7±6.5 (Fs17.4-44.3Wo26.1-43.3, n=15, FeO/MnO=26-41); feldspar: An40.4±9.2Ab56.5±8.2Or3.1±1.9 (An29.0-49.3Ab48.3-66.7Or2.0-4.4, n=13)

Classification: Martian meteorite (basaltic breccia). Likely paired with NWA 7034 and respective clan members.

Bibliography:
  • Gattacceca J., Suavet C., Rochette P., Weiss B.P., Winklhofer M., Uehara M. Friedrich J.M. (2014) Metal phases in ordinary chondrites: magnetic hysteresis properties and implications for thermal history. Meteorit. Planet. Sci. 49 652-676/ (link)
Data from:
  MB107
  Table 0
  Line 0:
Place of purchase: Zagora, Morocco
Date: P 2018
Mass (g): 7.7
Pieces: 6
Class: Martian
Weathering grade: low
Ferrosilite (mol%): 25.1; 39.9; 25.8
Wollastonite (mol%): 3.6; 8.0; 36.7
Magnetic suscept.: 4.42
Classifier: A. Greshake, MNB
Type spec mass (g): 1.55
Type spec location: MNB
Main mass: Said Yousfi
Comments: Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
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