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70.5g Martian Meteorite Slice I Mars SHERGOTTITE - NWA 13227

Top Meteorite

  • $ 17,500.00


On Offer: 70.5g Martian Meteorite Slice.

Slice Dimensions: Approximately 113.5mm x 105.5mm x 2.9mm

Type / Class: Martian Meteorite

Subclass: Shergottite
Origin: MARS
Official name: NWA 13227
Description: A 70.5 gram piece of Mars ejected by a meteorite impacting the surface of the Red Planet and hurling it to Earth. A lovely 70.5 gram specimen of a part of the SNC group of martian meteorites known as "Shergottite" NWA 13227 showing shock veins. 
Shock veins occur when there is a powerful collision in space involving two large objects like asteroids and planets. These collisions produce enough pressure and heat to melt portions of the rock, which then re-solidify into a vein-shaped pattern.
What you get: 70.5g NWA 13227 Martian Meteorite Specimen as  shown, signed Certificate of Authenticity.
I offer a 100% no questions asked 30 day return policy.  

Northwest Africa 13227
Basic information Name: Northwest Africa 13227
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13227
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 2.3 kg
Recommended:   Martian (shergottite)    [explanation]

This is 1 of 241 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 5 Apr 2020
Writeup from MB 109:

Northwest Africa 13227 (NWA 13227)

(Northwest Africa)

Purchased: 2019 Nov

Classification: Martian meteorite (Shergottite)

History: Purchased by Mark Lyon in November 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Coarse grained (gabbroic) assemblage of zoned clinopyroxene (up to 3.5 mm), olivine (some as inclusions in clinopyroxene) and curvilinear, lath-like maskelynite (~15 vol.%), together with accessory Mg-ilmenite, Cr-ulvöspinel, pyrrhotite, baddeleyite, merrillite and chlorapatite. Minor veinlets of secondary calcite are present.

Geochemistry: Olivine (Fa35.5-51.6, FeO/MnO = 50-55, N = 11), pigeonite cores (Fs25.6-28.2Wo5.2-9.3, FeO/MnO = 28-33, N = 6), subcalcic augite rims (Fs21.5-21.6Wo31.3-31.8; Fs28.0Wo26.9; FeO/MnO = 27-30, N = 3), pigeonite rims (Fs34.6-36.6Wo12.3-15.7, FeO/MnO = 30-33, N = 3), maskelynite (An51.7-57.1Or1.8-2.8, N = 4).

Classification: Shergottite (olivine gabbroic).

Specimens: 21.6 g including one polished thin section at UWB; remainder with Mr. M. Lyon.

Data from:
  Table 0
  Line 0:
Place of purchase: Morocco
Date: P 2019 Nov
Mass (g): 2300
Pieces: 1
Class: Martian (shergottite)
Shock stage: high
Weathering grade: low
Fayalite (mol%): 35.5-51.6
Ferrosilite (mol%): 25.6-28.2; 21.5-21.6; 34.6-36.6
Wollastonite (mol%): 5.2-9.3; 31.3-31.8; 12.3-15.7
Classifier: A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g): 21.6
Type spec location: UWB
Main mass: M. Lyon
Comments: Work name Lyon19-3; submitted by A. Irving

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