Meteoritical Bulletin: Entry for Northwest Africa 10344

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Northwest Africa 10344

Basic information

Name: Northwest Africa 10344
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10344
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 20 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	Martian (shergottite)
Recommended:			Martian (shergottite) [explanation]

This is 1 of 321 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 1 Nov 2015

Writeup

help

Writeup from MB 104:

Northwest Africa 10344 (NWA 10344)

(Northwest Africa)

Purchased: 2014

Classification: Martian meteorite (Shergottite)

History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: A small greenish-gray individual lacking any fusion crust was found in the North African desert.

Petrography: The meteorite displays an equigranular igneous texture of dominantly up to 1 mm sized olivine, pigeonite and maskelynite grains; minor phases include phosphates, sulfides, and chromite. The subhedral to euhedral olivine grains are often poikilitically enclosed by pyroxene. Both, pyroxene and olivine, frequently contain chromite inclusions. Olivine is compositionally homogeneous within each grain, but varies from grain to grain, ranging from Fa₃₈to Fa_40.Intense fracturing, conversion of plagioclase to maskelynite and strong mosaicism of olivine attest to a high degree of shock metamorphism. The meteorite is weakly weathered.

Geochemistry: olivine: Fa_38.7±0.5(37.9-39.6, n=20); FeO/MnO=44-53; pyroxene: Fs_28.5±1.5Wo_11.6±2.6(Fs_24.5-30.3Wo_7.3-16.2, n=20, FeO/MnO=24-30); feldspar: An_48.7±4.2Ab_48.6±3.4(An_42.2-53.4Ab_44.6-54, n=20).

Classification: Martian, Lherzolitic shergottite

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2014
Mass (g):	20
Pieces:	1
Class:	Martian (shergottite)
Shock stage:	S5
Weathering grade:	low
Fayalite (mol%):	38.7±0.5 (37.9-39.6, n=20)
Ferrosilite (mol%):	28.5
Wollastonite (mol%):	11.6
Classifier:	A. Greshake, MNB
Type spec mass (g):	4
Type spec location:	MNB
Main mass:	Harald Stehlik
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Stehlik: Harald Stehlik, 1220 Wien, Austria (private address)

Catalogs:

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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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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