Meteoritical Bulletin: Entry for Northwest Africa 13938

header

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 3 Jun 2023
Search for:	Search type:	Search limits:	Display:	Publication:
Names Text Places Classes Years	Contains Starts with Exact Sounds like	NonAntarctic Falls Non-NWAs Has strewnfield		What's new in the last:
Include past classifications in search		Has photo	Limit to approved meteorite names
Search text:

Northwest Africa 13938

Basic information

Name: Northwest Africa 13938
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13938
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 10 g

Classification
history:

Recommended:

Martian (shergottite) [explanation]

This is 1 of 293 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 18 Jun 2021

Writeup

help

Writeup from MB 110:

Northwest Africa 13938 (NWA 13938)

(Northwest Africa)

Purchased: 2021 Jan

Classification: Martian meteorite (Shergottite)

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

Physical characteristics: Three small light-grayish fragments with minor fusion crust.

Petrography: Coarse-grained igneous rock predominantly composed of up to 1.3 mm sized pyroxene and olivine grains and less abundant interstitial maskelynite. Pyroxene shows strong irregular compositional zoning. Olivine is only weakly zoned and often contains small magmatic inclusions with radial cracks extending in the host crystals. Minor phases include chromite (with variable Cr/Ti-ratios), ilmenite, troilite, and merrillite. Some cracks are filled with secondary calcite. The meteorite is highly shocked and contains shock melt veins and pockets.

Geochemistry: pyroxene: Fs_18.1±3.7Wo_22.2±11.5(Fs_12.6-24.8Wo_6.7-39.3, FeO/MnO=23±2, n=21); olivine: Fa_28.0±0.7(Fa_26.9-28.8, FeO/MnO=44±2, n=13); plagioclase: An_57.8±1.0Ab_40.5±1.0Or_1.7±0.2(An_55.8-59.3Ab_39.0-42.6Or_1.4-2.2, n=14)

Classification: Shergottite (olivine gabbroic).

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Temara, Morocco
Date:	P 2021 Jan
Mass (g):	10
Pieces:	3
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	moderate
Fayalite (mol%):	28.0
Ferrosilite (mol%):	18.1
Wollastonite (mol%):	22.2
Classifier:	A. Greshake, MNB
Type spec mass (g):	2
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; updated 24 Dec 2011)

Catalogs:

References:

Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

Find references in NASA ADS:
Find references in Google Scholar:

Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Said Yousfi

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

Direct link to this page