Meteoritical Bulletin: Entry for Northwest Africa 13190

header

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 24 Apr 2024
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 13190

Basic information

Name: Northwest Africa 13190
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13190
Observed fall: No
Year found: 2019
Country: Algeria
Mass: 49 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	Martian (shergottite)
Recommended:			Martian (shergottite) [explanation]

This is 1 of 322 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 29 Feb 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13190 (NWA 13190)

Algeria

Find: 2019

Classification: Martian meteorite (Shergottite)

History: Purchased in 2019 by Miguel Angel Contreras Gomez from a meteorite dealer in Algeria.

Physical characteristics: This sample has a weathered fusion crust exterior, however the interior remains fresh.

Petrography: (D. Sheikh, FSU) Sample is a diabase having a predominantly subophitic texture composed of complexly zoned, tabular and prismatic (sometimes twinned) chadacrysts of subcalcic augite and pigeonite (Av. 330±50 µm, up to 1mm, 60 vol%) contained within larger oikocrysts of maskelynite (Av. 800±100 µm, up to 2 mm, 40 vol%). Accessory phases include titanomagnetite (some Cr rich), ilmenite, silica, Si-Al-K-Na rich glass, merrillite, and pyrrhotite.

Geochemistry: Subcalcic augite (Fs_32.3±6.6Wo_30.7±2.3, range Fs_21.7-47.7Wo_25.4-35.2, FeO/MnO=34±6, n=37) pigeonite (Fs_52.7±8.5Wo_14.4±2.3, range Fs_30.6-72.3Wo_10.0-19.3, FeO/MnO=36±4, n=54) maskelynite (An_48.9±5.1Or_1.9±1.0, range An_41.4-55.7Or_0.3-3.8, n=43).

Classification: Martian (shergottite, diabasic) Silicate chemistry, the presence of maskelynite, FeO/MnO ratios of pyroxenes, and magnetic susceptibility provide support for classification as shergottite. Average grain sizes of pyroxenes and maskelynite larger than that of basaltic shergottites, but smaller than gabbroic shergottites, hence diabasic.

Specimens: 10.02 grams at UCLA; main mass with Miguel Angel Contreras Gomez.

Data from:
  MB109
  Table 0
  Line 0:

Date:	2019
Mass (g):	49
Pieces:	10
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	52.7±8.5, 32.3±6.6
Wollastonite (mol%):	14.4±2.3, 30.7±2.3
Magnetic suscept.:	3.53
Classifier:	D. Sheikh, FSU
Type spec mass (g):	10.02
Type spec location:	UCLA
Main mass:	Miguel Angel Contreras Gomez
Comments:	Submitted by Daniel Sheikh

Institutions
and collections

UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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

Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Xingyu Chen
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
chen pan
chen wang
Cong Wang
Domjan Svilkovic
Eric Escrich
Ryan Upchurch
Public domain photographs:
Daniel Sheikh

Geography:

Algeria

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1358 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

Direct link to this page