Meteoritical Bulletin: Entry for Northwest Africa 13415

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 29 Jan 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 13415

Basic information

Name: Northwest Africa 13415
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13415
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 286 g

Classification
history:

Recommended:

Eucrite [explanation]

This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 19 Sep 2020

Writeup

Writeup from MB 109:

Northwest Africa 13415 (NWA 13415)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite)

History: The meteorite was purchased from a local meteorite dealer in Tindouf, Algeria.

Physical characteristics: Dark brownish individual with minor fusion crust.

Petrography: The meteorite is an unbrecciated fine-grained volcanic rock with some interspersed more coarse-grained regions. Dominant minerals are exsolved pyroxene and calcic plagioclase with grain sizes of 30-50 μm in fine-grained parts and 200-500 μm in coarse-grained regions. Minor phases include silica, chromite, FeS, ilmenite, and metallic Fe.

Geochemistry: low-Ca pyroxene: Fs_63.1±0.5Wo_6.9±0.5(Fs_62.3-64.0Wo_5.8-7.4, n=15, FeO/MnO=29-31); Ca-pyroxene: Fs_32.4±0.5Wo_42.4±0.5(Fs_31.6-33.2Wo_41.3-43.3, n=16, FeO/MnO=32-36); calcic plagioclase: An_89.3±1.4(An_87.9-91.9, n=14)

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Tindouf, Algeria
Date:	P 2019
Mass (g):	286
Pieces:	1
Class:	Eucrite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	63.1; 32.4
Wollastonite (mol%):	6.9; 42.4
Classifier:	A. Greshake, MNB
Type spec mass (g):	45.4
Type spec location:	MNB
Main mass:	Salamu Ali
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 Meteoritical Bulletin, no. 109, in preparation (2020)

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)
Robert Smart

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

Direct link to this page