Meteoritical Bulletin: Entry for Northwest Africa 12326

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Northwest Africa 12326

Basic information

Name: Northwest Africa 12326
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12326
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 76.1 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	Eucrite-pmict
Recommended:			Eucrite-pmict [explanation]

This is 1 of 395 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 11 Dec 2018

Writeup

help

Writeup from MB 107:

Northwest Africa 12326 (NWA 12326)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, polymict)

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

Physical characteristics: Two grayish individuals with fusion crust.

Petrography: The meteorite is a polymict breccia composed of mineral and lithic clasts set into a fine-grained clastic matrix. Lithic clasts are fine- and coarse-grained about 0.2 to 1.5 mm sized basaltic clasts and dark about 0.1 to 4 mm sized impact melt clasts. Main minerals in basaltic clasts and matrix are exsolved pyroxene and calcic plagioclase. Minor phases include silica, chromite, ilmenite, and zircon. No metallic Fe has been detected.

Geochemistry: low-Ca pyroxene: Fs_55.1±0.3Wo_3.4±0.4(Fs_54.5-55.6Wo_2.7-4.2, n=14, FeO/MnO=31-36); Ca-pyroxene: Fs_31.6±5.0Wo_34.9±5.8(Fs_25.2-39.3Wo_26.1-42.2, n=16, FeO/MnO=29-34); calcic plagioclase: An_80.0±1.7(An_77.2-82.3, n=13)

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2016
Mass (g):	76.1
Pieces:	2
Class:	Eucrite-pmict
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	55.1; 31.6
Wollastonite (mol%):	3.4; 34.9
Classifier:	A. Greshake, MNB
Type spec mass (g):	19
Type spec location:	MNB
Main mass:	Franco Vignato
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. 107, MAPS 55, 460-462

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Geography:

Coordinates:

Unknown.

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

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