Meteoritical Bulletin: Entry for Northwest Africa 12706

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Northwest Africa 12706

Basic information

Name: Northwest Africa 12706
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12706
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 130.7 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Eucrite-mmict
Recommended:			Eucrite-mmict [explanation]

This is 1 of 293 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 18 Aug 2019

Writeup

Writeup from MB 108:

Northwest Africa 12706 (NWA 12706)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite, monomict)

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

Physical characteristics: Several small fragments ranging from 2.53 g to less than 0.1 g.

Petrography: The meteorite is a breccia with small up to 700 μm sized basaltic and black melt clasts set into a clastic mineral matrix. Dominant minerals are exsolved pyroxene and calcic plagioclase of highly variable grain sizes between 10 and 400 μm. Minor phases include silica, chromite, FeS, and fayalite. No metallic Fe has been found.

Geochemistry: low-Ca pyroxene: Fs_56.0±2.8Wo_3.2±0.8(Fs_52.9-59.4Wo_2.3-4.2, n=11, FeO/MnO=30-35); Ca-pyroxene: Fs_28.9±1.0Wo_41.0±2.0(Fs_27.4-31.0Wo_36.7-42.5, n=15, FeO/MnO=26-36); calcic plagioclase: An_90.8±1.0(An_89.1-92.2, n=14)

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Zagora, Morocco
Date:	P 2019
Mass (g):	130.7
Pieces:	several
Class:	Eucrite-mmict
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	56.0; 28.9
Wollastonite (mol%):	3.2; 41.0
Classifier:	A. Greshake, MNB
Type spec mass (g):	24
Type spec location:	MNB
Main mass:	Fabien Kuntz
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

Find references in NASA ADS:
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Photos:

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

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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