Meteoritical Bulletin: Entry for Northwest Africa 12701

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Northwest Africa 12701

Basic information

Name: Northwest Africa 12701
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12701
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 305 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 12701 (NWA 12701)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite, monomict)

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

Physical characteristics: Single stone lacking any fusion crust.

Petrography: The meteorite is a breccia with up tp 7 mm 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 30 μm and 1 mm. Minor phases include silica, chromite, FeS, ilmenite, and metallic Fe.

Geochemistry: pyroxene host to augite lamellae: Fs_66.1.0±1.9Wo_3.3±0.6(Fs_60.4-67.5Wo_3.0-4.7, n=12, FeO/MnO=31-34); Ca-pyroxene: Fs_27.1±1.1Wo_41.1±0.6(Fs_25.3-28.7Wo_40.0-42.5, n=9, FeO/MnO=29-32); diogenitic pyroxene: Fs_31.4±3.5Wo_3.2±0.4(Fs_28.8-38.1Wo_2.4-4.0, n=12, FeO/MnO=27-33); calcic plagioclase: An_92.1±0.9(An_90.4-93.6, n=13)

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Guelmim, Morocco
Date:	P 2019
Mass (g):	304.7
Pieces:	1
Class:	Eucrite-mmict
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	66.1; 27.1; 31.4
Wollastonite (mol%):	3.3; 41.1; 3.2
Classifier:	A. Greshake, MNB
Type spec mass (g):	28.7
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)
Ryan Upchurch

Geography:

Coordinates:

Unknown.

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

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