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Northwest Africa 12700
Basic information Name: Northwest Africa 12700
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12700
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 38.9 g
Classification
  history:
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 228 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12700 (NWA 12700)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite, monomict)

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

Physical characteristics: Flat shaped single stone partly covered by fusion crust.

Petrography: The meteorite is a breccia with fine- and coarse-grained 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 80 μm and 1 mm. Minor phases include silica, chromite, FeS, and ilmenite. No metallic Fe has been found.

Geochemistry: low-Ca pyroxene: Fs59.8±0.5Wo2.2±0.2 (Fs58.9-60.6Wo1.8-2.8, n=11, FeO/MnO=29-31); Ca-pyroxene: Fs25.4±0.9Wo43.5±1.0 (Fs24.1-27.0Wo41.8-45.0, n=15, FeO/MnO=26-35); calcic plagioclase: An91.7±0.6 (An90.7-92.8, n=16)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2019
Mass (g):38.9
Pieces:1
Class:Eucrite-mmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):59.8; 25.4
Wollastonite (mol%):2.2; 43.5
Classifier:A. Greshake, MNB
Type spec mass (g):7.9
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, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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