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Northwest Africa 11647
Basic information Name: Northwest Africa 11647
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11647
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 39 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 355 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 20 Feb 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11647 (NWA 11647)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was bought from a meteorite dealer at the mineral fair in St. Marie-aux Mines, France.

Physical characteristics: Grayish fragment partly covered with fusion crust.

Petrography: The meteorite is a polymict breccia with basaltic and black melt clasts set into a clastic mineral matrix. Dominant minerals are magmatically zoned low-Ca pyroxenes, Fe-rich low-Ca pyroxenes with augite exsolution lamellae and calcic plagioclase. Minor phases include silica, chromite, FeS, and ilmenite. No metallic Fe has been found.

Geochemistry: zoned low-Ca pyroxene Fs26.7±2.3Wo2.9±0.8 (Fs23.5-29.2Wo2.0-5.1, n=15, FeO/MnO=27-33); low-Ca pyroxene host to augite exsolution lamellae: Fs43.4±0.3Wo2.9±0.3 (Fs43.0-44.1Wo2.6-3.5, n=12, FeO/MnO=32-36); Ca-pyroxene: Fs21.0±0.3Wo40.0±0.2 (Fs20.3-21.5Wo40.3-41.1, n=13, FeO/MnO=26-32); calcic plagioclase: An90.7±1.1 (An89.3-92.4, n=14)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:St Marie-aux Mines, France
Date:P 2016
Mass (g):39
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):26.7; 43.4; 21.0
Wollastonite (mol%):2.9; 2.9; 40.0
Classifier:A. Greshake, MNB
Type spec mass (g):8.6
Type spec location:MNB
Main mass:Jürgen Nauber / jnmczurich
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
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7810 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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