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Northwest Africa 13072
Basic information Name: Northwest Africa 13072
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13072
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 180 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 455 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 31 Jan 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13072 (NWA 13072)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Grayish rock partly covered with fusion crust.

Petrography: The meteorite is a fragmental breccia composed of basaltic clasts and abundant black impact melt clasts set into a fine-grained clastic matrix. Basaltic clasts and matrix are dominantly composed of exsolved pyroxene and plagioclase grains up to 2 mm in size. Minor phases include chromite, FeS, and silica. No metallic iron has been detected.

Geochemistry: large low-Ca pyroxene grains: Fs40.5±0.3Wo2.7±0.1 (Fs40.2-40.9Wo2.6-2.8, FeO/MnO=23-26, n=11); low-Ca pyroxene host to augite exsolution lamellae: Fs54.3±0.6Wo2.8±1.0 (Fs53.2-55.2Wo1.7-4.7, FeO/MnO=29-31, n=11); Ca-pyroxene exsolution lamellae: Fs28.4±1.1Wo37.7±1.4 (Fs26.4-31.1Wo34.1-39.9, FeO/MnO=24-31, n=12); calcic plagioclase: An93.9±0.4 (An93.1-94.5, n=12)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2018
Mass (g):180
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):40.5; 54.3; 28.4
Wollastonite (mol%):2.7; 2.8; 37.7
Classifier:A. Greshake, MNB
Type spec mass (g):20.6
Type spec location:MNB
Main mass:anonymous
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. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7171 approved meteorites from (Northwest Africa) (plus 2003 unapproved names)

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