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Northwest Africa 14245
Basic information Name: Northwest Africa 14245
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14245
Observed fall: No
Year found: 2020
Country: Morocco
Mass:help 69.2 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 515 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Sep 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14245 (NWA 14245)

Morocco

Purchased: October 2020

Classification: HED achondrite (Eucrite)

History: T. Mikouchi purchased the meteorite from a Moroccan dealer

Physical characteristics: A single rounded stone of 69.24 g, ~60% covered with fresh black shiny fusion crust. Broken surfaces reveal a light-gray interior, partly covered with brown desert soil.

Petrography: (T. Mikouchi: UTok) Monomict breccia consisting of lithic basaltic clasts with ophitic to subophitic textures and mineral fragments of pyroxene and plagioclase, set in a fine-grained clastic matrix. The sizes of pyroxene and plagioclase are up to 2 mm and both minerals show undulatory extinction. Augite exsolution lamellae in low-Ca pyroxene and vice versa (~10 μm wide). Accessory phases are a silica polymorph, ilmenite, chromite, and traces of troilite and Ni-poor Fe metal.

Geochemistry: Pyroxenes are low-Ca pyroxene (Fs59.3-64.8Wo1.2-4.8, N=131) and augite (Fs27.3-35.0Wo34.9-42.1, N=20). Wt% FeO/MnO of low-Ca pyroxene is 35-46. Plagioclase is An91.1-79.1Or0.1-1.2 (N=40).

Classification: Eucrite (monomict breccia)

Specimens: A 68.33 g type specimen is on deposit at UTok.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P October 2020
Mass (g):69.24 g
Pieces:1
Class:Eucrite
Shock stage:Moderate
Weathering grade:Minor
Ferrosilite (mol%):59.3-64.8;27.3-35.0
Wollastonite (mol%):1.2-4.8;34.9-42.1
Classifier:T. Mikouchi, UTok
Type spec mass (g):68.33 g
Type spec location:UTok
Main mass:T. Mikouchi, UTok
Comments:Submitted by T. Mikouchi (UTok)
Institutions
   and collections
UTok: University Museum, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan (institutional address; updated 3 Oct 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1676 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)

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