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Northwest Africa 14246
Basic information Name: Northwest Africa 14246
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14246
Observed fall: No
Year found: 2021
Country: Morocco
Mass:help 67.8 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 554 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 14246 (NWA 14246)

Morocco

Purchased: May 2021

Classification: HED achondrite (Eucrite)

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

Physical characteristics: A single irregular-shaped stone of 67.75 g showing dark surface color without fusion crust.

Petrography: (T. Mikouchi: UTok) Mostly unbrecciated coarse-grained (up to 2 mm) pyroxene and plagioclase with subequal modal abundances. Small portions of brecciated areas containing mineral and lithic clasts of pyroxene and plagioclase are present. Rare diogenitic orthopyroxne fragments (up to 0.5 mm) are present in the brecciated portion. Both pyroxene and plagioclase show undulatory extinction. Accessory phases are Fe sulfide, ilmenite, and a rare silica polymorph.

Geochemistry: Most pyroxenes are low-Ca pyroxene (Fs17.4-53.4Wo1.5-24.2, N=532) and rare augite (Fs28.1-34.0Wo25.9-35.0, N=11) is present. Wt% FeO/MnO of low-Ca pyroxene is 24-42. Plagioclase is An94.9-80.3Or0-1.5 (N=239).

Classification: Eucrite (polymict breccia)

Specimens: A 67.27 g type specimen is on deposit at UTok.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P May 2021
Mass (g):67.75 g
Pieces:1
Class:Eucrite
Shock stage:Moderate
Weathering grade:Minor
Ferrosilite (mol%):17.4-53.4;28.1-34.0
Wollastonite (mol%):1.5-24.2;25.9-35.0
Classifier:T. Mikouchi, UTok
Type spec mass (g):67.27 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 1840 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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