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Northwest Africa 14694
Basic information Name: Northwest Africa 14694
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14694
Observed fall: No
Year found: 2021
Country: Morocco
Mass:help 740 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 588 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14694 (NWA 14694)

Morocco

Purchased: 2021

Classification: HED achondrite (Eucrite)

History: A 740 g stone was purchased from a dealer in Guelmim, Morocco, by a Steve Arnold from a local meteorite dealer in late November 2021.

Physical characteristics: Sample has a dark brown exterior and greenish-brown, brecciated interior.

Petrography: Description and classification (A. Love, App): Sample is a breccia composed of mineral fragments of exsolved, recrystallized pyroxenes and spherulitic-textured plagioclase contained within a micro-vesicular quenched melt matrix. Additional minerals are: ilmenite, chromite and a Si polymorph.

Geochemistry: (A. Love, App) low Ca pyroxene (Fs59.6±1.1Wo3.4±0.7, Mg#38.3±0.8, Fe/Mn=29.6±0.9, n=6); pigeonite (Fs55.2±2.6Wo9.1±3.6, Mg#39.3±0.7, Fe/Mn=29.2±0.7, n=4); high Ca Pyroxene (Fs26.4±0.6Wo44.2±0.8, Fe/Mn=29.3±1.2, n=12); plagioclase (An93.6±2.2Or0.2±0.1, n=10).

Classification: HED achondrite (eucrite melt breccia). Based on Fe/Mn ratios of pyroxenes, sample is an HED. Based on Mg# and Fs contents of pyroxenes, lithic clasts and mineral fragments are derived from basaltic eucrites.

Specimens: Steve Arnold holds the main mass. A polished thin section, a slice and an endcut weighing 20.2 g are on deposit at App.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Guelmim
Date:P 2021
Mass (g):740
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):59.6±1.1; 26.4±0.6
Wollastonite (mol%):3.4±0.7; 44.2±0.8
Classifier:Anthony Love
Type spec mass (g):20.2
Type spec location:App
Main mass:Steve Arnold
Comments:Submitted by Anthony Love
Institutions
   and collections		 App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater)

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