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Northwest Africa 14682
Basic information Name: Northwest Africa 14682
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14682
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 14 kg
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 117 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 16 May 2022
Writeup from MB 111:

Northwest Africa 14682 (NWA 14682)

(Northwest Africa)

Purchased: 2020

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased January, 2020, by Mark Lyon from a Northwest African dealer

Physical characteristics: Single stone with black fusion crust. Interior shows unbrecciated texture with millimeter-sized dark green pyroxenes and white plagioclase crystals. Cut and broken surfaces shows equigranular, medium grained, basaltic texture.

Petrography: (A. Ross, UNM; D. Dickens, NMMS; C. Agee, UNM) Microprobe examination of a polished mount shows approximately equal amounts of pyroxene and plagioclase grains often in poikiloblastic arrangement. Some pyroxenes have exsolution. Ubiquitous silica, ilmenite, and troilite. No metal was observed.

Geochemistry: (A. Ross, UNM) Low-Ca pyroxene Fs61.7±0.2Wo1.8±0.2, Fe/Mn=33±1, n=7; high-Ca pyroxene Fs29.5±5.0Wo40.0±5.8, Fe/Mn=32±2, n=5; plagioclase An84.7±4.3, n=7;

Classification: Achondrite (equilibrated unbrecciated eucrite). Equilibration and clear compositional separation of low-calcium and high-calcium pyroxenes is consistent with type 6 eucrites.

Specimens: 28.6 g including a probe mount on deposit at UNM, Mark Lyon holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020
Mass (g):14 kg
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):61.7±0.2
Wollastonite (mol%):Wo1.8±0.2
Classifier:C. Agee, UNM; D. Dickens, NMMS
Type spec mass (g):28.6
Type spec location:UNM
Main mass:Mark Lyon
Comments:Field Name ML-8; submitted by D. Dickens
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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