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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
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 136 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 16 May 2022
Writeuphelp
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:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020
Mass (g):14 kg
Pieces:1
Class:Eucrite-unbr
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
Institutions
   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)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ryan Upchurch   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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