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Northwest Africa 14634
Basic information Name: Northwest Africa 14634
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14634
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1600 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 240 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 19 Feb 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14634 (NWA 14634)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Eucrite, brecciated)

History: Purchased by Chris Colvin in 2021 by a meteorite dealer in Algeria.

Physical characteristics: Single stone with minor fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is a breccia composed of mm-sized sub-rounded clasts (primarily basaltic clasts, mineral grain sizes ~50 μm) set within a finer-grained matrix (grain size ~15 μm) containing accessory ilmenite, troilite, and SiO2-rich glass.

Geochemistry: Low-Ca Pyroxene (Fs61.7±0.6Wo2.1±0.8, range Fs60.0-62.6Wo1.5-4.8, Fe/Mn=31±4, n=24), Pigeonite (Fs54.3±5.0Wo11.1±5.7, range Fs45.4-59.5Wo5.7-21.8, Fe/Mn=31±4, n=10), Augite (Fs28.7±4.4Wo40.4±5.2, range Fs25.2-36.8Wo31.3-44.3, Fe/Mn=34±5, n=15), Plagioclase (An86.5±8.9Or1.4±1.2, range An74.2-96.4Or0.1-4.1, n=15).

Classification: HED achondrite (Eucrite, brecciated)

Specimens: 23 g at Cascadia, main mass with Chris Colvin

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):1600
Pieces:1
Class:Eucrite-br
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):61.7±0.6, 54.3±5.0, 28.7±4.4
Wollastonite (mol%):2.1±0.8, 11.1±5.7, 40.4±5.2
Classifier:D. Sheikh, Cascadia
Type spec mass (g):23
Type spec location:Cascadia
Main mass:Chris Colvin
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
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. ?
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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