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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:
Recommended:  Eucrite-br    [explanation]

This is 1 of 219 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 Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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