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Northwest Africa 15322
Basic information Name: Northwest Africa 15322
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15322
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 5.75 kg
Classification
  history:
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 1 Oct 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15322 (NWA 15322)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Eucrite, monomict)

History: Purchased from Adrar Algeria in 2021 by Edwin Thompson; subsequently acquired by Paul Stahura.

Physical characteristics: One stone with dark-brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is a breccia predominantly comprised of mm-sized, sub-angular basaltic clasts (most containing exsolved augite) and mineral fragments set within a dark, fine-grained matrix of the same composition containing accessory Cr-spinel, ilmenite, and SiO2-rich glass.

Geochemistry: Low-Ca Pyroxene (Fs63.0±1.2Wo2.6±0.6, range Fs60.4-65.2Wo2.0-4.6, Fe/Mn=31±1, n=23), Augite (Fs28.6±0.6Wo42.1±0.3, range Fs27.4-29.3Wo41.5-42.9, Fe/Mn=30±2, n=19), Calcic Plagioclase (An89.2±1.0, range An86.8-91.2, n=21).

Classification: Achondrite (eucrite, monomict breccia).

Specimens: 35.7 g at Cascadia, main mass with Paul Stahura.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):5750
Pieces:1
Class:Eucrite-mmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):63.0±1.2, 28.6±0.6
Wollastonite (mol%):2.6±0.6, 42.1±0.3
Classifier:D. Sheikh, Cascadia
Type spec mass (g):35.7
Type spec location:Cascadia
Main mass:Paul Stahura
Comments:CML 1532; 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)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
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 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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