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Northwest Africa 15327
Basic information Name: Northwest Africa 15327
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15327
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 2 kg
Classification
  history:
Recommended:  CK6    [explanation]

This is 1 of 77 approved meteorites classified as CK6.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15327 (NWA 15327)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CK6)

History: Purchased in June of 2021 in Northwest Africa by an anonymous collector from a local meteorite dealer.

Physical characteristics: This meteorite is a single 2 kg stone with a slightly conical flight-oriented shape. It has a mostly intact but somewhat sand ablated fusion crust on the leading surface, and a well-preserved black frothy scoriaceous texture on the trailing surface. A ~25 mm diameter core was extracted at a depth of ~75 mm for analysis, exposing a grey-brown mottled interior.

Petrography: (D. Dickens, NMMS) Analysis of polished probe mount and BSE images shows a chondritic texture with sparse chondrule fragments and Cr-bearing magnetite set in a largely recrystallized silicate matrix. Olivine is Ni-bearing. Average size of plagioclase grains is >120 μm. Several CAIs were observed, but not quantitatively confirmed. Modal analysis of BSE images using ImageJ shows a silicate phase dominated by ~51.5% recrystallized nickel-bearing olivine, with chromium-bearing magnetite and other opaques embedded ubiquitously throughout the silicate phases comprising ~13%. Chondrule fragments, pyroxenes and plagioclase make up the remaining ~35.5%.

Geochemistry: (D. Dickens, NMMS and A. S. Bell, CUB) Olivine Fa27.8±0.2, Ni0.4±0.1, N=5, low-Ca pyroxene Fs28.5±2.9Wo1.7±0.4, N = 2, pigeonite Fs21.0Wo8.5 N=1, augite Fs19.2Wo23.0, N=1, plagioclase Ab67.9±3.3An28.4±4.0Or3.7±0.8, N = 5.

Classification: Carbonaceous chondrite CK6

Specimens: 20 g on deposit at Cascadia, an anonymous collector holds the main mass.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 2021
Mass (g):2000
Pieces:1
Class:CK6
Shock stage:low
Weathering grade:low
Fayalite (mol%):27.8±0.2
Ferrosilite (mol%):28.5±2.9, 16.6±1.3
Wollastonite (mol%):1.7±0.4, 15.8±210.3
Classifier:D. Dickens, NMMS
Type spec mass (g):20g
Type spec location:Cascadia
Main mass:Anonymous collector
Comments:Submitted by Dustin Dickens, Field name CMS01; submitted by D. Dickens
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)
CUB: Daniel Ozdín, Mineralogical Museum of Comenius University, Faculty of Natural Sciences, Ilkovicova 6, 842 15 Bratislava, Slovakia (institutional address; updated 2 Dec 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Dustin Dickens               
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8746 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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