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Northwest Africa 15615
Basic information Name: Northwest Africa 15615
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15615
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 2.36 kg
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  L6
Recommended:  L6    [explanation]

This is 1 of 12900 approved meteorites (plus 11 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 7 Jan 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15615 (NWA 15615)

Morocco

Purchased: 2019

Classification: Ordinary chondrite (L6)

History: Purchased by Oz Backman in February of 2020 from Topher Spinnato who purchased it in June of 2019 from a Moroccan dealer.

Physical characteristics: Three fragments that fit together to form a single complete stone covered in a smooth weathered black fusion crust. Saw cut of the smallest fragment reveals a dark mottled brecciated interior with metal flecks and several intersecting black shock veins transiting the stone.

Petrography: (D. Dickens, CCMS and A. S. Bell, CUB) Optical and microprobe examination of polished mount shows a mostly recrystallized matrix of olivine and pyroxene with sparse relict chondrules. Secondary phases include plagioclase with grain size of approximately 70 µm, and stained kamacite. Shock effects were observed.

Geochemistry: (D. Dickens, CCMS and A. S. Bell, CUB) Olivine 24.1±0.4, n=3; low-Ca pyroxene Fs20.9Wo1.3, n=1.

Classification: Ordinary chondrite (L6)

Specimens: 20 g with probe mount on deposit at Cascadia, Oz Backman holds the main mass.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):2355
Pieces:3
Class:L6
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):24.1±0.4
Ferrosilite (mol%):20.9
Wollastonite (mol%):1.3
Classifier:Dustin Dickens, CCMS
Type spec mass (g):37g
Type spec location:Cascadia
Main mass:Oz Backman
Comments:Field name OZB-01; submitted by Dustin 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)
CCMS: Colorado Center for Meteoritic Studies 6200 Becker LN Loveland, CO 80538, United States (private address; updated 22 Jan 2024)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2089 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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