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Northwest Africa 15649
Basic information Name: Northwest Africa 15649
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15649
Observed fall: No
Year found: 2022
Country: Niger
Mass:help 5.59 kg
Meteoritical Bulletin:  MB 112  (2024)  L5
Recommended:  L5    [explanation]

This is 1 of 8963 approved meteorites (plus 5 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 29 Jan 2023
Writeup from MB 112:

Northwest Africa 15649 (NWA 15649)


Purchased: March 2022

Classification: Ordinary chondrite (L5)

History: Purchased on March, 2022 by Thomas C. Garner through a seller in Niamey, Niger.

Physical characteristics: Two identical looking stones, saw cut reveals a mottled tan and brown interior with mm sized metal blebs. The two stones may have broken apart in flight, as the fractured areas on both stones display what appears to be secondary fusion crust. The pieces fit together.

Petrography: (D. Dickens, CCMS) Microprobe and optical examination of polished probe mount shows sparse poorly delineated chondrules set in a recrystallized matrix. Kamacite was observed in mm sized blebs with staining occurring in adjacent silicates.

Geochemistry: (D. Dickens, CCMS, and A. S. Bell, CUB) Olivine Fa24.8±0.2, n=7; low-Ca pyroxene Fs21.0±0.5 Wo1.5±0.4, n=6.

Classification: Ordinary chondrite (L5)

Specimens: 31 g on deposit with Cascadia; 3.54 kg main mass is with Logan Garner, Thomas Garner holds a 2.14 kg mass.

Data from:
  Table 0
  Line 0:
Date:P March 2022
Mass (g):5590
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):24.8±0.2
Ferrosilite (mol%):21.0±0.5
Wollastonite (mol%):1.5±0.
Classifier:D. Dickens, CCMS
Type spec mass (g):31
Type spec location:Cascadia
Main mass:Logan Garner
Comments:Field name TG03; submitted by D. Dickens
   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)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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     This is 1 of 123 approved meteorites from Niger (plus 4 unapproved names)

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