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Northwest Africa 15651
Basic information Name: Northwest Africa 15651
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15651
Observed fall: No
Year found: 2022
Country: Niger
Mass:help 1420 g
Meteoritical Bulletin:  MB 112  (2024)  L3
Recommended:  L3    [explanation]

This is 1 of 853 approved meteorites (plus 2 unapproved names) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 29 Jan 2023
Writeup from MB 112:

Northwest Africa 15651 (NWA 15651)


Purchased: March 2022

Classification: Ordinary chondrite (L3)

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

Physical characteristics: A single dark brown stone with what appear to be many tightly packed chondrules visible through sand poplished exterior. Saw cut reveals a dark brown interior with many closely packed chondrules and chondrule fragments. Metal is not easily visible with the unaided eye.

Petrography: (D. Dickens, CCMS) Microprobe and optical examination of polished probe mount shows a chondritic texture with tightly packed well-delineated chondrules with an apparent diameter 613±230 µm (n=12). Several chondrules with apparent diameter of between 2mm and 3mm were observed in hand samples but were not seen in the BSE images examined. Olivine appears to be zoned. Accessory opaque phases include kamacite and troilite.

Geochemistry: (D. Dickens, CCMS, and A. S. Bell, CUB) Olivine Fa21.7±9.2, n=8; low-Ca pyroxene Fs9.4±1.0Wo0.9±0.8, n=7.

Classification: Ordinary chondrite (L3)

Specimens: 30 g on deposit with Cascadia; Main mass with Logan Garner.

Data from:
  Table 0
  Line 0:
Date:P March 2022
Mass (g):1420
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):21.7±9.2
Ferrosilite (mol%):9.4±1.0
Wollastonite (mol%):0.9±0.8
Classifier:D. Dickens, CCMS
Type spec mass (g):30
Type spec location:Cascadia
Main mass:Logan Garner
Comments:Field name TG01; 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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