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Northwest Africa 15308
Basic information Name: Northwest Africa 15308
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15308
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 4.09 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  L3.15
Recommended:  L3.15    [explanation]

This is 1 of 11 approved meteorites classified as L3.15.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15308 (NWA 15308)

(Northwest Africa)

Purchased: 2022 Apr

Classification: Ordinary chondrite (L3.15)

History: Purchased in April 2022 from a dealer in Temara, Morocco, by Ziyao Wang, who subsequently sold part of the material to Jiachang Yu in June 2022.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed unequilibrated chondrules (apparent diameter 760 ± 370 µm, N = 27) are set in a fine grained matrix (opaque in thin section) containing pervasively altered kamacite, taenite and troilite.

Geochemistry: Olivine (Fa20.7±18.4, range Fa1.1-55.1, N = 7; Cr2O3 in ferroan olivine 0.08-0.83 wt.%, mean 0.25 wt.%, sd 0.15 wt.%, N = 30), low-Ca pyroxene (Fs22.5±5.7Wo2.0±1.3, range Fs18.2-29.0Wo0.9-3.5, N = 4), subcalcic augite (Fs11.5Wo28.5; Fs22.3Wo22.0; N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.64.

Classification: Ordinary chondrite (L3.15). Petrologic subtype based on mean and standard deviation of Cr2O3 contents in ferroan olivine per Figure 15 in Grossman and Brearley (2005).

Specimens: 24.0 g including one polished thin section at UWB; 300 g with Mr. Jiachang Yu; main mass with WangZ.

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2022 Apr
Mass (g):4092
Pieces:1
Class:L3.15
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):20.7±18.4
Ferrosilite (mol%):22.5±5.7
Wollastonite (mol%):2.0±1.3
Magnetic suscept.:4.64
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.0
Type spec location:UWB
Main mass:WangZ and Jiachang Yu
Comments:Work names SY 105 and WZY-99; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Fujun Ren      
Ziyao Wang         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
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Revision
  history:
  This lists important revisions made to data for this record.

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