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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:
Recommended:  L3.15    [explanation]

This is 1 of 9 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
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 Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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