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» Meteorite: WHITECOURT

Whitecourt
53°59.95’N, 115°35.85’W
Alberta, Canada
Find: 1 July 1 2007
Iron, medium octahedrite (IIIAB)

History:
Four small fragments were found buried adjacent to a circular depression by two local residents using a metal detector. The circular depression was subsequently confirmed as a 36 m diameter Late Holocene impact crater based on morphology, identification of impact ejecta and crater fill, and presence of impact melt (C. Herd and D. Froese, University of Alberta), and further fragments were recovered.

Physical characteristics:
The meteorite consists of 74 samples with a total mass of 5372 g. The samples were found buried up to 25 cm and have a red-brown exterior.

Petrography:
Widmanstätten pattern with an average bandwidth of 0.8 ± 0.2 mm and areas of plessite are evident on polished and etched surfaces. Locally, kamacite lamellae are coarser and taenite lamellae are offset as a result of shock deformation and recrystallization. Rare Fe-Ni phosphide inclusions are present.

Mineral compositions and geochemistry:
Bulk composition: INAA data (J. Duke, UAb): Ni = 8.11 ± 0.13 wt%, Co = 4950 ± 100 µg/g, Ir 10.3 ± 0.5 µg/g, (uncertainties 1?, 68% confidence level), Ge ? 40 µg/g, indicate the IIIAB group.

Classification:
Iron, IIIAB medium octahedrite, extensive shock, moderate weathering.

Weight	Description	Prices
46.9g 30x28x20 mm	Name : Whitecourt Class : Iron, medium octahedrite IIIAB Region: Alberta, Canada Date : 01 July 2007 TKW : 5372g	7.0$/g = 328$
62.1g 39x30x15 mm	complete specimen	7.0$/g = 435$
28.6g 29x20x16 mm	complete specimen	7.0$/g = 200$
32.8g 34x33x9 mm	complete specimen	7.0$/g = 229$
11.5g 28x23x6 mm	complete specimen	7.0$/g = 80$
18.7g 25x18x13 mm	complete specimen	7.0$/g = 130$
11.6g 23x18x9 mm	complete specimen	7.0$/g = 81$
12.1g 27x20x7 mm	complete specimen	7.0$/g = 85$
11.5g 27x19x10 mm	complete specimen	7.0$/g = 80$
12.9g 24x20x7 mm	complete specimen	7.0$/g = 90$
11.9g 23x15x10 mm	complete specimen	7.0$/g = SOLD
11.0g 24x16x9 mm	complete specimen	7.0$/g = 77$
6.8g 21x19x7 mm	complete specimen	7.0$/g = SOLD

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