Magnetic spherules from Pleistocene sediments in Alberta, Canada

Details Magnetic spherules from Pleistocene sediments in Alberta, Canada Magnetic spherules from Pleistocene sediments in Alberta, Canada

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994metic..29...88b&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 29, no. 1, p. 88-93

Mathematics

Logic

4

Cosmochemistry, Iron Alloys, Mineral Deposits, Spherules, Alberta, Morphology, X Ray Diffraction, Earth, Samples, Terrestrial, Spherules, Sediments, Composition, Wustite, Magnetite, Metal, Core, Origin, Source, Comparison, Morphology, Nickel, Sem, Xrd, Chemistry, Structure, Procedure, X-Ray Methods, Concentration, Mineralogy, Electron Microscopy, Laboratory Studies, Microprobe Methods

Scientific paper

Magnetic spherules have recently been found in Pleistocene sediments in Alberta, Canada. The spherules are composed of magnetite (FeFe2O4) and wuestite (Fe(1-x)O); some have metallic cores composed of pure alpha-Fe metal. Other metal cores contain from 0.1% to 0.88% Ni by weight. Comparison of morphology, internal structure and chemical and mineralogical compositions with those spherules of known origin suggests that the Alberta spherules are of extraterrestrial origin.

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