Journal article
Osmium isotope evidence for a crustal origin of platinum group elements in the Sudbury nickel ore, Ontario, Canada
Abstract
Sulphide ores from the International Nickel Company's (INCO) Creighton Mine, Sudbury, were analysed for osmium isotope ratios by ICP-MS. Rhenium and osmium abundances were determined by isotope dilution using a mixed spike in solid solution in a nickel sulphide matrix. Calculated initial 187Os188Os ratios at 1.85 Ga (the emplacement age of the Sudbury complex) cluster around 0.60. The occurrence of less radiogenic compositions is attributed to …
Authors
Dickin AP; Richardson JM; Crocket JH; McNutt RH; Peredery WV
Journal
Geochimica et Cosmochimica Acta, Vol. 56, No. 9, pp. 3531–3537
Publisher
Elsevier
Publication Date
September 1992
DOI
10.1016/0016-7037(92)90396-z
ISSN
0016-7037