Sulfur Isotopic Ratios of Molybdenites from the Hida Mountains
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概要
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Molybdenites occurring in Paleogene granitoids of the Northern Japan Alps of the Hida Mountains were analyzed for δ<SUP>34</SUP>S CDT at seven localities. The sulfur isotopic ratios vary from 3.0 to 6.4‰, which are within the range of ore molybdenites from the magnetite-series granitic terrane of the Sanin district, indicating that the Hida Mountains and Sanin district belong to the same metallogenic province. Porphyry-type molybdenite from the Kamioka lead-zinc mine has the δ<SUP>34</SUP>S value of 1.4‰. Sulfur of the molybdenite is not derived from the Jurassic Funatsu granitoids but brought up by the latest Cretaceous ilmenite-series magma, prior to the main Paleogene magnetiteseries magmatism.
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