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Sulfur isotopic characteristics of late Cenozoic ore deposits at the arc junction of Hokkaido, Japan
Author(s) -
Ishihara Shunso,
Sasaki Akira
Publication year - 1994
Publication title -
island arc
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.554
H-Index - 58
eISSN - 1440-1738
pISSN - 1038-4871
DOI - 10.1111/j.1440-1738.1994.tb00100.x
Subject(s) - geology , terrane , cenozoic , basement , igneous rock , geochemistry , island arc , subduction , paleontology , structural basin , tectonics , archaeology , history
Sulfide minerals of late Cenozoic vein‐type deposits of southwest Hokkaido and Kuril Islands yielded δ 34 CDT S values of 2 to 8 permil, which are typical green‐tuff values of magnetite‐series igneous terrane. Sulfides of the Kitami district of northeast Hokkaido, on the other hand, are characterized by negative δ 34 S CDT values, ranging from 0 to ‐ 7 permil. This unique value among ore deposits in the late Cenozoic back‐arc terranes in the Japanese Islands is considered to have resulted from extraction of 32 S enriched sulfur from the basement rocks, because of well‐developed N‐S fracturing in the basement, which is characteristic of the axial belt and Kitami district of Hokkaido.