Indian MORB-type mantle beneath the Kuril Island arc: Isotopic investigation of the mafic lavas of Kunashir Island |
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| Authors: | Yu A Martynov J -I Kimura A Yu Martynov A V Rybin M Katakuse |
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| Affiliation: | 1.Far East Geological Institute, Far East Branch,Russian Academy of Sciences,Vladivostok,Russia;2.Institute for Research on Earth Evolution,Japan Agency for Marine-Earth Science and Technology,Yokosuka,Japan;3.Institute of Marine Geology and Geophysics, Far East Branch,Russian Academy of Sciences,Yuzhno-Sakhalinsk,Russia;4.Kansai Construction Survey Co., Ltd.,Osaka,Japan |
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| Abstract: | New data on the Hf, Pb, and Nd isotopes of the mafic rocks of various ages from Kunashir Island were used to address the nature
of the sub-arc mantle of the southern segment of the Kuril island arc. At least since Late Cenozoic, its isotopic characteristics
have been the MORB-type mantle of the Indian Ocean. Its boundary with the mantle reservoir of the Pacific MORB-type coincided
probably with the Kuril-Kamchatka Trench. |
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