Petrologic study on the Paleozoic ophiolites and high-P metamorphic rocks in Japan (especially in the Joetsu belt)

Ishiwatari和Tsujimori(2003)综合了日本和俄罗斯滨海蛇绿岩和高磷变质岩的时空分布，得出了日本海中新世以前这两个地区的地质连续性。他们进一步假设，日本晚古生代蛇绿岩和高P变质带向西延伸到中国苏鲁-大别碰撞带，途经琉球群岛西部，绕过朝鲜。Ishiwatari，Sokolov&Vysotski(2003)发现日本和俄罗斯远东地区的蛇绿岩具有高度亏损方辉橄榄岩和OPX型堆积的共同特征，并推测马里亚纳型蛇绿岩(和蓝片岩)的形成和南开型沉积物的积累在显生宙期间相继重复，导致了多条蛇绿岩带的形成。Ichiyama和Ishiwatari(2004年)对雅库诺镇地区的雅库诺蛇绿岩进行了研究，并得出结论，该蛇绿岩形成了…更多的是在弧后环境中，而不是一些地质学家假设的海洋高原中。Ishiwatari和Ichiyama(2004年)汇编了产于日本、俄罗斯滨海和库页岛以及中国东北部的超镁铁质熔岩和阿拉斯加型侵入岩的地质和岩石学资料，并得出结论：这些特殊的岩石可能是侏罗纪时袭击东亚边缘俯冲带的直径2,000公里的超柱岩浆作用形成的，尽管其中一些代表了大洋环境下的二叠纪超柱活动。Ichiyama&Ishiwatari(2005)报道了晚二叠世硅质岩序列中夹有富含HFSE的苦苦石(微晶石岩)岩床和透明碎屑岩，覆盖在山体的巨大石灰岩-绿岩体之上。矿区带中的富纳福斯-雅玛，一个侏罗纪增生杂岩。他们发现，岩浆类似于西伯利亚二叠纪嘴唇中的超镁铁质岩浆，并推测为与超柱有关的HIMU来源。Shimizu和Ishiwatari(正在筹备中)研究了珠江带晚古生代高压变质岩(蓝闪片岩和泥质片岩)，认为该带由高磷和中磷变质带组合而成。较少

Ishiwatari & Tsujimori (2003) synthesized the time-space distribution of ophiolites and high-P metamorphic rocks in Japan and Russian Primorye, and concluded geological continuity between the two areas before the Miocene opening of the Sea of Japan. They further postulated a hypothesis that the Japanese Late Paleozoic ophiolites and high-P metamorphic belts extend to the west to the Chinese Sulu-Dabie collision zone via Yaeyama (western Ryukyu Islands), detouring Korea. Ishiwatari, Sokolov & Vysotskiy (2003) found that ophiolites in Japan and Russian Far East are characterized by common occurrence of highly depleted harzburgite and opx-type cumulate, and postulated that the Mariana-type ophiolite (and blueschist) formation and the Nankai-type accretion of sediments repeated one after another through the Phanerozoic time, resulting in the multiple ophiolite belts. Ichiyama & Ishiwatari (2004) studied the Yakuno ophiolite in the Yakuno Town area, and concluded that this ophiolite formed … More in a back-arc environment, not in an oceanic plateau as postulated by some geologists. Ishiwatari & Ichiyama (2004) compiled geologic and petrologic data about ultramafic lavas and the Alaskan-type intrusive rocks occurring in the accretionary complexes in Japan, Russian Primorye and Sakhalin, and northeastern China, and concluded that these peculiar rocks may have formed by a superplume magmatism of 2,000 km diameter which hit subductien zones in the East Asian margin in the Jurassic time, though some of them represent Permian superplume activity in an oceanic environment. Ichiyama & Ishiwatari (2005) reported a HFSE-rich picrite (meimechite) sills and hyaloclastites intercalated in the Late Permian chert sequence overlying a huge limestone-greenstone body of Mt. Funafuse-yama in the Mine belt, a Jurassic accretionary complex. They find that the magma resembles ultramafic magmas in the Permian Siberian LIP, and postulated a superplume-related, HIMU-source origin. Shimizu & Ishiwatari (in preparation) studied Late Paleozoic high-pressure metamorphic rocks (glaucophane schist and pelitic schist) of the Joetsu belt, and concluded that the belt consisted of a combination of high-P and medium-P metamorphic belts. Less