Secular variation of marine Os isotopes reconstructed from Fe-Mn sediments in the Phanerozoic accretionary complexes

我们推动了我们的研究计划，以利用日本增生杂岩中的数字沉积物重建海洋Os同位素的长期变化。因此，我们成功地重建了约350 Ma以来海洋Os同位素的长期变化曲线。取得了以下成果：在《地球化学-地球物理-地球系统》杂志(2005)上发表了《日本晚白垩世增生杂岩中成矿岩柱的常量元素和微量元素地球化学及Os同位素组成》一文。此外，我们还在《资源地质学》特刊上发表了三篇关于日本四国中部北七知带含金属矿柱和伴生绿岩的地球化学及其沉积时代的论文，题为《潘塔拉萨的海底过程和相关矿化：来自日本吸积杂岩的显生宙记录-第一部分》。我们已向地球科学研究领域的顶级期刊《地球科学与宇宙学报》提交了题为《日本第三纪增生杂岩中的生物群：古海水Os同位素组成的记录》的论文。此外，我们还向《自然》杂志提交了题为《27.6亿多年前含氧地下水形成赤铁矿》的论文。本文是关于Re-Os测年的研究。此外，我们还准备了另一篇题为“白垩纪的海洋Os同位素记录：来自日本和阿曼吸积杂岩中的金属泵的证据”的论文，将提交给地球和行星科学快报。

We promoted our research program in order to reconstruct a secular variation of marine Os isotopes by using umber deposits in the Japanese accretionary complexes. Consequently, we are successful in reconstructing a secular variation curve of marine Os isotopes since 〜350 Ma. We have obtained the following results.We published the paper entitled "Major and trace element geochemistry and Os isotopic composition of metalliferous umbers from the Late Cretaceous Japanese accretionary complex" in Geochemistry Geophysics Geosystem (2005). In addition, we published three papers concerning geochemistry of metalliferous umbers and associated greenstones in the Northern Chichibu Belt, central Shikoku, Japan and their depositional age in Resource Geology Special Issue entitled "Seafloor Processes and Related Mineralization in the Panthalassa : The Phanerozoic Records from the Japanese Accretionary Complexes - Part I".We have submitted the paper entitled "Umbers in the Tertiary accretionary complex of Japan : A recorder of Os isotopic composition of ancient seawater" to Geochimica et Cosmochimica Acta that is the top journal of Earth science research field. Further, we have submitted the paper entitled "Haematite formation by oxygenated ground-water more than 2.76 billion years ago" to Nature. This paper is concerning about Re-Os dating. In addition, we prepare another paper entitled "Marine Os isotope record during the Cretaceous : Evidence from metalliferous umbers in the Japanese and Omani accretionary complexes" to be submitted to Earth and Planetary Science Letters.