Comparative studies on metamorphic history and tectonic subdivision in Southwest Japan and New Zealand

本项目研究期限已满三年，并按计划取得了一批成果。本文的研究内容如下：为了对变质历史和大地构造分区进行比较研究，我们在日本西南部和新西兰的几个增生杂岩上进行了野外调查和实验室工作。日本地质学会报道了许多结果，并在几个期刊上发表了1。最重要的成果之一是发表在《美国矿物学家》(2000)上的一篇论文，西村Y.与D.S.Coombs、C.Landis和T.Itaya合作，对新西兰南岛的Otago片岩和邻近的弱变质增生杂岩进行了地质调查。本文阐明了奥塔哥片岩及其邻近的弱变质增生杂岩的热结构和变质年龄的极性不仅相同，而且与索变质岩a…相似。更多及其邻近的弱变质增生杂岩，突出了俯冲(宫城式)造山作用的特点。Y.Nishimura和T.Itaya测量了新西兰北岛Waipapa岩石中重结晶斑晶云母的大量碳质物质数据和K-Ar年龄，并撰写了手稿。这项工作正在与布莱克教授讨论。来自琉球中弧的结果将被更全面地检查，并在不久的将来发表。T.Itaya测量了大量的K-Ar年龄，并在《日本地质学会杂志》(2000)和《贡多纳研究》(2002)上发表了关于仁格带、三巴川带变质岩以及海外变质岩的重要成果。Y.Isozaki在板块造山的基础上建立了日本岛屿新的地质发展，并在Kagaku(2000)中得到了很好的解释。他还在西澳大利亚州的太古宙岩石和南中国的P-T界线上进行了积极的研究，并在2002年的《化学地质》等杂志上发表了一些论文。Y.Nishimura和Y.Isozaki与四位合著者一起出版了Asakura Shoten的《基础地球科学》(2002)教科书。较少

This project has expired the term of our research for three years, and gotten much results according to plan. Abstracts of our research are as follows :For the purpose of comparative studies on metamorphic history and geotectonic subdivision, we have been engaged in field surveys and laboratory work on several accretionary complexes in Southwest Japan and New Zealand. Many results were reported at Geological Society of Japan and published in several journals.1. One of the most important results is a paper printed in American Mineralogist (2000), which Y. Nishimura had geologically surveyed the Otago Schists and adjacent weakly metamorphosed accretionary complex in South Island of New Zealand in cooperation with of D.S. Coombs, C. Landis and T. Itaya. This paper has clarified not only to be the same in the thermal structure and polarity of metamorphic ages for the Otago Schists and adjacent weakly metamorphosed accretionary complex, but also to be resemble to the Suo metamorphic rocks a … More nd adjacent weakly metamorphosed accretionary complex, and emphasized a character of subduction (Miyashiro) type orogeny. Y. Nishimura and T. Itaya have measured a lot of d _<002> data of carbonaceous material and K-Ar ages of recrystallized phengitic mica from the Waipapa rocks in North Island of New Zealand, and written a manuscript. This work is under discussion with Professor P.M. Black. Results from the Middle Ryukyu Arc will be examined more fully, and published in near future.2. T. Itaya has measured a lot of K-Ar ages, and published important results on metamorphic rocks of the Renge and Sanbagawa belts as well as of overseas in Journal of the Geological Society of Japan (2000) and Gondowana Research (2002).3. Y. Isozaki has established a new geological development of Japanese Islands based on the plate orogeny, and easily explained in Kagaku (2000). He has also positively examined in the Archean rocks of West Australia and a P-T boundary of South China, and published some papers in Chemical Geology (2002) and so on.5. Y. Nishimura and Y. Isozaki have published a textbook entitled Basic Geosciences (2002) from Asakura Shoten together with four coauthors. Less