Evolution of Gondwana and its bearing on mantle dynamics : Comparative study on Proterozoic erogenic belts in southern Africa, India, and Antarctica.

研究期间（2001-2004年），项目负责人与多名科学家在印度、马达加斯加、斯里兰卡、越南、巴基斯坦、澳大利亚、南非、刚果民主共和国、纳米比亚、莫桑比克等地进行了地质实地考察。来自日本各研究机构的约20名科学家和来自各国的28名科学家参与了该项目。此外，约有15名来自大学的研究生参加了实地工作，作为其博士或硕士研究的一部分。本研究主要以元古代碰撞带为研究对象，研究变质岩的地质构造和变形特征。在野外工作中，我们收集了大量岩石样品，用于岩石学、地球化学和同位素研究。我们测定了这些岩石的sr和nd同位素组成，以确定变质岩和原岩的年龄。我们还应用CHIME和SHRIMP测年方法来了解冈瓦纳的进化史。岩石学研究评价了变质P-T条件，了解了上地幔和下大陆地壳的热通量。对冈瓦纳大陆合并和分散过程中地幔向下地壳的物质通量进行了广泛的地球化学分析。实地地质工作是与印度阿拉哈巴德大学、马达加斯加塔那那利佛大学、斯里兰卡地质调查局、越南地质调查局、南非地质调查局、纳米比亚地质调查局、巴基斯坦地质调查局等多个研究机构合作进行的。研究结果发表在2004年11月13-15日在日本高知大学举行的冈瓦纳虫进化与扩散国际研讨会上。出版物列表见下一页。

Geological filed works were conducted by the head investigator together with many scientists in several Gondwana fragments including India, Madagascar, Sri Lanka, Vietnam, Pakistan, Australia, South Africa, R.D.Congo, Namibia, Mozambique during the term (2001-2004) of this research program. About 20 scientists from various research institutes in Japan and 28 scientists from various countries were involved in this program. In addition, about 15 graduate students from universities participated in the field works as a part of their Ms or Ph.D. studies. In this research program, we focused mainly on Proterozoic collisional belts and examined geological structure and deformation features of metamorphic rocks.During field works, we collected wide ranges of rock samples for petrological, geochemical and isotopic studies. We determined Sr-and Nd-isotopic compositions of these rocks to identify metamorphic and protolith ages. We also applied CHIME and SHRIMP dating methods to understand evolution history of Gondwana. Petrological examinations were made to evaluate metamorphic P-T conditions and understand heat flux in upper mantle and lower continental crust. Extensive geochemical analyses were made to understand mass flux from mantle to lower crust during amalgamation and dispersal of Gondwana continent. The geological field works were carried out in mutual association with various research institutes including University of Allahabad, India, University of Antananarivo, Madagascar, Geological Survey of Sri Lanka, Geological Survey of Vietnam, Geological Survey of South Africa, Geological Survey of Namibia, Geological Survey of Pakistan. Research results were presented at the International Symposium on Gondwana Evolution and Dispersal held at Kochi University, Japan during Nov.13-15,2004. Publication list is given in the following page.