U.S.-Japan Cooperative Research: Magnetite/Ilmenite Variation and other Topics Concerning Plutonic Rocks

该奖项将使圣地亚哥州立大学的R. Gordon Gastil博士能够与东京大学的清水正明博士和日本地质调查局的石原慎太郎博士合作。加斯蒂尔博士将访问日本的一些遗址，在那里，暴露的花岗岩已经被详细测绘和地球化学分析。这些岩层将与加利福尼亚半岛的岩层进行比较，以确定不对称程度和内部结构的重要性，以及磁铁矿/钛铁矿边界的意义。对比分析不同地理位置的花岗质岩石结构，有助于进一步解释俯冲构造环境下的岩浆发育，从而有助于揭示花岗质岩石主要类型的起源和演化。加斯蒂尔博士在绘制加利福尼亚半岛的大型带状岩体地图方面有着丰富的经验。石原博士被认为是花岗岩地体中磁铁矿/钛铁矿区分方面的世界权威，清水博士最近发表了可能是对单个岩体中这种区分最详细的研究。因此，研究将显著受益于研究人员的经验互补。

This award will enable Dr. R. Gordon Gastil of San Diego State University to collaborate with Dr. Masaaki Shimizu of the University of Tokyo and Dr. Shunso Ishihara of the Geological Survey of Japan. Dr. Gastil will visit sites in Japan where exposed granitic rocks have been subjected to detailed mapping and geochemical analysis. These rock formations will be compared with those of the California Peninsula as to the degree and significance of asymmetry and internal structure, and the meaning of the magnetite/ilmenite boundary. Comparative analyses of granitic rock structures from different geographic locations will further the interpretation of magma development in subducting tectonic environments, and thus help to unravel the origin and evolution of the major types of granitic rock. Dr. Gastil has extensive experience in mapping the large zoned plutons of the California Peninsula. Dr. Ishihara is considered the world authority on the magnetite/ilmenite distinction in granitic terranes, and Dr. Shimizu has recently published what is probably the most detailed study of this distinction within a single pluton. Thus, the research will benefit significantly from the complementary experience of the researchers.