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Masaaki Shimizu博士和日本地质调查局的Shunso Ishihara博士合作。加斯蒂尔博士将参观日本的一些地点，在那里，裸露的花岗岩已经进行了详细的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在不对称程度和重要性、内部结构以及磁铁矿/钛铁矿边界的意义上进行比较。对不同地理位置的花岗岩类岩石结构进行对比分析，将有助于进一步解释俯冲构造环境中的岩浆发育，从而有助于揭示花岗岩的主要类型的起源和演化。加斯蒂尔博士在绘制加州半岛的大片区域地图方面拥有丰富的经验。石原慎太郎被认为是花岗岩地体中磁铁矿/钛铁矿区别的世界权威，清水博士最近发表了可能是单一岩体中关于这一区别的最详细的研究。因此，这项研究将从研究人员的互补经验中受益匪浅。

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.