40 Ar/39 Ar Geochronological Research in the Sambagawa and Adjacent Terranes, Japan: Analytical Expenses

这笔资金将用于在日本四国岛和本州岛的经典三巴川高压地层和邻近的岩石构造单元中进行40Ar/39Ar地质年代学研究项目的分析实验室费用。该项目的差旅费和所有后勤费用由美国国家科学基金会授予R.D. Dallmeyer （$12,154: INT-8815932）和日本科学促进会授予A. Takasu（岛根大学）。被提议的日本合作者（A. Taksu和T. Hirajima）已经对三巴川及其邻近带的热演化进行了10多年的研究。美国合作者R.D. Dallmeyer在主要造山带的复杂多变质地体中使用了40Ar/39Ar测年方法。本研究的具体目标是对三巴川地体及其邻近地区的时间-温度-压力演化史进行校正，并将结果与各种构造模式进行协调。预期的结果不仅对日本列岛，而且对全世界所有年龄的高压俯冲杂岩都具有重要意义。

Funds will defray the analytical laboratory costs involved in a 40Ar/39Ar geochronological research program in the classic Sambagawa high-pressure terrane and adjacent lithotectonic units exposed on the islands of Shikoku and Honshu, Japan. Travel and all logistical expenses of the project are covered by grants awarded to R.D. Dallmeyer from the U.S. National Science Foundation ($12,154: INT-8815932) and to A. Takasu (Shimane University) from the Japan Society for the Promotion of Science. The proposed Japanese collaborators (A. Taksu and T. Hirajima) have been investigating the thermal evolution of the Sambagawa and adjacent belts for over 10 years. The U.S. collaborator (R.D. Dallmeyer) has been utilizing the 40Ar/39Ar dating method in complex polymetamorphic terranes in major orogenic belts. The specific goals of the proposed research are to calibrate the time-temperature-pressure evolutionary histories of the Sambagawa terrane and adjacent areas and to coordinate the results with various proposed tectonic modes. The expected results will be of importance not only to the Japanese archipelago, but to high- pressure subduction complexes of all ages throughout the world.