Exhumation path of metamorphic rocks and the development of the orogenic belt

1)改进了基于Schreinemakers束的成岩网格生成计算机程序，可以在DOS-V机上自动绘制（C+4）相以上系统的网格，因为以前的计算机程序在绘制（C+4）相以上系统的网格时存在缺点。我们编写了新的程序并将其打开（Yoshida and Hirajima，1999）。2）改进了以厘米级晶体为主的宏观织构的观测方法，这种织构的观测方法尚未建立。为此，引进了新改进的数字扫描仪系统。3）结合新开发的基于Schreinemakers方法的软件、基于综合热力学数据库的软件和宏观结构观测系统，对变质岩的PTH轨迹进行了研究。a）在对三坝川片岩（Izadyar等，B）苏鲁超高压带区域尺度等温减压路径的识别（出版物;中村& Hirajima，2000年; Banno等人，2000年：口头报告; Hirajima等人，c）使用包体组合和模型岩石成因网格精确确定意大利超高压岩石的俯冲路径（Compagnoni & Hirajima，出版中）。

1) Improvement of computer program for making petrogenetic grids based on Schreinemakers' bundle, which can draw grids automatically in the system with more than (C+4) phases for DOS-V machine, as the previous computer program has disadvantage for drawing the grid in the system with more than (C+4) phases. We corded the new program and opened it (Yoshida and Hirajima, 1999).2) Improvement of observation method for macroscopic textures mainly composed of cmsize crystal, of which observation method was not established. Newly improved digital scanner system was introduced for this purpose. This system can improve them acroscopic observation with large crystal.3) Investigation of PTH path of metamorphic rocks combining with newly constructed software based on Schreinemakers' method, the software based on comprehensive thermodynamic data base and macroscopic texture observation system.a) Petrogenetic grid defining the stability field of talc-phengite assemblage based on the petrological study of the Sanbagawa schists (Izadyar et al., 2000).b) Identification of the regional scale isothermal decompression path from the Su-Lu UHP belt (publication ; Nakamura ＆ Hirajima, 2000 ; Banno et al., 2000 : oral presentation ; Hirajima et al., 2000 at Western Pacific Geophysical Meeting, Tokyo) c) Precise determination of the prograde path of Italian UHP rocks using the inclusion assemblages and model petrogenetic grids (Compagnoni ＆ Hirajima, in press).