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

1）基于Schreinemakers捆绑包改进了成岩网格制作计算机程序，可以在DOS-V机器上自动绘制多于（C 4）相的系统中的网格，因为以前的计算机程序在多于（C 4）相的系统中绘制网格存在缺点。我们将新程序编入并开放(Yoshida and Hirajima, 1999)。2)改进了以cmsize晶体为主的宏观织构的观察方法，而该观察方法尚未建立。为此，引入了新改进的数字扫描仪系统。该系统可以提高对大晶体的宏观观察。3）结合基于Schreinemakers方法新建的软件对变质岩的PTH路径进行研究，该软件基于综合热力学数据库和宏观结构观测系统。a）基于三八川片岩的岩石学研究确定滑石-多硅白云母组合稳定场的岩石成因网格（Izadyar等，2000）。b）区域尺度的识别苏鲁超高压带的等温减压路径（出版物；Nakamura ＆ Hirajima，2000 年；Banno 等人，2000 年：口头报告；Hirajima 等人，2000 年，西太平洋地球物理会议，东京） c) 使用包裹体组合和成岩模型网格精确确定意大利超高压岩石的前进路径（Compagnoni ＆平岛，正在出版）。

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).