A Geological and Petrological Investigation on Microstructure of Rocks and on Its Formatin Processes

完成了能量色散型电子探针分析系统的研制。主要研究成果如下：(1)完成了九州HIGO变质带的变质带填图。描述了产于高变质带中的混合岩类，并对其主量元素和微量元素进行了分析。(2)利用电子探针对产于西班牙南部隆达橄榄岩中的石榴石周围的蓝宝石边缘进行了分析，并确定了跨越边缘的物质转移。(3)对日达卡变质带中的一个超镁铁质岩体进行了XRF分析，提出了上地幔部分熔融和熔体偏析的模型。(4)研究了澳大利亚拉克兰褶皱带中的混合岩和S型花岗岩类，揭示了深成大陆下地壳的熔体分离和分离结晶过程。(5)对爱美县高津山花岗岩类进行了研究，并对其组成矿物进行了能谱分析。花岗岩类具有两种不同的岩石学类型。(6)测量了熊本地区第四纪安山期熔岩流的气泡结构，描述了气泡在熔岩中随浮力上升的过程。(7)研究了喀拉津高岛橄榄玄武岩中的地壳包裹体的显微结构。同一捕虏体中存在两种不同化学成分的玻璃，并对其早期部分熔融的机理进行了探讨。

An energy dispersive-type electron microprobe analysis system was completed. Following are main achievements of the research projects : (1) metamorphic zonal mapping has been completed for the Higo metamorphic belt in Kyusyu. Migmatites that occur in high-metamorphic grade zones were described and analyzed for major and trace elements. (2) A kelyphite rim around garnet that occur in the Ronda peridotite, southern Spain, was analyzed by electron microprobe analyzer and material transfer across the rim was determined. (3) A ultramafic body in the Hidaka metamorphic belt was analyzed by XRF and a model was proposed for the partial melting and melt segregation processes in the upper mantle. (4) The migmatite and S-type granitoids from Lachlan Fold Belt, Australia were studied and the process of melt segregation and fractional crystallization in an anatectic continental lower crust were exa mined. (5) Granitoids from Takatsukiyama, Ehime Prefecture were studied and constituent minerals were analyzed by EDS. Two distinct petrographic types were characterized for granitoids. (6) Vesicular structure was measured for an Quarternary andesitic lava flow, in Kumamoto and the process of bubbles ascending in a molten lava by the bouyancy was formulated. (7) Microstructure of crustal xenoliths enclosed in olivine basalt, Takashima, Karatsu was studied. Two kinds of glass of distinct chemistry occur in a single xenolith and the mechanism of incipient partial melting was investigated.