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

岩石微观结构及其形成过程的地质和岩石学研究

基本信息

批准号：
62430013
负责人：
OBATA Masaaki
金额：
$ 17.98万
依托单位：
Kumamoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1990
项目状态：
已结题

项目摘要

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.

完成了能散型电子探针分析系统。主要成果如下：（1）完成了九州比吾变质带的变质分带填图。对高变质等级带中的混合岩进行了描述和主量元素和微量元素分析。(2)一个Kelyphite边缘周围的石榴石发生在隆达橄榄岩，西班牙南部，进行了分析，通过电子探针分析仪和材料转移的边缘确定。(3)利用X射线荧光分析技术对日高变质带中的超镁铁质岩体进行了分析，提出了上地幔部分熔融和熔融分凝过程的模式。(4)对澳大利亚拉克伦褶皱带的混合岩和S型花岗岩进行了研究，探讨了深熔大陆下地壳的熔体分凝和分离结晶过程。(5)对爱媛县高筑山的花岗岩类进行了研究，并用EDS分析了花岗岩类的组成矿物。花岗岩类有两种不同的岩石学类型。(6)在熊本测量了第四纪安山质熔岩流的气泡结构，并对气泡在熔融熔岩中因浮力而上升的过程进行了公式化。(7)研究了加拉津高岛橄榄玄武岩中壳源包体的显微结构。两种不同的化学玻璃发生在一个单一的捕虏体和初始部分熔融的机制进行了研究。