Study on movement pictures of tectonic collage based on microtexture analysis of rocks and minerals

本研究以JEM-2000 ES显微镜和透射电镜下岩石矿物显微结构分析及其组成变质带的P-T-t-D轨迹分析为基础，以电子探针分析变质矿物化学成分和放射性年龄分析为依据，重点研究了日本构造拼贴的运动轨迹。所研究的变质带有希达带、三郡带、良屋带、三钵川带、阿武熊带和日高带。特别是在Sambagawa带、Ryoke带、希达带和日高带的研究进展值得注意。本文分析了希达带宇月亚带的构造史、岩浆史、岩浆岩时代及与岩浆活动有关的变形样式。阐明了在希达带推覆体形成过程中，侏罗系花岗质岩石侵入到一个巨大的断裂带中。在Ryoke地带， ...更多信息 分析了辽辽老花岗质岩石的糜棱岩化运动图象及其变形方式，特别是石英和长石的变形方式。指出超糜棱岩的成因是斜长石和钾长石的微破裂作用和破裂物质的重结晶作用。分析了日高带的构造史、岩浆史、与岩浆活动有关的岩石运动图像和变形方式。结果表明，成岩侵入体产于断裂带，第一期岩浆来源于俯冲海脊（可能是库拉-太平洋海脊），第二期岩浆为钙碱性岩浆。详细分析了桑巴川带的地质构造、最高温期的热结构、构造变质作用、各变形期的运动图像以及各变形期岩石和矿物的变形样式，阐明了P-T-t-D轨迹，所得结果对认识高-中-低构造带的隆升过程具有重要意义。压力型变质岩少

Study on movement victbres of Japanese tectonic collage is focused in this research project on the basis of analysis of microtextures of rocks and minerals under microscope and transmission electron microscope(JEM- 2000ES) and P-T-t-D paths in its constituent metamorphic belt, which are based on analysis of chemical composition of metamordhic minerals by electron probe microanalyser and of radiometric ages. The studied metamorphic belts are Hida belt, Sangun belt, Ryoke belt, Sambagawa belt, Abukuma belt and Hidaka belt. Especially, the research progress in the Sambagawa belt, Ryoke belt, Hida belt and Hidaka belt appears to be noteworthy. In the Unazuki subbelt of the Hida belt have been analyzed the tectonic history, igneous history, ages of igneous rocks and deformation styles related to igneous activity. It has been clarified that the Jurassic granitic rocks intruded into a great fracture zone during the formation process of the nappe of the Hida belt. In the Ryoke belt have been a … More nalyzed movement picture of mylonitization of the Ryoke older granitic rocks and their deformation styles with special reference to deformation styles of quartz and feldspar. It has been pointed out that the origin of ultramylonites is ascribed to microfracturing of plagioclase and K-feldspar and to recrystallization of fractured materials. In the Hidaka belt have been analyzed the tectonic history, igneous history and movement pictures and deformation style of rocks related to the igneous activity. It has been clarified that the ianeous intrusions occurred in fractured zones and that the first stage magma was derived from a subducted ridge (probably Kula-Pacific ridge) and the second stage magma was of calc-alkaline type. In the Sambagawa belt have been in great details analyzed the geological structure, thermal structure of the highest-temperature phase, tectono-metamorphic processes, movement pictures of individual deformation phases and deformation styles of rocks and minerals during individual deformation phases, clarifying P-T-t-D path. The obtained results are considered to be considerablly available for understanding of the uplifting process of the high-pressure type metamorphic rocks. Less