南秦岭混杂带中古洋隆体与碰撞造山作用

The project mainly studies origins, scale, attitude and contact zones of the ancient oceanic highs in the melange that is composed of the Xixiang, Sanhuashi and Donghe groups in the South Qinling with the thought and methods of tectonic facies. The sea mounts, an oceanic arc, a volcanic arc, fore-arc wedge and its basic magmatic diapers are distinguished. Late Paleozoic radiolarian fossils are also found in the muddy chert interlayers in the Sanhuashi Group after found in the Sunjiahe Formation of the Xixiang Group. The two groups were believed to be a Precambrian metamorphic complex. Through the determination of the production and collision ages of the highs, formation and collision processes of the ancient oceanic highs in the melange are described. Furthermore, the tectonic frame and geologic evolution of the South Qinling is revealed with the collision tectonics..

本项目以碰撞造山理论为指导，运用大地构造相研究思路和方法，在南秦岭西乡-石泉西乡骸⑷ㄊ汉投春尤撼雎兜厍氐阊芯孔槌苫煸哟墓叛舐√宓男灾省⒐婺！⒉醇跋嗷ソ哟ス叵担患鸷筒舛ü叛舐√逍纬珊拖嗷ヅ鲎驳氖贝骰煸哟纬傻墓毯褪毕藜肮叛笈璧墓乖煅莼唤沂九鲎苍焐降南晗腹蹋徊教教帜锨亓氲墓乖旄窬趾脱莼