南秦岭泥盆纪:周缘前陆盆地和新生海洋盆地并列

SOUTH QINLING IN THE DEVONIAN:JUXTAPOSITION OF PERIPHERAL FORELAND BASINS AND NEW-BORN OCEANIC BASINS

南秦岭泥盆系形成的构造环境是研究秦岭造山带的学者们长期争议的一个焦点。通过形成大地构造环境、沉积特征的综合对比以及岩石地球化学特征的研究,认为南秦岭地区泥盆纪的盆地原型,大致以佛坪隆起为界,其东的东秦岭发育周缘前陆盆地,其西的西秦岭发育周缘前陆盆地(北带)和新生海洋盆地(南带),东秦岭与扬子连接部位(高川)发育一个新生的坳拉槽,这些盆地在空间上并列。

The formative tectonic environment of the South Qinling in the Devonian has been a focal item in a long time. By study of tectonic background, comprehensive comparison of the sedimentary and geochemical characteristics, the prototype basins were recognized in the South Qinling. The Devonian prototype basins included the peripheral foreland basins in East Qinling, the peripheral foreland basins （northern part） and new-born oceanic basins （southern part） in West Qinling and, at the same time, a new born aulacogen was developed in between the East Qinling and the Yangtze plate （Gaochuan）, which was divided by the Foping uplift. All the above basins were juxtaposed in space.