论文部分内容阅读
我国东部沿海各省都有火山活动踪迹,伴随欧亚、太平洋两大板块相互作用而发生、发展的北东及北北东向为主导的滨太平洋断裂系统起着重要的控制作用。郯庐、嫩江-长冶、中蒙古弧形、东南沿海等深断裂及分支和次一级深断裂带,都是重要的火山分布区。近代火山活动始于早第三纪,上新世最强烈,延续至第四纪。岩石基本属碱性玄武岩及过碱质、亚
The volcanic activity traces all provinces in the eastern coast of our country. With the interaction of the two major plates in Eurasia and the Pacific Ocean, the development of the North Pacific and North-North East dominated the Pacific Rim Fracture System plays an important role. Tanlu, Nenjiang-Changye, the middle Mongolia arc, the southeast coast and other deep faults and branches and sub-level deep fault zones are important volcanic distribution areas. Modern volcanic activity began in the early Tertiary, the most intense Pliocene, extending to Quaternary. The basic rock is alkaline basalt and over alkaline, Asia