下扬子地区前陆变形构造格局及其动力学机制

详细信息

刊出日期: 1999-02-15

TECTONIC PATTERN AND DYNAMIC MECHANISM OF THE FORELAND DEFORMATION IN THE LOWER YANGTZE REGION

Publish Date: 15 February 1999

摘要: 华北板块与扬子板块于印支—早燕山期发生陆—陆碰撞时，使造山带南部的下扬子地区成为前陆变形带。下扬子前陆变形带上，大致以长江为界，北部的逆冲推覆构造系统为向南运动，南部的逆冲推覆构造系统为向北运动，总体呈两套对冲的逆冲推覆构造系统。长江以北前陆变形的动力来自华北与扬子板块沿大别—胶南造山带的碰撞，长江以南前陆变形的动力来自沿江南隆起带的板内造山。
Abstract: Owing to the continent continent collision between the North China and Yangtze plates during the Indosinian early Yanshanian period, the Lower Yangtze region south of the collision belt developed into a foreland deformation belt. In this belt, the thrust nappe system north of the Yangtze River moved southward while the system south of Yangtze River moved northward, showing two thrust-nappe systems with opposite thrusting senses. The dynamic force for the foreland deformation north of the Yangtze River came from collision between the North China and Yangtze plates along the Dabieshan Jiaonan orogenic belt. The dynamics for the foreland deformation south of the Yangtze River was derived from the intraplate orogeny in the Jiangnan uplift.
- foreland deformation /
- thrust nappe structure /
- Lower Yangtze region