赣西北中部逆冲推覆构造的形成时间和形成模式

江西九岭地体南缘武功山地体北侧以及其间的萍乐盆地内，有大量的逆冲推覆构造分布。逆冲推覆构造的类型有两种──逆冲推覆型和重力滑覆型。逆冲推覆构造具有横向上对冲挤压，纵向上多层滑动的特征，据此笔者建立了一个可能的多层滑动──对冲挤压模式，并根据地质和同位素年龄资料讨论了逆冲推覆构造的演化历史，指出区内大规模逆冲推覆构造的形成时间为中生代晚期（119.6Ma）。

A DISCUSSION ON THE FORMING TIME AND FORMING MODEL OF THRUST AND NAPPE STRUCTURES IN THE CENTRAL PART OF NORTHWEST JIANGXI

A number of thrust and nappe structures are recognized along the southern margin of the Jiulingterrane and the northern margin of the Wugong terrane as well as in the Pingxiang-Leping Basin whichlies between the above two terranes. There are two types of thrust and nappe structures-thrusting andgravity sliding. The structures are characterized by opposite thrusting in the lateral direction and multidetachment in the vertical direction. Thereby the author has established a possible model of multi-detachment-opposite thrusting. In terms of the information about geology and isotope age, the authordiscusses the evolution history of the thrust and nappe structures and suggests that the forming time oflarge-scale thrust and nappe structures is Upper Mesozoic (119. 6 Ma).