摘要
通过对羌塘盆地南北两侧构造带地质特征、构造演化历程及盆地内部中生代地层充填特征的分析,探讨了羌塘盆地中生代构造属性及地球动力学机制。研究表明:羌塘盆地经历了早、中三叠世前陆盆地,晚三叠世早、中期被动陆缘盆地,晚三叠世晚期—侏罗纪羌北前陆盆地和羌南陆被动陆缘裂陷—坳陷盆地及早白垩世前陆盆地等地质演化历程;盆地南北边界构造带复杂而有序的地球动力学环境和构造演化,决定了羌塘盆地中生代为一复杂的多旋回叠合盆地。
Based on analyses of geological features of tectonic belts both south and north sides of the Changtang Basin,tectonic evolution and Mesozoic strata infill characteristics in basin interior,discussed Mesozoic tectonic attribute and geodynamic mechanism.The study indicated that the basin has experienced geological evolution process of Early and Middle Triassic foreland basin,early and middle stage of Late Triassic passive marginal basin,late stage of Late Triassic to Jurassic northern Changtang foreland basin and southern Changtang passive marginal rifting-depressing basin and Early Cretaceous foreland basin.The complex and sequential geodynamic environments and tectonic evolution of the basin＇s south and north boundary tectonic belts have decided the basin as a complex multicyclic superimposed basin.
出处
《中国煤炭地质》
2010年第4期1-5,共5页
Coal Geology of China
基金
中国地质调查局国土资源大调查项目(200410100002
1212010534604)资助
