秦岭—大别造山带两侧中新生代构造变格与成盆作用

TECTONIC EVOLUTION AND BASIN FORMATION OF THE MESOZOIC AND CENOZOIC ON THE BOTH SIDES OF QINLING-DABIE OROGENIC BELT

摘要: 印支期以来,中国大陆在三面受挤的缩合构造环境下,经历了4期构造变格作用(T₃—J₂,J₃—K₁,K₂—E,E₃/N—Q),秦岭—大别两侧发育了相应的陆相盆地原型,并形成了复杂的原型并列叠加关系。在第一构造变格期,以发育压性陆内前陆盆地原型为主;在第二构造变格期,以发育压性陆内前陆盆地和走滑盆地原型为主;在第三构造变格期,以发育伸展断陷盆地原型为主;在第四构造变格期,以发育坳陷盆地原型为主。

Abstract: Since the Indosinian epoch,under a condensing tectonic environment compressed from3 sides,the Chinese continent has experienced 4 stages of tectonic evolution:T₃—J₂,J₃—K₁,K₂—E,and E₃/N-Q,resultingin corresponding basin prototypes along both sides of the Qinling-Dabie orogenic belt.The 1ststageis characterised by compressional intracontinental foreland basin prototype,the 2nd by compressionalintracontinental foreland and strike-slip basin prototype,the 3rd by extentional rift-subsidence basin proto-type,and the 4th by down-warped basin prototype.