西秦岭南亚带地质构造演化模式讨论

本文从活动论的观点出发,对构造复杂、成矿发育而著称的西秦岭南亚带,运用浅部与深部、地质与地球物理相结合的原则,进行了层次性、时序性的递进研究,地质事实表明:西秦岭南亚带在前寒武纪基底构造背景发展的基础上,受华北板块与杨子板块的制约影响,曾经历了拉张裂陷沉积、碰撞挤压隆起与造山后的不平衡抬升和拉张断块运动,直至后来的浅层逆冲推覆,鲜明的表现了西秦岭南亚带、开与合的历史演化进程。

DISCUSSION ON TECTONICS EVOLUTIONARY MODEL OF THE SOUTH SUBZONE IN THE WEST QINLING

From the mobilization point of view,the south subzone of the west Qinling where is comp lex structure and mineralization well,and writer studied to this area by geology and geophysics in shallow and deep and combined with succession of strata and chronogenesis. The result indicated that on the basis of Precambrian basement tectonics the south subzone of the west Qinling is in fluenced by Huabei plate and Yangtze plate and it has undergone pull-apart sedimentation, collision compressive doming and postkine-matic disequilibrium uplift and movement of pull-apart block and shallow thrusting napping which has happened afterwards. All of these shown evolutional progress of opening and closing in the area.