唐古拉山侏罗系盖覆区空喀拉-温泉-澜沧江结合带鉴别标志

IDENTIFICATION INDICATORS OF KONGKALA-WUNQUAN-LANCANG RIVER SUTURE ZONE IN JURASSIC COVERING AREA IN TANGGULA MOUNTAINS

结合带局部地段被与结合带演化密切伴生的各类盆地盖覆是各造山带中的一种普遍现象 ,因而初步将盖覆结合带的盆地划分为二类 :一是以边缘前陆盆地为代表的盖覆结合带而不破坏结合带的纵向盖覆性盆地 ;二是以横推断层盆地为代表的盖覆且破坏结合带的横向破坏性盆地。区内海相侏罗纪盆地实为与空喀拉温泉澜沧江结合带演化密切相关的盖覆结合带的陆内俯冲型边缘前陆盆地。深部地球物理探测资料证实了结合带在盖覆层之下仍存在 ,更说明结合带两侧板块构造建造对比明显有异 ,分属两类不同性质的大陆边缘 ,进而得出了结合带在研究区内潜伏于盖覆层之下的结论 。

Its ordinary that parts of a suture zone is coverd with kinds of basins accompanying by its evolution in all orogenic belts. Premayily, these covering basins are divided into two kinds.One is longitudinal covering basins, overlapping but not destructuring the belt. Another is transversal destructive basins, not only covering but also destructuring the zone. Sysmetrical marine Jurassic basins is actually intracontinental subduction marginal foreland basins interrelated with the evolution of the Kongkala Wunquan Lancang River zone. Prospecting data probe that the belt is under the covering layers. plate tectonics formations in the two sides of the zone are different obviously and respectively belong to two kinds of continental margin. Thus it is concluded that the zone lies under the covering layers and presents three identification indicators of suture zone. [