柴达木盆地西南缘新近纪以来受昆仑山断裂活动影响，地震活动强烈，发育一系列与地震活动有关的软沉积物变形构造，主要包括：负荷构造、火焰构造、球—枕状构造、地震角砾、震裂缝、层内震褶曲和同沉积微断层等。通过区域地质调查、实测剖面、点上解剖和样品测试分析，初步认为柴达木盆地西南缘区分别于1．8—1．2，Ma、0．8，Ma、0．15，Ma 发生过3次强烈构造活动，这些事件均伴随强烈的古地震活动，作为这些隆升事件的沉积和构造响应，盆地更新统中形成了一系列典型软沉积物变形以及相关的震积构造，对于研究青藏高原板内不均匀隆升过程及其隆升构造—地震—沉积效应具有重要意义。%The southwestern margin of the Qaidam Basin was intensely affected by a series of faulting movement of the Neocene in the north of Kunlun Mountain,and developed serious soft sediment deforma-tion structure such as load structures, flame structures, ball-and-pillow structures, seismic breccias, ground fissure,vibrational liquefaction deformation structure and synsedimentary micro-fault faults.The regional geological survey,the measured sections and sample tests all analysis that there were three strong uplift of mountains in 1 .8 -1 .2 Ma,0.8 Ma and 0.1 5 Ma,these uplift events were accompanied by a strong ancient seismic activity.As the sedimentary and structural response in the uplift event,it formed a series of typical continental facies interplate seismites and the construction signs of seismites.It has a im-portant significance to research the interplate uneven uplift of the Qinghai-Tibet Plateau and relationship a-mong tectonic uplift,earthquake,deposition effects.
展开▼
