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对东海重、磁资料进行了各种转换处理,结合地震、地质资料,综合定性和定量解释的成果,对中国东海北北东向陆架西缘断裂带、陆架东缘断裂带和北西向桃花-粟国断裂带、渔山-久米断裂带进行了研究。指出中国东海北北东向和北西向断裂带中生代以来的活动经历了三个阶段,即印支-早燕山阶段的北北东向断裂带左旋平移、北西向断裂带碰撞、挤压,晚燕山-早喜山阶段北北东向断裂以“犁式正断层”方式活动,北西向断裂带左旋平移活动和晚喜山阶段北西向断裂的左旋平移活动。断裂活动表现出自西北向东南逐渐变新的特点。由于两组断裂带的活动。造成了东海盆地“东西分带”、“南北分块”的基本构造格局。三个阶段的活动方式分别与特提斯洋的俯冲、太平洋-库拉板块的北移,特提斯洋的封闭、印度板块的向北移动及太平洋板块运动方向的转变有关。
According to the results of seismic data, geological data, qualitative and quantitative interpretation, the East China Sea north-east-east shelf west margin fault, continental shelf east margin fault and northwesterly peach blossom- Suguo fault zone, Yushan - Kumei fault zone were studied. It is pointed out that the activities since the Mesozoic in the NEW and NWW have experienced three stages, that is, the Indosinian-Early Yanshanian stage has a north-north-east fault zone left-lateral migration, a northwest-west fault zone collision and compression, - The North-EW strike in the Early Himalayan Period is characterized by “plow-normal faulting”, left-lateral translation in the NW strike and left-lateral translation in the NW-trending fault in the Late Himalayan Period. The fault activity shows the characteristics of gradually changing from northwest to southeast. Due to the activity of two sets of fault zones. Resulting in the basic structural pattern of “east-west zoning” and “north-south division” in the East China Sea Basin. The three stages of activities are respectively related to the Tethyan subduction, the Pacific-Kula plate northward migration, the closure of the Tethys Ocean, the northward movement of the Indian plate and the Pacific plate movement.