查干凹陷构造样式及其构造演化
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摘要
查干凹陷所在的银根-额济纳旗盆地位于塔里木、哈萨克斯坦、西伯利亚和华北4大板块的结合部位,为了研究其复杂的构造特征,通过对全区地震资料进行解释,认为查干凹陷的构造样式可分为伸展构造、反转构造、走滑构造和复合构造4种;在此基础上,又细分为9种构造组合类型。运用平衡剖面法分析了查干凹陷构造与沉积演化,认为中生代白垩纪以来,研究区主要经历了裂陷、断-拗转换、拗陷和反转4个阶段。
The Yingen-Ejinaqi Basin that Chagan Depression located in is at the position cross over four plates(Tarim,Kazakhstan,Siberi- a,North China).Seismic data from Chagan area were interpreted to describe the complex structures of it.The structural styles of this area involve extensional structures,reversal structures,strike -slip structures and compound structures.Nine structural combi- nation types were divided further.Balanced section method was used for analyzing the structure and sedimentary evolution in Chagan Depression.It involves 4 stages since Cretaceous period: faulting stage,faulted depression stage,depression stage and shrinking stage in the studied area.
引文
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