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通过对柴达木盆地西部阿尔金山前的地质、钻井和地球物理资料,研究并厘定了位于中新统内部上、下油砂山组之间的角度不整合.在对该不整合面的分布、上下地层的接触关系以及与之相关的古构造带特征研究的基础上,提出柴达木盆地西部靠近阿尔金山南麓这一角度不整合的发育与阿尔金断裂的活动有着密切的关联,认为正是在这一时段内阿尔金断裂带开始了区域性的隆升向着快速的走滑运动的转换,从而导致阿尔金山地区区域性古隆起带隆升作用的停止和中新统上油砂山组在柴西地区大范围超覆在早期不同时代的层序之上.
By analyzing the geological, drilling and geophysical data in front of the Altun Mountains in western Qaidam Basin, the angle unconformity between the upper and lower Youshaoshan formations in the interior of the Miocene is studied and determined.In the distribution of this unconformity, Based on the study of the contact relationship between the upper and lower strata and the related features of the ancient tectonic belts, it is proposed that the development of the unconformity in the west of the Qaidam basin near the southern foot of the Altun Mountains is closely related to the activity of the Altyn Tagh fault. It is during this period that the Altyn Tagh fault started a regional uplift to a rapid strike-slip movement, resulting in the cease of the uplift of the regional paleo-uplift in the Altun Mountains and the end of the Miocene The extensive coverage of the western Qaidam region was above the sequence of different early ages.