论文部分内容阅读
本文综合前人关于塔里木盆地地层划分的各种方案和最新研究成果，建立了塔里木盆地主要构造单元的地层年代格架，在此基础上恢复了塔中4井、满参1井、草1井残余地层的原始厚度，从而建立了这三口井时间序列剖面上的沉积速度直方图。通过对该时间剖面沉积速度直方图进行滑动平均处理，找到了100Ma的周期，这一周期控制了塔里木盆地的坳陷-隆起的构造旋回，即100Ma周期的半周期处于正相位时，盆地沉降坳陷接受沉积；而该周期的半周期处于负相位时，盆地隆起剥蚀。而且这一周期与塔里木盆地边缘造山带的开合演化史有着极好的对应关系。本文最后指出100Ma为控制塔里木盆地构造演化的最重要的周期，自寒武纪以来这一周期共有四个，并对其成因作了探讨。
Based on the various schemes and the latest research results of the stratigraphic division in the Tarim Basin, this paper established the stratigraphic chronostratigraphy of the main tectonic units in the Tarim Basin, and restored the Tazhong 4, Manchong 1 and Caochang 1 wells Residual thickness of the original strata, so as to establish a histogram of sedimentary velocity on time series of these three wells. By sliding averaging the sedimentary velocity histogram of the time profile, a period of 100Ma was found, which controlled the tectonic cycle of the depression-uplift in the Tarim Basin. That is, when the half-period of the 100Ma cycle is in the positive phase, the basin subsidence depression The subsidence is subject to sedimentation; when the half-period of the cycle is in negative phase, the basin uplift erodes. Moreover, this cycle has an excellent correspondence with the evolution history of the orogenic belt on the margin of the Tarim Basin. At the end of this article, we point out that 100Ma is the most important period for controlling the tectonic evolution in the Tarim Basin. Since the Cambrian period, there are altogether 4 in this cycle, and the reasons for this are discussed.