塔里木盆地草湖凹陷古生界上泥盆统底和三叠系底构造不整合面剥蚀量估算

 草湖凹陷古生代可以划分为震旦纪—中泥盆世与晚泥盆世—二叠纪两大构造旋回。本文采用“地层结构外延法”“剥蚀量变化率法”近似估算了草湖凹陷古生界T₆⁰（上泥盆统底）、T₅⁰ (三叠系底)构造不整合面剥蚀量。草湖凹陷T₆⁰剥蚀量为1000～2500m以上，总体上自南向北逐渐增大，草湖凹陷西北地区和东部鼻状隆起核部剥蚀幅度最大，剥蚀量大于2500m；T₅⁰剥蚀量为100～1000m，自西向东逐渐增加，剥蚀量高值区位于草湖凹陷东部。

Evaluation of denudation of structural unconformable surface for Paleozoic upper Devonian bottom and Permian bottom in Caohu depression of Tarim basin

The Permian of Caohu depression can be divided into two tectonic cycles: Sinian-Middle Devonian and Latter Devonian-Permian. The paper adopted formation-structural extrapolation approach and denudation variation rate approach to approximately evaluate the denudation of structural unconformable surface for T60 (upper Devonian bottom) and T50 (permian bottom) in Caohu depression. The T60 denudation of Caohu depression was above 1000~2500m, which was gradually increased from south to north in general and reached to the most in the northwestern part and the kernel part of east nose uplift in Caohu depression greater than 2500m; The T50 denudation was about 100~1000m, which was gradually increased from west to east and the high-value zone of denudation was located in eastern part of Caohu depression.