三维构造恢复中原位归属问题的方法技术

Method and technique of normal position affiliation in 3D structural restoration

针对目前复杂构造三维恢复过程中地质体产生空间位置变化的不确定性,采用三维原位恢复方法,以巴楚断隆S1构造为例,通过对比S1构造恢复过程中所选取的标准区域与样本区域在构造变形前后的空间位置变化,分析构造变化过程中S1构造整体模型的位置变化规律;并据此将构造复原后的模型整体变化至初始位置,消除S1构造因去掉石炭系顶面断距带来西南方向的位移,也消除了因去掉石炭系褶皱所带来西南方向的位移。研究表明,运用三维原位恢复技术,能够确保地质模型在构造复原前后空间位置不变,进而保证研究主体在构造恢复过程中空间位置的相对稳定,为分析构造变形带来的影响奠定空间比较基础。

Aiming at the uncertainty of geological body spatial location change by three-dimensional（3D） recovery of complex structure,taken S1 structure in Bachu uplift as an example,3D in situ recovery method is adopted to contrast the spatial location change before and after the structure deformation in standard location and sample location during the process of S1 structure recovery.The authors analyze the location variation regularity of S1 structure during structure deformation,recover the model to its original location,and erase the southwestward displacements produced by eliminating the fault throw and the fold of Carboniferous.The research shows that 3D in situ recovery method ensures the invariant spatial location of geologic model before and after the structure recovery,then guarantee the spatial location stability of studied subject during the structure recovery,and build a spatial comparision foundation for analyzing the influences by structure deformation.