平衡剖面技术在盆地构造分析中的应用进展及存在的问题

Advances and problems in the application of balanced cross-section technique in structure studies of basins

平衡剖面技术是一种遵循几何守恒原则而建立的地质剖面正演与恢复方法,是构造演化定量分析的有效手段。介绍了平衡剖面技术的原理和平衡剖面的制作。论述了平衡剖面技术在反转构造和挤压区盐构造平衡、伸展断陷盆地亚分辨正断层预测等方面取得的进展,而对不同方向的叠加构造、含斜向滑动的构造以及含不均匀剥蚀的多期构造平衡与恢复目前则难以实现。由二维剖面平衡与复原走向三维平衡与复原,同时与计算机技术紧密结合,实现完整的三维地质可视化、平衡和恢复系统,是平衡剖面技术的发展趋势。

Balanced cross-section technique is a restoration method in geologic cross-section, which is based on geometric conservation principle and is an effective means for the quantitative a-nalysis of tectonic evolution. The principle of balanced cross -section technique and making up of the balanced cross-section are introduced. Balanced cross-section technique has made progress in the balance between reversal structures and salt structure in compression area, sub-resolution normal faults prediction in extensional downfaulted basins. However,it is difficult to balance and restore some structures, such as superposition structure in various directions, oblique slide structure and multiphase structure of nonuniform denudation. The balance and restoration will be from 2D to 3D combining with computer technique. The orientation for further development of balanced cross-section technique is to realize a whole visualization,balance and restoration system of 3D in geology.