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四川盆地紧邻龙门山冲断带,研究盆地西部新生代变形,对进一步认识和理解青藏高原隆升具有一定的科学意义。磁化率各向异性对地层应力状态变化非常灵敏。在雅安地区飞仙关镇附近选取9个采点进行岩石磁组构分析,探讨四川盆地西部岩石的构造变形特征。磁组构分析显示出样品具有沉积磁组构和初始变形磁组构特征。磁线理为NE-SW向,与区域褶皱轴方向一致,表明龙门山控制了四川盆地西部的构造变形,并且研究显示该变形发生在新生代。
The Sichuan Basin is close to the Longmen Shan thrust belt and studying the deformation of the Cenozoic in the western part of the basin is of scientific significance for further understanding and understanding of the uplift of the Qinghai-Tibet Plateau. Magnetic susceptibility anisotropy is very sensitive to changes in the formation stress state. In the vicinity of Feixianguan Town in Ya’an District, 9 mining points were selected to analyze the magnetic fabric of the rocks and to discuss the tectonic deformation characteristics of the rocks in western Sichuan Basin. The magnetic structure analysis shows that the samples have the characteristics of the deposited magnetic structure and the initial deformed magnetic structure. The magnetotelluric line is NE-SW direction, consistent with the direction of regional fold axes, indicating that Longmenshan controlled the tectonic deformation in the western Sichuan Basin, and the study shows that this deformation occurred in the Cenozoic.