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在大区域研究上,重磁电资料具有独特的优势。本文通过对阿尔金周缘地区重磁电异常特征的分析,指出了阿尔金周缘地区的重磁场特征具有分区性,其中重力场划分阿尔金重力异常区、阿尔善异常区、柴达木—祈连山异常区及贺西东部异常区,磁力场划分阿尔金磁异常区、阿尔善磁异常区、祈连山异常区及柴达木异常区。这种分区性受古老地块或深大断裂控制,在不同地区的盆地具有不同的形成机制和表现形式,而这种差异特征均与阿尔金断裂的运动有关。由于阿尔金断裂走滑,在周缘地区形成以挤压走滑拉分盆地和由于地块旋转产生引张而形成断陷盆地。
In the research of large area, the data of heavy magnetic materials have unique advantages. Based on the analysis of heavy and magnetic anomalies in the peripheral region of Altyn, the paper points out that the heavy and magnetic fields in the peripheral region of Altyn are characteristic of zonation. Among them, the gravitational field divides the Altyn-Gana anomalous region, the Alsian anomalous region, the Qaidam- Mountain anomaly area and eastern Hexi anomaly area, the magnetic field divided the Algin magnetic anomaly area, Alsian magnetic anomaly area, Chi Hill anomalous area and the Qaidam anomaly area. This division is dominated by ancient blocks or deep faults and has different formation mechanisms and manifestations in basins in different regions, all of which are related to the movement of the Altyn Tagh fault. Due to the strike-slip of the Altyn Tagh fault, a strike-slip basin was formed in the peripheral area to squeeze the strike-slip sub-basin and generate tension due to the rotation of the block.