【摘要】 贵州省在大地构造位置上属于羌塘—扬子—华南板块下的扬子陆块,受不同构造旋回期的发展演化控制,早期地质构造被掩盖,而研究深部构造有利于构造单元划分、成矿作用等研究.本文利用区域重磁资料,结合其他地质资料,利用优选向上延拓分离不同尺度重磁异常,并对不同尺度重磁异常进行归一化总水平导数垂向导数处理,提取线性构造信息,分析区内主要断裂构造特征,进行定性分析;根据分离出的大尺度重磁异常反演研究区莫霍面、居里面起伏特征,莫霍面起伏介于34～46 km之间,总体上具有西高东低的特征;居里面深度介于22～28.5 km之间,西部以坳陷区为主,东部以隆起区为主,以区内两条深大断裂为界,深部构造具有南北分带、东西分块的特征,反映出贵州省上扬子地块与江南造山带两个三级构造分区的深部构造特征差异.更多还原

【Abstract】 Guizhou locates in Yangtze block of Qiangtang-Yangtze-South China plates, and its early geological structure was concealed due to the development of different tectonic cycles, and the study of deep structure is conducive to the research of tectonic unit division and mineralization. Based on gravity and magnetic data, combing with other geology data, this paper utilizes preferential upward continuation to separate different-scale gravity and magnetic anomaly, and calculates the normalized vertical derivative of the total horizontal derivative of different-scale gravity and magnetic anomaly to extract linear structure information, then analyzes the main faults structure feature and develops qualitative analysis. Utilizing the separated large-scale anomaly to invert the depth of Moho and Curie, the result shows that the depth of Moho ranges from 34 km to 46 km with high value in the western and low value in the eastern; the depth of Curie ranges from 22 km to 28.5 km with depression areas in the western and uplift area in the eastern, and taking two deep faults as the boundary, the deep structure of Guizhou has the feature of zones distributed along north-south and blocks distributed along east-west, and also reflects the deep structure feature differences between the upper Yangtze Block and Jiangnanorogenic zone.更多还原