论文部分内容阅读
冀中拗陷南部地区重力导数异常的地质效果,杨琦兰应用 PGM(CYBER1724计算机上数字重力资料处理系统)系统重新处理六十年代比例尺为1:100000的重力详查资料,发现重力高阶导数正异常与地质构造密切相关,它可能是潜山、构造和岩性变化的反映。现以孙虎地区为例,该区共有七个潜山构造,其中有六个潜山在重力高阶导数异常上都能较好的反映出来,符合率高达86％。符合率如此之高的原因有下列因素:其一是古潜山埋深较浅,一般只有2800—3200m;其
Geological effects of gravitational derivative anomaly in southern area of Jizhong depression Yang Qi-lan (Institute of Geophysical Prospecting, Institute of Geophysics, Chinese Academy of Sciences, Beijing 100083, China) The gravimetric data of 1: 100,000 in 1960s were reprocessed by PGM (CYBER1724 computer digital gravity data processing system) Closely related to the geological structure, it may be a reflection of the changes in buried hills, tectonics and lithology. Take the case of the Sunhu area for example. There are altogether seven buried hill structures in this area. Among them, six buried hills are better reflected in the high gravity derivative anomalies with a coincidence rate of up to 86%. The reason for such a high rate of coincidence has the following factors: First, the burial depth of buried hills is shallow, generally only 2800-3200m; its