摘要
天津作为城市地质调查的试点城市之一,在地质条件上具有其特殊性,属深覆盖地区,在深覆盖地区城市三维地质结构调查中,通过采用重、磁、电探测方法和不同的反演处理方法进行相互验证,综合解释,对查明地层主要界面的埋深、分布范围和厚度,断裂的平面展布状况和深部发育情况,隐伏岩体的分布状况等具有较好效果。通过Z14线剖面实例,介绍了重、磁、电综合分析解释方法的运用,可供类似地区的三维地质结构调查借鉴和参考。
Tianjin, as one of the pilot cities in urban geological survey, possesses specific geological conditions and deep overlying strata. During the urban three-dimensional geological structure survey, especially in the deep coverage areas, the method in which combined gravity-magnetic-electrical explanation and different inversions by mutual verification and combined explanation are adopted has proved to be very effective in detecting such phenomena as the depth, distribution and thickness of the main stratigraphic boundaries, the plane spread of the surface fractures and the deep-seated faults and the distribution of the concealed rock bodies. This paper deals with the application of combined gravity-magnetic-electrical explanation method exemplified by the cross section along Z14 line. This technique is of great reference value in the survey of three-dimensional geological structures in other cities.
出处
《物探与化探》
CAS
CSCD
2007年第5期444-450,共7页
Geophysical and Geochemical Exploration
关键词
三维地质结构
深覆盖区
重磁电综合解释
城市地质调查
天津
three-dimensional geological structure
deep coverage area
combined gravity-magnetic-electrical explanation method
urban geological survey
Tianjin
