| 上海及邻区重磁场的地震地质分析 |
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| 作者姓名： | 焦荣昌 |
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| 作者单位： | 地质矿产部第一海洋地质调查大队 |
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| 摘 要： | 本文是在完成上海及邻近地区海陆连片的地质和地球物理编图的基础上,对其中的重力和磁力异常图进行地震地质分析和解释,提取与地震活动有关的信息。指出中国南北两大陆块拼合的东部的深部界线位置。提出扬子准地台和华南褶皱系两大构造单元在上海一带的分界线部位。在阐述该区断裂特征和一般规律的基础上论述了一些活动断裂的存在。指出南黄海海域内的两条地震活动带和长江口外的一条隐伏地震活动带。为该区进行地震构造区划和制定抗震防灾措施提供基础资料和科学依据。
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| 关 键 词： | 重力异常 磁力异常 地震 地质 磁场 |
THE SEISMOGEOLOGY ANALYSIS BY MAGNETICGRAVITY DATA IN SHANGHAI AND NEIGHBOURING AREA |
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| Authors: | Jiao Rongchang |
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| Abstract: | Having completed the geologic-geophysical map in Shanghai and neighbouring area, including both land and sea area, we analysed and interpreted the magnetic and gravity data in this paper and then extracted information which was relative to earthquake activity. The location of deep collision boundary between South China Land Block and North China Land Block was pointed out, and so it was with joining line between two structure units of Yangtze platform and South China Fold Zone near Shanghai. Based on expounding fault characteristics and their general rules, we discussed existence of some active faults, and we also indicated the two earthquake active belts in South Yellow Sea and one potential earthquake active belt in the east to Yangtze River outfall. All these are usefal for sersmology structure zoning and taking precaution against earthquake hazards as scientific bases. |
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| Keywords: | Qravity anomaly magnetic anomaly seismic-geology |
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