摘要
长白山火山区经历了漫长的地质演化,多期火山喷发,形成了复杂的地质构造,特别是新生代中期火山活动形成的大面积的玄武岩覆盖层遮盖了它古老的面貌.为了解该区地下详细信息,本文介绍了长白山地区地层及岩性,结合长白山地区布格重力异常和航空磁异常分析长白山地区重磁特性.本文还根据长白县某地区一条重力,磁法及CSAMT联合物探剖面资料,并结合当地地质资料对测区地质构造进行综合解释.得出测区玄武岩厚度在50-200m,由南向北逐渐变厚,并得出玄武岩盖层下地层分布,圈定了6处断裂构造和2处岩体侵入.
The volcanic area of the ChangbaiMountain has undergone long-lasting geological tectonics, muhiphase volcanic eruptions and thus complicated geological structure shaped. Especially the widespread basalt which was formed because of volcanismin the middle Cenozoic covered its ancient appearance. The characteristics of formation and rock in research area have been instructed in order to get the real distribution of underground. This paper analyzes the characteristics of gravity and magnetic anomaly contact with the Bouguer gravity and aeromagnetic anomaly. Therefore, we get the distribution features and formed order of fourteen faults. Geophysical joint profile information of gravity, magnetic and CSAMT in M region of Changbai country combined with existed logging information are utilize detailed underground information of this area. We get the thick of basalt in research area is 50- 200 meters and it changes thicker from south to north. In addition, we get the real distribution features of the formation covered by basalt and we frame 6 faults and 2 rock intrusions.
出处
《地球物理学进展》
CSCD
北大核心
2016年第5期1991-1997,共7页
Progress in Geophysics
基金
国家高技术研究发展计划(863计划)课题(2014AA06A613)资助
