四川盆地重、磁场特征分析  

Analysis of Gravity and Magnetic Field Characteristics in Sichuan Basin

作　　者：赵双[1,2,3] 刘代虎 爨伊博[1,2,3] 罗爱强 韩燕峰 ZHAO Shuang;LIU Daihu;CUAN Yibo;LUO Aiqiang;HAN Yanfeng(No.3 Institute of Geological&Mineral Resources Survey of Henan Geological Bureau;Henan Natural Resources Science and Technology Innovation Center;Key Laboratory of Granite and Mineralization of Henan Province)

机构地区：[1]河南省地质矿产勘查开发局第三地质矿产调查院,河南省信阳市464000 [2]河南省自然资源科技创新中心 [3]河南省花岗岩与成矿作用重点实验室

出　　处：《现代矿业》2024年第10期20-25,共6页Modern Mining

摘　　要：四川盆地不仅是中国典型的沉积盆地,也是一个不同类型盆地叠加而成的叠合盆地。盆地地层发育齐全,地质结构构造明显,有丰富的煤炭、石油、天然气和固体矿产资源,是研究地质和进行物探的理想场所。通过对该盆地1∶100万重、磁异常数据进行延拓、导数等处理,研究盆地重、磁场特征,论证延拓、导数等在正演解释中的作用;应用径向对数功率谱法来计算莫霍面深度,推断盆地基底深度。然后通过地质、地球物理综合解释,圈定盆地的边界范围,为地质找矿等工作提供可靠的证据。结果表明,重、磁方法在推测地质体埋深与边界划分上行之有效。The Sichuan Basin is not only a typical sedimentary basin in China,but also a superimposed basin composed of different types of basins.The formation of the basin is well developed,the geological structure is obvious,and there are abundant coal,oil,natural gas and solid mineral resources.It is an ideal place for geological research and geophysical exploration.By processing the 1∶1 million gravity and magnetic anomaly data of the basin by continuation and derivative,the characteristics of gravity and magnetic fields in the basin are studied,and the role of continuation and derivative in forward interpretation is demonstrated.The radial logarithmic power spectrum method is used to calculate the Moho depth and infer the basement depth of the basin.Then,through comprehensive geological and geophysical interpretation,the boundary range of the basin is delineated to provide reliable evidence for geological prospecting.The results show that the gravity and magnetic methods are effective in predicting the buried depth and boundary division of geological bodies.

关 键 词：重磁场特征 莫霍面 延拓 边界范围 地球物理解释 

分 类 号：P631[天文地球—地质矿产勘探]