基于GMS软件的海砂矿体三维地质建模和资源量估算  

Three-Dimensional Geological Modeling and Resource Estimation of the Marine Sand and Gravel Orebodies Based on GMS

作　　者：习龙 倪玉根[1] 何健[1] 梁开[1] 陈科衡 夏真[1] 陈梅 薛峭[1] XI Long;NI Yugen;HE Jian;LIANG Kai;CHEN Keheng;XIA Zhen;CHEN Mei;XUE Qiao(Guangzhou Marine Geological Survey,China Geological Survey,Guangzhou,Guangdong 510075;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou,Guangdong 511458)

机构地区：[1]中国地质调查局广州海洋地质调查局,广东广州510075 [2]南方海洋科学与工程广东省实验室(广州),广东广州511458

出　　处：《地质与勘探》2022年第2期429-441,共13页Geology and Exploration

基　　金：中国地质调查局项目“海南福建等近海重点区矿产资源调查”(编号:DD20201175);“华南地区自然资源动态监测与风险评估”(编号:DD20211394);南方海洋科学与工程广东省实验室(广州)人才团队引进重大项目“新型无隔水管闭路循环钻井技术研究”(编号:GML2019ZD0501);原广东省海洋与渔业厅海砂资源调查项目联合资助

摘　　要：本文以南海北部某海域海砂矿区为例,提出了基于GMS软件的海砂矿三维地质建模和资源量估算方法。以钻孔和综合物探数据为源数据,划定了矿区内V1和V2矿体的边界,基于GMS软件系统构建了数据库,综合利用钻孔、综合物探、剖面图和海底地形控制面等资料,建立了三维地质模型,有效实现了海砂矿体三维可视化和体积资源量的估算。三维地质模型法与传统地质块段法估算的海砂体积资源量相差0.769亿m^(3),差值率为2.13%。结果表明,海砂三维地质模型能更加精准地揭示地层结构、海砂矿体的空间展布和估算海砂体积资源量。因此,基于GMS建立的三维地质模型对于海砂矿体的立体显示和资源量估算具有重要的意义,有利于后期指导海砂资源科学开发。Taking a marine sand and gravel mining area in the northern South China Sea as an example,this work proposed a 3D geological modeling and resource estimation method of marine sand and gravel ore based on GMS.The boreholes and comprehensive geophysical data were used as the source data to delimit the boundary of V1 and V2 ore bodies in the mining area.Based on the GMS software system,a database was built,and the 3D geological model was established by comprehensively utilizing the borehole,comprehensive geophysical data,geological profiles and the seabed topography control plane,etc.As a result,the 3D visualization and the volume resource estimation of the marine sand and gravel orebodies were effectively realized.There is a difference of 0.769 billion m^(3) between the volume resource of marine sand and gravel estimated by 3D geological model method and traditional geological block method,and the difference rate is 2.13%.The results show that the 3D geological model of marine sand and gravel can reveal the stratigraphic structure,the spatial distribution of marine sand and gravel orebodies and estimate the volume resource of marine sand and gravel more accurately.Therefore,the 3D geological model based on GMS is of great significance for the three-dimensional display of marine sand and gravel orebodies and the estimation of marine sand and gravel resources,and is conducive to guiding the scientific development of marine sand and gravel resources in the future.

关 键 词：GMS软件 三维地质模型 体积资源量 海砂 南海北部 

分 类 号：P67[天文地球—海洋地质]