摘要
为调查广西北部湾北海海域石英砂潜力资源,在涠洲岛周边海域布置了物探单道地震剖面与钻孔。通过对单道地震数据的采集、处理和解译,结合钻孔资料,初步划分了调查区第四系的地层结构,同时对比不同海底地貌在地震剖面上表现出的反射特征,识别出潮流冲刷槽、浅海堆积平原石英砂有利富集区和埋藏古河道、基岩隆起不利富集区。通过对勘探线地质剖面图与单道地震剖面图对比研究,提出利用地震剖面反射特征界面识别钻孔之间地层变化,连接钻孔层位,有利于提高资源量估算的准确度。
To investigate the potential resources of quartz sand in the Beibu Gulf region of Guangxi,we deployed single-channel seismic profiles and boreholes in the waters surrounding Weizhou Island.Through the collection,processing,and interpretation of single-channel seismic data,in conjunction with borehole information,we preliminarily delineated the Quaternary stratigraphic structure in the study area.Additionally,we compared the reflection characteristics exhibited by different seabed morphologies in the seismic profiles,identifying zones favorable for the accumulation of quartz sand,such as tidal scours and shallow marine depositional plains,as well as unfavorable accumulation zones like buried paleochannels and uplifted bedrock.By conducting a comparative study of the geological profile maps from the exploration lines and the single-channel seismic profiles,we propose utilizing the reflection characteristics of the seismic profiles to identify stratigraphic variations between boreholes and to correlate borehole stratigraphy,thereby enhancing the accuracy of resource volume estimates.
作者
陆必宇
花育辉
苏庆
刘枝刚
LU Biyu;HUA Yuhui;SU Qing;LIU Zhigang(Guangxi Marine Geological Survey Institute,Beihai 536000,China)
出处
《物探化探计算技术》
2025年第4期607-613,共7页
Computing Techniques For Geophysical and Geochemical Exploration
基金
广西科技界智库重点课题(桂科协[2023]K-34)
广西壮族自治区自然资源厅项目(桂自然资函[2022]941号)。
关键词
单道地震
石英砂矿
北海海域
海底地貌
资源量估算
single-channel seismic
quartz sand deposit
Beihai sea area
seabed landforms
resource estimates
