三亚红塘湾地区陆海一体地质结构研究  

Study on the geological structure of land-marine integration in Hongtang Bay of Sanya

作　　者：赵卫 王国槐 宫少军 梁昊 杨博[2] ZHAO Wei;WANG Guohuai;GONG Shaojun;LIANG Hao;YANG Bo(Tianjin Geology Research and Marine Geological Center,Tianjin 300170,China;Wuhan Geological Survey Center of China Geological Survey,Wuhan 430223,Hubei,China)

机构地区：[1]天津市地质研究和海洋地质中心,天津300170 [2]中国地质调查局武汉地质调查中心,湖北武汉430223

出　　处：《矿产勘查》2023年第7期1114-1123,共10页Mineral Exploration

基　　金：中国地质调查局项目“三亚重点地区自然资源综合地质调查海域综合物探与钻探”(2020011);天津市地质研究和海洋地质中心项目“珠江口地层特征指示的沉积环境研究”(ZX2023-C2)联合资助。

摘　　要：地质结构研究在工程选址、自然资源调查等方面具有重要的实践意义。三亚红塘湾地质研究起步较晚,地质结构的系统性综合研究存在不足。本文利用单道地震剖面以及多个陆域和海域钻孔资料,对三亚红塘湾海域重大工程区及邻区的地层分布特征进行研究,通过钻孔地层分析,将50 m以浅地层划分了5个沉积旋回,9个工程地质层。通过井震结合手段对典型地层剖面与钻孔地层进行对比,共划分了5个地震反射界面和4个沉积地层单元,分析了全新统烟墩组、中更新统北海组、下更新统秀英组、上新统望楼港组等主要地层单元界面的埋深特征以及地层单元的厚度分布情况,初步查明了红塘湾地区上新世以来陆海一体的地层格架,从而为该区古地理再造、地质演化历史的分析解释提供基础地质资料,为三亚新机场等重大工程建设提供地质专业支撑。The study of geological structure had important practical significance in project site selection and natural resource investigation.The geological research in the Hongtang Bay of Sanya started late,there were deficiencies in the systematic and comprehensive research of geological structure.Using single channel seismic technology and data from multiple land-based and seafloor drilling,this paper investigated the distribution and characteristics of the stratigraphy in the Hongtang Bay of Sanya and its periphery regions.The top fifty meters of sedimentary deposits were divided into five sedimentary cycles and nine engineering geological layers through borehole stratigraphic analysis.Using a combination of drilling and single channel seismic technology and comparing with drilling stratigraphy,five seismic reflection interfaces and four sedimentary strata units were identified in the typical stratigraphic profiles.The paper analyzed burial depth characteristics of the main stratigraphic units such as the Quaternary Yandun Formation,Neogene Beihai Formation,Paleogene Xiuying Formation,and the Pliocene Wanglougang Formation,as well as the thickness distribution of these units.Research on the overall geological framework of the land and sea in the Hongtang Bay area since the Neogene were finished,which provid‐ing fundamental geological data for the analysis and interpretation of paleogeography and geological evolutionary history of the area,and providing geological professional support for the construction of major projects such as the new Sanya airport.

关 键 词：三亚红塘湾 地层单元 陆海一体 地质结构 

分 类 号：P738[天文地球—海洋地质]