海南省海洋地质调查主要进展与成果

在中央和地方的共同推动下,海南省海洋地质调查工作取得了长足的进步。为进一步提升海南省海洋地质工作效果,对近年来实施的海洋地质调查工作的主要进展进行了综述,其成果可分为4个方面,即海洋区域地质调查、海岸带与海湾地质环境综合调查与评价、海砂资源调查与评价和岛礁综合地质调查。其中: 1∶100万的海洋区域地质调查已实现了全覆盖,1∶25万的已开展3个图幅工作; 海岸带与海湾地质环境综合调查与评价工作已全面开展,基本查明了本岛沿岸20 m水深以浅的地质概况,重点岸段调查比例尺可达1∶5万,较系统地梳理了海岸带的地质资源与环境现状; 海砂资源调查与评价主要针对锆、钛砂矿和建筑用海砂开展,初步查明了海南岛周边陆架区沉积物类型和海砂潜力分布区,对成矿条件较好的海域开展了详细勘查,圈定了多个海砂开发矿产地; 岛礁综合地质调查工作主要查明了其基础地质条件和开发利用现状,对海岛的进一步开发和管理提出了建议,同时系统地开展了西沙群岛的海陆统筹地质调查工作,掌握了大比例尺的基础地质数据,并研究了其形成和演化过程,为三沙的海岛建设提供了依据。通过地质调查,获得了海南省基础海洋地质数据,查明了海洋资源和环境概况,为海南省的海洋经济发展提供了可靠的地质支撑。

Main progress and achievements of marine geological survey in Hainan Province

Hainan Province has made great progress in marine geological survey with the cooperation of the central and local governments. In order to further improve the effects of marine geological work in Hainan Province, the authors have reviewed the main progress of marine geological survey carried out in recent years, including four parts of marine geological survey, coastal zone survey, marine sand survey and island survey. 1∶1,000,000 scale marine geological survey has covered the whole South China Sea, and 3 sheets of 1∶250,000 marine geological survey have been carried out. The coastal zone and bay geological surveys have been carried out, and the general geological situation in less than 20 m depth coastal sea around Hainan Island has been identified. The survey scale of key coastal sections could reach 1∶50,000, and the geological resources and environmental conditions of the coastal zone have been systematically combed out. The investigation of marine sand resources mainly aims at zirconium-titanium sand ore and marine sand resources for construction, and the sediment types and distribution of marine sand potential in the shelf area around Hainan Island have been preliminarily identified. The areas with good deposit conditions have been investigated in detail, and a number of areas for development of marine sand resource have been found out. The offshore islands research mainly focused on the basic geological conditions, and based on current development and utilization status, some suggestions were put forward. A comprehensive land and sea geological survey of the Xisha Islands has been systematically carried out for the first time, a large number of basic geological data with a large scale have been obtained, and the formation and evolution process of these islands has been studied to provide reference for the island construction. Through geological work, plenty of basic marine geological data in Hainan Province have been obtained, and the marine resources and environment condition have been identified, which provides reliable geological support for the marine economic development of Hainan Province.