福建浅海潮流沙脊分布及形态特征  

Distribution and morphological characteristics of tidal sand ridges in shallow sea,Fujian,China

作　　者：贾磊 蔡鹏捷 万荣胜 习龙[1,2] 李佳伟 夏真 Jia Lei;Cai Pengjie;Wan Rongsheng;Xi Long;Li Jiawei;Xia Zhen(Key Laboratory of Marine Mineral Resources,Natural Resources Ministry,Guangzhou 510760,Guangdong,China;Guangzhou Marine Geological Survey,China Geological Survey,Guangzhou 510760,Guangdong,China)

机构地区：[1]自然资源部海底矿产资源重点实验室,广东广州510760 [2]中国地质调查局广州海洋地质调查局,广东广州510760

出　　处：《地质学刊》2020年第3期302-306,共5页Journal of Geology

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”(DD20201175);1∶25万海洋区域地质调查项目(GZH201200501,GZH201400207,GZH201400208,1212011220118)。

摘　　要：福建浅海海砂资源丰富,沿海岸线分布广且资源量大,主要以潮流沙脊为主。对潮流沙脊的形态和分布特征进行研究,有利于海砂资源的勘查开发以及对资源量进行合理评价。基于福建海域多波束全覆盖资料,利用ArcGIS的ArcMap对多波束资料进行配准和数据化,对区内潮流沙脊的形态特征进行初步分析。结果显示,福建浅海潮流沙脊形态上长宽分别在2.8~31.3、1.9~12.3 km之间,面积在3.7~200.9 km 2之间;分布上由北往南、自西向东,走向由东西向变为北东—南西向,沙脊发育规模逐渐增大且沙质变好,近岸以粉沙为主,远岸以沙为主。对比沙脊主体长与宽,将福建浅海潮流沙脊划分为A型(长度>10 km,宽度>5 km)、B型(长度>10 km,宽度<5 km)和C型(长度<5 km,宽度<5 km)3种类型。综合福建浅海潮流沙脊分布及形态特征,海砂资源勘查时可优选南部远岸区域。The shallow sea sand is widely distributed along the coastline and has a large amount of resources in Fujian,whose major type is tidal sand ridge.The research on the form and distribution characteristics of tidal sand ridges is beneficial to the exploration and development as well as the reasonable evaluation of resources,so as to ensure the development of marine economy.According to multi-beam full coverage data,the morphological characteristics of tidal sand ridges in Fujian shallow water are analyzed by the ArcMap.In this paper,tidal sand ridges in Fujian shallow sea show that the length and width of tidal sand ridges vary from 2.8 to 31.3 km and 1.9 to 12.3 km respectively,with an area ranging from 3.7 to 200.9 km 2.Their distribution direction is from north to south and from west to east.The trend of the shallow sea tidal sand ridge changes from east-west to north-west-south,with increasing development scale and improved sand quality.The nearshore bottom content is mainly silty sand,while the offshore bottom content is mainly sand.By comparing the length and width of the main body of the sand ridge,the tidal sand ridge in Fujian shallow sea can be divided into 3 types:Type A(length>10 km,width>5 km),Type B(length>10 km,width<5 km),Type C(length<5 km,width<5 km).According to the distribution and morphological characteristics of tidal sand ridges in the shallow sea of Fujian Province,the offshore area in the south can be prioritized in the exploration of sea sand resources.

关 键 词：浅海 海砂 潮流沙脊 分布与形态特征 福建 

分 类 号：P744.2[天文地球—海洋科学]