福建海坛岛海岸海滩—沙丘系统表层砂物质粒度特征及其环境意义  

The Surface Grain-size Characteristics and Environmental Significance of Beach-dune System in Haitan Island,Fujian Province

作　　者：张文静[1,2] 李志忠[1,2,3] 洪东铭 于晓莉[1,2] 苑秀全 赖海成 申健玲 

机构地区：[1]福建师范大学地理科学学院,福建福州350007 [2]湿润亚热带生态地理过程省部共建国家重点实验室,福建福州350007 [3]福建师范大学地理研究所,福建福州350007

出　　处：《杭州师范大学学报（自然科学版）》2016年第4期427-436,共10页Journal of Hangzhou Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(41271031);国家基础科学人才培养基金项目(J1210067);福建师范大学大学生创新创业训练计划项目(cxxl-2015129)

摘　　要：通过对福建海坛岛北部芦洋海岸海滩—沙丘系统3个典型剖面的表层砂样的粒度分析,探索海滩与海岸沙丘砂物质输移特征及其动力环境意义.结果表明:1)芦洋海岸横向沙丘表面粒度组成以细砂和中砂为主,平均值为1.76Ф;海滩砂的粒度组成以细砂、中砂和粗砂为主,平均值为1.82Ф,总体粒度特征为分选较好、正态分布和中等峰态.2)芦洋海滩砂样品主要是波浪作用的产物,虽然海岸沙丘砂部分样品具有一定的波浪作用特征,但显示风力搬运沉积为主的粒度特点.3)芦洋海滩—沙丘系统各个地貌部位表层砂样的粒度参数的空间变化较小,表明研究区波浪作用和风力作用的耦合影响且沉积环境比较稳定.Based on grain size analysis of three typical sand specimens on the surface of beach-dune system in Luyang Coastal, Haitan Island, Fujian Province, the study researched grain size characteristics of beach and coastal dune sand and their environmental significance. The results showed that fine sand and medium sand mainly composed grain size of transverse dune in Luyang Coastal, and its average was 1. 76 Ф, the composition of beach sands was mainly fine sand, medium sand and coarse sand, the average was 1. 82 Ф, in general, grain size was high sorting degree, symmetrical skewness and middle degree kuriosis. Luyang Coastal sands sample was mainly influenced by wave action, dune sand had the characteristics of wave action partly, but mainly displayed the granularity characteristic of wind carrying sediment. Beach- dune system in Luyang Coastal had basically identical grain size characteristics of sand specimen on surface in each topography position, its spatial variation of grain size parameter was small, which showed that research institute was mainly influenced by wave and wind action and their sedimentary environment was steady.

关 键 词：海滩—沙丘系统 粒度特征 动力环境 福建海坛岛 

分 类 号：P532[天文地球—古生物学与地层学]