广东省东海岛大岭剖面沉积物粒度、微形态特征与沉积环境  

Granularity,surface microtextural features and sedimentary environment of the Daling section in Donghai Island,Guangdong,China

作　　者：黄日辉 张立婷 冯淼彦 刘铮瑶 李健熙 陈韵琪 张志浩 王璟 Huang Rihui;Zhang Liting;Feng Miaoyan;Liu Zhengyao;Li Jianxi;Chen Yunqi;Zhang Zhihao;Wang Jing(School of Geographical Sciences,Lingnan Normal University,Zhanjiang 524048,Guangdong,China;Shaanxi Institute of Geo-Environment Monitoring,Shaanxi Institute of Geological Survey,Xi'an 710054,China)

机构地区：[1]岭南师范学院地理科学学院,广东湛江524048 [2]陕西省地质调查院陕西省地质环境监测总站/陕西省地质灾害中心,陕西西安710054

出　　处：《中国沙漠》2023年第2期121-129,共9页Journal of Desert Research

基　　金：国家自然科学基金项目(42102161);湛江市科技计划项目(2021E05023);国家级大学生创新创业训练计划项目(202110579006)。

摘　　要：沉积物粒度与表面微形态特征是反映沉积环境及源区等信息的重要指征。基于粒度分析和扫描电镜影像,研究广东省东海岛海岸大岭剖面的海岸风沙沉积物石英颗粒与微形态特征,以揭示其沉积环境和沉积过程。结果表明:(1)大岭剖面的粒度特征总体具有典型风成砂的特点。(2)大岭剖面沉积物石英颗粒磨圆度适中,表面具有麻点/麻面、碟形坑、新月形撞击坑、水下磨光面、鳞片状剥落等特征。东海岛大岭剖面石英颗粒先受到流水磨蚀与搬运作用,再受到风力的二次搬运和改造作用,风力作用特征显著。(3)大岭剖面整体上记录了从温暖湿润环境向寒冷干旱环境演变的历史。Sediment granularity and surface microtextural characteristics are important indicators that reflect the sedimentary environment and source area.Based on particle size analysis and scanning electron microscopy imaging,the granularity parameter and microtextural characteristics of coastal aeolian sediments in the Daling section of the coastal Donghai Island in Guangdong Province were studied to reveal their sedimentary environment and sedimentary processes.The results show that:(1)The granularity characteristics of Daling section are typical of eolian sand.(2)The quartz particles in Daling section have moderate roundness,and the surface is characterized by pockmarks/pits,dished pits,crescent-shaped impact pits,underwater polished surfaces,scaly peeling,etc.The quartz particles in Daling section are firstly abraded and transported by water,and then secondarily transported and reformed by wind.The characteristics of wind action are remarkable.(3)The Daling section records the evolution history from warm and humid environment to cold and arid environment.

关 键 词：东海岛 石英颗粒 粒度特征 表面微形态特征 

分 类 号：P931.3[天文地球—自然地理学]