黄河三角洲南部宁海—西双河叶瓣潮滩沉积物粒度特征与季节变化分析  

Grain size characteristics and seasonal variation of the Ninghai-Xishuanghe lobe tidal flat sediments in southern Yellow River Delta

作　　者：黄学勇 高茂生[2,3] 侯国华[2,3] 张戈[1] 党显璋 HUANG Xueyong;GAO Maosheng;HOU Guohua;ZHANG Ge;DANG Xianzhang(School of Geography Science, Liaoning Normal University, Dalian 116029, Liaoning, China;Key Laboratory of Coastal Wetland Biogeosciences, CGS, Qingdao 266071, Shandong, China;Qingdao Institute of Marine Geology, CGS, Qingdao 266071, Shandong, China)

机构地区：[1]辽宁师范大学地理科学学院,辽宁大连116029 [2]中国地质调查局湿地生物地质重点实验室,山东青岛266071 [3]中国地质调查局青岛海洋地质研究所,山东青岛266071

出　　处：《华东地质》2021年第2期229-238,共10页East China Geology

基　　金：国家自然科学基金“晚更新世以来莱州湾地下卤水成因及恢复性研究(编号:41977173)”;科技部基础性工作专项“我国典型潮间带沉积物质量本底调查及图集编研(编号:2014FY210600)”;国家重点研发专项“沿海地区海水入侵现状调查评价(编号:2016YFC0402801)”;中国地质调查局“渤海湾西部等重点海岸带综合地质调查(编号:DD20160144)”项目联合资助。

摘　　要：根据15个表层沉积物丰、枯季粒度数据,综合运用Pejrup粒度三角图、粒径-标准偏差曲线以及粒度参数分析法,对现代黄河三角洲南部宁海—西双河叶瓣潮滩丰、枯季沉积物粒度特征进行了分析。结果表明:沉积物粒度存在季节性变化,且空间分布不同。丰季由于降水量大,总体沉积环境相对稳定;枯季沉积环境相对动荡,受现代黄河影响明显。粒度参数相互关系显示,沉积物在形成前经历了较长时间的分选,物质来源多样性与潮滩动力关系不大,且丰季与枯季物质来源不同。对比丰季和枯季沉积环境函数值,发现丰季受潮汐余流影响较强,以浅海沉积为主;枯季在黄河及沿岸河流影响下,以河流(三角洲)沉积为主。According to the grain size data of 15 groups of surface sediment samples in wet and dry seasons,the methods of Pejrup grain size triangle,grain size-standard deviation curve and grain size parameter analysis are used to analyze the sedimentary characteristics of Ninghai-Xishuanhe lobe tidal flat in the south of modern Yellow River Delta in wet and dry seasons.The results indicate that the grain size of sediments change with season and the spatial distribution is different as well.Due to the large precipitation in wet season,the general sedimentary environment is stable,while the sedimentary environment in dry season is relatively turbulent,more obviously affected by the modern Yellow River.The correlation of grain size parameters shows that the sediments undergo long-time sorting before formation.The diversity of material sources has little to do with tidal flat dynamics,and the material sources are different in wet and dry seasons.By comparing the function values of sedimentary environment in wet and dry seasons,it is found that the wet season is strongly affected by tidal residual current,with neritic sediments dominated,while the dry season is dominated by fluvial(delta)deposits under the influence of Yellow River and nearby rivers.

关 键 词：宁海—西双河叶瓣 潮滩 粒度 丰、枯季节 黄河三角洲 

分 类 号：P736.4[天文地球—海洋地质]