黄学勇^1,2,,
张戈^1,,,
高茂生²,
侯国华²,
党显璋²,
刘晓¹
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, 青岛海洋地质研究所, 山东 青岛 266071

基金项目: 科技部基础性工作专项项目（批准号：2014FY210600）、国家重点研究发展计划项目（批准号：2016YFC0402801）和中国地质调查局地质调查项目（批准号：DD20189503和DD20160144）共同资助


详细信息

作者简介: 黄学勇, 男, 27岁, 硕士研究生, 自然地理专业, E-mail:huangxy_dy@wo.cn

通讯作者: 张戈, E-mail:zhangge_dl@163.com

中图分类号: P736.21

收稿日期:2019-03-02
修回日期:2019-06-22
刊出日期:2019-11-30

Sedimentary area division and regional granularity characteristics in south-western Laizhou Bay, Bohai Sea

Huang Xueyong^1,2,,
Zhang Ge^1,,,
Gao Maosheng²,
Hou Guohua²,
Dang Xianzhang²,
Liu Xiao¹
1. School of Geography, Liaoning Normal University, Dalian 116029, Liaoning
2. Key Laboratory of Coastal Wetland Biogeosciences, Ministry of Natural Resources, Qingdao Institute of Marine Geology, Qingdao 266071, Shandong


More Information

Corresponding author: Zhang Ge,E-mail:zhangge_dl@163.com

MSC: P736.21

--> Received Date: 02 March 2019
Revised Date: 22 June 2019
Publish Date: 30 November 2019


摘要
摘要:在充分结合前人研究成果的基础上，通过16个柱状样粒度数据对莱州湾西南部表层以下1~3 m厚度范围内积环境进行了研究。对比前人发表的该地区表层沉积物类型、沉积环境分类等资料，运用系统聚类分析方法，将莱州湾西南部划分为5个沉积区域。通过对莱州湾西南部沉积速率的数据进行系统概况，同时通过比对不同区域沉积厚度，结合岸线变化、河流年代和沉积相特征，对沉积速率缺失区域沉积年代进行了初步标定。研究结果表明：黄河是塑造莱州湾沉积环境的主要动力，由于黄河河口在历史时期内不断变动，沉积环境在沿岸短源河流和海水动力作用下，产生了区域差异。总体而言，受黄河影响程度由北向南减小。现代黄河口南侧主要形成于1976~1996年黄河入海时期，即使黄河1996年后改道向北，现代黄河对沉积环境塑造作用依然明显。废弃黄河水下三角洲沉积环境在不同外力作用改造下，在近岸和中部浅海区形成不同沉积环境。近岸广利河口北潮滩，广利河水系对沉积环境改造作用有限，仅限于表层以下有限范围，1934年以来的沉积厚度不足1 m，因此可以有效反应黄河废弃三角洲沉积物本底。中部浅海区受沿岸河流和海水动力综合影响，原有沉积环境发生变化，形成了新的沉积物质。小清河口及附近海域属于黄河水下三角洲和潍河-弥河水下三角洲过渡区域，主要受小清河入海泥沙影响，但沉积物中的细粒组分，与黄河关系密切。莱州湾南岸基本不受黄河影响，在沿岸一系列短源河流作用下，形成了多河流集群水下三角洲沉积环境，沉积物多是短时间快速沉积的粗颗粒物质。
关键词: 莱州湾/
黄河/
粒度/
聚类分析/
沉积环境

Abstract:Based on the previous research, this paper studied the internal environment of the 1~3 m thickness in the south-western part of Laizhou Bay through 16 core samples grain size components and parameters. Summarizing the previous research results on surface sediment types and sedimentary environment classification, this study used the system cluster analysis method to divide the south-western of Laizhou Bay into five sedimentary areas. After systematically summarizing the sedimentation rates in the southwestern of Laizhou Bay, the sedimentary ages in the study area were preliminarily divided by the combination of sediment thickness, shoreline variation and river channel change. The results show that the Yellow River is the main driving force for the formation of the sedimentary environment in Laizhou Bay. Due to the historical changes in the location of the Yellow River estuary, the sedimentary environment has regional differences under the action of coastal short-source rivers and sea water dynamics. In general, the impact of the Yellow River has gradually weakened from north to south. The side edge of modern yellow river estuary was mainly formed during the Yellow River 1976~1996 period. Even though the Yellow River was diverted to the north after 1996, the modern Yellow River has a significant effect on the sedimentary environment. The sedimentary environment of the abandoned Yellow River Subaqueous Delta is transformed into different sedimentary environments in the near-shore and shallow sea areas under different external force transformations. The influence of the Guangli River system in the tidal flat sedimentary environment is limited. The sediment thickness since 1934 is less than 1 m, so it can effectively reflect the Native sediment of the abandoned Yellow River subaqueous delta. The central shallow sea area is affected by the combined effects of coastal rivers and seawater dynamics, and the original sedimentary environment changes, forming new sedimentary materials. The Xiaoqing River estuary and its adjacent waters belong to the abandoned Yellow River subaqueous delta and the Weihe-Mihe River subaqueous delta transition area, which is mainly affected by the sedimentation of the Xiaoqing River into the sea, but the fine-grained components in the sediments are closely related to the Yellow River. The south bank of Laizhou Bay is basically unaffected by the Yellow River. Under the action of a series of short source rivers along the coast, the underwater delta sedimentary environment of multi-river clusters is formed. The sediments are mostly coarse particulate matter deposited rapidly in a short time.
Key words:the south-western Laizhou Bay/
Yellow River/
grain size/
system cluster analysis/
sedimentary environment



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