| 潘卫红.海南岛崖州湾宁远河河口区现代沉积特征[J].地质与勘探,2020,56(6):1278-1286 |
| 海南岛崖州湾宁远河河口区现代沉积特征 |
| Features of modern sediments in the estuarine area of the Ningyuan River Bay, Hainan Island |
| 投稿时间：2019-11-20 修订日期：2020-06-28 |
| DOI：10.12134/j.dzykt.2020.06.017 |
| 中文关键词: 沉积环境 现代沉积 水动力演化 河口区 宁远河 崖口湾 海南岛 |
| 英文关键词: sedimentary environment, modern sedimentation, hydrodynamic evolution, estuarine area, Ningyuan River, Yazhou Bay, Hainan Island |
| 基金项目:海南海岸带综合地质调查（编号：GZH201500208）、烃渗漏对植被影响的光谱学机理研究
（编号：41402293）和陆域天然气水合物资源综合调查（编号：DD20190102）联合资助 |
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| 中文摘要: |
| 崖州湾宁远河河口区位于海南岛南侧，是以陆源为主、沉积环境相对简单的小型河流入海沉积区。分别在宁远河中游、下游、河流两侧海岸带以及近岸300余米的滩坝处，采集了5根重力柱状样、55个底质沉积物样品，通过粒度分析和同位素测试，对研究区近代沉积物沉积环境、空间展布规律和水动力演化规律进行了详细探讨。结果发现，研究区主要以河流三角洲沉积为主，在空间上，根据沉积物粒度和分选将研究区划分为五类沉积环境分区；在时间上，近百年来不同地区的水动力变化有所区别，入海口附近区域水体动荡随时间变化频繁；而河道上游附近区域水体条件变化小，形成明显的沉积旋回。 |
| 英文摘要: |
| The Ningyuan River estuary area of Yazhou Bay is located on the south side of Hainan Island. It is a small sedimentary area where the river flows into the sea, with dominant land sources and a relatively simple sedimentary environment. Five gravity column-like and 55 base-material sediment samples were collected in the middle reaches and downstream of the Ningyuan River, coastal zones on both sides of the river, and beach dams of more than 300 meters near the shore. By particle size analysis and isotope tests, this work attempted to illuminate the sedimentary environment, spatial distribution law and hydrodynamic evolution of modern sediments in this area. Results show that the study area is mainly composed of river delta deposits. In space, it can be divided into five types of sedimentary environment zones according to sediment grain size and sorting. In time, hydrodynamic changes in different regions were variable in the past 150 years. The water body motion in the vicinity of the estuary changed frequently with time; while in the vicinity of the upper reaches of the river such change was little, forming a distinct sedimentary cycle. |
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