| 东海内陆架泥质体远端表层沉积物孢粉分布规律及其环境意义 |
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| 引用本文： | 袁忠鹏,胡刚,王永红,黄畅,贾仲佳,梁伟强,彭锦.东海内陆架泥质体远端表层沉积物孢粉分布规律及其环境意义[J].沉积学报,2021,39(3):610-620. |
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| 作者姓名： | 袁忠鹏 胡刚 王永红 黄畅 贾仲佳 梁伟强 彭锦 |
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| 作者单位： | 1.中国海洋大学海洋地球科学学院，山东 青岛 266100 |
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| 基金项目： | 国家自然科学基金41676052国家留学基金委项目201609370007中国地质调查项目DD20190236 |
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| 摘 要： | 东海内陆架泥质沉积区是全新世高海平面时期以来形成的重要地貌单元，其包含了高分辨率沉积环境与气候变化信息，对该地区现代沉积环境及其影响条件的分析，将有助于长时间尺度古记录识别与反演。孢粉是研究植被和气候环境的重要代用指标，通过对东海内陆架泥质沉积区远端海域150个表层沉积物样品的孢粉分析，揭示了孢粉特征的分布规律，并探讨了其影响因素和传播机制。结果显示:研究区内共鉴定出93个孢粉类型，其中木本植物花粉47个，草本植物花粉28个，蕨类植物孢子12个，藻类孢子6个。松属花粉含量占有绝对优势，其次为禾本科；研究区孢粉浓度呈现近岸浓度高，随着离岸距离的增加而降低的整体规律。进一步研究表明，各孢粉类型的分布和传播机制不同，主要是受邻岸植被和水流作用影响。松属花粉在近岸区域呈现高浓度分布，可能是受季风和水流强度的共同影响；栎属、草本植物花粉的传播都和洋流有关；蕨类孢子仅仅出现一个高值区，可能是海底地形和海流相互作用的结果。孢粉指示的现代沉积环境研究结果将有助于泥质区沉积记录识别与古环境重建。
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| 关 键 词： | 东海内陆架 泥质沉积区 环境重建 孢粉 |
| 收稿时间： | 2020-06-23 |
Pollen Distribution and its Environmental Interpretation for the Surficial Sediment in the Southern Mud Belt along the East China Sea Inner Shelf |
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| YUAN ZhongPeng,HU Gang,WANG YongHong,HUANG Chang,JIA ZhongJia,LIANG WeiQiang,PENG Jin.Pollen Distribution and its Environmental Interpretation for the Surficial Sediment in the Southern Mud Belt along the East China Sea Inner Shelf[J].Acta Sedimentologica Sinica,2021,39(3):610-620. |
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| Authors: | YUAN ZhongPeng HU Gang WANG YongHong HUANG Chang JIA ZhongJia LIANG WeiQiang PENG Jin |
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| Institution: | 1.College of Marine Geosciences, Ocean University of China, Qingdao, Shandong 266100, China2.Qingdao Institute of Marine Geology, China Geological Survey, Qingdao, Shandong 266071, China3.Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong 266071, China |
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| Abstract: | The mud belt is a unique geomorphological unit that originated along the East China Sea Inner Shelf during the Holocene high sea level， which contains abundant high resolution information of sedimentary environment and paleoclimate. Pollen analysis is an effective proxy from the mud belt for researching the modern environment and has contributed to reconstructing the paleoenvironment. Based on 150 surficial sediments acquired from the mud belt， the characteristics and distribution mechanism of pollen were analyzed， as well as its influence factors. The results indicate that there are 93 types of pollen， including 47 arboreal pollen， 28 terrestrial herbaceous pollen， 12 fern spores， and 6 alga spores. Pinus pollen is the predominant component in pollen concentration. The pollen concentration is distributed parallel to the coastline， showing a decreasing trend seaward. Furthermore， the pollen in the research area originated from the local area and is transported to the ocean by the rivers， such as the Changjiang River， Oujiang River， and Minjiang River. The distribution of pollen concentration is controlled by the sediment type， especially the mud type， and the local ocean currents. The results present the modern depositional environment and influence factors contributing to the reconstruction of the paleoenvironment for the mud belt within the Holocene. |
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