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引用本文:岳保静,刘金庆,刘健,廖晶,张军强. 渤海西缘YRD-1101孔晚更新世以来沉积物粒度特征及其环境变迁[J]. 中国地质, 2020, 47(3): 853-867.
YUE Baojing,LIU Jinqing,LIU Jian,LIAO Jing,ZHANG Junqiang. Grain size distribution of sediment of core YRD-1101 in the western margin of the modern Bohai Sea since the latest Pleistocene and its environmental change[J]. Geology in China, 2020, 47(3): 853-867(in Chinese with English abstract).
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渤海西缘YRD-1101孔晚更新世以来沉积物粒度特征及其环境变迁
岳保静1,2, 刘金庆3, 刘健1,2, 廖晶1,2, 张军强4
1.国土资源部油气资源和环境地质重点实验室, 青岛海洋地质研究所, 山东 青岛 266071;2.青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室, 山东 青岛 266071;3.山东科技大学地球科学与工程学院, 山东青岛 266590;4.临沂大学地质与古生物研研究所, 山东 临沂 276005
摘要:
对现代黄河三角洲地区YRD-1101孔上部岩心开展粒度分析,并结合AMS14C和光释光(OSL)年代学测试结果、沉积特征、微体古生物鉴定及周边钻孔对比,建立了MIS5期以来的地层框架,揭示出该地区主要经历了3个阶段的沉积环境演化过程:(1)晚更新世—早全新世河流与海相交替沉积,其中MIS5c阶段海侵水动力环境中等,MIS3期海侵水动力环境较弱,MIS2期河流沉积水动力较强;(2)全新世滨、浅海沉积环境,动力环境整体较强,相对比较稳定;(3)1855年至今形成的黄河三角洲沉积,水动力强度较弱到中等。海平面变化和构造沉降是影响研究区晚更新世以来沉积演化的主要因素,此外,黄河带来的大量泥沙对海侵强度也有显著影响。
关键词:  粒度  沉积环境  现代黄河三角洲  海洋地质调查工程  渤海
DOI:10.12029/gc20200321
分类号:P731.2
基金项目:国家自然科学基金(41330964,41406079,41406080,41606059,41706074)及青岛多要素城市地质调查(DD20189230)联合资助。
Grain size distribution of sediment of core YRD-1101 in the western margin of the modern Bohai Sea since the latest Pleistocene and its environmental change
YUE Baojing1,2, LIU Jinqing3, LIU Jian1,2, LIAO Jing1,2, ZHANG Junqiang4
1.Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, Shandong, China;2.Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, Shandong, China;3.College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;4.Institute of Geology and Paleontology of Linyi University, Linyi 276005, Shandong, China
Abstract:
Three stages of sedimentary environment evolution since MIS 5 were recognized based on the data of grain size analysis, AMS14C dating, OSL dating, sedimentary characteristics, benthic foraminifera and ostracoda identification in the upper part of core YRD-1101 drilled in the modern Yellow River Delta, and comparison with surrounding boreholes. Three stages of sedimentary evolution are identified. (1)Interactive deposition of rivers and marine facies were formed during the Late Pleistocene-Early Holocene. Among them, the transgressive sediments in the MIS5c phase were formed in a medium hydrodynamic conditions, the transgressive sediments in the MIS3 phase were formed in a weak hydrodynamic environment, and the river sediments in the MIS2 phase were formed in a strong hydrodynamic environment. (2) The nearshore and shallow sea deposits during the Holocene formed in a strong and stable environment. (3) Modern Yellow River Delta sediments deposited since 1855 A.D. were formed in weak to medium sedimentary dynamic environments. Sea-level changes and neotectonic subsidence have been the major factors controlling the sedimentary evolution on the western margin of the modern Bohai Sea since MIS 5. In addition, the sediments were transported to the study area from Yellow River, which had a significant influence on transgression intensity.
Key words:  grain size  sedimentary environment  modern Yellow River Delta  oceanic geological survey engineering  Bohai Sea