末次冰消期以来东海内陆架古环境演化

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末次冰消期以来东海内陆架古环境演化

徐方建

中国科学院海洋研究所海洋地质与环境重点实验室山东青岛 266071

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Paleoenvironmental Evolution in the Inner Shelf of the East China Sea Since the Last Deglaciation

XU Fangjian

Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao Shandong 266071

摘要

摘要: 通过对位于浙—闽沿岸泥质带的EC2005孔岩性、粒度以及AMS14C年代分析，探讨了研究区自末次冰消期以来的古沉积环境演化，认为是湖水或海水深度、气候变化等综合影响的结果。岩芯底部60.20～41.00 m（17.3～13.1 ka BP）为湖泊三角洲沉积序列，可划分为前三角洲—三角洲前缘—三角洲平原三个沉积亚相，物质来源主要是湖盆流域物质的输入。随着海平面的逐渐上升，海水自13.1 ka BP开始侵入研究区，形成了41.00 m的海相沉积地层，可划分为前滨—近滨—浅海三个沉积亚相，与海平面变化曲线具有良好的对应。自12.3 ka BP开始，研究区受到沿岸流影响，长江物质开始影响研究区，7.3 ka BP以来主要是来自长江的悬浮体在沿岸流作用下输送沉积而形成，稳定的泥质沉积物开始形成。全球性重要气候事件如新仙女木事件、8.2 ka冷事件在东海内陆架沉积物中也得到了良好揭示。
- 古环境 /
- 末次冰消期 /
- 粒度 /
- 东海内陆架 /
- EC2005孔
Abstract: Based upon analysis of lithology, grainsize and AMS14C dating for Core EC2005, located in the mud area off the ZhejiangFujian coast in the inner shelf of the East China Sea, the paleoenvironmental evolution can be ascertained. The hydrodynamic conditions and sedimentary environment changed greatly which could have been an integrated result of the varieties of lacustrine water depth, sealevel and climatic changes. From the bottom 60.20 m to 41.00 m (17.3～13.1 ka BP), a lacustrine delta developed, which can be divided into three facies: prodelta, delta front and delta plain. The delta sediments are deduced to mainly from the local drainage area. The sea water arrived at the study area at 13.1 ka BP and a 41 m thick sediment formed from then on, which can be divided into three facies: foreshore, nearshore and shallow sea. The facies evolution was well corresponding to the sea level changes, the hydrodynamic conditions changed greatly also during this period. From 12.3 ka BP, the study area was influenced by ZhejiangFujian Coastal Current (ZFCC), and Yangtzederived materials had been transported southward from that time. Since 7.3 ka BP, the sedimentary environment is dominated by the ZFCC, and the homogeneous mud sedimentation began to form. The worldwide climatic events such as the Younger Dryas episode and the 8.2 ka event were well recorded in the core.
- paleoenvironment /
- Last Deglaciation /
- grainsize /
- inner shelf of the East China Sea /
- Core EC2005

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[1]	白鑫, 查小春, 黄春长, 周亚利, 庞奖励, 张玉柱, 王娜, 韩宜欣. 若尔盖盆地玛曲段末次冰消期以来的沉积环境和地表过程研究 . 沉积学报, 2023, (): -. doi: 10.14027/j.issn.1000-0550.2023.110
[2]	刘晓杰, 季银利, 向荣, 张大海, 李先国. 东海内陆架岩心中木质素的沉积记录 . 沉积学报, 2022, 40(2): 525-533. doi: 10.14027/j.issn.1000-0550.2020.083
[3]	王明霄, 郑世雯, 范德江. 东海内陆架近两百年来有孔虫组合变化及原因 . 沉积学报, 2021, 39(4): 973-982. doi: 10.14027/j.issn.1000-0550.2020.108
[4]	张明宇, 常鑫, 胡利民, 毕乃双, 王厚杰, 刘喜停. 东海内陆架有机碳的源—汇过程及其沉积记录 . 沉积学报, 2021, 39(3): 593-609. doi: 10.14027/j.issn.1000-0550.2020.080
[5]	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 . 沉积学报, 2021, 39(3): 610-620. doi: 10.14027/j.issn.1000-0550.2020.113
[6]	张玉芬, 李长安, 赵举兴, 毛欣, 许应石, 魏传义, 李亚伟, 张岱. 江汉平原东北缘末次冰消期沉积物粒度特征及环境意义 . 沉积学报, 2021, 39(4): 983-994. doi: 10.14027/j.issn.1000-0550.2020.044
[7]	秦亚超, 孙荣涛, 王红, 田振兴, 徐扬, 温珍河. 南黄海西部日照海域海侵沉积地层及其古环境意义 . 沉积学报, 2020, 38(4): 790-809. doi: 10.14027/j.issn.1000-0550.2019.063
[8]	周建超, 吴敬禄, 曾海鳌. 新疆乌伦古湖沉积物粒度特征揭示的环境信息 . 沉积学报, 2017, 35(6): 1158-1165. doi: 10.14027/j.cnki.cjxb.2017.06.007
[9]	陈晓辉, 李日辉, 蓝先洪, 王燕. MIS3中期以来北黄海中部陆架古环境演化 . 沉积学报, 2016, 34(1): 102-110. doi: 10.14027/j.cnki.cjxb.2016.01.009
[10]	滕晓华, 张志高, 韩文霞, 方亚会, 叶程程. 塔里木盆地南缘黄土粒度特征及其环境意义 . 沉积学报, 2015, 33(5): 941-950. doi: 10.14027/j.cnki.cjxb.2015.05.010
[11]	李楠楠, 介冬梅, 阳金秀, 陈雪松, 陈玉洁, 胡楚天, 乔志和. 长白山西麓泥炭灰分粒度特征及其环境意义 . 沉积学报, 2014, 32(5): 873-883.
[12]	. 沉积相变迁对内陆湖泊沉积易溶盐作为古环境指标的影响——以西宁盆地为例 . 沉积学报, 2014, 32(1): 101-109.
[13]	. 乌梁素海湖泊沉积物粒度特征及其环境指示意义 . 沉积学报, 2013, 31(04): 646-652.
[14]	舒强. 苏北盆地浅钻沉积物磁化率与粒度记录的末次冰消期以来的环境变化 . 沉积学报, 2009, 27(1): 111-117.
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[20]	魏文寿. 沙漠表层粒度与水热变化的环境效应分析──以古尔班通古特沙漠为例 . 沉积学报, 1998, 16(1): 152-156.

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文章访问数: 2796
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末次冰消期以来东海内陆架古环境演化

中国科学院海洋研究所海洋地质与环境重点实验室山东青岛 266071

收稿日期: 1900-01-01

修回日期: 1900-01-01

刊出日期: 2009-02-10

关键词:

古环境 /

末次冰消期 /

粒度 /

东海内陆架 /

EC2005孔

摘要: 通过对位于浙—闽沿岸泥质带的EC2005孔岩性、粒度以及AMS14C年代分析，探讨了研究区自末次冰消期以来的古沉积环境演化，认为是湖水或海水深度、气候变化等综合影响的结果。岩芯底部60.20～41.00 m（17.3～13.1 ka BP）为湖泊三角洲沉积序列，可划分为前三角洲—三角洲前缘—三角洲平原三个沉积亚相，物质来源主要是湖盆流域物质的输入。随着海平面的逐渐上升，海水自13.1 ka BP开始侵入研究区，形成了41.00 m的海相沉积地层，可划分为前滨—近滨—浅海三个沉积亚相，与海平面变化曲线具有良好的对应。自12.3 ka BP开始，研究区受到沿岸流影响，长江物质开始影响研究区，7.3 ka BP以来主要是来自长江的悬浮体在沿岸流作用下输送沉积而形成，稳定的泥质沉积物开始形成。全球性重要气候事件如新仙女木事件、8.2 ka冷事件在东海内陆架沉积物中也得到了良好揭示。

Paleoenvironmental Evolution in the Inner Shelf of the East China Sea Since the Last Deglaciation

Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao Shandong 266071

Received Date: 1900-01-01

Rev Recd Date: 1900-01-01

Publish Date: 2009-02-10

Keywords:

Abstract: Based upon analysis of lithology, grainsize and AMS14C dating for Core EC2005, located in the mud area off the ZhejiangFujian coast in the inner shelf of the East China Sea, the paleoenvironmental evolution can be ascertained. The hydrodynamic conditions and sedimentary environment changed greatly which could have been an integrated result of the varieties of lacustrine water depth, sealevel and climatic changes. From the bottom 60.20 m to 41.00 m (17.3～13.1 ka BP), a lacustrine delta developed, which can be divided into three facies: prodelta, delta front and delta plain. The delta sediments are deduced to mainly from the local drainage area. The sea water arrived at the study area at 13.1 ka BP and a 41 m thick sediment formed from then on, which can be divided into three facies: foreshore, nearshore and shallow sea. The facies evolution was well corresponding to the sea level changes, the hydrodynamic conditions changed greatly also during this period. From 12.3 ka BP, the study area was influenced by ZhejiangFujian Coastal Current (ZFCC), and Yangtzederived materials had been transported southward from that time. Since 7.3 ka BP, the sedimentary environment is dominated by the ZFCC, and the homogeneous mud sedimentation began to form. The worldwide climatic events such as the Younger Dryas episode and the 8.2 ka event were well recorded in the core.

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末次冰消期以来东海内陆架古环境演化

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Paleoenvironmental Evolution in the Inner Shelf of the East China Sea Since the Last Deglaciation

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末次冰消期以来东海内陆架古环境演化

中国科学院海洋研究所海洋地质与环境重点实验室山东青岛 266071

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Paleoenvironmental Evolution in the Inner Shelf of the East China Sea Since the Last Deglaciation

Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao Shandong 266071

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Paleoenvironmental Evolution in the Inner Shelf of the East China Sea Since the Last Deglaciation

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末次冰消期以来东海内陆架古环境演化

中国科学院海洋研究所 海洋地质与环境重点实验室 山东青岛 266071

English Abstract

Paleoenvironmental Evolution in the Inner Shelf of the East China Sea Since the Last Deglaciation

Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao Shandong 266071

全文HTML

目录

友情链接

期刊在线

联系我们

中国科学院海洋研究所海洋地质与环境重点实验室山东青岛 266071