吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (1): 74-84.doi: 10.13278/j.cnki.jjuese.20180098

• 大陆架科学钻探 • 上一篇    

南黄海3.50 Ma以来海陆环境演变的元素地球化学记录

梅西1,2, 张训华3, 刘健1,2, 王中波1,2, 郭兴伟1,2, 黄湘通4   

  1. 1. 中国地质调查局青岛海洋地质研究所, 山东 青岛 266071;
    2. 青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室, 山东 青岛 266071;
    3. 中国地质调查局南京地质调查中心, 南京 210016;
    4. 同济大学海洋地质国家重点实验室, 上海 200092
  • 收稿日期:2018-03-12 发布日期:2019-01-18
  • 通讯作者: 张训华(1961)男,研究员,博士生导师,主要从事海洋地质学方面的研究,E-mail:xunhuazh611102@sina.com E-mail:xunhuazh611102@sina.com
  • 作者简介:梅西(1981-),男,高级工程师,主要从事海洋地球化学方面的研究,E-mail:meixi12345@163.com
  • 基金资助:
    国家海洋地质专项(DD20160147);国家自然科学基金项目(41502175,41330964)

Elemental Geochemical Record of Land and Sea Environmental Evolution Since 3.50 Ma in South Yellow Sea

Mei Xi1,2, Zhang Xunhua3, Liu Jian1,2, Wang Zhongbo1,2, Guo Xingwei1,2, Huang Xiangtong4   

  1. 1. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, Shandong, China;
    2. Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266071, Shandong, China;
    3. Nanjing Center, China Geological Survey, Nanjing 210016, China;
    4. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
  • Received:2018-03-12 Published:2019-01-18
  • Supported by:
    Supported by National Marine Geology Special Project of China (DD20160147) and National Natural Science Foundation of China(41502175,41330964)

摘要: 通过对南黄海西部陆架CSDP-1孔晚上新世-第四纪地层中的地球化学元素S、Sr和Ba的测试,结合该钻孔已发表的岩性、磁性地层和微体古生物等资料,综合分析发现:CSDP-1孔元素S、Sr、Ba质量分数及比值Sr/Ba在不同沉积相中的分布变化特征与研究区海陆沉积环境的变化密切相关,体现了S和Sr/Ba值的亲海相特性。S元素的高值主要出现在海相沉积环境中,对应了本区3.50 Ma以来的海侵事件,可以指示本钻孔海陆环境。Sr/Ba值在U2沉积单元(1.66~0.83 Ma)的高值与海侵无关,认为主要是物质来源改变导致的沉积矿物组成发生变化所控制,而在U1沉积单元(0.83 Ma以来)Sr/Ba值能指示海陆环境的变化,表明0.83 Ma以来海侵成为Sr/Ba值的主控因素。

关键词: 地球化学元素, 海侵, 南黄海, 第四纪

Abstract: Through testing the geochemical elements S, Sr and Ba in the strata from the Late Pliocene to Quaternary in the Core CSDP-1 in the west shelf of South Yellow Sea, combined with the published lithological, magnetic stratigraphic and paleontological data, the authors found that the distribution and variation characteristics of these elements S, Sr, Ba and their ratio Sr/Ba in different sedimentary facies are closely related to the sedimentary environment changes in the study area, which reflects the pro-marine feature of S and Sr/Ba ratio. The high value of S element mainly occurs in marine sedimentary environment, corresponding to the transgressions since 3.50 Ma in this area, which indicates the sea and land environment of the core site. The high value of Sr/Ba ratio in U2 sedimentary unit (1.66-0.83 Ma) is not related to transgression, but is mainly controlled by the change of material source, which leads to the changes of the sedimentary mineral composition; while in the U1 sedimentary units (since 0.83 Ma),the Sr/Ba ratio indicates the change of the sea-land environment, showing that transgression has become the main control factor of the Sr/Ba ratio since 0.83 Ma.

Key words: geochemical elements, transgression, South Yellow Sea, Quaternary

中图分类号: 

  • P595
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