刘传联^1,,
金晓波¹,
苏翔²,
张洪瑞¹,
程众¹,
马瑞罡¹,
马晓旭¹
1. 同济大学海洋地质国家重点实验室, 上海 200092
2. 中国科学院边缘海与大洋地质重点实验室, 中国科学院南海海洋研究所, 广东 广州 510301

基金项目: 国家自然科学基金重大研究计划集成项目（批准号：91428310和91428309）资助


详细信息

作者简介: 刘传联, 男, 55岁, 教授, 海洋地质专业, E-mail:liucl@tongji.edu.cn

中图分类号: Q915.811, P534.63, P539.6

收稿日期:2018-03-02
修回日期:2018-04-01
刊出日期:2018-05-30

Application of calcareous nannofossils in the Quaternary chronostratigraphy

Liu Chuanlian^1,,
Jin Xiaobo¹,
Su Xiang²,
Zhang Hongrui¹,
Cheng Zhong¹,
Ma Ruigang¹,
Ma Xiaoxu¹
1. State Key Laboratory of Marine Geology, Tongji Uiniversity, Shanghai 200092
2. CAS Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, Guangdong


MSC: Q915.811, P534.63, P539.6

--> Received Date: 02 March 2018
Revised Date: 01 April 2018
Publish Date: 30 May 2018


摘要
摘要:钙质超微化石是海洋沉积中最重要的微体化石之一，一直是海相地层划分与对比、进行年代地层学研究的重要手段，在第四纪地层及其年代学研究中发挥着重要作用。第四纪钙质超微化石记录中共存在10个主要生物事件和10个次要生物事件，据此可划分为6个化石带和7个亚带。通过与有孔虫稳定氧同位素地层学与磁性地层学对比，可以获得每个钙质超微化石生物事件的绝对年龄，从而提高生物地层学的年代分辨率。除了生物事件外，钙质超微化石定量分析也可为年代地层学的建立提供依据，如全新世的Emiliania huxleyi高峰带和晚更新世中布容期的Gephyrocapsa caribbeanica高峰带，等等。钙质超微化石的稳定同位素与有孔虫稳定同位素一样，可用来进行地层划分与对比，还可以用于古海洋、古气候研究。
关键词: 钙质超微化石/
年代地层学/
第四纪

Abstract:As one kind of most important microfossils in marine sediments, calcareous nannofossils are very useful tool in the stratigraphy and chronology, especially in the Quaternary. The Quaternary calcareous nannofossils are mainly consist of Emiliania, Gephyrocapsa, Pseudoemiliania and Reticulofenestra. Other species include Braarudosphaera, Calcidiscus, Discoaster, Discosphaera, Florisphaera, Helicosphaera, Oolithotus, Pontosphaera, Rhabdosphaera, Syracosphaera, Umbellosphaera and Umbilicosphaera. There are ten major calcareous nannofossil bioevents and ten secondary bioevents in the Quaternary. Six nannofossil zones and seven subzones can be divided according to these bioevents. Compare with the oxygen isotope stratigraphy and magnetostratigrapgy, the age of each calcareous nannofossil event can be obtained. In spite of nannofossil events, the quantitative analysis of nannofossils are also very useful in the stratigraphy and chronology. For example, the Holocene Emiliania huxleyi Acme and the middle Brunhes Gephyrocapsa caribbeanica bloom event. The case study of oxygen and carbon isotope records of calcareous nannofossils for the past 1 Ma from the ODP Site 1143 in the southern South China Sea demonstrated that the δ¹⁸O values of calcareous nannofossils for the past 1 Ma vary systematically with those of planktonic and benthic foraminifera from the same site. These indicate that nannofossil oxygen isotope records could be a powerful tool to study the paleoceanography, paleoclimatology and stratigraphy.
Key words:calcareous nannofossils/
chronostratigraphy/
Quaternary



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