气候变化领域集成服务门户(CCPortal): Evolution of mid-Cretaceous radiolarians in response to oceanic anoxic events in the eastern Tethys (southern Tibet; China)

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DOI	10.1016/j.palaeo.2019.109369
	Evolution of mid-Cretaceous radiolarians in response to oceanic anoxic events in the eastern Tethys (southern Tibet; China)
	Wang T.; Li G.; Aitchison J.C.; Ding L.; Sheng J.
发表日期	2019
ISSN	0031-0182
卷号	536
英文摘要	Oceanic anoxic events (OAEs) are well-known from their widespread black shale and carbon isotopic excursions in the (western and eastern) Tethys and Atlantic Ocean. However, the weakest link in the studies of the OAEs is biological evolution. Sedimentological, biostratigraphical and geochemical data from Albian to Coniacian strata in southern Tibet recorded turnover events and fluctuations in diversity of the radiolarian fauna within the eastern Tethys during OAE 1d and OAE 2. Abundant radiolarian fossils were obtained from the Gyabula Formation, with 93 species from 43 genera identified and assigned to the mid to Upper Cretaceous Acaeniotyle umbilicata, Archaeospongoprunum tehamaensis, Crucella cachensis, Alievium superbum, and Dictyomitra formosa zones. The association of carbon isotopic excursions, black shale and radiolarian turnover indicates extensive changes in the ocean-climate system. Nutrients are made increasing available to the marine plankton through submarine volcanic activity and rising sea-level, which were a likely cause of radiolarian turnover at/or near the OAEs. Active submarine tectonism-volcanism leads to the expansion of the hypoxic zone and may cause many deeper dwelling forms to become extinct whereas most of the shallower dwelling radiolarians survive. Radiolarian evolution thus provides a useful record with which to seek understand relationships between climate, paleoceanographic processes and plankton evolution. © 2019
英文关键词	Biological evolution; Biostratigraphy; Black shale; OAEs; Turnover events
语种	英语
scopus关键词	Albian; anoxic conditions; biostratigraphy; black shale; Coniacian; fossil record; radiolaria; Tethys; turnover; underwater environment; Atlantic Ocean; China; Xizang; Radiolaria (protozoans)
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150757
作者单位	State Key Laboratory of Environmental Geology and Biogeology, China University of Geosciences, Beijing, 100083, China; School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China; School of Earth and Environmental Sciences, University of Queensland, Brisbane, 4072, Australia; Institute of Geology of Qinghai-Tibet Plateau, Chinese Academy of Sciences, Beijing, 100101, China
推荐引用方式 GB/T 7714	Wang T.,Li G.,Aitchison J.C.,et al. Evolution of mid-Cretaceous radiolarians in response to oceanic anoxic events in the eastern Tethys (southern Tibet; China)[J],2019,536.
APA	Wang T.,Li G.,Aitchison J.C.,Ding L.,&Sheng J..(2019).Evolution of mid-Cretaceous radiolarians in response to oceanic anoxic events in the eastern Tethys (southern Tibet; China).Palaeogeography, Palaeoclimatology, Palaeoecology,536.
MLA	Wang T.,et al."Evolution of mid-Cretaceous radiolarians in response to oceanic anoxic events in the eastern Tethys (southern Tibet; China)".Palaeogeography, Palaeoclimatology, Palaeoecology 536(2019).