NIGPAS OpenIR
Paleo-environmental changes during the Middle-Late Ordovician transition on the Yangtze Platform, South China and their ecological implications
Fang, Xiang1,2; Li, Wenjie1,2,3; Zhang, Junpeng1,2,4,5; Song, Yanyan6; Zhang, Yuandong1,2,3
2020-12-15
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume560Pages:13
Abstract

Rocks of Darriwilian and Sandbian age (Middle-Late Ordovician) record the extraordinary peak of the Great Ordovician Biodiversification Event (GOBE) and significant global environmental changes. To track paleo-environmental changes through this critical time, we have analyzed iron speciation, trace elements and total organic carbon in samples of the Miaopo Formation from an intra-shelf basin in South China. The results reveal moderate primary productivity and possible fluctuations in benthic redox. Upwelling during marine transgression is thought to have increased the availability of nutrients in surface waters, sustaining the biological pump. Enhanced export of organic matter would have consumed dissolved oxygen at depth, driving the system toward anoxia. However, it is also possible for deep-water renewal events to transfer more dissolved oxygen into the bottom water. Those proxies suggests high primary productivity and varying sea level (global and local), not benthic anoxia, as the driver of accumulated "black shale". Thus, the local marine ecosystem thrived in this oxic intra-shelf basin, challenging the preexisting paradox that the high-diversity community flourished in an oxygen-depleted environment.

KeywordTransgression Productivity Redox conditions Iron speciation Redox-sensitive elements Black shale
DOI10.1016/j.palaeo.2020.109991
Indexed BySCI
Language英语
WOS KeywordCONTINENTAL-MARGIN SEDIMENTS ; CARBON-ISOTOPE STRATIGRAPHY ; FERRUGINOUS CONDITIONS ; WATER CARBONATES ; REDOX CONDITIONS ; TARIM BASIN ; IRON ; BIODIVERSIFICATION ; PROXIES ; SULFUR
Funding ProjectChinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41802023] ; National Natural Science Foundation of China[41772005] ; Natural Science Foundation in Jiangsu Province[BK20171103] ; Chinese Ministry of Science and Technology[2017ZX05036-001-004] ; Chinese Ministry of Science and Technology[2017ZX05035-002-001] ; State Key Laboratory of Palaeobiology and Stratigraphy[20172111] ; State Key Laboratory of Palaeobiology and Stratigraphy[20192102] ; China Scholarship Council (CSC)
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000591245000011
Funding OrganizationChinese Academy of Sciences ; National Natural Science Foundation of China ; Natural Science Foundation in Jiangsu Province ; Chinese Ministry of Science and Technology ; State Key Laboratory of Palaeobiology and Stratigraphy ; China Scholarship Council (CSC)
PublisherELSEVIER
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/37654
Collection中国科学院南京地质古生物研究所
Corresponding AuthorZhang, Junpeng
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA
5.Univ Calif Riverside, NASA Astrobiol Inst Alternat Earths Team, Riverside, CA 92521 USA
6.Univ Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Fang, Xiang,Li, Wenjie,Zhang, Junpeng,et al. Paleo-environmental changes during the Middle-Late Ordovician transition on the Yangtze Platform, South China and their ecological implications[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,560:13.
APA Fang, Xiang,Li, Wenjie,Zhang, Junpeng,Song, Yanyan,&Zhang, Yuandong.(2020).Paleo-environmental changes during the Middle-Late Ordovician transition on the Yangtze Platform, South China and their ecological implications.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,560,13.
MLA Fang, Xiang,et al."Paleo-environmental changes during the Middle-Late Ordovician transition on the Yangtze Platform, South China and their ecological implications".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 560(2020):13.
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