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Environmental changes in the Middle Triassic lacustrine basin (Ordos, North China): Implication for biotic recovery of freshwater ecosystem following the Permian-Triassic mass extinction
Liu, Hanlin1,2; Qiu, Zhen1,3; Zou, Caineng1,3; Fu, Jinhua4; Zhang, Wenzheng4; Tao, Huifei5; Li, Shixiang4; Zhou, Shangwen1,3; Wang, Lu2; Chen, Zhong-Qiang6
2021-09-01
Source PublicationGLOBAL AND PLANETARY CHANGE
ISSN0921-8181
Volume204Pages:13
AbstractIncreasing evidence shows that the recovery of marine ecosystems after the Permian/Triassic mass extinction (PTME) was coupled with environmental amelioration. Recently, abundant insects and complete trophic structures were unraveled from the Ladinian (late Middle Triassic) in the Ordos basin, central China, deciphering recovery of lacustrine ecosystem from the PTME. Coeval environmental settings, however, remain unclear. In the Ordos basin, the Ladinian succession is dominated by black organic-matter-rich shales of the Chang 7 Member of the Yanchang Formation, and their depositional environments and palaeo-productivity are reconstructed based on major and trace element concentrations, pyrite framboid size and morphology, and total organic carbon (TOC) contents. High values of TOC and phosphorous (P) concentrations, as well as more enrichment of trace-metal elements such as Copper (Cu) and zinc (Zn) all indicate a rather high primary productivity. Such a high productivity during the deposition of the Chang 73 sub-member is also reinforced by and the presence of abundant organic-matter-enrich laminae in black shales and the diverse chrysophytes, as well as intensive occurrence of tuff layers and possible hydrothermal fluids. Analyses of framboidal pyrite size and morphology as well as C-org/P ratio and trace-metal elements such as molybdenum (Mo) and uranium (U), indicate the dysoxic to oxic conditions in water columns of the Ordos lake during the late Middle Triassic. The Ladinian-Carnian cooling likely promoted the occurrence of dissolved oxygens in the lake. As a result, although the massive black shales of the Chang 73 sub-member were deposited and suggest a rather high primary productivity, they also indicate slightly oxygen-poor to oxygenated conditions of water columns, which are inductive for lacustrine biota to inhabit, and also offer hospitable habitats for freshwater lake ecosystems to recover from the PTME.
KeywordMass extinction Recovery Element geochemistry Framboidal pyrite Organic-rich shale Chang 7 Member Middle Triassic Ordos Basin
DOI10.1016/j.gloplacha.2021.103559
Funding OrganizationNational Natural Science Foundation of China, NSFC ; National Natural Science Foundation of China, NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China, NSFC ; National Natural Science Foundation of China, NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China, NSFC ; National Natural Science Foundation of China, NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China, NSFC ; National Natural Science Foundation of China, NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina
WOS KeywordYANCHANG FORMATION ; TECTONIC EVOLUTION ; ORGANIC-CARBON ; RICH SHALES ; 7 MEMBER ; PHOSPHORUS ; DEPOSITION ; PALEOPRODUCTIVITY ; PRODUCTIVITY ; TRANSITION
Language英语
Funding ProjectNational Natural Science Foundation of China, NSFC[41602119] ; National Natural Science Foundation of China, NSFC[41930322] ; Youth Innovation Promotion Association CAS[2016068] ; Science and Technology Major Projects of PetroChina[2021DJ2001]
Funding OrganizationNational Natural Science Foundation of China, NSFC ; National Natural Science Foundation of China, NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China, NSFC ; National Natural Science Foundation of China, NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China, NSFC ; National Natural Science Foundation of China, NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China, NSFC ; National Natural Science Foundation of China, NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000807918400001
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/106061
Collection兰州油气中心
Corresponding AuthorQiu, Zhen; Zou, Caineng
Affiliation1.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
2.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
3.Natl Energy Shale Gas R&D Expt Ctr, Langfang 065007, Hebei, Peoples R China
4.PetroChina, Changqing Oilfield Co, Xian 710018, Peoples R China
5.Chinese Acad Sci, Lanzhou Ctr Oil & Gas Resources, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
6.China Univ Geosci Wuhan, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
Recommended Citation
GB/T 7714
Liu, Hanlin,Qiu, Zhen,Zou, Caineng,et al. Environmental changes in the Middle Triassic lacustrine basin (Ordos, North China): Implication for biotic recovery of freshwater ecosystem following the Permian-Triassic mass extinction[J]. GLOBAL AND PLANETARY CHANGE,2021,204:13.
APA Liu, Hanlin.,Qiu, Zhen.,Zou, Caineng.,Fu, Jinhua.,Zhang, Wenzheng.,...&Chen, Zhong-Qiang.(2021).Environmental changes in the Middle Triassic lacustrine basin (Ordos, North China): Implication for biotic recovery of freshwater ecosystem following the Permian-Triassic mass extinction.GLOBAL AND PLANETARY CHANGE,204,13.
MLA Liu, Hanlin,et al."Environmental changes in the Middle Triassic lacustrine basin (Ordos, North China): Implication for biotic recovery of freshwater ecosystem following the Permian-Triassic mass extinction".GLOBAL AND PLANETARY CHANGE 204(2021):13.
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