KMS Nanjing Institute of Geology and Palaeonotology,CAS
Late Triassic ecosystem variations inferred by palynological records from Hechuan, southern Sichuan Basin, China | |
Li, Liqin (李丽琴)1![]() ![]() | |
2018-11-01 | |
Source Publication | GEOLOGICAL MAGAZINE
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ISSN | 0016-7568 |
Volume | 155Issue:8Pages:1793-1810 |
Abstract | The Late Triassic deposits of the Sichuan Basin, southwestern China are significant for hosting abundant and diverse fossil assemblages including plants (containing spores and pollen), bivalves and insects. However, the Late Triassic palaeoecological variations are still poorly documented in this region. Here we present results from a palynological study from the Upper Triassic Xujiahe Formation in Hechuan of Chongqing, southern Sichuan Basin. The palynological analysis revealed a well-preserved terrestrial palynoflora of high diversity, comprising 184 species in 75 genera of spores and pollen. Three palynological assemblages were recognized, reflecting terrestrial successions throughout the entire interval with significant changes in the vegetation. Cycads/bennettites/ginkgophytes and conifers show an increasing trend into younger deposits, while ferns and lycopsids decrease in relative abundance. The Late Triassic vegetation underwent changes from lowland fern forest to a mixed forest with more canopy trees. We applied the Spore-pollen Morphological Group (SMG) method and Sporomorph EcoGroup (SEG) model to interpret the palaeoclimate features. The results reveal that the lower part of the Xujiahe Formation was deposited under relatively warm and humid conditions with an overall cooling and drying trend from latest Norian to Rhaetian time, accompanied by a general decrease of ferns and simultaneous increase of gymnosperms, and a decline in diversity of miospores. This study presents data on variations within the terrestrial ecosystem prior to the end-Triassic extinction event in the Sichuan Basin, and therefore provides important information for understanding the changes in the vegetation preceding the end-Triassic event. |
Keyword | End-triassic Event Palynology Mass Extinction Sporomorph Ecogroup Climate Change |
DOI | 10.1017/S0016756817000735 |
Language | 英语 |
WOS Keyword | Atlantic Magmatic Province ; In-situ Spores ; Large Igneous Provinces ; Jurassic Boundary ; Mass Extinction ; Triassic/jurassic Boundary ; East Greenland ; Ocean Acidification ; Fertile Organs ; Northwestern China |
Funding Project | Chinese Academy of Sciences[XDB18000000] ; Chinese Academy of Sciences[XDPB0506] ; National Natural Sciences Foundation of China[NSFC 41572014] ; National Natural Sciences Foundation of China[41688103] ; State Key Program of Research and Development of Ministry of Science and Technology, China[2016YFC0600406] ; State Key Laboratory of Palaeobiology and Stratigraphy[20172103] ; Swedish Research Council[VR 2015-04264] ; Lund University Carbon Cycle Centre (LUCCI) ; Unesco/IUGS[632] |
WOS Research Area | Geology |
WOS Subject | Geosciences, Multidisciplinary |
WOS ID | WOS:000445338400010 |
Funding Organization | Chinese Academy of Sciences ; National Natural Sciences Foundation of China ; State Key Program of Research and Development of Ministry of Science and Technology, China ; State Key Laboratory of Palaeobiology and Stratigraphy ; Swedish Research Council ; Lund University Carbon Cycle Centre (LUCCI) ; Unesco/IUGS |
Publisher | CAMBRIDGE UNIV PRESS |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.nigpas.ac.cn/handle/332004/16904 |
Collection | 中国科学院南京地质古生物研究所 |
Corresponding Author | Wang, Yongdong (王永栋) |
Affiliation | 1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China 2.Swedish Museum Nat Hist, Frescativagen 40, S-11418 Stockholm, Sweden |
First Author Affilication | Nanjing Institute of Geology and Palaeonotology,CAS |
Corresponding Author Affilication | Nanjing Institute of Geology and Palaeonotology,CAS |
Recommended Citation GB/T 7714 | Li, Liqin ,Wang, Yongdong ,Vajda, Vivi,et al. Late Triassic ecosystem variations inferred by palynological records from Hechuan, southern Sichuan Basin, China[J]. GEOLOGICAL MAGAZINE,2018,155(8):1793-1810. |
APA | Li, Liqin ,Wang, Yongdong ,Vajda, Vivi,&Liu, Zhaosheng.(2018).Late Triassic ecosystem variations inferred by palynological records from Hechuan, southern Sichuan Basin, China.GEOLOGICAL MAGAZINE,155(8),1793-1810. |
MLA | Li, Liqin ,et al."Late Triassic ecosystem variations inferred by palynological records from Hechuan, southern Sichuan Basin, China".GEOLOGICAL MAGAZINE 155.8(2018):1793-1810. |
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