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Slump sheets as a record of regional tectonics and paleogeographic changes in South China
Li, Wenjie (李文杰)1,2,3,4; Chen, Jitao (陈吉涛)1,2,5; Wang, Longwu6; Fang, Xiang (方翔)1,2; Zhang, Yuandong (张元动)1,2,3,4
2019-10-01
Source PublicationSEDIMENTARY GEOLOGY
ISSN0037-0738
Volume392Pages:18
Abstract

Slumps of various scales are recognized in the late Katian (late Ordovician) mixed carbonate and siliciclastic slope successions in the Changshan area, western Zhejiang Province, South China. In order to understand their deformational processes, triggering mechanisms, paleo-slope orientation and geological implications, a detailed sedimentological study was carried out on four outcrop sections. In the southern Changshan (the Putangkou, Zhoutang and Shikeng sections), we recognized three slumping episodes (ca. 3.5 m, 11 m, and 73 m in thickness in stratigraphically ascending order) and co-occurred debris flows. At the Sanqushan section (similar to 11.5 km north of Changshan), thirteen slump units, each being tens of cm to 6 m in thickness, are recognized. Facies analyses and diagenetic characteristics of these slumps and their internal deformation structures suggest that they formed as a result of plastic and brittle deformation, and liquefaction and fluidization during slumping. The rip-up blocks, cracks and ruptured beds in the slumps of southern Changshan indicate extensional features, whereas recumbent and disharmonic folds in the slumps of northern Changshan represent compressional features. These spatially different features suggest that the slumps may have been generated on a paleo-slope dipping generally to the north. The case study of slumps and debris flows from the Putangkou section indicates a significant mass flow transition from a slumped mass into debris flow deposits. Autogenic triggering mechanisms of these slumps, e.g., rapid deposition, storm-wave loading, and tidal shear, are ruled out by the results of facies analysis. Instead, the slumps might have been triggered by relative sea-level changes or tectonically-induced, progressively steepening of the slope, which is likely related to the contemporaneous Kwangsian Orogeny. (C) 2019 Elsevier B.V. All rights reserved.

KeywordLate Katian Soft-sediment deformation structures Slumps Debris flows Kwangsian Orogeny South China
DOI10.1016/j.sedgeo.2019.105525
Language英语
WOS KeywordSOFT-SEDIMENT DEFORMATION ; CONTINENTAL-MARGIN ; CARBONATE SUCCESSION ; SHANDONG PROVINCE ; KWANGSIAN OROGENY ; BETIC CORDILLERA ; UPPER ORDOVICIAN ; GRAVITY-FLOW ; DEBRIS FLOW ; BASIN
Funding ProjectChinese Academy of Sciences[XDB26000000] ; Chinese Academy of Sciences[XDB10010100] ; Ministry of Science and Technology of the People's Republic of China[2013FY111000] ; Ministry of Science and Technology of the People's Republic of China[2017ZX05036-001-004] ; National Natural Science Foundation of China[41772005] ; IGCP projects[653]
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000500388200002
Funding OrganizationChinese Academy of Sciences ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; IGCP projects
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/29434
Collection中国科学院南京地质古生物研究所
Corresponding AuthorChen, Jitao (陈吉涛)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Changshan Natl Geopk, Academician Studio, Changshan 324200, Peoples R China
5.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao 266590, Shandong, Peoples R China
6.Zhejiang Inst Geol Survey, Hangzhou 311203, Zhejiang, 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
Li, Wenjie ,Chen, Jitao ,Wang, Longwu,et al. Slump sheets as a record of regional tectonics and paleogeographic changes in South China[J]. SEDIMENTARY GEOLOGY,2019,392:18.
APA Li, Wenjie ,Chen, Jitao ,Wang, Longwu,Fang, Xiang ,&Zhang, Yuandong .(2019).Slump sheets as a record of regional tectonics and paleogeographic changes in South China.SEDIMENTARY GEOLOGY,392,18.
MLA Li, Wenjie ,et al."Slump sheets as a record of regional tectonics and paleogeographic changes in South China".SEDIMENTARY GEOLOGY 392(2019):18.
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