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K-bentonite, black-shale and flysch successions at the Ordovician-Silurian transition, South China: Possible sedimentary responses to the accretion of Cathaysia to the Yangtze Block and its implications for the evolution of Gondwana

文献类型：期刊论文

作者Su, Wenbo1; Huff, Warren D.2; Ettensohn, Frank R.3; Liu, Xiaoming; Zhang, Ji'en4; Li, Zhiming5
刊名GONDWANA RESEARCH
出版日期2009-02-01
卷号15期号:1页码:111-130
关键词Cathaysia Block Yangtze Block K-bentonite-bearing black shale Flysch Geochemistry Gondwana Ordovician-Silurian transition
ISSN号1342-937X
DOI10.1016/j.gr.2008.06.004
文献子类Review
英文摘要The K-bentonite, black shale and flysch successions at the Ordovician-Silurian transition in South China have been the subject of comprehensive investigations relative to the probable accretion of the Yangtze Block and the questionable Cathaysia Block. First, the geochemical analyses of K-bentonites show that the parent magma originated in syn-collisional, volcanic-arc and within-plate tectonic settings, which produced mainly intermediate-to-felsic series magmas, associated with continuous collision and subduction of paleo-continental blocks/arcs. Further, the regional distribution of K-bentonite thickness indicates that voluminous explosive volcanism was located in the present southeastern shoreline provinces of China. Secondly, northwestwardly migrating, Ordovician-Silurian, transitional flysch successions, and the accompanying diachronous K-bentonite-bearing black-shale interval, as well as the related, overlying, shallowing-upward succession at the interior of the Yangtze Block, developed as an unconformity-bound sequence that mirrors foreland-basin tectophase cycles in the Appalachian basin. The above features suggest that the sequence accumulated in a similar foreland basin, which formed in response to adjacent deformational loading in a northwesterly migrating orogen located to the southeast. Geochemical and paleocurrent data from the turbiditic flyschoid sandstones also support these depositional settings. Accordingly, it seems that all criteria strongly support the presence of an Ordovician-Silurian, subduction-related orogen resulting from collision with a block to the southeast that must have been the original "Cathaysia Block" of Grabau and later workers. The K-bentonite, black-shale and flysch successions can be regarded as distal, foreland responses to the continuous northwestward collision and accretion of the Cathaysia Block to the Yangtze Block. Hence, we prefer to suggest that the suture zone with the sensu stricto Cathaysia Block probably developed along previously identified late Early Paleozoic suture relicts in the shoreline provinces of southeast China. On the other hand, although accretion of fragments with Cathaysian affinities to the Yangtze Block may have begun as early as Middle to Late Proterozoic time, the Ordovician-Silurian orogeny described above probably reflects the final phase of accretion between the two blocks. Moreover, when combined with similar peri-lapetan orogenic events in other areas during the same period, this accretion event may have been part of a major stage of global tectonic reconstruction in the evolution of Gondwana. (C) 2008 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
WOS关键词SHRIMP U-PB ; PERIPHERAL FORELAND BASINS ; NORTH-AMERICA ; TECTONIC EVOLUTION ; APPALACHIAN BASIN ; EASTERN INTERIOR ; MARGIN ; COLLISION ; MODEL ; ROCKS
WOS研究方向Geology
语种英语
WOS记录号WOS:000262539700009
出版者ELSEVIER SCIENCE BV
资助机构Natural Science Foundation of China(49802002 ; Natural Science Foundation of China(49802002 ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing), CAS(013101 ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing), CAS(013101 ; Sinopec(G0800-06-ZS-319) ; Sinopec(G0800-06-ZS-319) ; IGCP(503) ; IGCP(503) ; 40372057 ; 40372057 ; 033101) ; 033101) ; 40772076) ; 40772076) ; Natural Science Foundation of China(49802002 ; Natural Science Foundation of China(49802002 ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing), CAS(013101 ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing), CAS(013101 ; Sinopec(G0800-06-ZS-319) ; Sinopec(G0800-06-ZS-319) ; IGCP(503) ; IGCP(503) ; 40372057 ; 40372057 ; 033101) ; 033101) ; 40772076) ; 40772076) ; Natural Science Foundation of China(49802002 ; Natural Science Foundation of China(49802002 ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing), CAS(013101 ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing), CAS(013101 ; Sinopec(G0800-06-ZS-319) ; Sinopec(G0800-06-ZS-319) ; IGCP(503) ; IGCP(503) ; 40372057 ; 40372057 ; 033101) ; 033101) ; 40772076) ; 40772076) ; Natural Science Foundation of China(49802002 ; Natural Science Foundation of China(49802002 ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing), CAS(013101 ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing), CAS(013101 ; Sinopec(G0800-06-ZS-319) ; Sinopec(G0800-06-ZS-319) ; IGCP(503) ; IGCP(503) ; 40372057 ; 40372057 ; 033101) ; 033101) ; 40772076) ; 40772076)
源URL[http://ir.iggcas.ac.cn/handle/132A11/71471]  
专题中国科学院地质与地球物理研究所
通讯作者Su, Wenbo
作者单位1.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
2.Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA
3.Univ Kentucky, Dept Earth & Environm Sci, Lexington, KY 40506 USA
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
5.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Su, Wenbo,Huff, Warren D.,Ettensohn, Frank R.,et al. K-bentonite, black-shale and flysch successions at the Ordovician-Silurian transition, South China: Possible sedimentary responses to the accretion of Cathaysia to the Yangtze Block and its implications for the evolution of Gondwana[J]. GONDWANA RESEARCH,2009,15(1):111-130.
APA Su, Wenbo,Huff, Warren D.,Ettensohn, Frank R.,Liu, Xiaoming,Zhang, Ji'en,&Li, Zhiming.(2009).K-bentonite, black-shale and flysch successions at the Ordovician-Silurian transition, South China: Possible sedimentary responses to the accretion of Cathaysia to the Yangtze Block and its implications for the evolution of Gondwana.GONDWANA RESEARCH,15(1),111-130.
MLA Su, Wenbo,et al."K-bentonite, black-shale and flysch successions at the Ordovician-Silurian transition, South China: Possible sedimentary responses to the accretion of Cathaysia to the Yangtze Block and its implications for the evolution of Gondwana".GONDWANA RESEARCH 15.1(2009):111-130.

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