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Depositional facies and cyclic patterns in a subtidal-dominated ramp during the Early-Middle Ordovician in the western Tarim Basin (NW China)

文献类型：期刊论文

作者Guo, Chuan1; Chen, Daizhao1,2; Zhou, Xiqiang1,2; Ding, Yi1,2; Wei, Wenwen1,2; Zhang, Gongjing1,2
刊名FACIES
出版日期2018-07-01
卷号64期号:3
关键词Carbonate ramp Depositional facies High-frequency cycles Sequence correlation Lower-Middle Ordovician Tarim Basin
ISSN号0172-9179
DOI10.1007/s10347-018-0529-0
文献子类Article
英文摘要Due to a long-term transgression since the Early Cambrian, an extensive shallow-water carbonate platform was developed in the entire Tarim Basin (NW China). During the deposition of the Yingshan Formation (Early-Middle Ordovician), a carbonate ramp system was formed in the intrashelf basin in the Bachu-Keping area of the western basin. Four well-exposed outcrop sections were selected to investigate their depositional facies, cycles, and sequences, as well as the depositional evolution. Detailed facies analyses permit the recognition of three depositional facies associations, including peritidal, semi-restricted subtidal, and open-marine subtidal facies, and eleven types of lithofacies. These are vertically arranged into meter-scale, shallowing-upward peritidal, semi-restricted subtidal, and open-marine subtidal cycles, in the span of Milankovitch frequency bands, suggesting a dominant control of Earth's orbital forcing on the cyclic sedimentation on the platform. On the basis of vertical facies (or lithofacies) and cycle stacking patterns, as well as accommodation changes illustrated graphically by Fischer plots at all studied sections, six third-order depositional sequences are recognized and consist of lower transgressive and upper regressive parts. In shallow depositional settings, the transgressive packages are dominated by thicker-than-average, shallow subtidal cycles, whereas the regressive parts are mainly represented by thinner-than-average, relatively shallow subtidal to peritidal cycles. In relatively deep environments, however, the transgressive and regressive successions display the opposite trends of cycle stacking patterns, i.e., thinner-than-average subtidal cycles of transgressive packages. Sequence boundaries are mainly characterized by laterally traceable, transitional zones without apparent subaerial exposure features. Good correlation of the long-term changes in accommodation space inferred from vertical facies and cycle stacking patterns with sea-level fluctuations elsewhere around the world suggests an overriding eustatic control on cycle origination, platform building-up and evolution during the Early-Middle Ordovician, although with localized influences of syndepositional faulting and depositional settings.
WOS关键词RESOLUTION SEQUENCE STRATIGRAPHY ; SEA-LEVEL CHANGES ; CARBONATE CYCLES ; SOUTH CHINA ; STACKING PATTERNS ; HIGH-FREQUENCY ; FISCHER PLOTS ; PLATFORM ; CYCLOSTRATIGRAPHY ; SEDIMENTATION
WOS研究方向Geology ; Paleontology
语种英语
WOS记录号WOS:000431759500003
出版者SPRINGER
资助机构National Natural Science Foundation of China(U1663209 ; National Natural Science Foundation of China(U1663209 ; 41502117 ; 41502117 ; 41502118) ; 41502118) ; National Natural Science Foundation of China(U1663209 ; National Natural Science Foundation of China(U1663209 ; 41502117 ; 41502117 ; 41502118) ; 41502118) ; National Natural Science Foundation of China(U1663209 ; National Natural Science Foundation of China(U1663209 ; 41502117 ; 41502117 ; 41502118) ; 41502118) ; National Natural Science Foundation of China(U1663209 ; National Natural Science Foundation of China(U1663209 ; 41502117 ; 41502117 ; 41502118) ; 41502118)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88274]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Chen, Daizhao
作者单位1.Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Chuan,Chen, Daizhao,Zhou, Xiqiang,et al. Depositional facies and cyclic patterns in a subtidal-dominated ramp during the Early-Middle Ordovician in the western Tarim Basin (NW China)[J]. FACIES,2018,64(3).
APA Guo, Chuan,Chen, Daizhao,Zhou, Xiqiang,Ding, Yi,Wei, Wenwen,&Zhang, Gongjing.(2018).Depositional facies and cyclic patterns in a subtidal-dominated ramp during the Early-Middle Ordovician in the western Tarim Basin (NW China).FACIES,64(3).
MLA Guo, Chuan,et al."Depositional facies and cyclic patterns in a subtidal-dominated ramp during the Early-Middle Ordovician in the western Tarim Basin (NW China)".FACIES 64.3(2018).

入库方式： OAI收割

来源：地质与地球物理研究所

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