气候变化领域集成服务门户(CCPortal): Influence of paleo-Trade Winds on facies patterns of the Cambrian Shanganning Carbonate Platform; North China

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DOI	10.1016/j.palaeo.2019.109556
	Influence of paleo-Trade Winds on facies patterns of the Cambrian Shanganning Carbonate Platform; North China
	Hu C.; Zhang Y.; Tian J.; Wang W.; Han C.; Wang H.; Li X.; Feng S.; Han C.; Algeo T.J.
发表日期	2020
ISSN	0031-0182
卷号	552
英文摘要	The Shanganning Carbonate Platform (SCP) of the North China Craton (NCC) was located in the Trade Winds belt during the Cambrian, which influenced its facies development. In recent years, numerous drillcores have been recovered from these units, but the depositional environments and facies architecture of this large (~2.0 × 105 km2) carbonate platform system have not yet been reported in detail. In this study, we integrate sedimentological and magnetic fabric data collected from outcrops and drillcores in order to document variation in microfacies and facies associations within the SCP, to infer paleowind directions and constrain the paleogeographic location of the SCP, and to evaluate eolian controls on platform development. This analysis documented numerous carbonate microfacies belonging to six fabric types (mudstone, wackestone, packstone, grainstone, framestone, and dolostone) along with rarer siliciclastic sediments. These microfacies belong to facies associations representing tidal flat, open platform, platform margin, slope, and deep basinal depositional environments. Anisotropy of magnetic susceptibility (AMS) measurements yielded mean paleocurrent directions for the Early, Middle, and Late Cambrian of 114°, 63°, and 83° (± ~30°) from paleo-north, respectively, that were relatively consistent for 12 out of 13 platform-margin sites, all vectors being corrected for a post-Cambrian ~150° clockwise rotation of the NCC. These wind orientations are consistent with the SCP shifting from south of the paleo-Equator in the Early Cambrian to north of it by the Middle Cambrian. Paleo-Trade Winds influenced facies patterns across the platform, producing a distinct windward-leeward zonation. The windward margin is characterized by well-sorted oolitic grainstone, as well as (favositids) coral and (dasycladacean) algal-sponge framestone, and the leeward margin by poorly-sorted oolitic wackestone-grainstone and fine bioclastic sediments. The present study is innovative in 1) integrating microfacies and AMS analyses in order to establish paleowind patterns and influences on an ancient carbonate platform, 2) documenting windward-leeward variation in quantifiable sediment properties across the SCP, and 3) constraining the paleo-hemispheric location of the NCC during the Cambrian. © 2019
英文关键词	Anisotropy of magnetic susceptibility; Carbonate microfacies; North China Craton; Ordos Basin; Paleogeography; Paleowind
语种	英语
scopus关键词	carbonate platform; core analysis; Earth rotation; facies analysis; magnetic anisotropy; magnetic fabric; microfacies; paleocurrent; paleogeography; sediment property; sedimentology; trade wind; North China Block; algae; Anthozoa; Dasycladaceae; Favositidae
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150461
作者单位	School of Geology and Mining Engineering, Xinjiang University, Urumqi, 830047, China; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; School of Energy Resources, China University of Geosciences (Beijing), Beijing, 100083, China; Department of Geology, University of Cincinnati, Cincinnati, 45221, United States; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China
推荐引用方式 GB/T 7714	Hu C.,Zhang Y.,Tian J.,et al. Influence of paleo-Trade Winds on facies patterns of the Cambrian Shanganning Carbonate Platform; North China[J],2020,552.
APA	Hu C..,Zhang Y..,Tian J..,Wang W..,Han C..,...&Algeo T.J..(2020).Influence of paleo-Trade Winds on facies patterns of the Cambrian Shanganning Carbonate Platform; North China.Palaeogeography, Palaeoclimatology, Palaeoecology,552.
MLA	Hu C.,et al."Influence of paleo-Trade Winds on facies patterns of the Cambrian Shanganning Carbonate Platform; North China".Palaeogeography, Palaeoclimatology, Palaeoecology 552(2020).