globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.10.006
论文题名:
Late Devonian radiolarian-bearing siliceous rocks from the Karamay ophiolitic mélange in western Junggar: Implications for the evolution of the Paleo-Asian Ocean
作者: Zong R.; Wang Z.; Jiang T.; Gong Y.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 448
起始页码: 266
结束页码: 278
语种: 英语
英文关键词: Late Devonian ; Ophiolitic mélange ; Paleo-Asian Ocean ; Radiolarians ; Siliceous rocks ; Western Junggar
英文摘要: Abundant Late Devonian radiolarians occur in the siliceous rocks of the Karamay ophiolitic mélange in western Junggar. The siliceous rocks are interpreted as deposit in a remnant oceanic basin in view of their petrological and geochemical characteristics. New data suggest that the age of the Karamay ophiolitic mélange can be extended from the Ordovician to Late Devonian, thus representing the youngest known oceanic crust in western Junggar, which indicates that the closure of the Paleo-Asian Ocean was at least after the Late Devonian in southern western Junggar. The Carboniferous formation capping the siliceous rocks units comprises, in ascending order, a broad regressive sequence from the abyssal-bathyal turbidites, littoral-neritic carbonates, and calcareous clastic rocks to molasse, indicating that the ocean-continent transformation probably occurred in the Devonian-Carboniferous transition or the early Early Carboniferous. The oceanic basin was filled with volcaniclastic turbidites in the Visean-Serpukhovian, and evolved into a residual sea basin in the Late Carboniferous. The final closure of the Paleo-Asian Ocean in western Junggar was marked by the emergence of molasse in the late Late Carboniferous. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68513
Appears in Collections:过去全球变化的重建

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作者单位: State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, China; No. 207 Geology Brigade of Sichuan Bureau of Exploration and Development of Geology and Minerals Resources, Leshan, China

Recommended Citation:
Zong R.,Wang Z.,Jiang T.,et al. Late Devonian radiolarian-bearing siliceous rocks from the Karamay ophiolitic mélange in western Junggar: Implications for the evolution of the Paleo-Asian Ocean[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,448
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