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DOI | 10.1130/B35585.1 |
Jurassic tectonics of the eastern North China Craton: Response to initial subduction of the Paleo-Pacific Plate | |
Hao W.; Zhu R.; Zhu G. | |
发表日期 | 2020 |
ISSN | 167606 |
起始页码 | 19 |
结束页码 | 36 |
卷号 | 133 |
英文摘要 | The Yanshan fold-and-thrust belt (YFTB) on the northern margin of the eastern North China Craton (NCC) contains a succession of Jurassic volcano-sedimentary rocks that record the response of the NCC to the initial stages of subduction of the Paleo-Pacific Plate. We present stratigraphic profiles and new zircon U-Pb data from four basins in the YFTB to constrain the ages of the Jurassic lithological units and tectonic events related to the initial subduction. Following uplift at 200-190 Ma, protracted eruption of basalt at 188-167 Ma reflects the earliest tectonic activity in the YFTB. The eruption occurred in a backarc extensional setting, and migrated toward the west, consistent with WNWdirected subduction of the Paleo-Pacific Plate. The measured profiles and geochronological data demonstrate that the earliest phase of shortening in the YFTB during the Jurassic (event A of the Yanshan Movement in the Chinese literature) took place at 167 Ma. This compression terminated the magmatism and extension of the Early-Middle Jurassic, and resulted in the development of local thrusts, regional uplift, and a disconformity, without involvement of intense folding or the development of an angular unconformity. These observations are consistent with a weak to moderate intensity of deformation. The Jurassic rocks in the YFTB record the response of a backarc to the initial stages of subduction of the Paleo-Pacific Plate. Jurassic tectonics in the YFTB and the entire eastern China continent suggests that initial subduction of the Paleo-Pacific Plate began at ca. 190 Ma, and is consistent with the passive margin collapse model. 2020 Geological Society of America |
语种 | 英语 |
来源期刊 | Bulletin of the Geological Society of America
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/184800 |
作者单位 | State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Resource and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China |
推荐引用方式 GB/T 7714 | Hao W.,Zhu R.,Zhu G.. Jurassic tectonics of the eastern North China Craton: Response to initial subduction of the Paleo-Pacific Plate[J],2020,133. |
APA | Hao W.,Zhu R.,&Zhu G..(2020).Jurassic tectonics of the eastern North China Craton: Response to initial subduction of the Paleo-Pacific Plate.Bulletin of the Geological Society of America,133. |
MLA | Hao W.,et al."Jurassic tectonics of the eastern North China Craton: Response to initial subduction of the Paleo-Pacific Plate".Bulletin of the Geological Society of America 133(2020). |
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