globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2020.228532
论文题名:
Significance of crustal extension and magmatism to gold deposits beneath Jiaodong Peninsula, eastern North China Craton: Seismic evidence from receiver function imaging with a dense array
作者: Yu G.; Xu T.; Ai Y.; Chen L.; Yang J.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 789
语种: 英语
中文关键词: Crustal extension ; Dense array ; Gold deposits ; Jiaodong Peninsula ; Receiver function
英文关键词: Deposits ; Seismic waves ; Seismology ; Bouguer gravity anomalies ; Gold mineralization ; Jiaodong peninsulas ; Lithospheric thinning ; Low velocity zones ; Metallogenic belt ; North China Craton ; Receiver functions ; Gold deposits ; craton ; crust-mantle boundary ; detachment fault ; extensional tectonics ; gold ; magmatism ; mineralization ; ore deposit ; transition zone ; upper crust ; China ; Jiaolai Basin ; North China Block ; Shandong ; Shandong Peninsula
英文摘要: The Jiaodong Peninsula, located in the eastern North China Craton (NCC), is a key region to study the genetic linkage between large-scale gold mineralization and craton destruction. We construct a fine crustal structural image across the Jiaodong Peninsula, using teleseismic P-wave receiver function data recorded by a dense linear array of 340 short-period seismic stations. The results reveal significant similarities and differences between the eastern and the western Jiaodong Peninsula. The presence of an intracrustal low-velocity zone, and the north-dipping interfaces beneath the Jiaolai Basin imply widespread crustal extension in the whole region. In the northwest Jiaodong metallogenic belt, the identified detachment faults, small vertical velocity gradients in the upper part of the lower crust and the thick crust-mantle transition zone provide evidences for intense crustal extension in this area, probably coeval with the peak of lithospheric thinning and destruction of the eastern NCC in the Late Mesozoic. In the Muru metallogenic belt, distinct differences are found on the opposite sides of the Wulian-Yantai Fault Zone (WYFZ), in the depth and structure of the Moho, intracrustal low-velocity zone, upper crustal Vp/Vs ratios, and Bouguer gravity anomalies, indicating that the WYFZ may be a steep transcrustal fault. We propose that the coupled effects of intense crustal extension, voluminous magmatism and water released from the subducting Paleo-Pacific slab may have been responsible for the concentrated gold deposits in the northwest Jiaodong during the peak of the NCC destruction, while limited gold deposits in the Muru metallogenic belt may have been attributed to relatively weak crustal extension and steep faults. © 2020 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/170742
Appears in Collections:气候变化与战略

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作者单位: State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; Key Laboratory of Earth and Planetary Physics, Chinese Academy of Sciences, Beijing, 100029, China; Innovation Academy for Earth Science, CAS, Beijing, 100029, China; University of Chinese Academy of Science, Beijing, 100049, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China

Recommended Citation:
Yu G.,Xu T.,Ai Y.,et al. Significance of crustal extension and magmatism to gold deposits beneath Jiaodong Peninsula, eastern North China Craton: Seismic evidence from receiver function imaging with a dense array[J]. Tectonophysics,2020-01-01,789
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