气候变化领域集成服务门户(CCPortal): 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

CCPortal

DOI	10.1016/j.tecto.2020.228532
	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
	Yu G.; Xu T.; Ai Y.; Chen L.; Yang J.
发表日期	2020
ISSN	00401951
卷号	789
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.
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
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207909
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
推荐引用方式 GB/T 7714	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],2020,789.
APA	Yu G.,Xu T.,Ai Y.,Chen L.,&Yang J..(2020).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.Tectonophysics,789.
MLA	Yu G.,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".Tectonophysics 789(2020).