IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Late Mesozoic extensional structures and gold mineralization in Jiaodong Peninsula, eastern North China Craton: an inspiration from ambient noise tomography on data from a dense seismic array
Yu GuiPing1,3; Xu Tao1,4; Liu JunTong2,3; Ai YinShuang2,3,4
2020-05-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
Volume63Issue:5Pages:1878-1893
AbstractResearch suggests that since the late Mesozoic, the eastern North China Craton has experienced large-scale lithospheric destruction characterized by lithospheric thinning. Under this context, large-scale extensional structures, widespread granitoid intrusions and massive gold deposits have been formed in Jiaodong Peninsula in the eastern North China Craton. In order to reveal the characteristics of ore-controlling structures in upper crust and their genetic linkage with gold mineralization, we probe the fine S-wave velocity structure of the shallow crust above 8km by using ambient noise tomography from a NWW-SEE trending linear short-period dense seismic array across Jiaodong Peninsula. Results show that (1) the sedimentary layer in Jiaodong Peninsula is generally thin, with an average basement depth about 1 similar to 2 km. (2) The vertical velocity gradient image shows that the dislocation of basement/shallow high-velocity discontinuity in northwest Jiaodong is significant, corresponding well to the main detachment faults, and the relative velocity disturbance image exhibits several banding low-velocity anomalies with SE tendency along the main detachment faults. (3) The S-wave velocity under the Muru metallogenic belt has a block feature in horizontal direction, which is consistent with the steeply dipping feature of ore-controlling faults such as the Wulian-Yantai fault zone, and the average velocity of upper crust in the Sulu orogenic belt is significantly higher than that in northwest Jiaodong. Based on the imaging results of this paper and other geological and geophysical data available, we suggest that northwest Jiaodong is mainly controlled by large-scale detachment faults represented by the Zhaoping fault, while the Muru metallogenic belt in the east is mainly controlled by steep brittle (strike-slip) faults with a relatively low degree of extension. And the differences of ore-controlling structures may be the main reason for regional differences of gold mineralization in Jiaodong Peninsula.
KeywordJiaodong Peninsula Gold mineralization Extensional structure Short-period dense seismic array Ambient noise tomography
DOI10.6038/cjg2020N0446
WOS KeywordCRUSTAL VELOCITY STRUCTURE ; SURFACE-WAVE DISPERSION ; SHANDONG PROVINCE ; STRUCTURE BENEATH ; SOUTH CHINA ; FAULT ZONE ; TAN-LU ; DEPOSITS ; COLLISION ; TERRANE
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000539702900013
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96927
Collection岩石圈演化国家重点实验室
地球与行星物理院重点实验室
Corresponding AuthorXu Tao
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Yu GuiPing,Xu Tao,Liu JunTong,et al. Late Mesozoic extensional structures and gold mineralization in Jiaodong Peninsula, eastern North China Craton: an inspiration from ambient noise tomography on data from a dense seismic array[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(5):1878-1893.
APA Yu GuiPing,Xu Tao,Liu JunTong,&Ai YinShuang.(2020).Late Mesozoic extensional structures and gold mineralization in Jiaodong Peninsula, eastern North China Craton: an inspiration from ambient noise tomography on data from a dense seismic array.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(5),1878-1893.
MLA Yu GuiPing,et al."Late Mesozoic extensional structures and gold mineralization in Jiaodong Peninsula, eastern North China Craton: an inspiration from ambient noise tomography on data from a dense seismic array".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.5(2020):1878-1893.
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