SCSIO OpenIR  > 中科院边缘海地质重点实验室
Late Cenozoic subsidence and sedimentary features of the basins in the northwestern South China Sea : implications for the development of the deep anomalous progress
Chen Mei1; Shi XiaoBin; Ren ZiQiang1; Xu ZiYing2; Liu Kai3; Liu Hang3
2019
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
Volume62Issue:2Pages:587
AbstractA large amount of alkaline basalts developed in the Leiqiong area, northwestern South China Sea during the Late Cenozoic. Seismic tomography shows that just below the Leiqiong region, there is a mantle plume-like low-velocity thermal anomalous structure (LVA). In order to reveal the LVA's activity and effect on surface processes, we have systematically analyzed the Late Cenozoic subsidence history, erosion surfaces and magma activity of the Zhu III depression and the Beibuwan Basin. The results show that tectonic subsidence in these basins slow down abnormally in the Late Miocene. Furthermore, since the Late Miocene two erosion surfaces (T1 and T0) have been developed due to local basement uplift events. The T1 and T0 erosion surfaces distributed annularly around the Leigiong volcanic region, and the accumulated erosion thickness in interior is larger, ranging from 100 to 200 m. In addition, since the end of Middle Miocene, local magmatism leaded to arching of overlying strata and sedimentary environment changing. Our analysis show that the observed LVA has limited effect on superficial vertical motion. We speculate that the LVA is small in scale, and might be just a branch of deep much larger low-velocity abnormal structure.
DepartmentOMG
KeywordLeigiong low-velocity anomalous structure Tectonic subsidence Erosion surface feature Beibuwan Basin Zhu III Depression
DOI10.6038/cjg2019L0757
Citation statistics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17981
Collection中科院边缘海地质重点实验室
Affiliation1.South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Guangzhou Marine Geol Survey, MLR Key Lab Marine Mineral Resources, Guangzhou 510075, Guangdong, Peoples R China
4.CNOOC Ltd, Zhanjiang Branch, Zhanjiang 524057, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Chen Mei,Shi XiaoBin,Ren ZiQiang,et al. Late Cenozoic subsidence and sedimentary features of the basins in the northwestern South China Sea : implications for the development of the deep anomalous progress[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(2):587, 603.
APA Chen Mei,Shi XiaoBin,Ren ZiQiang,Xu ZiYing,Liu Kai,&Liu Hang.(2019).Late Cenozoic subsidence and sedimentary features of the basins in the northwestern South China Sea : implications for the development of the deep anomalous progress.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(2),587.
MLA Chen Mei,et al."Late Cenozoic subsidence and sedimentary features of the basins in the northwestern South China Sea : implications for the development of the deep anomalous progress".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.2(2019):587.
Files in This Item:
File Name/Size DocType Version Access License
南海西北部沉积盆地晚新生代沉降、沉积特征(13763KB)期刊论文出版稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.