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Subduction Erosion, Crustal Structure, and an Evolutionary Model of the Northern Yap Subduction Zone: New Observations From the Latest Geophysical Survey
Zhang, Z. Y.1,2,3,4; Dong, D. D.1,4,5; Sun, W. D.3,4; Wu, S. G.6; Bai, Y. L.7; Wang, X. J.1,4,5; Fan, J. K.1,4,5
2019
Source PublicationGEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
ISSN1525-2027
Volume20Issue:1Pages:166-182
Abstract

The Yap subduction zone is a distinctive erosive margin with an extremely slow convergence rate. The high relief of the subducting plate, generated by horst and graben structures and seamounts, leads to attenuation of the crust. In this study, we present the latest geophysical data, collected by the Chinese research vessel Kexue, to investigate subduction erosion at the Yap subduction zone and develop subduction models for Yap subduction zone structures. We show an anomalous distance between the Yap Trench and the adjacent volcanic arc, the steep slope of the trench arcward, a frontal prism, and rare sediment in the trench, all typical features of erosive margins. We propose that the high-relief subducting plate has led to erosion of the overlying plate and that different subduction processes, controlled locally by the topography of the subducting plate, have modified the Yap subduction zone. Numerous normal faults increase the relief of the seafloor entering the trench, and an anomalously large slope angle along the trench reflects uplift of the fore-arc high via seamount subduction. In addition, the thin crust of the subducted horst and graben structures, along with the normal faults, might have eroded the fore-arc crust and subsequently eroded the Yap arc crust during subduction. These subduction erosional processes at the Yap Trench provide one of the best cases of an erosive margin in the world, particularly for a subduction zone with an extremely slow convergence rate.

KeywordYap Subduction Zone Subduction Erosion Crustal Structure Evolutionary Model Topography
DOI10.1029/2018GC007751
Indexed BySCI
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences ; National Programme on Global Change and AirSea Interaction ; National Natural Science Foundation of China ; RV KEXUE Advanced User Program
Language英语
Funding ProjectStrategic Priority Research Program of the Chinese Academy of Sciences[XDA11030102] ; National Programme on Global Change and AirSea Interaction[GASI-GEOGE-02] ; National Programme on Global Change and AirSea Interaction[GASI-GEOGE-01] ; National Natural Science Foundation of China[41476042] ; National Natural Science Foundation of China[41476046] ; National Natural Science Foundation of China[41576055] ; National Natural Science Foundation of China[41506059] ; RV KEXUE Advanced User Program[KEXUE2018G10]
WOS KeywordSediment Subduction ; Continental-crust ; Convergent Margin ; Seamount Subduction ; Tectonic Erosion ; Caroline Ridge ; Trench ; Arc ; Origin ; Plate
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000458607200009
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/6544
Collection深海科学研究部_深海地球物理与资源研究室
Corresponding AuthorDong, D. D.
Affiliation1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
6.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China
7.China Univ Petr, Sch Geosci, Qingdao, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Z. Y.,Dong, D. D.,Sun, W. D.,et al. Subduction Erosion, Crustal Structure, and an Evolutionary Model of the Northern Yap Subduction Zone: New Observations From the Latest Geophysical Survey[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2019,20(1):166-182.
APA Zhang, Z. Y..,Dong, D. D..,Sun, W. D..,Wu, S. G..,Bai, Y. L..,...&Fan, J. K..(2019).Subduction Erosion, Crustal Structure, and an Evolutionary Model of the Northern Yap Subduction Zone: New Observations From the Latest Geophysical Survey.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(1),166-182.
MLA Zhang, Z. Y.,et al."Subduction Erosion, Crustal Structure, and an Evolutionary Model of the Northern Yap Subduction Zone: New Observations From the Latest Geophysical Survey".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.1(2019):166-182.
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