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Fluid discharge linked to bending of the incoming plate at the Mariana subduction zone
Du, M.1; Peng, X.1; Seyfried, W. E., Jr.2; Ta, K.1; Guo, Z.1; Chen, S.1; Chou, I. -M.1,3; Li, J.1; Xu, H.1
2019-06-05
Source PublicationGEOCHEMICAL PERSPECTIVES LETTERS
ISSN2410-339X
Volume11Issue:1Pages:1-5
Abstract

Tectonically induced bending of incoming plates at subduction zones can result in normal faulting in the upper ocean crust. Seismic surveys and numerical models indicate enhanced permeability and fluid circulation when this occurs. Yet, direct geological evidence of such effects on the seafloor is lacking. Here we report Human Occupied Vehicle (HOV) based observations of the existence of fluid discharge features on the seafloor of the incoming plate of the Mariana subduction zone. These features include fluid discharge points and associated pockmarks, which are striking, and occur in abundance in several depth related fields. The existence of Galatheid crabs, a typical seep related organism, also indicates fluid discharge from the seafloor. Alteration of the coexisting basaltic ocean crust is extensive, with iddingsite-rich muds within and overlapping the apparent fluid discharge zones. Our findings are significant in that they suggest that structural deformation of the incoming plate could substantially influence chemical exchange between the upper ocean crust and seawater in a new way. We further suggest that these fluid discharge points may represent previously unknown niches for H-2-based chemolithotrophic life and microbial ecosystems at deep trenches. Observations reported here contrast both chemically and physically with serpentine mud volcano formation associated with the shallower Mariana forearc region.

DOI10.7185/geochemlet.1916
Indexed BySCI
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences ; National key research and development plan of China
Language英语
Funding ProjectStrategic Priority Research Program of the Chinese Academy of Sciences[XDB06020000] ; National key research and development plan of China[2016YFC0304900] ; National key research and development plan of China[2016YFC0302301] ; National key research and development plan of China[2016YFC0300503]
WOS KeywordMud Volcanism ; Mantle Serpentinization ; Hydrogen ; Ridge ; Pressure ; Offshore ; Complex ; Basalt ; Crust
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000470937000001
PublisherEUROPEAN ASSOC GEOCHEMISTRY
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/6840
Collection深海科学研究部_深海地质与地球化学研究室
深海科学研究部_深海极端环境模拟研究实验室
研究生部
所领导_其他
Corresponding AuthorPeng, X.
Affiliation1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Hainan, Peoples R China
2.Univ Minnesota, Dept Earth Sci, 310 Pillsbury Dr, Minneapolis, MN 55455 USA
3.US Geol Survey, 954 Natl Ctr, Reston, VA 20192 USA
First Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Corresponding Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
GB/T 7714
Du, M.,Peng, X.,Seyfried, W. E., Jr.,et al. Fluid discharge linked to bending of the incoming plate at the Mariana subduction zone[J]. GEOCHEMICAL PERSPECTIVES LETTERS,2019,11(1):1-5.
APA Du, M..,Peng, X..,Seyfried, W. E., Jr..,Ta, K..,Guo, Z..,...&Xu, H..(2019).Fluid discharge linked to bending of the incoming plate at the Mariana subduction zone.GEOCHEMICAL PERSPECTIVES LETTERS,11(1),1-5.
MLA Du, M.,et al."Fluid discharge linked to bending of the incoming plate at the Mariana subduction zone".GEOCHEMICAL PERSPECTIVES LETTERS 11.1(2019):1-5.
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