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Deformation and faulting of subduction overriding plate caused by a subducted seamount
Ding, Min; Lin, Jian; Lin, J (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China.; Lin, J (reprint author), Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA.
2016
Source PublicationGEOPHYSICAL RESEARCH LETTERS
Volume43Issue:17Pages:8936-8944
AbstractWe conducted numerical experiments to simulate elastoplastic deformation of the overriding plate caused by a subducted seamount. Calculations revealed development of a distinct pair of fault-like shear zones, including a landward dipping forethrust fault initiated from the seamount top and a seaward dipping backthrust fault from the landward base of the seamount. Significant dome-shaped surface uplift was predicted above the thrust faults. Lesser-developed seaward dipping backthrust faults were calculated to develop under certain conditions. The overriding plate was calculated to deform in two stages: In Stage I, elastic deformation leads to the formation of fault-like shear zones. After major faults have cut through the entire plate, plastic deformation on faults dominates Stage II. On the subduction interface, compressional normal stress was calculated to increase on the landward leading flank of the seamount and decrease on the seaward trailing flank. These changes, together with associated stress singularities at seamount edges, could affect earthquake processes.
Department[Ding, Min] Woods Hole Oceanog Inst, MIT WHOI Joint Program, Woods Hole, MA 02543 USA; [Ding, Min] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA; [Lin, Jian] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China; [Lin, Jian] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA ; 边缘海地质
KeywordSeamount Overriding Plate Elastoplasticity Fault Formation Earthquakes
Subject AreaGeology
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15322
Collection中科院边缘海地质重点实验室
Corresponding AuthorLin, J (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China.; Lin, J (reprint author), Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA.
Recommended Citation
GB/T 7714
Ding, Min,Lin, Jian,Lin, J ,et al. Deformation and faulting of subduction overriding plate caused by a subducted seamount[J]. GEOPHYSICAL RESEARCH LETTERS,2016,43(17):8936-8944.
APA Ding, Min,Lin, Jian,Lin, J ,&Lin, J .(2016).Deformation and faulting of subduction overriding plate caused by a subducted seamount.GEOPHYSICAL RESEARCH LETTERS,43(17),8936-8944.
MLA Ding, Min,et al."Deformation and faulting of subduction overriding plate caused by a subducted seamount".GEOPHYSICAL RESEARCH LETTERS 43.17(2016):8936-8944.
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