Neogene subduction initiation models in the western Pacific and analysis of subduction zone parameters

Li, Min; Huang, Song; Hao, Tianyao; Dong, Miao; Xu, Yang; Zhang, Jian; He, Qing-Yu; Fang, Gui

doi:10.1007/s11430-022-1065-1

Cited by 4 publications

(2 citation statements)

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“…Southeast Asia is home to several small oceanic basins and subduction zones that are relatively young (Figure 1a; Hall, 1996, 2012; Hall & Spakman, 2015; Lai et al., 2021; Li et al., 2023). Examples include the Cotabato and Sulawesi subduction zones, which were initiated during the Pliocene or Late Miocene (Kopp et al., 1999; Schlüter et al., 2001; Silver et al., 1983) and have subduction slabs with a maximum depth in the middle of the trench and a gradual decrease in length along both sides (Figures 1c and 1d).…”

Section: Introductionmentioning

confidence: 99%

Subduction Initiation at the Corner of Small Oceanic Basins

Dong,

Hao,

et al. 2024

Geophysical Research Letters

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In Southeast Asia, emerging subduction zones often appear to begin at the corners of small oceanic basins, which have a triangular‐indenter continent–ocean boundary geometry. To investigate the influence of a triangular corner on subduction initiation, we performed a series of three‐dimensional numerical simulations with varying corner angles and base lengths. The results show that the apex of the corner constitutes the initial location of subduction, irrespective of the angle or the extent of the corner. Smaller angle corners are more likely to facilitate subduction initiation. At the same time, wide acute angle corners are difficult to form. Our findings suggest that triangular corner structures may facilitate subduction initiation in smaller basins; however, the role such corners in subduction initiation is limited in larger basins. Our results emphasize the importance of accounting for the three‐dimensional geometry of a subduction zone when examining its subduction dynamics and geological features.

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Section: Introductionmentioning

confidence: 99%

Subduction Initiation at the Corner of Small Oceanic Basins

Dong,

Hao,

et al. 2024

Geophysical Research Letters

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show abstract

“…Southeast Asia is home to several small oceanic basins and subduction zones that are relatively young (Figure 1a;Hall, 1996;Hall and Spakman, 2015;Lai et al, 2021;Li et al, 2023). Examples include the Cotabato and Sulawesi subduction zones, which were initiated during the Pliocene or Late Miocene (Silver et al, 1983;Kopp et al, 1999;Schlüter et al, 2001) and have subduction slabs with a maximum depth in the middle of the trench and a gradual decrease in length along both sides (Figure 1c and 1d).…”

Section: Introductionmentioning

confidence: 99%

Subduction initiation at the corner of small oceanic basin

Dong,

Hao,

et al. 2023

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In Southeast Asia, emerging subduction zones often appear to begin at the corners of small oceanic basins, which have a triangular-indenter continent–ocean boundary geometry. To investigate the influence of a triangular indenter on subduction initiation, we performed a series of three-dimensional numerical simulations with varying indenter angles and base lengths. The results show that the apex of the indenter constitutes the initial location of subduction, irrespective of the angle or the extent of the indenter. Smaller angle indenters are more likely to facilitate subduction initiation. At the same time, wide acute angle indenters are difficult to form. Our findings suggest that triangular indenter structures may facilitate subduction initiation in smaller basins; however, the role such indenters in subduction initiation is limited in larger basins. Our results emphasize the importance of accounting for the three-dimensional geometry of a subduction zone when examining its subduction dynamics and geological features.

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