Subduction Initiation at the Solomon Back‐Arc Basin: Contributions From Both Island Arc Rheological Strength and Oceanic Plateau Collision

Wang, Liangliang; Dai, Liming; Gong, Wei; Li, Sanzhong; Jiang, Xiaodian; Foulger, G. R.; Huang, Dong; Li, Zhong‐Hai; Yu, Shengyao

doi:10.1029/2021gl097666

Cited by 19 publications

(34 citation statements)

References 73 publications

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“…(2022) and the 2‐D SPR numerical simulation of the Solomon back‐arc basin by Wang et al. (2022). The continent‐continent collision‐induced SPR in northern Borneo sets it apart from observations and numerical models of arc‐continent and arc‐plateau collision (e.g., Almeida et al., 2022; Gasser et al., 2022; Hagke et al., 2016; Stern & Gerya, 2018; Wang et al., 2022) in several ways, including localized back‐arc rifting of continental crust and a more substantial mountain range.…”

Section: Discussionmentioning

confidence: 99%

Collision‐Induced Subduction Polarity Reversal Explains the Crustal Structure of Northern Borneo: New Results From Virtual Deep Seismic Sounding (VDSS)

Linang

Pilia

Tongkul

et al. 2022

Geophysical Research Letters

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Subduction polarity reversal (SPR) is a key subduction initiation mechanism often associated with arc‐continent collision zones. Northern Borneo has long been recognized as a location where sequential but opposing subduction zones were present in the Miocene, but has not been examined in the context of SPR. Here, we exploit teleseismic data from northern Borneo to investigate crustal thickness variations using Virtual Deep Seismic Sounding (VDSS). Our results reveal a thick crustal root beneath the Crocker Range and an area of relatively thin crust in the southeast, which appears to extend northeast into the Sulu Sea, where back‐arc rifting behind the younger subduction zone developed. Overall, our findings are consistent with predictions from numerical models of SPR involving arc‐continent collision, but with several important differences—including a substantial mountain range and more limited back‐arc rifting that can be attributed to northern Borneo being an example of SPR involving continent‐continent collision.

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Section: Discussionmentioning

confidence: 99%

Collision‐Induced Subduction Polarity Reversal Explains the Crustal Structure of Northern Borneo: New Results From Virtual Deep Seismic Sounding (VDSS)

Linang

Pilia

Tongkul

et al. 2022

Geophysical Research Letters

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“…The above models are 20 km thick and 100-200 km wide (small to moderate-size) bathymetric highs, consistent with the average thickness of global thin continental fragments/oceanic plateaus. Recent numerical modeling studies test small to large-size oceanic plateaus (Tao et al, 2020;Yan et al, 2021;Almeida et al, 2022;Wang et al, 2022) to investigate how buoyant plateaus contribute to dip angle change, subduction polarity reversal, and subduction zone jumping. Previous analogue models investigate the effects of seamount subduction on the structural deformation of the accretionary wedge, especially the evolution of faults in the wedge (Dominguez et al, 1998(Dominguez et al, , 2000Li F. C. et al, 2013;Wang et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Bathymetric Highs Control the Along-Strike Variations of the Manila Trench: 2D Numerical Modeling

Chen

Cheng

et al. 2022

Front. Earth Sci.

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The Manila Trench is located at the eastern boundary of the South China Sea (SCS). It develops through the subduction of the SCS beneath the Philippine Sea Plate (PSP) since the early Neogene, driven by the northwestern plate motion of the PSP. The northern segment of the Manila trench at around 18° N—21.5°N is characterized by an obvious eastward convex in the trench shape and abrupt changes of slab dip angle, whereas the southern segment of the Manila trench at around 15°N—18°N is featured by an almost straight NS-trending trench line and smooth subducting slab morphology. However, the cause for the along-strike variations along the Manila trench remains poorly understood. In this study, we use 2-D thermo-mechanical modeling to investigate how bathymetric highs embedded in the subducting slab affect the topography of overriding plate and the morphology of subducting plate. Three major factors of bathymetric highs are systematically examined: 1) the crustal properties, 2) the width, and 3) the thickness. Geodynamic results suggest that the most important factor controlling abrupt changes in dipping angle is the crustal properties of bathymetric highs. Also, reduction of crustal thickness and increasing the width of continental bathymetric highs favor the abrupt change of dipping angle, whereas thicker (≥25 km) bathymetric highs are more likely to be blocked in the subduction zone before slab break-off. According to our numerical modeling results, we suggest that dramatic changes in the dip angle in the northern Manila trench and the convex shape were caused by subduction of a large thin continental terrane, whereas the smooth morphology of subducting slab in the southern segment and straight trench were associated with normal oceanic subduction with small seamounts.

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“…The Cretaceous Colombian-Caribbean oceanic plateau was partially obducted against the South American continent (Kerr et al, 1998). The Ontong Java Plateau in the southwestern Pacific is currently colliding on the Solomon arc (Almeida et al, 2022;Mann & Taira, 2004; L. L. Wang, Dai, et al, 2022). Actually, many other areas in Alaska, southwestern Canada, Tibet, Taiwan, and NE Asia are also believed to have been formed by extensive allochthonous terranes accretion along its active margin (e.g., Cook et al, 2004;Greene, Scoates, & Weis, 2008;Mesalles et al, 2014;K.…”

Section: Continental Crust Accretionmentioning

confidence: 99%

“…S1 and S2 mark flat-slab segments plateaus, submarine ridges, and seamounts are mafic igneous regions with a crust that is thicker and much more buoyant than the surrounding oceanic crust, they often resist subduction and thus results in subduction polarity reversal (Figure 7e), and the formation of a new subduction zone behind the accreted terrain (Arrial & Billen, 2013;Cloos, 1993;Kerr & Mahoney, 2007;B. Sun, Kaus, et al, 2021;L. L. Wang, Dai, et al, 2022;G.…”

Section: Trigger Of Subduction Initiationmentioning

confidence: 99%

“…F I G U R E 7 Cartoon schematics of in subduction zones for four accretionary processes, including (a) accretion in the accretionary prism, (b) underplating beneath the overriding plate, (c) obducting onto the overriding plate, and (d) collision (Tetreault & Buiter, 2014); (e) Oceanic plateau collision-induced subduction initiation (Almeida, Riel, Rosas, Duarte, & Schellart, 2022;Mann & Taira, 2004;B. Sun, Kaus, et al, 2021;L. L. Wang, Dai, et al, 2022); (f) Model of Archean continental crustal growth with reworking of the accreted plateau crust by later subduction magmatism (Polat, Kerrich, & Windley, 2009;Sanislav, Blenkinsop, & Dirks, 2017) F I G U R E 8 (a) Tectonic reconstructions of the Ontong Java Plateau and Solomon island arc convergence zone at Early Pliocene, showing subduction polarity reversal (Mann & Taira, 2004); (b) Map showing the locations of accreted oceanic plateau fragments around the Caribbean and in northwestern South America (Kerr & Mahoney, 2007)…”

Section: Trigger Of Subduction Initiationmentioning

confidence: 99%

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The effect of seamount chain subduction and accretion

Yang

Tong

et al. 2022

Geological Journal

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Seamount chains (oceanic plateaus, submarine ridges) are unique morphologic features on the seafloor, which resulted from the motion of the lithosphere over a convective plume. Seamount chains are being carried along by plate motions, which are eventually subducted beneath continental/oceanic plates or accreted in the accretionary complex, thus causing a series of effects in the convergent margin. In this paper, we briefly review the distribution and features of the typical modern seamount chains, including Hawaiian‐Emperor and Louisville seamount chains, Cocos, Ninetyeast and Caroline ridges, and Ogasawara Plateau, and mainly focus on the effects of seamount chains subduction and accretion. The geological effects mainly include the following: (1) deformation and tectonic erosion of the overriding plate; (2) flat‐slab subduction in the convergent margin; (3) growth of continental crust through time; (4) subduction initiation of plate tectonics; (5) generation of large earthquakes; (6) magmatism of the volcanic arc; and (7) formation of porphyry copper and gold deposits. The subduction of seamount chains resulted in similar effects in the Central Asian Orogenic Belt (CAOB) which is one of the largest and longest‐lived accretionary orogens on Earth. However, there are still many aspects that need further improvements, such as identification of the seamounts in the geological record, and geodynamic effects of subducted seamount chains. A detailed study on these sides of the seamount chains will enable us to further understand the tectonic evolution and metallogenesis of the CAOB, especially in accretionary orogenesis, continental crust growth, and subduction initiation dynamics.

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Subduction Initiation at the Solomon Back‐Arc Basin: Contributions From Both Island Arc Rheological Strength and Oceanic Plateau Collision

Abstract: Subduction initiation (SI) is key to study the evolution of the solid Earth and has profound implications for plate motion (

Cited by 19 publications

References 73 publications

Collision‐Induced Subduction Polarity Reversal Explains the Crustal Structure of Northern Borneo: New Results From Virtual Deep Seismic Sounding (VDSS)

Collision‐Induced Subduction Polarity Reversal Explains the Crustal Structure of Northern Borneo: New Results From Virtual Deep Seismic Sounding (VDSS)

Bathymetric Highs Control the Along-Strike Variations of the Manila Trench: 2D Numerical Modeling

The effect of seamount chain subduction and accretion

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