Variations in magmatism and the state of tectonic compensation of the Mariana subduction system

Li, Hongyu; Lin, Jian; Zhou, Zhiyuan; Zhang, Fan; Guo, Laiyin

doi:10.1111/ter.12557

Cited by 4 publications

(4 citation statements)

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“…The effect of mantle melting on anomalous bathymetry in back-arc basin settings has been extensively analyzed in geochemical studies (Woodhead et al, 1993;Taylor, 1995;Taylor and Martinez, 2003;Kelley et al, 2006;Mibe et al, 2011;Li et al, 2022), geophysical studies (Cross and Pilger, 1982;Sdrolias and Mueller, 2006;Kneller and van Keken, 2008;Long and Wirth, 2013;Balázs et al, 2022), and numerical simulations (Billen and Gurnis, 2001;Gerya and Yuen, 2003;Syracuse et al, 2010;Lee and Wada, 2017;Magni, 2019). Nonetheless, the density structure of the BABs mantle remains speculative.…”

Section: Crust-mantle Density Contrast and Mantle Temperaturementioning

confidence: 99%

“…The unknown pre-extension crustal structure complicates interpretations in all tectonic settings. A highly variable volume of magmatic additions to the crust during extension (Woodhead et al, 1993;Taylor et al, 1995;Charvis et al, 1995;Martinez and Taylor, 2002;Thybo and Artemieva, 2013;Magee et al, 2016;Liu et al, 2018;Buntin et al, 2021;Li et al, 2022) with possible abrupt short-wavelength changes (Dunn and Martinez, 2011) leads to further complications. Several crustal types may exist in back-arc basins, depending on tectonic setting and extension history, since not all backarc basins evolve from rifting to seafloor spreading (Tables 1, 2), and many formed on oceanic lithosphere of the overriding oceanic plate.…”

Section: Crustal Types In Babsmentioning

confidence: 99%

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Back-arc basins: A global view from geophysical synthesis and analysis

Artemieva

2023

Preprint

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<p>This global study of 31 off-shore back-arc basins (BABs) identifies their principal characteristics based on a broad spectrum of geophysical and subduction-related parameters. My synthesis is used to identify trends in the evolution of BABs for improving our understanding of subduction systems in general. The analysis, based on the present plate configuration, demonstrates that geophysical characteristics and fate of the BABs are essentially controlled by the tectonic type of the overriding plate, which controls the lithosphere thermo-compositional structure and rheology. The type of the plate governs the length of the extensional zone in back-arc settings along the trench, the efficiency of lithosphere stretching, and the crustal structure, buoyancy and bathymetry of the BABs. Subduction dip angle apparently controls the location of the slab melting zone and the efficiency of slab roll-back with feedback links to other parameters. By the tectonic nature of the overriding plate (the downgoing plate is always oceanic) the back-arc basins are split into active BABs formed by ocean-ocean, arc-ocean, and continent-ocean convergence, and extinct back-arc basins. By geophysical characteristics, BABs formed on continental plates are subdivided into active BABs with and without seafloor spreading, and extinct BABs are subdivided into the Pacific BABs, possibly formed on oceanic plates, and the non-Pacific BABs with reworked continental or arc fragments. Six types of BABs are distinctly different. Extension of the overriding oceanic plate above a steeply dipping old oceanic plate, preferentially subducting nearly westwards, forms large deep back-arc basins with a thin oceanic- type crust. In contrast, BABs on the overriding continental or arc plates form at small opening rates and often by shallow subduction of younger oceanic plates with a random subduction orientation; these BABs have small sizes, shallow bathymetry, and hyperextended or transitional ~20 km thick arc- or continental-type crust typical of passive margins. The presence of a 2&#8211;5 km thick high-Vp lowermost crustal layer, characteristic of BABs in all settings, indicates the importance of magmatic underplating in the crustal growth. Conditions required for the initiation of a back-arc basin and transition from stretching to seafloor opening depend on the nature of the overriding plate. BABs formed on oceanic plates always evolve to seafloor spreading. BABs formed on continental or arc plates require long spreading duration with large (>8 cm/y) opening rates and a large crustal thinning factor of 2.8&#8211;5.0 to progress from crustal extension to seafloor spreading. On the present Earth such transition does not happen in the BABs formed behind a shallow subduction (<45o) of a young (<40 My) oceanic plate. The nature of the overriding plate also determines the fate of back-arc basins after termination of lithosphere extension: the extinct Pacific BABs with oceanic-type crust evolve towards deep old &#8220;normal&#8221; oceans, while the shallow non-Pacific BABs with low heat flow and thick crust are likely to preserve their continental or arc affinity. BABs do not follow the oceanic cooling plate model predictions. Distinctly different geophysical signatures for mid-ocean ridge spreading and for back-arc seafloor spreading are caused by principally different dynamics. https://doi.org/10.1016/j.earscirev.2022.104242</p>

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Section: Crust-mantle Density Contrast and Mantle Temperaturementioning

confidence: 99%

Section: Crustal Types In Babsmentioning

confidence: 99%

Back-arc basins: A global view from geophysical synthesis and analysis

Artemieva

2023

Preprint

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“…At approximately 43 Ma, the Pacific Plate suddenly changed its direction from northwards to westwards, and true subduction began (Richards & Lithgow‐Bertelloni, 1996). Many scholars believe that from the beginning of subduction to 30 Ma, the morphology of the IBM arc and the subduction structure remained relatively stable (Ishizuka et al., 2018; Li et al., 2021; Taylor, 1992). At approximately 25 Ma, the ocean floor of the Parece Vela Basin began to spread northwards and southwards, forming the Shikoku Basin at the northern end of the IBM arc.…”

Section: Tectonic Settingsmentioning

confidence: 99%

“…At the same time, the subduction process, mechanism and effect of the Mariana subduction system, as a typical example of an extensional subduction model (Karig, 1971a, 1971b; Ueda Seiya & Jin, 1984), have long been popular research topics. Previous studies on the Mariana structure and subduction process have focused mostly on large‐scale subduction zone types (Bibee et al, 1980; Hall, 2002; Li et al., 2014; Zang & Ning, 1996), coupled plate characteristics (Erica et al., 2014; Takahashi et al., 2007, 2008), mantle wedge convection structures (Barklage et al., 2015; Pozgay et al., 2013), segmentation of subduction structures (Ribeiro et al., 2022; Takahashi & Saito, 2010), material migration and transformation (Ribeiro et al., 2019; Taira et al., 1998), earthquake activity (Fryer, 1996; Hajime et al., 2010) and magma processes (Kelley et al., 2010; Li et al., 2021; Wlki et al., 2018). However, relatively few studies have been performed on the tectonic migrations revealed by small‐ to medium‐scale depocentre transitions and fault transitions in oceanic sedimentary layers, and the structural and sedimentary evolution processes of Cenozoic intraplate basins are closely related to the evolution of the subduction systems.…”

Section: Introductionmentioning

confidence: 99%

Multichannel seismic evidence for tectonic migration in the Mariana subduction system

Li,

Zhang,

Wang

et al. 2023

Geophysical Prospecting

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The Mariana subduction system is an ideal place for ocean–ocean convergence boundary research. As a typical example of an extensional subduction model, the subduction process, subduction mechanism and subduction effect of this system have long been popular research topics. The seismic reflection information of oceanic sedimentary layers shown on multichannel seismic profiles is an intuitive record of small‐ to medium‐scale structural activity and sedimentary sequence evolution and is an important source for studying plate‐coupling processes and tectonic dynamic action. This paper is based on the raw multichannel seismic data of MGL1204 in the Mariana arc forearc region; these data were obtained by using linear interference filter technique noise attenuation technology and multiple velocity iterations to accurately image the oceanic sedimentary layer, and the imagery is used to study the Cenozoic fracture activity and residual strata thickness distribution characteristics of the middle part of the Mariana forearc region and to explore the tectonic migration characteristics of the Cenozoic sedimentary basins. We believe that due to the influence of regional stress field changes caused by the movement directions of the Pacific Plate and Philippine Sea Plate towards the Eurasian Plate, the development of secondary structures in the western Pacific subduction zone shows a characteristic west‐to‐east migration, and the structural characteristics of the Mariana forearc Cenozoic sedimentary basin are consistent with the regional tectonic features. The faults, stratigraphy and depocentres of the oceanic sedimentary layer show a migration pattern from west to east and from north to south overall; 25 and 13 Ma are identified as two key tectonic migration periods, and the tectonic migration characteristics and time records of the basin also provide direct evidence for the plate reconstruction model of trench retreat and Philippine Sea plate rotation.

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Back-arc basins: A global view from geophysical synthesis and analysis

Artemieva

2023

Earth-Science Reviews

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Variations in magmatism and the state of tectonic compensation of the Mariana subduction system

Cited by 4 publications

References 44 publications

Back-arc basins: A global view from geophysical synthesis and analysis

Back-arc basins: A global view from geophysical synthesis and analysis

Multichannel seismic evidence for tectonic migration in the Mariana subduction system

Back-arc basins: A global view from geophysical synthesis and analysis

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