Styles of Trench‐Parallel Mid‐Ocean Ridge Subduction Affect Cenozoic Geological Evolution in Circum‐Pacific Continental Margins

Wu, Yinong; Liao, Jie; Guo, Feng; Wang, Xuan‐Ce; Shen, Yongqiang

doi:10.1029/2022gl098428

Cited by 6 publications

(4 citation statements)

References 102 publications

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“…The age of the Pacific lithosphere then rapidly increases to reach 120 Ma at the right domain boundary, consistently with plate reconstruction models 24 , 57 , 89 – 91 . Although several authors examined the eastern margin of the Eurasia plate using numerical modelling tools, plate velocity variability according to plate motion reconstructions remains generally poorly investigated in geodynamic modelling 43 , 92 – 95 .…”

Section: Methodsmentioning

confidence: 99%

Variable plate kinematics promotes changes in back-arc deformation regime along the north-eastern Eurasia plate boundary

Ficini,

Cuffaro,

Doglioni

et al. 2024

Sci Rep

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The stretching of the lithosphere leading to back-arc basins formation generally develops behind arc-trench systems and is considered the consequence of slab retreat relative to the upper plate. Here, we examine the deformation regime evolution within the overriding plate due to subduction processes, using thermo-mechanical numerical simulations. We explore the north-eastern Eurasia plate boundary and the mechanisms of subducting Pacific plate since 57 Ma. During this time interval, several extensional basins formed along the Eurasia margin, such as the East China Sea, the Japan Sea, and the Kuril basin. Here, we increased the simulation complexity, with the inclusion of (i) the kinematic variability of the Pacific plate over the geological past with respect to a fixed Eurasia, incorporating time-dependent (i.e., temporally evolving) velocities computed from plate motion reconstructions; (ii) a Low-Velocity Zone within the asthenosphere, and (iii) a horizontal eastward mantle flow. Our results show a crucial role of the mantle flow for the development of lithospheric extension and back-arc basin opening, and a main kinematic control of the subduction trench position, which advances and retreats, into distance intervals in the order of $$\sim$$ ∼ 100 km, and providing stages of compression and extension in a back-arc basin.

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Section: Methodsmentioning

confidence: 99%

Variable plate kinematics promotes changes in back-arc deformation regime along the north-eastern Eurasia plate boundary

Ficini,

Cuffaro,

Doglioni

et al. 2024

Sci Rep

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“…However, the Nazca Plate has been subducting along the western margin of the South American Plate for more than 200 Myrs (Isacks 1988;Allmendinger and Gubbels, 1996;Sobolev and Babeyko, 2005). This long history of subduction has caused a migration of aqueous fluids from the subducting Nazca plate, which may weaken the localized mantle lithosphere under the central Andes (Jing et al, 2020;Contreras-Reyes and Diaz, 2021;Wu et al, 2022). Geochemical constraints and geophysical data indicate a small-scale removal of the mantle lithosphere under the central Andes, with a pattern of melting in accordance with the process of small-scale foundering/dripping (<50 km diameter) of the thickened mantle lithosphere in the Altiplano-Puna Plateau, where mafic volcanic regions on the plateau manifest individual dripping (Drew et al, 2009;Ducea et al, 2013).…”

Section: Central Andesmentioning

confidence: 99%

Patched removal of the mantle lithosphere under orogens: A systematic numerical study

Tian

Liao

et al. 2023

Front. Earth Sci.

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Delamination or convective thinning could cause large-scale and complete removal of the mantle lithosphere under orogens. However, geological and geophysical observations suggest that patched removal of the mantle lithosphere has occurred in some orogens, such as the northeastern Tibetan Plateau, the central Tianshan, and the central Andes. Dislocation-creep-induced strain localization cannot promote effective removal of the mantle lithosphere to the Moho on a small-scale. Recent rheological studies propose that dislocation-accommodated grain boundary sliding (DisGBS) may dominate upper mantle deformation. DisGBS could make the lower lithospheric mantle rheologically weaker than dry olivine. With 2-D high-resolution thermo-mechanical modeling, we systematically investigated the conditions for the initiation of small-scale lithospheric thinning under orogens and explored the minimum range of removal of the mantle lithosphere. The numerical results indicate that classic convective drip cannot effectively thin the mantle lithosphere to the Moho on a small-scale. In contrast, small-scale thinning can be induced by lithospheric heterogeneity with DisGBS and plasticity. The rheological heterogeneity can be verified by magmatism and metasomatism under the central Andes and orogens between terranes under the northeastern Tibetan Plateau or in Tianshan.

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“…10 million years to migrate from 54° S to its present location at 46° S. The ridge began to subduct at the southern latitude at 18–16 Ma, whereas it moved northward, reaching its present position, at 8–6 Ma (Breitsprecher & Thorkelson, 2009). The slab window migration has been associated with a slab flattening (Wu et al., 2022), which might have influenced the thrust evolution and the dynamic topography at the surface. The southernmost Patagonia has also been affected by the opening of the Drake passage and creation of the Scotia plate since the Eocene and Oligocene, respectively (Barker, 2001; Eagles & Jokat, 2014; Maldonado et al., 2014), as well as the development of a major continental transform zone (Magallanes‐Fagnano fault system) between 9 and 7 Ma (Lodolo et al., 2003).…”

Section: Introductionmentioning

confidence: 99%

Cenozoic subsidence‐driving mechanisms in the southernmost Patagonian basins of Tierra del Fuego and SW Atlantic

Dávila,

Ding

2023

Basin Research

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Foreland basins are ideal laboratories to examine and quantify forces that contribute to Earth's topography. The interaction of these driving mechanisms (atmospheric, lithospheric and asthenospheric) affects the accumulation and preservation of strata in marine or terrestrial depocentres. For foreland basins that cover thousands of kilometres along orogens, geodynamic processes or lithospheric structure might differ and/or overlap differently along or across strike. The Magallanes‐Austral basin in the southernmost Patagonia serves as a good analogue to analyse the interactions between subcrustal forces and foreland sedimentation. While to the northern part of southern Patagonia, Cenozoic basins were predominantly terrigenous and above sea level; at the southernmost end of Patagonia, sedimentation in the island of Tierra del Fuego was mostly submarine. We analysed in this contribution the southernmost foreland of Patagonia by combining backstripping with reconstruction of flexural and dynamic subsidence. These results were compared with terrestrial records exposed further north of southern Patagonia. We found that, in addition to crustal contributions (as deformation and sedimentation), subcrustal forces are required to accommodate the proximal and distal foreland strata and explain the palaeoenvironmental and subsidence discrepancies that resulted after our analysis. When our models are compared with dynamic topographic curves, strong correlations are observed during the Palaeogene, whereas strong topographic differences occurred in the Neogene. Dynamic topography models in the Neogene have reproduced clear uplift, whereas our residual topography results show equilibrium (close to the orogen) to subsidence values (to the distal foreland). We propose that changes in the lithospheric mantle had to work together with the rest of the tectonics and dynamic forces to match 1‐D backstripping and flexural curves. This suggests that foreland basins in southern Patagonia were controlled differently along strike the southern Andes and that crustal deformation, asthenospheric flows and a heterogeneous lithospheric mantle structure affected the Cenozoic basin evolution.

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Styles of Trench‐Parallel Mid‐Ocean Ridge Subduction Affect Cenozoic Geological Evolution in Circum‐Pacific Continental Margins

Cited by 6 publications

References 102 publications

Variable plate kinematics promotes changes in back-arc deformation regime along the north-eastern Eurasia plate boundary

Variable plate kinematics promotes changes in back-arc deformation regime along the north-eastern Eurasia plate boundary

Patched removal of the mantle lithosphere under orogens: A systematic numerical study

Cenozoic subsidence‐driving mechanisms in the southernmost Patagonian basins of Tierra del Fuego and SW Atlantic

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