Crustal thickness beneath Central and East Java (Indonesia) inferred from P receiver functions

Abstract. A key element of plate tectonics on Earth is that the lithosphere is subducting into the mantle. Subduction results from forces that bend and pull the lithosphere into the interior of the Earth. Once subducted, lithospheric slabs are further modified by dynamic forces in the mantle, and their sinking is inhibited by the increase in viscosity of the lower mantle. These forces are resisted by the material strength of the lithosphere. Using geodynamic models, we investigate several subduction models, wherein we control material strength by setting a maximum viscosity for the surface plates and the subducted slabs independently. We find that models characterized by a dichotomy of lithosphere strengths produce a spectrum of results that are comparable to interpretations of observations of subduction on Earth. These models have strong lithospheric plates at the surface, which promotes Earth-like single-sided subduction. At the same time, these models have weakened lithospheric subducted slabs which can more easily bend to either lie flat or fold into a slab pile atop the lower mantle, reproducing the spectrum of slab morphologies that have been interpreted from images of seismic tomography.

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10.5194/se-8-339-2017

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S receiver function analysis of the crustal and lithospheric structures beneath eastern Tibet

Earth and Planetary Science Letters (2011)

Jiafu Hu Xingqian Xu Haiyan Yang Limin Wen Guangquan Li

Receiver function

Asthenosphere

Lithospheric flexure

10.1016/j.epsl.2011.03.034

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Plume‐Induced Subduction Initiation: Single‐Slab or Multi‐Slab Subduction?

Geochemistry Geophysics Geosystems (2020)

Marzieh Baes S. V. Sobolev Taras Gerya Sascha Brune

Abstract Initiation of subduction following the impingement of a hot buoyant mantle plume is one of the few scenarios that allow breaking the lithosphere and recycling a stagnant lid without requiring any preexisting weak zones. Here, we investigate factors controlling the number and shape of retreating subducting slabs formed by plume‐lithosphere interaction. Using 3‐D thermomechanical models we show that the deformation regime, which defines formation of single‐slab or multi‐slab subduction, depends on several parameters such as age of oceanic lithosphere, thickness of the crust and large‐scale lithospheric extension rate. Our model results indicate that on present‐day Earth multi‐slab plume‐induced subduction is initiated only if the oceanic lithosphere is relatively young (<30–40 Myr, but >10 Myr), and the crust has a typical thickness of 8 km. In turn, development of single‐slab subduction is facilitated by older lithosphere and pre‐imposed extensional stresses. In early Earth, plume‐lithosphere interaction could have led to formation of either episodic short‐lived circular subduction when the oceanic lithosphere was young or to multi‐slab subduction when the lithosphere was old.

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10.1029/2019gc008663

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Citations (45)

Lithospheric structure variations between the eastern and central North China Craton from S- and P-receiver function migration

Physics of The Earth and Planetary Interiors (2008)

Ling Chen

Receiver function

Classification of discontinuities

Lineament

10.1016/j.pepi.2008.11.011

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Citations (161)

Water content in the early Cretaceous lithospheric mantle beneath the south-central Taihang Mountains： implications for the destruction of the North China Craton

中国科学通报：英文版 (2014)

Shaochen Liu Qunke Xia

在北方中国 Craton ( NCC )的东方部分基于早白垩纪 Feixian 高镁的暗岩的水内容的研究，东方 NCC 的早白垩纪 lithospheric 披风是高度含水的，这被建议了(> 1,000 ppm ， H2O wt )并且这个高水位线内容显著地减少了 lithospheric 披风的粘性并且为 NCC 的破坏提供了一个前提。向北， NCC 的东方部分从南方经历了海洋的盘子的多级式的 subduction，东方后来站在一起早古生代，并且这些事件可能引起了 NCC lithospheric 披风的强壮的水和。决定哪个 subduction 最作出贡献到这水和，我们测量了 Fushan 的早白垩纪高镁的闪长岩在 Taihang 山的南方中央的部分招待的橄榄岩捕虏体的水内容。我们的结果证明在 Taihang 山的南方部分下面的早白垩纪 lithospheric 披风的水内容是 ~ 40 ppm 并且比在 NCC 的东方部分下面的当代的 lithospheric 披风的显著地低。因此， NCC 的东方部分的早白垩纪 lithospheric 披风的水和能从西方方面被归功于到和平的板的 subduction。因此，在 NCC 的破坏的主要动态因素是可能的和平的板的 subduction。

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Plume-induced subduction initiation: single- or multi-slab subduction?

EGU General Assembly Conference Abstracts (2020)

Marzieh Baes S. V. Sobolev Taras Gerya Sascha Brune

Initiation of subduction following the impingement of a hot buoyant mantle plume is one of the few scenarios that allow breaking the lithosphere and recycling a stagnant lid without requiring any preexisting weak zones. Here, we investigate factors controlling the number and shape of retreating subducting slabs formed by plume-lithosphere interaction. Using 3-D thermomechanical models we show that the deformation regime, which defines formation of single-slab or multi-slab subduction, depends on several parameters such as age of oceanic lithosphere, thickness of the crust and large-scale lithospheric extension rate. Our model results indicate that on present-day Earth multi-slab plume-induced subduction is initiated only if the oceanic lithosphere is relatively young ( 10 Myr), and the crust has a typical thickness of 8 km. In turn, development of single-slab subduction is facilitated by older lithosphere and pre-imposed extensional stresses. In early Earth, plume-lithosphere interaction could have led to formation of either episodic short-lived circular subduction when the oceanic lithosphere was young or to multi-slab subduction when the lithosphere was old.

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10.25932/publishup-52274

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Plate motion and plume-induced subduction initiation

Gondwana Research (2021)

Marzieh Baes S. V. Sobolev Taras Gerya Robert J. Stern Sascha Brune

Mantle plume

Eclogitization

10.1016/j.gr.2021.06.007

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Citations (9)