Linking mantle upwelling with the lithosphere descent and the Japan Sea evolution: a hypothesis

Ismail‐Zadeh, Alik; Honda, Sawao; Tsepelev, Igor

doi:10.1038/srep01137

Cited by 28 publications

(16 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this “forward” approach we experimented with different initial settings for the rheology of the mantle, lithosphere, and continental margins and their geometry as a strategy to optimize the fit between predicted and observed slab position and morphology. This is different from “inverse” approaches in which the tomographic model is input to reconstruct the initial condition, i.e., the past [e.g., Liu and Gurnis , ; Ismail‐Zadeh et al ., ; Spasojević et al ., ]. Here we specifically conformed to the 3‐D geometry of the subduction zone at ~35 Ma as portrayed in, or derived from, a tectonic reconstruction to define the initial condition for 3‐D modeling and next predict the future.…”

Section: Introductionmentioning

confidence: 99%

“…The most crucial test is whether 35 My of subduction evolution, as qualitatively portrayed in each tectonic reconstruction, can predict the position and 3-D morphology of tomographically imaged slabs in the upper mantle of the region. To investigate this we employed 3-D the tomographic model is input to reconstruct the initial condition, i.e., the past [e.g., Liu and Gurnis, 2008;Ismail-Zadeh et al, 2012;Spasojević et al, 2009]. Here we specifically conformed to the 3-D geometry of the subduction zone at 35 Ma as portrayed in, or derived from, a tectonic reconstruction to define the initial condition for 3-D modeling and next predict the future.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Underpinning tectonic reconstructions of the western Mediterranean region with dynamic slab evolution from 3‐D numerical modeling

et al. 2014

View full text Add to dashboard Cite

No consensus exists on the tectonic evolution of the western Mediterranean since~35 Ma. Three disparate tectonic evolution scenarios are identified, each portraying slab rollback as the driving mechanism but with rollback starting from strongly different subduction geometries. As a critical test for the validity of each tectonic scenario we employ thermomechanical modeling of the 3-D subduction evolution. From each tectonic scenario we configure an initial condition for numerical modeling that mimics the perceived subduction geometry at~35 Ma. We seek to optimize the fit between observed and predicted slab morphology by varying the nonlinear viscoplastic rheology for mantle, slab, and continental margins. From a wide range of experiments we conclude that a tectonic scenario that starts from NW dipping subduction confined to the Balearic margin at 35 Ma is successful in predicting present-day slab morphology. The other two scenarios (initial subduction from Gibraltar to the Baleares and initial subduction under the African margin) lead to mantle structure much different from what is tomographically imaged. The preferred model predicts slab rotation by more than 180°, east-west lithosphere tearing along the north African margin and a resulting steep east dipping slab under the Gibraltar Strait. The preferred subduction model also meets the first-order temporal constraints corresponding to Mid-Miocene (~16 Ma) thrusting of the Kabylides onto the African margin and nearly stalled subduction under the Rif-Gibraltar-Betic arc since the Tortonian (~8 Ma). Our modeling also provides constraints on the rheological properties of the mantle and slab, and of continental margins in the region.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Underpinning tectonic reconstructions of the western Mediterranean region with dynamic slab evolution from 3‐D numerical modeling

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Although they assumed that the intrusion was related to the falling of megalith accumulated in the transition zone, the present model can be alternative. Their hot asthenosphere may have had come from the hot material in the subslab mantle under the Pacific plate through the gap[Ismail-Zadeh et al, 2013; also seeMorishige et al, 2010].…”

mentioning

confidence: 99%

Strength of slab inferred from the seismic tomography and geologic history around the Japanese Islands

Honda

2014

Geochem. Geophys. Geosyst.

Self Cite

View full text Add to dashboard Cite

I analyze the seismic tomography around the Japanese Islands to elucidate the present slab morphology. A simple conversion from the high speed to the temperature anomaly is done based on the recent study of the conversion coefficient from the velocity to the thermal anomaly and on the study of the relation between the seismicity and the temperature in the slab. I find recognizable amount of cold temperature anomalies under the subducting slab. This suggests a rather continuous slab throughout the mantle consistent with the results of many recent numerical models. However, there still is a gap in the slab or diluted slab under the transition zone. To understand this, I construct a simple half-kinematic model of subduction zone in which a Byerlee's type yield stress and the depth independent yield stress are assumed. Taking into account the geologic history around the Japanese Islands, I find that the slab morphology similar to the tomographic image is obtained when the yield stress is O(100 MPa). The present study shows that the detailed studies of seismic tomography and the tectonic history of the surveyed area can provide the constraints on the slab dynamics.

show abstract

“…Using a data assimilation method for mantle convection, Ismail‐Zadeh et al . [] suggested that the mantle upwelling plume under the Pacific plate partly penetrated through the subducting plate into the mantle wedge and generated smaller hot upwellings, which contributed to the rapid subsidence in the basins of the Japan Sea and to back‐arc spreading. During the plate stagnation, there is strong lateral flow perpendicular to the trench above the stagnant slab and beneath the overlaying plate (see the dashed red rectangle in Figure b).…”

Section: Discussionmentioning

confidence: 99%

The role of harzburgite layers in the morphology of subducting plates and the behavior of oceanic crustal layers

Yoshida

2013

Geophysical Research Letters

View full text Add to dashboard Cite

[1] Numerical simulations of mantle convection with semidynamic plate subduction in 3-D geometry is performed to investigate the role of harzburgite layers in the morphology of subducting plates and the behavior of oceanic crustal layers. The results show that a "buckled" crustal layer is observed under the "heel" of the stagnant slab that begins to penetrate into the lower mantle, regardless of the magnitude of the viscosity of the harzburgite layer, Δη hrz , when the factor of viscosity increase at the boundary of the upper and lower mantle, Δη lm , is larger than 60-100. As Δη hrz increases, the curvature of buckling is larger. When Δη lm and Δη hrz are larger, the volumes of crustal and harzburgite materials trapped in the mantle transition zone (MTZ) are also larger, although almost all of the materials penetrate into the lower mantle. These materials are trapped in the MTZ for over tens of millions of years. Citation: Yoshida, M. (2013), The role of harzburgite layers in the morphology of subducting plates and the behavior of oceanic crustal layers, Geophys. Res. Lett., 40,[5387][5388][5389][5390][5391][5392]

show abstract

Linking mantle upwelling with the lithosphere descent and the Japan Sea evolution: a hypothesis

Cited by 28 publications

References 61 publications

Underpinning tectonic reconstructions of the western Mediterranean region with dynamic slab evolution from 3‐D numerical modeling

Underpinning tectonic reconstructions of the western Mediterranean region with dynamic slab evolution from 3‐D numerical modeling

Strength of slab inferred from the seismic tomography and geologic history around the Japanese Islands

The role of harzburgite layers in the morphology of subducting plates and the behavior of oceanic crustal layers

Contact Info

Product

Resources

About