2-D Numerical Simulations on Formation and Descent of Stagnant Slabs

A numerical model of subducted slabs in the convecting mantle using 2-D model in spherical annulus, in order to study what mechanisms control the behaviors of subducted slabs in the mantle at various depths, such as the formation of stagnant slabs in the MTZ and the course of its avalanche into the lower mantle. (According to Mana Tsuchida and Masanori Kameyama)

Seismic tomographynumerical model
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contributed at 2019-06-24

Authorship

Affiliation:  
Geodynamics Research Center, Ehime University, Matsuyama, Japan
Email:  
tsuchida@sci.ehime-u.ac.jp
Affiliation:  
Geodynamics Research Center, Ehime University, Matsuyama, Japan
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Application-focused categoriesNatural-perspectiveSolid-earth regions

Model Description

English {{currentDetailLanguage}} English

Quoted from: https://doi.org/10.3389/feart.2020.00117

Authors consider thermal convection of mantle materials which is driven by a subducting and retreating motion of a cold slab in one eighth (azimuth θmin ≤ θ ≤ θmax where θmax-θmin=45∘) of a two-dimensional spherical annulus whose outer and inner radii are rmax = 6, 400 km and rmin = 4, 400 km, respectively. Authors take into account the effects of the phase transition from olivine to wadsleyite at around 410 km depth and that from ringwoodite to bridgmanite and ferro-periclase at around 660 km depth. The density contrasts associated with these phase transitions are taken to be 8.3 and 7.8%, respectively (Dziewonski and Anderson, 1981). The Clapeyron slope of the phase transition at 410 km depth is taken to be γ410 = +3 MPa/K, while that of 660 km depth γ660 is varied from −3 MPa/K or −1 MPa/K, based on the result of laboratory experiments (e.g., Ito and Takahashi, 1989Katsura et al., 2003Fei et al., 2004). The meanings and values of parameters used in this study are given in Table 1.

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How to Cite

Mana Tsuchida, Masanori Kameyama (2019). 2-D Numerical Simulations on Formation and Descent of Stagnant Slabs, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/affd7176-8b7e-4106-99ad-162ed811e7a5
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Contributor(s)

Initial contribute: 2019-06-24

Authorship

Affiliation:  
Geodynamics Research Center, Ehime University, Matsuyama, Japan
Email:  
tsuchida@sci.ehime-u.ac.jp
Affiliation:  
Geodynamics Research Center, Ehime University, Matsuyama, Japan
Is authorship not correct? Feedback

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