منابع مشابه
Viscosity jump in Earth's mid-mantle.
The viscosity structure of Earth's deep mantle affects the thermal evolution of Earth, the ascent of mantle plumes, settling of subducted oceanic lithosphere, and the mixing of compositional heterogeneities in the mantle. Based on a reanalysis of the long-wavelength nonhydrostatic geoid, we infer viscous layering of the mantle using a method that allows us to avoid a priori assumptions about it...
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This paper is concerned with the interpretation of isostatic recovery data in terms of the flow properties of the earth's mantle. A hydrodynamic analysis is first presented that allows straightforward calculation of the relaxation time for isostatic recovery within a mantle in which the viscosity varies continuously with depth. However, it transpires that no curve of this type (i.e., choice of ...
متن کاملMid-mantle heterogeneities associated with Izanagi plate: Implications for regional mantle viscosity
a r t i c l e i n f o a b s t r a c t Keywords: mid-mantle discontinuity subduction Izanagi plate viscosity We employed S-toP converted waveforms to detect mid-mantle scattering beneath northeastern China and the adjacent Japan Sea. Broadband and short-period waveforms recorded by seismic arrays for eight moderate-sized deep earthquakes were analyzed using a non-linear array stacking technique,...
متن کاملWhat have the Earths' Mantle & an Egyptian Mummy in Common?
This paper will start with an overview of the Manchester Visualization Centre (MVC), what we do, why we do it and who we do it to. The main elements of the paper will be to present four examples of our work: Visualization of Egyptian Mummy 1766, one of the Egyptian mummies belonging to the University Museum. We will explain what we did with the CT scan of this mummy, the special techniques that...
متن کاملFocused Mantle Upwelling below Mid-ocean Ridges Due to Feedback between Viscosity and Melting
We present the first internally consistent calculation which leads to a narrow 'conduit' of rapid vertical advection and melting of mantle under a spreading center. In this model, mantle flow is driven by plate separation and compositional buoyancy. Melt segregation is described as flow through a permeable media. The major new feature is that the viscosity of the mantle is considered to be a st...
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ژورنال
عنوان ژورنال: Science
سال: 2015
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aad1929