Guide Mantle flow and melt generation at mid-ocean ridges

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Contents

  1. dblackman's web site
  2. Professor Y Niu - Durham University
  3. Geophysical Constraints on Mantle Flow and Melt Generation Beneath Mid-Ocean Ridges

There are two processes, ridge-push and slab-pull, thought to be responsible for the spreading seen at mid-ocean ridges, and there is some uncertainty as to which is dominant. Ridge-push occurs when the weight of the ridge pushes the rest of the tectonic plate away from the ridge, often towards a subduction zone.

This is simply the weight of the tectonic plate being subducted pulled below the overlying plate dragging the rest of the plate along behind it. The other process proposed to contribute to the formation of new oceanic crust at mid-ocean ridges is the "mantle conveyor" see image. However, there have been some studies which have shown that the upper mantle asthenosphere is too plastic flexible to generate enough friction to pull the tectonic plate along.

Reference Terms.

dblackman's web site

At the subduction zone, "slab-pull" comes into effect. Related Stories. New research, however, shows plate dynamics are Specifically, it contributes to understanding how By applying a new analysis method, an international team of researchers has now discovered that the water can penetrate Seismic attenuation tomography of the Mariana subduction system: implications for thermal structure, volatile distribution, and slow spreading dynamics.

Buoyant melting instabilities beneath extending lithosphere.

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Numerical models John Hernlund , Paul J. Tackley , D Stevenson.

Professor Y Niu - Durham University

Modeling the seismic signature of structural data from the Oman Ophiolite: Can a mantle diapir be detected beneath the East Pacific Rise? Dunn , Douglas R. Kelemen , W. Steven Holbrook. References Publications referenced by this paper.

Geophysical Constraints on Mantle Flow and Melt Generation Beneath Mid-Ocean Ridges

Flow in deformable porous media. Part 1 Simple analysis Marc Spiegelman. Focused mantle upwelling beneath mid-ocean ridges: evidence from seamount formation and isostatic compensation of topography Douglas S.

Oceanic crustal thickness from seismic measurements and rare earth element inversions Robert S White , Doris Mckenzie , R. Oceanic crustal thickness versus spreading rate Yongshun John Chen.


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  • Magma generation and extraction beneath mid-ocean ridges and oceanic hotspots.

Seismological constraints on partial melting beneath the East Pacific Rise abstract. Melt extraction from the manfie beneath spreading centers. Sparks , E.

Melt migration in a 2D mid-ocean ridge model, computed with the Aspect code

A nonlinear rheology model for mid-ocean ridge axis topography Yongshun Chen , Wayne J. Solufion - precipatation enhanced diffusional creep of partial molten olivine - basalt aggregates during hot - pressing. Cooper , D.