scholarly journals Mantle upwelling, melt generation, and magma transport beneath mid-ocean ridges

1997 ◽  
Author(s):  
Laura S. Magde
Keyword(s):  
Mantle Upwelling ◽  
Ocean Ridges ◽  
Magma Transport ◽  
Melt Generation

Magma transport beneath mid-ocean ridges

2021 ◽  
Author(s):  
Shi Sim ◽  
Marc Spiegelman ◽  
Dave Stegman ◽  
Cian Wilson
Keyword(s):  
Temporal Variations ◽  
Spreading Rate ◽  
Two Phase ◽  
Long Period ◽  
Ocean Ridges ◽  
Magma Transport ◽  
Southeast Indian Ridge ◽  
Melt Transport ◽  
Phase Models ◽  
Numerical Explorations

<p>Melt transport beneath the lithosphere is elusive. With a distinct viscosity and density from the surrounding mantle, magmatic melt moves on a different time scale as the surrounding mantle. To resolve the temporal scale necessary to accurately capture melt transport in the mantle, the model simulations become numerically expensive quickly. Recent computational advances make possible two-phase numerical explorations to understand magma transport in the mantle. We review results from a suite of two-phase models applied to the mid-ocean ridges, where we varied half-spreading rate and intrinsic mantle permeability using new openly available models, with the goal of understanding melt focusing beneath mid-ocean ridges and its relevance to the lithosphere-asthenosphere boundary (LAB). Here, we highlight the importance of viscosities for the melt focusing mechanisms. In addition, magmatic porosity waves that are a natural consequence of these two-phase flow formulations. We show that these waves could explain long-period temporal variations in the seafloor bathymetry at the Southeast Indian Ridge.</p>

scholarly journals Geodynamic Models of Melt Generation and Extraction at Mid-Ocean Ridges

Oceanography ◽  
2012 ◽  
Vol 25 (1) ◽  
pp. 78-88 ◽  
Author(s):  
Patricia Gregg ◽  
Laura Hebert ◽  
Laurent Montési ◽  
Richard Katz
Keyword(s):  
Ocean Ridges ◽  
Melt Generation ◽  
Geodynamic Models
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