scholarly journals Mantle flow and melting underneath oblique and ultraslow mid-ocean ridges

2007 ◽  
Vol 34 (24) ◽  
Author(s):  
Laurent G. J. Montési ◽  
Mark D. Behn
Keyword(s):  
Mantle Flow ◽  
Ocean Ridges

Buoyancy effects on mantle flow under Mid-Ocean Ridges

1993 ◽  
Vol 98 (B7) ◽  
pp. 12191-12205 ◽  
Author(s):  
Wusi Su ◽  
W. Roger Buck
Keyword(s):  
Mantle Flow ◽  
Ocean Ridges

Three-dimensional mantle flow beneath mid-ocean ridges

1993 ◽  
Vol 98 (B5) ◽  
pp. 7851-7869 ◽  
Author(s):  
M. Rabinowicz ◽  
S. Rouzo ◽  
J.-C. Sempere ◽  
C. Rosemberg
Keyword(s):  
Three Dimensional ◽  
Mantle Flow ◽  
Ocean Ridges

scholarly journals Kinematics and dynamics of the East Pacific Rise linked to a stable, deep-mantle upwelling

2016 ◽  
Vol 2 (12) ◽  
pp. e1601107 ◽  
Author(s):  
David B. Rowley ◽  
Alessandro M. Forte ◽  
Christopher J. Rowan ◽  
Petar Glišović ◽  
Robert Moucha ◽  
...  
Keyword(s):  
East Pacific Rise ◽  
Oceanic Lithosphere ◽  
Plate Motion ◽  
Mantle Flow ◽  
Plate Boundaries ◽  
Tectonic Plates ◽  
Ocean Ridges ◽  
East Pacific ◽  
The Pacific ◽  
Negative Buoyancy

Earth’s tectonic plates are generally considered to be driven largely by negative buoyancy associated with subduction of oceanic lithosphere. In this context, mid-ocean ridges (MORs) are passive plate boundaries whose divergence accommodates flow driven by subduction of oceanic slabs at trenches. We show that over the past 80 million years (My), the East Pacific Rise (EPR), Earth’s dominant MOR, has been characterized by limited ridge-perpendicular migration and persistent, asymmetric ridge accretion that are anomalous relative to other MORs. We reconstruct the subduction-related buoyancy fluxes of plates on either side of the EPR. The general expectation is that greater slab pull should correlate with faster plate motion and faster spreading at the EPR. Moreover, asymmetry in slab pull on either side of the EPR should correlate with either ridge migration or enhanced plate velocity in the direction of greater slab pull. Based on our analysis, none of the expected correlations are evident. This implies that other forces significantly contribute to EPR behavior. We explain these observations using mantle flow calculations based on globally integrated buoyancy distributions that require core-mantle boundary heat flux of up to 20 TW. The time-dependent mantle flow predictions yield a long-lived deep-seated upwelling that has its highest radial velocity under the EPR and is inferred to control its observed kinematics. The mantle-wide upwelling beneath the EPR drives horizontal components of asthenospheric flows beneath the plates that are similarly asymmetric but faster than the overlying surface plates, thereby contributing to plate motions through viscous tractions in the Pacific region.

scholarly journals Three-dimensional passive mantle flow beneath mid-ocean ridges: an analytical approach

2008 ◽  
Vol 175 (2) ◽  
pp. 783-805 ◽  
Author(s):  
Marco Ligi ◽  
Marco Cuffaro ◽  
Francesco Chierici ◽  
Antonino Calafato
Keyword(s):  
Analytical Approach ◽  
Three Dimensional ◽  
Mantle Flow ◽  
Ocean Ridges
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