Record Details

Ocean, Spreading Centre

DRS at CSIR-National Institute of Oceanography

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Field Value
 
Title Ocean, Spreading Centre
 
Creator Krishna, K.S.
 
Subject mid-ocean ridges
seafloor spreading
ocean floor
seismic structure
 
Description A midocean ridge, an underwater mountainous feature, extends for a length of about 65,000 km as a single continuous body in the global oceans. It is a window to the Earth's interior, through which magma is continuously upwelling and drives the lithospheric plates on either side in order to accommodate newly accreted crust. Many of the oceanic ridges in the world oceans have been abandoned in the geologic past and led to resume the activity elsewhere either in the intra-oceanic or intracontinental plate regions. Partial melted mantle upwelled through the midocean ridge forms a layer of basaltic crust 3–6 km thick, but at a later stage the same crust moves away from the ridge crest and allows growth of mantle component. The upwelling magma rates along the mid-oceanic ridges, in general, control the internal structure. Geophysical experiments over the global midoceanic ridges have found some explicit relationships between spreading rate, seismic structure, and ridge-axis morphology.
 
Date 2011-08-18T07:17:22Z
2011-08-18T07:17:22Z
2011
 
Type Book Chapter
 
Identifier In "Encyclopedia of Solid Earth Geophysics. Ed. by: James, D.E.", Springer(13); 2011; 908-912
http://drs.nio.org/drs/handle/2264/3897
 
Language en
 
Rights Copyright [2011] Springer.
 
Publisher Springer