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Seamounts an additional tool to confirm the nature of the crust and to locate possible mineral resources for dredging

DRS at CSIR-National Institute of Oceanography

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Title Seamounts an additional tool to confirm the nature of the crust and to locate possible mineral resources for dredging
 
Creator Sarma, K.V.L.N.S.
Ramana, M.V.
Subrahmanyam, V.
Krishna, K.S.
Ramprasad, T.
Desa, M.
 
Subject seamounts
crustal structure
bathymetric data
dredging
ocean floor
mineral resources
geomorphology
oceanic crust
 
Description Study of bathymetric data for the distal Bengal Fan reveals the presence of positive topographic features resembling seamount. These features exhibit a relief of about 800 m above the surrounding seafloor at 4,400 m and are associated with large-amplitude magnetic and gravity anomalies. Magnetic model studies suggest that one of the seamounts evolved along with the oceanic crust represented by the magnetic isochron A32 (approx. 72 My), while the other seamount was emplaced over the Cretaceous Quiet Zone Crust with reversed polarity. The seamounts studied provide an environment for possible locations of polymetallic encrustations. Morphology of the seamounts depends on several factors, including physical and chemical composition of the magma, eruption style, sediment thickness, maturity of underlying crust, and time of origin. Studying the seamounts together with integrated geophysical and physical data gave useful indications of their evolution and the existence of possible mineral deposits
 
Date 2009-01-11T12:04:21Z
2009-01-11T12:04:21Z
1998
 
Type Journal Article
 
Identifier Marine Georesources and Geotechnology, Vol.16; 41-51p.
http://drs.nio.org/drs/handle/2264/1930
 
Language en
 
Rights Copyright [1998]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Taylor and Francis