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Shallow stratigraphy and gas-charged sediments in the inner shelf off Redi, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Shallow stratigraphy and gas-charged sediments in the inner shelf off Redi, west coast of India
 
Creator Subbaraju, L.V.
 
Subject bathymetry
side scan sonar
seismic data
sediments
continental shelves
gas hydrates
stratigraphy
 
Description Bathymetric, side scan sonar and seismic studies were conducted in shallow waters of 11-18 m off Redi along central west coast of India to understand the stratigraphy and structural features. Bathymetric contours suggest the existence of a palaeochannel running across the region in ENE-WSW direction. Shallow seismic surveys indicate a pseudo escapment of more than 7 m deep between 12-14 m water depths. Eastern part (11-14 m) of the escarpment indicate the existence of gas-charged sediments (silty clays) within 3 m of sea floor. In the west (14-18 m), the subsurface layer (silty sand?) observed at 10-12 m from sea floor is breached and pushed upwards into surface layer indicating inverted U-like and cylindrical features. These features reaching within 4-5 m of sea floor suggest the continuation of gas-charged sediments in the west. Isopach and gas-charged sediment maps of the region lead to the demarcation of the areas that should be avoided by any offshore engineering activities.
 
Date 2009-01-12T09:18:22Z
2009-01-12T09:18:22Z
1997
 
Type Conference Article
 
Identifier Proceedings of the Second Indian National Conference on Harbour and Ocean Engineering (Inchoe-97), Thiruvananthapuram, December 7-10, 1997. Vol. 2, 1182-1190p.
http://drs.nio.org/drs/handle/2264/2049
 
Language en
 
Rights Copyright [1997]. 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 Cent. for Earth Sci. Stud., Cochin (India)