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Shoreline configurations control on the concentration of nearshore heavy minerals: A case study from Konkan-Maharashtra, central west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Shoreline configurations control on the concentration of nearshore heavy minerals: A case study from Konkan-Maharashtra, central west coast of India
 
Creator Gujar, A.R.
Rajamanickam, G.V.
Wagle, B.G.
 
Subject coastal zone
heavy minerals
geophysical exploration
geological surveys
coastal morphology
mineral exploration
 
Description The geological and geophysical exploration in the nearshore areas between 3 and 19 m water depth, in four bays viz., Wada-Vetye, Ambolgarh, Rajapur and Vijaydurg along the Konkan Coast - central west coast of India (16 degrees 42' and 16 degrees 33' N Lat. and 73 degrees 14' and 73 degrees 20' E long.) has revealed the presence of heavy mineral concentrations rich in ilmenite and magnetite in the surficial sediments. The heavy mineral concentration reaches upto 80% (average 30.0%) in the study area, with the highest concentration in Ambolgarh Bay, (6.9 to 80% on an average to 40.86%) and lowest in the Wada-Vetye Bay (0.6 to 54% on an average to 17.71%). Intermediate concentration in the range of 5.38 to 76.22% (average 36.87%) and 4.3 to 65.9% (average 28.47%) are found in Rajapur and Vijaydurg Bays respectively. The variations in the distribution pattern of heavy minerals varies from bay to bay is attributed to the influence of coastline configuration and its morphological features. The Ambolgarh Bay which has the highest concentration is arcuate with gentle gradient. NE-SW orientation appears to be more suitable for the accumulation of more heavy minerals. Wada-Vetye Bay with steep gradient almost oriented in N-S direction and causes minimal interception of the sediment movement resulting poor accumulation of heavy minerals. The E-W oriented Rajapur Bay, with moderate to gentle gradient shows moderate to high concentration of heavy minerals mainly due to the partial wave convergence around Musakazi promontory in the northern part. In the Vijayadurg Bay, with NNE-SSW orientation and moderate to gentle gradient, has fair concentrations of heavy minerals are due to its arcuate shape, disposition in the updrift side of wave converging point and accretion.
 
Date 2009-01-07T10:43:40Z
2009-01-07T10:43:40Z
2001
 
Type Conference Article
 
Identifier Proceedings of the International Seminar on Quaternary Sea-Level Variation, Shoreline Displacement and Coastal Environment, Ed by: Rajamanickam, G.V.; Tooley, M.J. 140-147p.
http://drs.nio.org/drs/handle/2264/1556
 
Language en
 
Rights Copyright [2001]. 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 New Academic Publishers, Delhi