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Surface microtextures of quartz grains from the central coast of Tamil Nadu

DRS at CSIR-National Institute of Oceanography

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Title Surface microtextures of quartz grains from the central coast of Tamil Nadu
 
Creator Udayaganesan, P.
Angusamy, N.
Gujar, A.R.
Rajamanickam, G.V.
 
Subject quartz grains
coastal processes
shelf topography
littoral currents
 
Description Quartz grain surface micro textures of 12 samples collected from the beach were examined under scanning electron microscopy to understand the role of coastal processes on their transportation and deposition. The study area has been divided into three sectors on the basis of drainage, geomorphology and nature of the beach and shelf topography. Surface textures of the northern sector display an array of mechanical features like conchoidal fracture, V marks and impact pits, indicating the dominance of mechanical processes. However, silica precipitation in the form of globules indicates an added influence of chemical processes in the Northern sector. The presence of chemical features in northern sector, where energy level is high, corroborates the addition of quartz grains from paleo-sediments, from the nearby Tertiary and Cretaceous formations. Central sector quartz grains display the signatures of chemical and mechanical processes. The presence of step like furrows in southern sector is an indicator of fluvial low energy conditions, and supplements the role of littoral currents in depositing the quartz grains along the coastal region
 
Date 2011-01-14T10:41:41Z
2011-01-14T10:41:41Z
2011
 
Type Journal Article
 
Identifier Journal Geological Society of India, vol.77(1); 2011; 26-34
http://drs.nio.org/drs/handle/2264/3775
 
Language en
 
Rights © GEOL. SOC. INDIA. 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 Geological Society of India