M. Sundararajan

M. Sundararajan
National Institute for Interdisciplinary Science and Technology | NIIST

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58
Publications
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586
Citations
Citations since 2017
20 Research Items
418 Citations
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080

Publications

Publications (58)
Chapter
The variation in sea level is disturbing a large number of the global population, especially concentrated along the coastal stretch that depends greatly on maritime activities for their livelihood. The effects of global warming on climate and habitation may vary according to factors like geology, geomorphology, and tectonics of the coastal land. Th...
Article
A combination of advanced characterisation techniques was applied to study the structure, chemistry, and surface morphological features of detrital zircon and monazite grains from the coasts of Varkala and Kovalam situated in the south-west part of India, showing implications to their metamict state, Rare Earth Element (REE) chemistry, and provenan...
Chapter
ABSTRACT Fullerene, an allotrope of carbon, has attracted significant recognition in various sciences since its discovery in 1985. The studies of its physical, chemical, and biological aspects have brought encouraging information. The unique, cage-like structure and its scope for derivatization make it an outstanding therapeutic agent. Hence, resea...
Article
Full-text available
The beach sands of the Indian coast are bestowed with strategic minerals like ilmenite, monazite, rutile, sillimanite, garnet, and zircon. In order to bring out the importance of these heavy minerals, we present detailed studies on structure, surface chemistry, and absorption spectroscopy using advanced characterization techniques such as Raman spe...
Article
The beach sands of the Varkala-Kovalam coast, south-west India, are enriched with heavy minerals with a high concentration of ilmenite followed by sillimanite, monazite, rutile, zircon, and garnet. The Fe–Ti oxide minerals such as ilmenite, its altered product leucoxene, and rutile were successfully recovered, and their structure, chemistry, and su...
Article
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Chavara and Manavalakurichi are the two important areas with heavy mineral deposits in India. Surface samples were collected from five locations, each from Chavara and Manavalakurichi, and were analyzed for their textural parameters and mineralogy. Sediments from both regions are characteristically fine and medium sand. Chavara (CH) sands are moder...
Preprint
Full-text available
The fullerene (C 60 ) is economically significant due to its significant applications in diverse areas like nanochemistry, superconductivity, materials science, etc. The carbon allotrope fullerene C 60 and C 70 are identified within the thick sequence of black carbonaceous units belonging to the shungite suite of rock at the baryte mine, Mangampet,...
Preprint
Full-text available
The fullerene (C 60 ) is economically significant due to its significant applications in diverse areas like nanochemistry, superconductivity, materials science, etc. The carbon allotrope fullerene C 60 and C 70 are identified within the thick sequence of black carbonaceous units belonging to the shungite suite of rock at the baryte mine, Mangampet,...
Chapter
The coastal tracts of India consist of beach sands showing good concentration of strategic heavy minerals. In the present study, the mineralogy of important coastal placer deposits in India like Chavara deposits in Kerala and Manavalakurichi deposits in Tamilnadu were studied using Landsat multispectral satellite data for deriving potential targets...
Chapter
Urbanization along the coastal line tends to increase the concentration of heavy metals like Fe, Pb, Zn, Cr, Cd, Cu, Mn, and Ni in seawater. In this study, seawater samples collected around the coast of Calicut beach in Kozhikode district, Kerala, India have been analyzed for heavy metal contamination and its influence on the coastal aquifer system...
Chapter
In the present study, beach sediments, cliff, and inland soil samples (within 1 km from the coastline) collected along the coast of Varkala in Trivandrum, the southernmost district of Kerala, India, were analyzed for examining the presence of major and trace elements. The samples were analyzed using advanced characterization techniques like energy...
Article
Full-text available
Detailed investigation on texture and mineralogy of beach sediments helps to understand their nature of deposition and potential targets of strategic mineral deposits. The beach sediments from the coast of Thiruvananthapuram, the southernmost district of Kerala, India, have been studied to understand the variation in grain size by using the spectra...
Article
Major, trace, rare earth elements and ¹³C isotope results of sediments collected up to the depth of 150 m below ground level (m bgl) have been interpreted in relation to the provenance, weathering and deposition conditions of a multi layered sedimentary formation of Pondicherry region located in East Coast of India. The samples fall in the coarse t...
Article
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The present study was carried out to understand the impact of landuse pattern that includes agricultural and urban development on coastal aquifers of the SE coast of India. Regional geology includes marine sediments, alluvium, sandstone and laterite formations. Groundwater samples were collected from 50 dug wells and bore wells during pre-monsoon 2...
Article
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An automated geo-processing modeling of sediment variability has been designed with a variety of geo-processing tools and used for the assessment of sediment load volumetric change. The Azhikode estuary on the western coast of Kerala state, India, confluences with west flowing river of the Western Ghats and is one of the dynamic zones due to the di...
Conference Paper
Full-text available
The mafic-ultramafic rocks of the late Archaean highgrade metamorphic terrain of Bhavani shear zone in the south India were delineated using the TIR bands of ASTER remote sensing data. These rocks show high thermal emissivity in the TIR bands especially those with low silica content corresponds to high emissivity in the thermal band 12. Image proce...
Article
A combination of unit operations like gravity, magnetic, and electrostatic separation techniques were applied to separate strategic heavy minerals from bulk samples taken from two coastal stretches of Kappil-Varkala (KV) and Shanghumugham-Kovalam (SK) in Thiruvananthapuram, south Kerala, India. On processing the feed, the concentrate obtained conta...
Chapter
Full-text available
Studies related with beach placers or heavy minerals deposits in and around Tamil Nadu coast reveals high concentration of heavy minerals, most commonly from the surface and subsurface part of earth. The heavy mineral assemblage in the beach facies mainly consists predominantly of ilmenite, rutile, leucoxene, garnet, zircon, monazite, sillimanite...
Article
Full-text available
Based on the interpreted results of Vertical Electrical Sounding three to five subsurface geoelectrical layers have been delineated. Various thematic maps such as iso-resistivity contour of different layers, iso-apparent resistivity contour maps, transverse resistance, longitudinal conductance and anisotropy contours have been prepared. In addition...
Article
The present study was undertaken to examine the depositional and transportation pattern in the tourist beaches of Chennai in SE coast of India. Twenty four samples were analyzed for textural parameters, Linear discriminate function (LDF), C-M plots and heavy/light minerals from beach, berm and dune regions. Results of textural parameters indicate t...
Article
Full-text available
The east coast of Tamilnadu, India has been studied for the scanning microscopy of quartz grain size analysis and textural parameters along the Gadilam and Ponnaiyar River reveals of some micro features. There are three types of process environments viz. Beach (Littoral), subaqueous and low to high energy environments appear to be active the east c...
Article
Full-text available
The growth as well as the internal structure of the recently emerged Talashil spit along the west coast of India was studied using multidate satellite images coupled with ground-penetrating radar (GPR) information. Decadal changes (2003–2013) in configuration, geomorphology and erosion and accretion pockets along the spit were traced and compared....
Article
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Groundwater from 47 wells were analyzed on the basis of hydrochemical parameters like pH, electric conductivity, total dissolved solids, Ca2+, Mg2+, Na+, K+, Cl−, CO32−, HCO3−, NO3−, PO43− and F− in the Cauvery delta of Vedaraniyam coast. Further, water quality index (WQI), sodium percentage (Na %), sodium absorption ratio, residual sodium carbonat...
Article
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A study was carried out in the Madurai district of Tamil Nadu, India to identify the hydrogeochemical processes using factor analysis as a predictive tool. It also focuses on characterizing the samples of these factors with respect to standard geochemical plots. In order to obtain a synoptic view of the statistics and the geochemical processes, a t...
Article
The concentration of trace metals like Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were studied in beach and estuarine sediments of the Velanganni Coast, South East coast of India to understand metal pollution due to urbanization/industrialization. This area was affected by the urbanization activity like untreated effluent discharge, transportation and inci...
Article
Tender coconut water (TCW) is rich in nutrients, presenting low fat levels, and considered to be an excellent isotonic drink. To understand the chemistry of TCW, samples of TCW with 6–7 and 11–12 months of maturity were collected from the same coconut trees in different locations in the coastal Cuddalore district. It was found that TCW is dominated...
Article
Full-text available
Surficial sediments of beaches along the Cuddalore, central coast of Tamilnadu from Ponnaiyar estuarine to Thirumulaivasal were studied for their textural parameters namely Mean (Grain size) phi, Standard deviation, Skweness and Kurtosis and mineral percentages. Observed variation of energy conditions are controlled by the fluvial profile in the ri...
Article
Determination of Grain size analysis of beach sediments along location of kameswaram is studied. For this purpose, mean, standard deviation, skewness, and kurtosis were calculated from the cumulative curves to study the depositional processes. Environment of deposition was studied. Mean size and standard deviation distribution clarifies this observ...
Article
The granulometric studies of vertical sediments are generally reveals medium to fine grained nature of sediments. The standard deviation (δ1) indicates that the samples are well sorted nature. The graphic skewness (ski) indicates that they are near symmetrical and fine skewed. The kurtosis (Kg) values of the sediments vary in leptokurtic nature. Al...
Article
Full-text available
Thiruchendur coast of southern Tamilnadu, India has been studied for grain-size spectrum and textural param-eters namely mean, sorting, skewness and kurtosis. The grain-size spectrum shows a marked variation in the berm, high tide line (HTL) and low tide line (LTL) stretches. Variation in energy condition is controlled by geomorphology of the sed-i...
Article
Full-text available
Surficial sediments of beaches along the Cuddalore, central coast of Tamilnadu from Ponnaiyar estuarine to Thirumulaivasal were studied for their textural parameters namely mean (grain size) phi, standard deviation, skewness and kurtosis and mineral percentages. Observed variations of energy conditions were controlled by the fluvial profile in the...
Article
Full-text available
The Gulf of Mannar, located between India and Sri Lanka, is a shallow embayment of the Bay of Bengal. The gulf, which has been declared a bio-reserve is a highly productive area endowed with rich marine fauna including corals. In order to study the origin and nature of the sediments and paleo-environment, 2.6 m length core was collected with 5cm in...
Article
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The Mullipallam creek in Muthupet mangroves region is the only E-W trending coastal strip in the SE coast of India and is very important, as the mangrove acts as a barrier to natural diasters. Natural, anthropogenic signals and accumulation of elements were made by collecting sediment samples at various depths in a core. All sediments were analyzed...
Article
Full-text available
The core sediment samples were analysed for grain size, carbonates (CaCO3), organic carbon (OC) to obtain a preliminary view of its environmental conditions near Point Calimere along the southeast coast of Vedaranyam, India.The high concentration of sand in the core is attributed to the tidal influence at the Akkarapallivasal river mouth. The sea w...
Article
Full-text available
The Serthalaikkadu creek in Muthupet mangroves region is the only E–W trending coastal strip in the SE coast of India and it also acts as a barrier to natural disasters. Natural, anthropogenic signals and accumulation of elements were studied by collecting sediments from two cores. Textural parameters were studied in detail and carbonates (CaCO3),...
Article
Surface samples have been collected from Kerala coast, Valapatanam-Azhikode deposit of northern Kerala coast. The average heavy minerals percentage shows 30.32 %. The heavy mineral assemblage of samples from area showed an appreciable percentage of opaque followed by sillimanite and zircon. The chemical analysis carried out for the present investig...
Article
Full-text available
The surface sediment samples were analyzed for grain size carbonates (CaCO 3) and organic carbon (OC) to obtain a preliminary view of its environmental conditions near Point Calimere along the southeast coast of Vedaranyam, India. The total concentrations of major elements namely, Si, Al, Fe, Ca, Mg, Na, K and P in the surface sediments of Vedarany...
Article
Full-text available
Kerala state in the SW part of Indian subcontinent hosts one of the best beach placer deposits in the world. The near shore deposit is ~140Mt and is very rich in heavy minerals, often up to 70%, and ilmenite forms its chief constituent. The seasonal enrichment of this deposit takes place through monsoonal activity and the recent tsunami (24 Decembe...
Article
Full-text available
A representative feed sample of White Silica Sand was wet-sieved in order to recover the desired fractions for glass making. BIS specification shows that (-600, +300) μm) fraction (A) should not be more than 50% and (-300, +125) μm fraction (B) should be 50% minimum. The mass percentage of A and B is found to be 29.9 and 70.1% (ratio =1:3.34) which...
Article
Full-text available
Surface samples have been collected from Kerala coast, Chavakad - Ponnani (CP- central sector), Neendakara - Kayamkulam (NK- southern sector) beach sectors for ilmenite characterization studies. The TiO2 percentage in samples from NK deposit is greater than that in CP deposit. X-ray diffraction analysis of ilmenite shows characteristic peaks of ilm...
Article
Full-text available
Granulometric and heavy mineral investigations of sediments along the coastal region from Ullal beach to Suratkal beaches along western coast of Karnataka were undertaken systematically. Texturally the beach sediments were medium size sand in the southern region, where as fine size sand was observed in the northern region. Unimodal, moderately sort...
Article
Full-text available
A representative feed sample of Yellow sand was wet-sieved in order to recover the desired fractions for glass making. The mass percentage of (-600 +300) m and (-300 +125) m fraction was found to be 44.2 and 55.8% (ratio 1:2.26).Hence, this ratio which satisfies the size specifications for glass making sand, was maintained for all the down stream...
Article
In this study the results of physical and chemical characterizasition studies of sillimanite are presented. Sillimanite was collected from the area Manavalakurichi. Sillimanite is brownish in color and has a specific gravity of 3.21 with bulk density 2.14 gm/cc. It is conchoidal in nature and has a surface area of 0.12 m /gram. Particle size of the...

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