Supriyo Kumar Das

• PhD
• Professor (Assistant) at Presidency University, Kolkata

The present study explores organic matter (OM) source, thermal maturity, and its influence on microstructural properties of Palaeocene lignite samples from the Bikaner-Nagaur Basin, Rajasthan, India. The lignite samples depict δ 13 CTOC values ranging between-28.3 and-25.3 ‰ indicating mixed OM input of semi-aquatic emergent angiosperm (mangroves)...

Understanding the environmental and climate influence on the Holocene stable isotope record in peat is essential for applying the proxies in the paleoenvironmental reconstruction of lake and bog ecosystems. Here, we report total organic carbon (TOC), TOC to total nitrogen (N) ratio (C/N), and stable isotope ratios of organic carbon (δ13C) and nitro...

We present the first measurement of bioavailable strontium (87Sr/86Sr) and lead (206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb) isotope ratios from five cattle bones and one soil sample from Erenda, a Chalcolithic site in coastal east India. Bioavailable 87Sr/86Sr of bones differ from that of the soil. A similar Pb isotope ratio of bones to the soil in...

Nitrogen (N) stable isotope ratio (δ15N) in coal organic matter (OM) provides information on the N source and dominant mechanisms affecting isotopic fractionation during coalification. However, published data on δ15N distribution in coal is rare. The present study is one of the first reports on the δ15N composition of peat, lignite, sub-bituminous...

We present the first measurement of bioavailable strontium (87 Sr/ 86 Sr) and lead (206 Pb/ 204 Pb, 207 Pb/ 204 Pb, and 208 Pb/ 204 Pb) isotope ratios from five cattle bones and one soil sample from Erenda, a chalcolithic site in coastal east India. Bioavailable 87 Sr/ 86 Sr of bones differ from that of the soil. A similar Pb isotope ratios of bone...

Strontium has three naturally occurring non-radiogenic (84Sr, 86Sr and 88Sr) and one radiogenic (87Sr) isotope. Strontium enters the body through food and water, and deposits as hydroxyapatite in animal bones by substituting calcium [1]. The strontium isotope ratio (87Sr/86Sr) in archaeological faunal remains has been used as a useful tool to deter...

The Bengal Basin is a fluvio-deltaic basin spanning Bangladesh and part of east and northeast India. The evolution of the peripheral foreland basin has been studied, but published literature on depositional conditions, source and maturity of organic matter in the deeper sediments of the Indian section of the basin is rare, despite the fact that nat...

Higher ranked Permian and Cenozoic coals are reported in tectonically aAected regions of northeast India. The geochemical signature of the tectonically induced higher-ranked coals has not been studied carefully, although such coals' hydrocarbon potential is assessed using parameters, such as kerogen maturity. Notably, published data of stable isoto...

Integration of palaeobotanical (spores, pollen, phytoliths and non-pollen palynomorphs) and organic geochemical proxies, such as stable isotopes of organic carbon (δ ¹³ C) and n-alkanes, for studying the evolution and palaeoenvironmental conditions of an archaeological site are rare in India. The evolution of a protohistoric-historic site at Erenda...

Dynamics of surface geological processes, triggered by coseismic ground uplift following the 2004 Sumatra-Andaman earthquake (M w > 9.2), provide a modern analogue for assessing the paleoseismic significance of an enigmatic subsurface peat occurrence within beach sands in the western coast of North Andaman Island. The megathrust earthquake uplifted...

Middle Bengal Fan in the Bay of Bengal exhibits a unique channel-levee system and are primarily composed of turbidity and hemipelagic sediments. The turbidity sediments are transported and deposited by the Ganga–Brahmaputra (G–B) River system and are considered containing terrestrial organic matter (OM). In contrary, the marine primary production i...

The documented history of research on Proterozoic evidence of life in India is almost 200 years old. Although systematic study did not start before the middle of twentieth century, significant advancement has taken place in recent years in the application of sophisticated techniques involving stable isotopes and organic geochemical methods. The las...

The coal metamorphism, as it evolves the microstructure of the coals, would also have significant influence on the structural transformations and isotopic discriminations of the primary chemical moieties. The present study aims to illustrate the nitrogen functionalities present within the chemical framework of the bituminous coal samples from the R...

The coal metamorphism, as it evolves the microstructure of the coals, would also have significant influences on the structural transformations and isotopic discriminations of the primary chemical moieties. The present study aims to illustrate the nitrogen functionalities present within the chemical framework of the bituminous coal samples from the...

Barjora Basin in India is a small basin characterized by a high organic richness of early mature nature. The present study aims to find the source of organic matter (OM) and hydrocarbon generation potential of Barjora Basin. Systematically collected coal and shale samples from R-II seam of the basin were used for proximate and ultimate analyses, Ro...

IODP Expedition 354 drilled seven sites along an east west oriented core transect of 320 km length at 8°N in the lower Bengal Fan (France-Lanord et al., 2016). The sites were recovered to reconstruct the Himalayan uplift, the monsoonal development, and the turbiditic depositional mechanisms. We studied the Pleistocene sections of these sites using...

Lipid biomarker analysis in organic residue extracted from ceramics is an established technique in geoarchaeology (also bioarchaeology). To the best of our knowledge, no work has been published on biomarker-based organic residue analysis in ceramic samples excavated from Indian archaeological sites. This work attempts to analyse lipid residues in c...

The present work highlights the role of lamprophyre sill on the potential of hydrocarbon generation of shale beds. Here, the authors had systematically collected seven shales for detailed investigations of thermal impact provided by lamprophyre sill both along the dip and opposite to the dip directions of the shale beds. Proximate, ultimate, Rock E...

We conducted a multidisciplinary study to provide the stratigraphic and palaeoclimatic context of monsoonal rainfall dynamics and their responses to orbital forcing for the Bay of Bengal. Using sediment lightness we established an age model at orbital resolution for International Ocean Discovery Programme (IODP) Core U1452C-1H that covers the last...

Geochemical study of pottery provides useful information on the source of the raw materials (clay) of ancient vessels. However, published geochemical data on potteries from eastern coastal region of India is limited. Moreover, there are debates on the provenance of certain categories of fine ware, including the 'Rouletted ware', found in eastern co...

Sedimentary hydrocarbon remnants of eukaryotic C 26 –C 30 sterols can be used to reconstruct early algal evolution. Enhanced C 29 sterol abundances provide algal cell membranes a density advantage in large temperature fluctuations. Here, we combined a literature review with new analyses to generate a comprehensive inventory of unambiguously syngene...

Surface-altered hydrous iron(III) oxide incorporating cerium(IV) (CIHFO) was prepared and characterised via modern analytical tools for applications in fluoride removal from groundwater. The material with a Fe:Ce ratio of 1.0:0.5 (mol:mol) calcined at 473 K shows 24.8 ± 0.5 mg F⁻ g⁻¹ adsorption capacity at pH 5.0–7.0 from a solution with a concentr...

The Himalayas and resulting monsoonal climate provide the source and mechanism for sediment deposition in the Bay of Bengal. Sediments from the distal Bengal Fan collected during IODP expedition 354, with the exception the westernmost Site U1454, show a several meter thick, hemipelagic top layer representing the Late Quaternary. This interval has a...

IODP Expedition 354 drilled seven sites along an east west oriented core transect of 320 km length at 8°N in the lower Bengal Fan (France-Lanord et al., 2015). The sites were recovered to reconstruct the Himalayan uplift, the monsoonal development, and the turbiditic depositional mechanisms. Here, we concentrate on the hemipelagic sequences that r...

Table of Contents Chair’s word Activity report 2013–2014 Scientific essays 1. Finding the limits of the limes 2. Urban stratigraphy discontinuities and archaeoseismology in Roman Patras, Greece 3. Palaeogeographic evolution of the Guadalquivir Mouth during the last 6ka 4. Major element oxides in archaeological potteries (Fine ware) from coastal Ind...

International Ocean Discovery Program Expedition 354 to 8°N in the Bay of Bengal drilled a seven-site, 320 km long transect across the Bengal Fan. Three deep-penetration and an additional four shallow holes give a spatial overview of the primarily turbiditic deposi-tional system that comprises the Bengal deep-sea fan. Sediments originate from Himal...

IODP Expedition 354 set out in February to March 2015 to drill seven sites along an east west oriented core transect of 320 km length at 8°N in the Bengal Fan (France-Lanord et al., 2015). Seven sites were recovered to reconstruct the Himalayan uplift since the Oligocene and to decipher the trubiditic depositional mechanisms on the lower Bengal Fan...

Biogenic methane is produced during bacterially-mediated anaerobic mineralisation (methanogenesis) of organic matter (OM)1,2. The shallow subsurface metabolism of microorganisms primarily produce methane with a small amount (<2%) of ethane, propane, butane and pentane3. Methanogenesis is the final stage of a series of biogeochemical reactions durin...

Studying the biogeochemistry of shallow lake sediments, especially the source of sedimentary organic matter (OM), is challenging because of the low preservation of OM in shallow lake sediments. Here we report the source of sedimentary OM in a shallow freshwater lake, Verlorenvlei, in South Africa using a number of biogeochemical proxies. Elemental...

IODP Expedition 354 drilled a ~320 km long transect of seven sites on the Lower Bengal Fan at 8o N in the Northern Indian Ocean. The sediments cores recovered record a complex relationship between turbiditic and hemipelagic environments. This variability offers a unique opportunity to link our understanding of tectonic and terrestrial processes wit...

International Ocean Discovery Expedition 354 to 8°N in the Bay of Bengal drilled a seven site, 320 km long transect across the Bengal Fan. Three deep-penetration and an additional four shallow holes give a spatial overview of the primarily turbiditic depositional system that comprises the Bengal deep-sea fan. Sediments originate from Himalayan rive...

Widespread availability of potteries makes it as one of the main categories of artefacts studied by archaeologists worldwide. Geochemical study of pottery provides useful information on the source of the raw materials (clay), and the contents or use of ancient vessels (Ramos et al., 2002a). However, published geochemical data on potteries from east...

a b s t r a c t We evaluate the application of the branched glycerol dialkyl glycerol tetraether (br GDGT) based palae-otemperature and palaeoenvironmental proxy to a hyper-eutrophic, polluted and shallow oxic lake. Lake Zeekoevlei is the largest freshwater lake in South Africa, located close to Cape Town. We use published lake-based and soil-based...

Soil, rock and water samples were collected from India's oldest coalfield Raniganj to investigate trace metal contamination from mining activity. Our data reveal that trace metal concentration in soil samples lies above the average world soil composition; especially, Cr, Cu, Ni and Zn concentrations exceed the maximum allowable concentration propos...

Zeekoevlei is the largest freshwater lake in South Africa and has been suffering from hyper-eutrophic conditions since last few decades. We have used total P (TP), dissolved phosphate (PO4 3−), organic P (OP), calcium (Ca) and iron (Fe) bound P fractions to investigate the relevant physical, chemical and biological processes responsible for sedimen...

Zeekoevlei is the largest freshwater lake in South Africa and has a century-long history of anthropogenic impact that caused hyper-eutrophic conditions. We used biomarkers (alkanes and pigments), stable isotopes (δ13C and δ15N), rates of primary palaeoproduction and total inorganic carbon (TIC) accumulation rates in the lake sediments to investigat...

This study reports a multi-parameter geochemical investigation in water and sediments of a shallow hyper-eutrophic urban freshwater coastal lake, Zeekoevlei, in South Africa. Zeekoevlei receives a greater fraction of dissolved major and trace elements from natural sources (e.g., chemical weathering and sea salt). Fertilizers, agricultural wastes, r...

We investigated the source, seasonality and historical changes in polycyclic aromatic hydrocarbons (PAHs) in Zeekoevlei, a shallow freshwater lake in South Africa. PAH input follows historical changes in land use pattern and recreational activities in Zeekoevlei since the early 1990s. Because anthropogenic activity in the catchment is low, this has...

Abstract This thesis describes a multi-parameter biogeochemical investigation in a shallow hypereutrophic freshwater coastal lake, Zeekoevlei, in South Africa. The predominance of autochthonous algal-derived organic matter in lake sediments is indicated by low CIN, high H/C ratios and 813Corganic values. Seepage from a nearby waste water treatment...

We used elemental carbon, nitrogen, phosphorus and hydrogen ratios (C/N, N/P and H/C) with total organic carbon (TOC) and total phosphorus (TP) as well as stable carbon and nitrogen isotopes (δ13C and δ15N) to investigate the source and depositional conditions of organic matter in sediments from Zeekoevlei, the largest freshwater lake in South Afri...