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Contrasting sulfidization in the turbidite and hemipelagic sediments of Bengal Fan
(Elsevier Ltd, 2020)
We report for the first time, contrasting sulfidization profiles in a sedimentary sequence comprising of clay-silt turbidites and hemipelagic dominated deposits in a channel-levee complex of the middle Bengal Fan. The ...
Recent contributions to the geochemistry and sedimentology of estuaries, mangroves, and mudbanks along the Indian coast: A status report
(Indian National Science Academy, 2020)
In the last four years, significant progress has been made in biogeochemical/ geochemical and sedimentological studies of the coastal sediments along the east and west coasts of India. The present review highlights the ...
Influence of dual sulfate reduction pathways on pore-fluid chemistry and occurrences of methane hydrate in sediment cores (IODP-353) off Mahanadi basin, Bay of Bengal
(Geochemical Society of Japan, 2020)
Pore fluid chemistry of sediment cores from two coring sites collected from Mahanadi basin (Bay of Bengal) during IODP-353 was studied to understand the intra-basinal variation in microbially mediated sediment biogeochemistry ...
Cryptic roles of tetrathionate in the sulfur cycle of marine sediments: microbial drivers and indicators
(Copernicus Publications, European Geosciences Union, Germany, 2020)
To explore the potential role of tetrathionate in the sedimentary sulfur cycle, population ecology of microorganisms capable of metabolizing this polythionate was revealed at 15-30 cm resolution along two, ~3 m long, cores ...
Microbiome and ecology of a hot spring-microbialite system on the Trans-Himalayan Plateau
(Nature Research, 2020)
Little is known about life in the boron-rich hot-springs of Trans-Himalayas. Here, we explore the geomicrobiology of a 4438-m-high spring which emanates ~70 °C-water from a boratic microbialite called Shivlinga. Due to low ...
Monsoon rainfall and contrasting source rocks influenced sediment composition of peninsular basins along the east coast of India (western Bay of Bengal)
(Elsevier Ltd, 2020)
The peninsular India is characterized by remarkable variation in lithological composition as well as contrasting rainfall distribution patterns. The erosional and weathering history of these source rocks along with monsoonal ...
34S enrichment as a signature of thiosulfate oxidation in the " Proteobacteria "
(Oxford University Press (OUP), 2021)
Kinetics of thiosulfate oxidation, product, and intermediate formation, and 34S fractionation, were studied for the members of Alphaproteobacteria Paracoccus sp. SMMA5 and Mesorhizobium thiogangeticum SJTT, the Betaproteobacteria ...
Fe and S-isotope compositions of hydrothermal deposits from Kings Triple Junction, Lau Basin, southwest Pacific Ocean
(Elsevier, 2021)
We analyzed iron and sulfur isotopic compositions of polymetallic sulfides from an extinct hydrothermal mound near the Kings Triple Junction of the northern Lau basin belonging to a back-arc basin for understanding the ...
The first record of the genus Lamellibrachia (Siboglinidae) tubeworm along with associated organisms in a chemosynthetic ecosystem from the Indian Ocean: A report from the Cauvery-Mannar Basin
(Springer Science and Business Media LLC, 2021)
Here, we report for the first time, the genus Lamellibrachia tubeworm and associated chemosynthetic ecosystem from a cold-seep site in the Indian Ocean. The discovery of cold-seep was made off the Cauvery-Mannar Basin ...
First record of cold-seep induced enhanced water column methane concentrations from the EEZ of India
(Springer, 2021)
A scientific expedition was carried out onboard RV Sindhu Sadhana (12th to 23rd February, 2020) for gas hydrate/cold-seep exploration in Mannar basin, northern Indian Ocean. We observed for the first time gas flares in the ...