
Swagata ChaudhuriIndian Institute of Technology Dhanbad | ISM · Department of Applied Geology
Swagata Chaudhuri
Doctor of Philosophy
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12
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Publications
Publications (12)
Gas hydrates have been reported in diverse environments ranging from marine sediments of continental margins and deep-sea fans to permafrost zones. However, they are rarely reported from mass transport deposits (MTDs). Here, we combine paleontologic, grain size, stable isotopes, two-dimensional seismic profiles, and downhole log data from the Quate...
We analyzed the reflectance and emittance spectra of representative samples of mega and microfossil-bearing limestones and identified the mineralogical controls, which may have led to the preservation of mega and microfossils in the limestone within the spectral domain of 400-2500 nm and 8000-14000 nm. In this regard, we collected and analyzed the...
The deposition of a substantial amount of clastic sediments in the Krishna Godavari Basin formed a thick layer of nannofossil-rich clay known as the Godavari Clay Formation. This clayey sequence is a treasure trove for unveiling paleoclimatic and paleoceanographic information. Numerous radiometric dates from the topmost portion of this clay (top 27...
This study examines benthic and planktic foraminiferal groups from the western Bay of Bengal to comprehend paleoceanographic changes, Indian Summer Monsoon (ISM) dynamics, and long-term impact of periodic global climatic changes on the Indian monsoon. AMS 14C dating of benthic foraminifera indicates that the investigated period extends from 335 BC...
The present work is pursued on the benthic foraminiferal groups obtained from NGHP core samples of the western Bay of Bengal to understand the
variations of paleoceanography and Indian Summer Monsoon (ISM), as well as socio-economic changes in ancient India. Benthic foraminiferal AMS 14C
dating reveals that the studied interval spans between 335 BC...
A well-developed 86 m-thick Cenozoic sedimentary succession in the Matanomadh area, western Kachchh, was studied to assess the stratigraphic positions of different units, ascertain depositional environments, and the degree of climatic controls over time depositional processes. Age-diagnostic nannoplankton species Cyclicargolithus floridanus (46.29–...
Abstract The potential of reflectance spectroscopy to infer the paleoecological and depositional evolution of different micro and macro invertebrate fossils has been evaluated by analyzing their reflectance spectra within the spectral domain of 350–2500 nm using the FIELDSPEC3 spectroradiometer. Mineralogical information derived from the rapid and...
A systematic comparative study of microfaunal assemblage and representative geochemical elements from two Cenozoic basins of India, Mangrol-Valia Lignite Mine section (21°30'52''N:73°12'20.5''E) of Cambay Shale Formation, western India and Jigni section (33°14'45"N:74°22'0"E) from Subathu Formation in northern India was undertaken to infer the pale...
A preliminary study of microfaunal assemblage, representative palynofloral elements and
geochemical characteristics of the subsurface beds of the Eocene Cambay shale Formation
exposed in Valia Lignite Mine section, Western India was undertaken to infer the
paleoenvironment and paleobathymetry of the succession.
The Vastan and the adjacent open cast...
Questions
Questions (8)
These larger benthic foraminifera (probably) are very well preserved in the Miocene sediments. Please help to identify the species
Hi everyone, we use traditional techniques such as simple water soaking or methods using hydrogen peroxide (H202) or washing-soda (Na2CO3) for disintegration and extraction of foraminifera and other microfossils from soft sediments. However, these methods are not possible for very hard carbonate rocks as hydrogen peroxide can't disintegrate them. So, is there any process by which the foraminifera can be extracted from the hard limestone rocks apart from doing petrographic thin sections?
How did climate conditions influence the formation of limestone?
I have completed the age-depth model Using Bacon 2.2 software for radiocarbon age dating, where the calibrated age range (minimum-maximum), mean and median values are only provided. However, there is no uncertainties value are given at the output. I want to add the error bars on the calibrated obtained chronology, as they could be an important factor. How to add error bar to the obtained chronology?
I have geochemical data of sedimentary sequence. From XRD data I got signatures of certain clay minerals like smectite and Kaolinite. But I need the quantitative analysis to find out the percentage of clay from certain sedimentary units. Also, I have XRF and ICP-MS data of the same sequence. Is there any way to get the quantitative clay percentage from major oxides/Trace/ REE?
The tectonic models define paleocontinental assembly, the supercontinent Pangea has been disassociated into independent Laurasia and Gondwana, separated by a vast oceanic Tethys. Is there any way to determine the paleo position of India during 10 Ma - 3 Ma?
I have completed the indirect dating methods like foraminiferal biostratigraphy and nannoplankton stratigraphy of Quaternary marine core sample.For direct dating of 1000 yr - 2.5 Ma marine core samples which method will be suitable?
In regular graph the vertical axis value always increasing upward starting from 0. But in this stack pattern the increasing values of vertical axis is plotted in a reverse manner than conventional way.