Article
Geography, Physical
Szabolcs-Attila Kovecsi, Gyorgy Less, George Ples, Raluca Bindiu-Haitonic, Antonino Briguglio, Cesare Andrea Papazzoni, Lorand Silye
Summary: Extensive high-resolution palaeontological, stratigraphic and sedimentological data offer a new and comprehensive view of the genesis and evolution of the most extended Eocene nummulitic accumulation in the northern Neotethyan realm. Different assemblages dominated by N. beaumonti and N. perforatus reflect the interplay between the paleoenvironment and the ecological preferences of the two Nummulites species.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Paleontology
Sreemoyee Chakraborty, Dhurjati P. Sengupta
Summary: A nearly complete skull of Remingtonocetus harudiensis was discovered in western India, showing previously unknown variations in morphology within the species. This finding expands our knowledge of skull morphology, specifically in terms of size, dental structure, and external nasal feature. The newly excavated skull is the largest one found so far, similar in size to Dalanistes ahmedi, and it nullifies a major distinction between Dalanistes and Remingtonocetus regarding body size. The discovery also provides insight into the geological settings where Remingtonocetus specimens have been found in the Harudi Formation of the Kutch Basin.
Article
Energy & Fuels
Manisha Chaudhary, Ravi Sharma, Deepak Kapoor, Mohammad Sadiq
Summary: This study successfully identifies the different textures within the Deccan basalt using conventional open hole logs and delineates the zones with good reservoir properties. The study also standardizes the logging signatures of different basalt facies and identifies two sets of natural fractures in the Deccan basalts. The findings of this study provide key insights into the formation evaluation of the Deccan trap and help reduce uncertainties.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Paleontology
Sanjay Kumar Mukhopadhyay
Summary: A middle Eocene to lower Oligocene rock formation in Gujarat, India contains Nummulites with varied septal filaments, which show progressive changes in the succession. The study provides insights into the evolution of Nummulites and their stratigraphic distribution, contributing to our understanding of the regional geological evolution.
Article
Geography, Physical
Jihede Haj Messaoud, Nicolas Thibault, David De Vleeschouwer, Johannes Monkenbusch
Summary: This study investigates the timing of the Middle Eocene Climatic Optimum (MECO) peak warming and the maximum abundance of nummulites in the Southern Mediterranean. The results indicate that the maximum accumulation of nummulites and negative excursion of δ18O occurred during the MECO's warming peak (40.07 to 40 Ma), 200 kyr after the middle Eocene third-order maximum flooding surface.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Engineering, Geological
R. Vijaya, A. Boominathan
Summary: Through studying the seismic site response in the Kutch basin, significant amplification was observed at the basin center and the region between the center and the edge, with the frequency content of the surface motion shifting from a narrow to a broad spectrum from the edge towards the basin center.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Biology
Hukam Singh
Summary: The Indian Eocene amber has a diverse pollen assemblage dominated by plants like Liliacidae and Palmidites. Compared to the pollen extracted from sediment samples, the pollen assemblage in the amber is more diverse and better preserved.
HISTORICAL BIOLOGY
(2021)
Article
Geography, Physical
Jingyu Zhang, Fengcun Xing, Wout Krijgsman, Cheng Zhang, Wei Wei, Lin Chen, Suju Yang, Xiaochen Liu, Yongchao Lu
Summary: The Paleogene sedimentary successions of the Tarim Basin in western China are reconstructed to understand the palaeogeographic evolution and palaeoenvironmental changes. The study reveals the major regression of the proto-Paratethys Sea, the transition from marine to continental-lacustrine sedimentation, and the role of tectonic and eustatic forces in controlling the late Paleogene transgression regression. The findings provide insights into the sedimentary response to Paleogene sea-level change and tectonic events in Central Asia.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Anthropology
Catherine J. Llera Martin, Kenneth D. Rose, Adam D. Sylvester
Summary: This study examines the talar and calcaneal morphology of early Eocene primate fossils from the Vastan lignite mine in India to refine their locomotor reconstructions. The results show that locomotor behavior can be predicted from the morphology of these bones.
JOURNAL OF HUMAN EVOLUTION
(2022)
Article
Ecology
Sivaraj Sigamani, Prabhu Kolandhasamy, Durga Prasad Behera, Palanivel Partha Sarathy, Rachna Chandra, Nada H. Aljarba, Tahani Mohamad AL-Hazani, Meivelu Moovendhan, Elangovan Dilipan
Summary: This study assessed the carbon sequestration potential of Avicennia marina in the Gulf of Kutch, Gujarat, India. The mean above-ground biomass was 96.9 Mg ha-1 and below-ground biomass was 19.6 Mg ha-1. The Gulf of Kutch had a mean total biomass of 116.5 Mg ha-1, with vegetation carbon stock of 54.1 Mg C ha-1 and soil carbon stock of 25.87 Mg C ha-1. Among the five creeks, Navlakhi had the highest total biomass and vegetative carbon stock.
REGIONAL STUDIES IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Xiuyan Liu, Alexandre Tarantola, Honghan Chen, Yahao Huang, Zhongrui Wu, Junjia Fan, Majid Safaei-Farouji, Mehdi Ostadhassan
Summary: By measuring fluid inclusions in halite samples from the Qianjiang Formation in the Jianghan Basin, it was found that the temperature fluctuations in the middle Eocene were similar to those in Death Valley, indicating the presence of a monsoon climate during that time.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Sandor Kormos, Andrea Varga, Bela Raucsik, Georgina Lukoczki, Balazs Geza Radovics, Nikoletta Papp, Istvan Futo, Felix Schubert
Summary: The quality of reservoirs in the Hungarian Palaeogene Basin, comprised of mixed siliciclastic-carbonate sequences, is strongly controlled by diagenetic processes. The early diagenetic calcite neomorphism causes lateral homogeneity, while early meteoric water incursion enhances reservoir properties through the development of dissolution pores, resulting in vertical reservoir heterogeneity. The deterioration of porosity is influenced by the formation of kaolinite, burial calcite, quartz, dolomite and minor illite cement. Temperature increase during burial, changes in fluid chemistry, and cementation processes also contribute to reservoir heterogeneity.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
J. Jaballah, J. J. G. Reijmer, A. El-Husseiny, J. Le Goff, A. Hairabian, A. Slootman
Summary: This study is crucial for understanding the heterogeneities and spatial distribution of pore types in different Cretaceous platform to deep-water carbonates, as well as the different petrophysical signatures. The data also provide insights into possible variations in reservoir quality and seismic signature of these types of carbonates in subsurface reservoirs.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Linlin Chen, Weiyudong Deng, Tao Su, Shufeng Li, Zhekun Zhou
Summary: The sclerophyllous evergreen broad-leaved forests in the Hengduan Mountains are mainly composed of sclerophyllous oak trees from the Quercus section Heterobalanus. The distribution and development of these forests are closely associated with the Qinghai-Tibetan Plateau. Research has shown that the origin of these oak trees may be much older than previously believed, dating back to the late Eocene period. The expansion of cooler and drier habitats, along with stabilizing selection, has contributed to the spread and development of this oak tree section through time, contrary to previous hypotheses.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Geology
Lydia R. Bailey, Jason Kirk, Sidney R. Hemming, Robert W. Krantz, Peter W. Reiners
Summary: This study reveals a widespread phase of fault-related fluid migration and mineralization in the Paradox Basin of the Colorado Plateau, USA. Through analyzing the K-Ar dates of clay-rich fault gouge, the researchers found statistically overlapping dates of authigenic illite formation on different faults, indicating a close temporal relationship between fault gouge formation, copper mineralization, and red-bed bleaching. This raises questions about the drivers of Eocene fluid flow.
Book Review
Geosciences, Multidisciplinary
Santanu Banerjee
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2022)
Article
Geosciences, Multidisciplinary
Tathagata Roy Choudhury, P. V. Sunder Raju, Tehreen Shaikh, Santanu Banerjee
Summary: This study presents an assessment of the alternate fertilizer potential of glauconite deposits in India and provides simple beneficiation methods. It shows that although glauconite content is low, it can be enhanced through methods like sieving and electromagnetic separation.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2022)
Article
Geochemistry & Geophysics
Pragya Singh, Santanu Banerjee, Kanchan Pande, Satadru Bhattacharya, Subham Sarkar, Emilia Le Pera
Summary: The formation of green celadonite in a nonmarine environment has been discovered. It is formed by the alteration of plagioclase and pyroxene, and precipitation within intergranular pores, accompanied by the formation of zeolite. The mineral chemistry is similar to glauconite but shows distinct differences in XRD, SEM, and spectroscopy analysis.
Article
Geochemistry & Geophysics
Tathagata Roy Choudhury, Santanu Banerjee, Sonal Khanolkar, Sher Singh Meena
Summary: This study characterizes the limestone-green shale alternation in the Giral Member of the Barmer Basin, which corresponds to a marine flooding event after the Paleocene-Eocene transition. The glauconite in this layer has a 'nascent' to 'slightly evolved' character and shows interstratification. Its chemical composition is unusual, with high Al2O3 and Fe2O3 contents, and a high Na2O indicates a possible soda-rich pore water formed by the dissolution of alkaline volcanic minerals. The formation of glauconite in the Giral Member could have contributed to the Fe-sequestration cycle in the Early Eocene shelves.
Article
Chemistry, Multidisciplinary
Maxim Rudmin, Santanu Banerjee, Boris Makarov, Kanipa Ibraeva, Alexander Konstantinov
Summary: This research presents the mechanical creation of smart fertilizers using the planetary milling technique. The study shows intercalation between urea and mineral in the created fertilizers, resulting in slower release rates of nitrogen compared to traditional urea fertilizers. Different forms of nitrogen within the fertilizers affect the quality and quantity of oat yield.
APPLIED SCIENCES-BASEL
(2022)
Article
Geography, Physical
Tathagata Roy Choudhury, Sonal Khanolkar, Santanu Banerjee
Summary: Glauconite formation is influenced by warm climate, with the highest abundance occurring during the Paleogene warm climatic intervals. Glauconite exists as pellets and infillings within the pores of bioclasts, with varying chemical compositions. The formation of glauconite is influenced by factors such as rapid transgression, reduced sedimentation rate, enhanced continental weathering, and enriched nutrient supply, which promote organic growth and facilitate the fixation of iron into the glauconite structure. However, rapid and extreme hyperthermal events inhibit glauconite formation.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geosciences, Multidisciplinary
Sabyasachi Mandal, Tathagata Roy Choudhury, Avik Das, Subir Sarkar, Santanu Banerjee
Summary: This study reveals the formation mechanism of glauconite in the Lower Bhander Sandstone of the Vindhyan Basin in Late Proterozoic India, as well as its role in the sedimentary environment changes caused by tectonic activity.
PRECAMBRIAN RESEARCH
(2022)
Article
Multidisciplinary Sciences
Andre Baldermann, Santanu Banerjee, Gyorgy Czuppon, Martin Dietzel, Juraj Farkas, Stefan Lohr, Ulrike Moser, Esther Scheiblhofer, Nicky M. Wright, Thomas Zack
Summary: Retrograde clay mineral reactions, particularly glauconite formation, play a significant role in element sequestration in marine sediments. The study reveals that glauconite formation in shallow marine environments leads to substantial element sequestration, with sequestration rates two orders of magnitude higher than deep-sea settings. It is estimated that global uptake of K, Mg, Al, Fe, and Si through glauconite formation in shallow-water environments is half of the estimated Mesozoic elemental flux.
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
Maxim Rudmin, Santanu Banerjee, Ekaterina Sinkina, Alexey Ruban, Natalia Kalinina, Pavel Smirnov
Summary: A detailed study of the cement and matrix of ooidal ironstones in the Bakchar deposit in Western Siberia was conducted to evaluate the factors influencing ore-forming processes. The study revealed the presence of two varieties of siderite with distinct morphologies, chemical and isotopic compositions, and types of fluid inclusions. The formation of siderite in the ironstones is attributed to the combined influence of methane flux and seawater. The distribution of clay minerals in different zones of the ore deposit reflects the varying influx of metal- and methane-bearing fluids.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Maxim Rudmin, Santanu Banerjee, Prokopiy Maximov, Andrey Novoselov, Yaroslav Trubin, Pavel Smirnov, Adam Abersteiner, Dongjie Tang, Alexey Mazurov
Summary: This study investigates the authigenically formed Late Cretaceous and Paleogene marine ironstones in Western Siberia (Russia) based on petrographic and spectroscopic investigations. The study found that the marine succession in these formations primarily comprises ooidal or peloidal ironstones formed predominantly by abiogenic precipitates with subordinate microbial signatures.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Tathagata Roy Choudhury, Pragya Singh, Arpita Chakraborty, Santanu Banerjee
Summary: The late Paleocene-early Eocene warm greenhouse conditions led to the formation of abundant authigenic glauconite in shallow marine sediments worldwide. The Valia and Vastan lignite mines contain two distinct varieties of Fe-silicate formation, glauconite and chamosite. The formation of these minerals was influenced by factors such as oxygen conditions, organic matter oxidation, and freshwater influx into the depositional environment.
Review
Geosciences, Multidisciplinary
Pragya Singh, Santanu Banerjee, Tathagata Roy Choudhury, Satadru Bhattacharya, Kanchan Pande
Summary: Celadonite and glauconite share similar physical, chemical, and mineralogical characteristics. The formation of both minerals requires oxygen-depleted conditions and the uptake of Fe into their structure. While glauconite is more commonly found in marine deposits, celadonite can form in marine and non-marine environments by altering intermediate to mafic rocks. Both minerals are more commonly found in the Mesozoic and Cenozoic, potentially due to extensive volcanism. The composition of celadonite and glauconite is influenced by the availability of cations in the pore water micro-environment, and they exhibit subtle differences in X-ray diffraction parameters and Fourier transform infrared spectra.
JOURNAL OF PALAEOGEOGRAPHY-ENGLISH
(2023)
Article
Chemistry, Physical
Maxim Rudmin, Adrian Lopez-Quiros, Santanu Banerjee, Alexey Ruban, Michail Shaldybin, Pavel Bernatonis, Pragya Singh, Aigerim Dauletova, Prokopy Maximov
Summary: This study investigates the origin and formational conditions of clay minerals in early Devonian volcanics within the Byskar Series of the Minusa Depression. The phyllosilicates, including illite, glauconite, smectite, and chlorite, formed through diagenetic transformation after eruptive phases. The evolution trends of the phyllosilicates depend on the composition of the volcanic substrate.
APPLIED CLAY SCIENCE
(2023)
Article
Geology
Muhammad Riaz, Santanu Banerjee, Khalid Latif, Ziliang Liu, Mohamed S. Ahmed, Douaa Fathy
Summary: This study reviews the microstructure of ooids and explains the origin of microstructures in Cambrian ooids in the North China Platform. Factors controlling the morphology and mineral composition of ooid are complex and involve physical, chemical and biological processes. The review reinforces the biochemical hypothesis for the origin of ooids and proposes the sequence of microbial activities that involves the role of amorphous calcium carbonate (ACC) in ooid formation.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Paleontology
Christer Dominique Pereira, Sonal Khanolkar, Santanu Banerjee, Ercan Ozcan, Pratul Kumar Saraswati
Summary: This study examined the larger benthic foraminiferal microfacies and carbon isotopes of Late Paleocene-Early Eocene sections in Meghalaya, Northeast India. The results suggest a major change in hydrological cycle during the extreme warmth that followed the PETM, indicated by the abrupt shift in the depositional setting. The formation of Umlatdoh Limestone during the Early Eocene was dominated by Halimeda, Alveolina, and miliolids.
JOURNAL OF FORAMINIFERAL RESEARCH
(2022)
