Article
Geosciences, Multidisciplinary
J. Amal Dev, J. K. Tomson, T. Vijaya Kumar, Nilanjana Sorcar
Summary: This study focuses on the mafic granulites in the Precambrian Southern Granulite Terrane (SGT) of south India, which are closely associated with high- to ultrahigh-temperature (HT-UHT) granulites. The research indicates that the mafic granulites are formed by partial melting of a subduction-modified enriched mantle source, with a composition involving reworked melting sources from Archean and Proterozoic components. The zircon U-Pb geochronology constrains the emplacement of mafic granulites between 612 Ma and 625 Ma, and their subsequent metamorphism between 581 Ma and 531 Ma, which overlaps with the timing of HT-UHT metamorphism in the Kambam UHT belt. The results propose an alternative heat source for the formation of HT-UHT granulites in the Kambam UHT belt.
GEOLOGICAL MAGAZINE
(2023)
Article
Geosciences, Multidisciplinary
Bing Yu, M. Santosh, Toshiaki Tsunogae, Cheng-Xue Yang, Sung Won Kim
Summary: The Southern Granulite Terrane in India is an important geological zone that contains UHT granulites formed at high pressure and temperature conditions. The study of these rocks provides insights into the formation and evolution of the Gondwana supercontinent as well as post-orogenic processes.
GEOLOGICAL JOURNAL
(2022)
Article
Geology
J. Amal Dev, Nilanjana Sorcar, Sneha Mukherjee, J. K. Tomson
Summary: This study focuses on the formation process of rare high- to ultrahigh-temperature metamorphic rocks in the Madurai block of southern India, revealing the characteristics of metamorphic conditions and tectonic evolution history through the analysis and constraint of rock samples.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Yanfei Xia, Changqing Yin, Shoufa Lin, Jian Zhang, Jiahui Qian, Shangjing Wu, Jingna Liu
Summary: Minor lenses of high-pressure mafic granulites were discovered in the Badu Complex of the East Cathaysia terrane in South China. These rocks underwent three metamorphic stages and exhibited two decompression processes. Zircon U-Pb dating suggests high-pressure metamorphism occurred at approximately 240-244 Ma.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Computer Science, Interdisciplinary Applications
Ruby C. Marsden, Christopher L. Kirkland, Martin Danisik, Matthew L. Daggitt, Ung-San Ahn, Bjarne Friedrichs, Noreen J. Evans
Summary: A new analytical and data reduction workflow for zircon U-Th disequilibrium analysis using SHRIMP II was developed in this study, with a case study on trachytic samples from Jeju Island demonstrating the effectiveness of the new approach.
COMPUTERS & GEOSCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Bing Yu, M. Santosh, T. Amaldev, Yirang Jang, Cheng-Xue Yang
Summary: This study investigates the mafic granulites and associated rocks from the Coorg Block in southern India to gain insights into the crust-mantle dynamics and the subduction-accretion-collision history. Through petrology, mineral chemistry, conventional thermobarometry and computed pseudosections, whole-rock geochemistry, and zircon U-Pb and Lu-Hf isotopes analyses, the researchers traced the magmatic evolution and metamorphism of these rocks. The findings suggest that the rocks underwent high-pressure metamorphism followed by cooling, and the parent magmas were derived from both juvenile and reworked sources. This study contributes to the understanding of geodynamic processes and continent formation in the Early Earth.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Han Wang, Xu-Ping Li, Juergen Reinhardt, Fan-Mei Kong, Hans-Peter Schertl, Guang-Ming Sun
Summary: The Bushmanland Domain in the western Namaqua-Natal Metamorphic Province includes Paleoproterozoic to Mesoproterozoic intrusives and metamorphosed volcano-sedimentary supracrustal rocks. High-grade metamorphism is prevalent, with evidence of peak conditions reaching transitional to ultrahigh temperatures. The zircon and monazite geochronology reveals two distinct age groups, indicating both an older metamorphic cycle predating the established 1040-1020 Ma Namaquan cycle, and a Late Mesoproterozoic group confirming the similar to 1040-1020 Ma metamorphic age associated with the Namaquan orogeny.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Hui Liu, Hong-Fu Zhang
Summary: High-pressure mafic granulites along the Trans-North China Orogen in the northern segment display similar formation ages and underwent comparable high-pressure granulite facies metamorphism around 1.9 Ga. The isotopic compositions of metamorphic zircons suggest the involvement of high Hf-176/Hf-177 ratio metamorphic fluids in the process.
PRECAMBRIAN RESEARCH
(2021)
Article
Geology
Jesus Munoz-Montecinos, Aitor Cambeses, Samuel Angiboust
Summary: This study investigates the geology of Infiernillo beach and Punta de Lobos in Pichilemu, Chile, and finds that they represent the same geological unit formed by the interaction between continental sediments and oceanic crust during subduction at high pressure-low temperature conditions. The findings have important implications for understanding the mechanism of earthquakes.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
D. R. Mole, P. C. Thurston, J. H. Marsh, R. A. Stern, J. A. Ayer, L. A. J. Martin, Y. J. Lu
Summary: This study analyzed geochemical data from the southeast Superior Craton in Canada to investigate the continental crust formation and evolution in the Neoarchean era. The findings suggest a continental-rift setting driven by plume magmatism followed by a transition to north-dipping subduction, indicating the possible onset of plate tectonics around 2.7 billion years ago.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Sampriti Basak, Eric Hasenstab, Santanu Kumar Bhowmik, Axel Gerdes, Somnath Dasgupta, Carsten Muenker, Gr. Ravindra Kumar, Sumit Chakraborty
Summary: Studying high-grade metamorphic rocks in a crustal-scale shear zone can provide insights into the Archean tectonic processes. Petrological investigations reveal different compositions and reaction histories of these rocks. By using thermobarometry, phase equilibria modeling, and geochronology, a multi-stage P-T-t history was reconstructed, suggesting an early form of peel-back styled orogenesis and intracrustal differentiation.
JOURNAL OF PETROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Maibam Bidyananda, Kakchingtabam Anil Sharma, Anil D. Shukla, Argyrios Kapsiotis, Elena Belousova
Summary: The Indo-Myanmar Range is believed to be a remnant eastward-dipping subduction zone, with rodingites in the Indo-Myanmar Ophiolite Belt exhibiting complex variations in mineral assemblages and chemical compositions, classified into different categories based on their occurrence, minerals, and chemical composition. The formations of different rodingite types are likely related to seawater infiltration or serpentinization of oceanic lithosphere, with their mineralogy indicating formation temperatures of about 435 to 200 degrees Celsius, corresponding to greenschist facies.
GEOLOGICAL JOURNAL
(2022)
Article
Geochemistry & Geophysics
Xiaoying Liao, Liang Liu, Mingguo Zhai, Sha Liang, Wenqiang Yang, Lei Kang, Yongsheng Gai, Chengli Zhang
Summary: The newly identified garnet-corundum silica-undersaturated pelitic granulites in the Mianlue Tectonic Zone of the South Qinling belt, central China, preserve a distinct mineral assemblage and provide evidence for the metamorphic evolution of the zone. The granulites underwent multiple stages of garnet growth under different conditions, and the pressure-temperature evolution can be inferred from P-T pseudosection analysis and petrographic observations. The geochronological data suggest a complete metamorphic history, including crustal thickening during continental collision/subduction and subsequent exhumation and cooling during the early Mesozoic.
Article
Geology
Guanzhong Shi, Bastian Wauschkuhn, Lothar Ratschbacher, Chuanbo Shen, Hongyang Fu, Sonja Froelich
Summary: Detrital zircon geochronology is a useful tool for provenance analysis, which involves comparing the age spectra of zircons in sedimentary rocks with those of potential source rocks to determine their origin. This method can be enhanced by considering additional proxies such as trace elements and lattice damage to supplement the provenance interpretation. Improved prediction of source rocks is valuable for provenance analysis, source-to-sink reconstruction, and tectonic-setting discrimination.
SEDIMENTARY GEOLOGY
(2023)
Article
Geology
Yan Yang, Chenyue Liang, Franz Neubauer, M. Santosh, Jan D. Kramers, Changqing Zheng, Huiming Zhang
Summary: This study re-evaluates the Central Zone of the Limpopo Belt in southern Africa, revealing early Precambrian tectonic processes. Based on petrology, U-Pb zircon ages, and major and trace element data of high-pressure mafic granulites in the Sand River area, the research identifies protoliths formed at a mid-ocean ridge around 2.8 Ga. Three metamorphic stages are recognized in the studied samples, indicating a clockwise P-T path and important information about Neoproterozoic collisional orogeny, independent orogeny, and subsequent exhumation and cooling. U-Pb zircon dating shows protolith formation prior to 2.72 Ga and metamorphic ages of 2.72 Ga (peak) and 2.0 Ga (post-peak cooling) for the mafic granulites. The metamorphic evolution reconstructed in this study suggests a Neoarchean collision between the Kaapvaal and Zimbabwe cratons, followed by a discrete Paleoproterozoic orogenic overprint and post-orogenic exhumation and cooling.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Divya Prakash, Manish Kumar, Swapnil Kumar Rai, Chandra Kant Singh, Saurabh Singh, Roopali Yadav, Srishti Jaiswal, Vedika Srivastava, Manoj Kumar Yadav, Sourav Bhattacharjee, Pradip Kumar Singh
Summary: The Diwani Hill granulites in the South Delhi Terrane represent deeper crustal rocks, with P-T evolution constrained to peak pressure and temperature of 6.7 kbar and 750°C. The rocks in the SDT are a mixture of charnockites, granites, calc-granulites, and hercynite-quartz-bearing pelitic granulites. Geological evidence suggests that the South Delhi basin may have been a remnant of the proto-Mozambique Ocean in NW India, closed due to subduction and subsequently uplifted during the Neoproterozoic era.
PRECAMBRIAN RESEARCH
(2021)
Article
Environmental Sciences
Manish Soni, Amit Singh Chandel, Sunita Verma, Swagata Payra, Divya Prakash, Brent Holben
Summary: This study investigates the aerosol climatology over four AERONET sites on different continents, revealing high aerosol concentration and dominance of dust aerosols in locations like Jaipur and Ilorin, while sites in America and Australia are relatively pristine. The radiative forcing and efficiency also vary significantly between Africa-Asia and America-Australia sites.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Swapnil Kumar Rai, Divya Prakash, Roopali Yadav, Srishti Jaiswal, R. S. Kumar, Chandra Kant Singh
Summary: An infrequent occurrence of sapphirine has been reported from metapelite rocks of the Cardamom hills of South India, indicating a new locality with significant implications for crustal evolution.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2021)
Article
Geosciences, Multidisciplinary
Suparna Tewari, Divya Prakash, Manoj Kumar Yadav, Vedika Srivastava
Summary: The Sikkim Himalaya consists mainly of Proterozoic metapelites and metavolcanics, with a wide range of pressure and temperature in the metamorphic rocks. The rocks in the study area likely resulted from a single metamorphic event with continuous changes in pressure and temperature.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Roopali Yadav, Divya Prakash, Swapnil Kumar Rai, Manoj K. Yadav, Pradip Kumar Singh, Srishti Jaiswal
Summary: The study of the garnet-cordierite gneiss from Kosavankovilpatti area in India reveals a metamorphic history characterized by lower temperature and pressure conditions, likely resulting from denudation of the thickened continental crust. This suggests that the lower continental crust in this region evolved without attaining ultrahigh-temperature conditions.
GEOLOGICA CARPATHICA
(2021)
Article
Geosciences, Multidisciplinary
Roopali Yadav, Divya Prakash, Swapnil Kumar Rai, Manoj Kumar Yadav, Srishti Jaiswal, Saurabh Singh, Pradip Kumar Singh, Manish Kumar, Chandra Kant Singh
Summary: The study of ultrahigh temperature metamorphic terranes in the Madurai block of South India reveals extreme crustal metamorphism during the Late Neoproterozoic, characterized by the texture of the sapphirine + quartz association. Zircon dating and P-T pseudosection modeling provide insights into the global Pan-African crustal evolution event and multiple sources of Neoarchean to Paleoproterozoic age in the region. The peak metamorphic temperature and pressure are estimated to be -960 degrees C and -9.2 kbar, respectively.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geology
Aditya Kharya, Himanshu K. Sachan, Christopher J. Spencer, Koushik Sen, Divya Prakash, Shashi Ranjan Rai, Vikash Kumar
Summary: This study focuses on the fluid activity in the Zildat and Shergol ophiolitic melanges of the Indus Suture Zone, presenting fluid-inclusion and isotope geochemistry of quartz-calcite veins to decipher their origin and evolution. The isotopic analysis of calcite veins indicates a mixing model of marine and primitive-mantle fields, with a mid-ocean ridge basalt fluid source for the Zildat veins and enriched-mantle and depleted-MORB-mantle rocks as potential sources for the Shergol veins. The vein-forming fluids were likely introduced into fractures in the host rocks as a result of deformation, with emplacement depths estimated at approximately 2.5 km and temperatures between 200-400 degrees C.
JOURNAL OF GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Pradip K. Singh, Sanjeet K. Verma, Vinod K. Singh, Juan A. Moreno, Elson P. Oliveira, Xian-Hua Li, Vivek P. Malviya, Divya Prakash
Summary: This study provides comprehensive insights into the crust-mantle evolution, reworking, and cratonization of the Bundelkhand Craton during the Archean Eon, reporting new findings such as two discrete episodes of Neoarchean TTG magmatism and an older TTG gneiss than previously thought. The research also suggests that the Bundelkhand Craton did not fully amalgamate until around 2.50 Ga.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Manish Kumar, D. Prakash, C. K. Singh, M. K. Yadav, S. Tewari, Pradip K. Singh, B. Mahanta
Summary: The Diwani hills in north Gujarat, located SE of Balaram-Abu Road, consist of diverse Precambrian metamorphic and igneous rocks. These rocks show complex petrological characteristics and are believed to have originated from anhydrous metamorphism under pyroxene granulite facies. The P-T-X pseudosection modelling and electron microprobe dating provide evidence for a Neoproterozoic metamorphic event in the Aravalli-Delhi Mobile Belt.
GEOLOGICAL MAGAZINE
(2023)
Article
Environmental Sciences
Divya Prakash, Sunita Verma, Swagata Payra, Vivek Kumar
Summary: This study identified the impact of a solar eclipse on meteorological parameters and trace gases using statistical analyses. The solar eclipse led to a rapid decrease in solar direct radiation, a decrease in temperature, and a slight increase in relative humidity. The eclipse also had an inverse correlation with the variations in trace gases.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Saurabh Singh, Divya Prakash, Aditya Kharya, Himanshu K. Sachan
Summary: This study investigates the tectono-metamorphic evolution of the Mandikota area in the Eastern Ghats Mobile Belt using various methods including reaction textures, geothermobarometry, geochronology, fluid inclusions, and pseudosection modelling. The results reveal multiple metamorphic stages, including Ultra-High Temperature metamorphism, and a new age (-600 Ma) associated with the Pan-African orogeny. The study highlights the complexity and controversy of the tectono-metamorphic history in the Eastern Ghats Mobile Belt.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Ankita A. A. Singh, B. P. Singh, D. Prakash, C. K. Singh
Summary: The present investigation finds that the Basal Conglomerate in Sonbhadra district, central India is similar to the basal part of the Vindhyan Supergroup, with a thickness of 2-3 meters. The conglomerate is composed of fragments of different rock types supported by a sandy matrix. It contains quartzite, jasper, phyllite, and slate pebble-sized clasts, mostly dominated by quartzite. The sandy matrix is rich in quartz, chert, and iron oxides, which were produced through chemical weathering.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2023)
Article
Multidisciplinary Sciences
Saurabh Singh, Divya Prakash, Chandra Kant Singh, Vedika Srivastava, Manoj Kumar Yadav, Pradip Kumar Singh, Manish Kumar
Summary: This study provides evidence for the coexistence of sapphirine + quartz and the composition characteristics of sapphirine-bearing granulites from the Kothuru area in the Eastern Ghats Mobile Belt, India. The study area consists of granulite facies rocks, including different types of granulites and sapphirine-spinel-quartz-bearing rocks. The mineral chemistry and petrographic study reveal the occurrence and distribution of minerals in various reaction textures. The P-T path of the sapphirine-bearing granulites suggests a decompressional trajectory influenced by thrust processes, indicating distinctive ultra-high temperature metamorphic signatures in the studied area.
Proceedings Paper
Materials Science, Multidisciplinary
Rituraj Singh Rathore, Harshwardhan Singh Chouhan, Divya Prakash
Summary: The construction industry generates a significant amount of plastic waste globally, impacting the environment and organisms. Proper disposal and utilization of plastic waste is crucial to reduce environmental issues. Reusing plastic waste as building materials could be a solution to address both environmental concerns and resource consumption in construction.
MATERIALS TODAY-PROCEEDINGS
(2021)
Article
Multidisciplinary Sciences
D. Prakash, C. K. Singh, R. S. Kumar, R. Yadav, S. K. Rai, M. K. Yadav, Pradip K. Singh, S. Jaiswal
Summary: Kornerupine has been discovered in quartzo-feldspathic gneisses near Kunjan town in Salem district, Tamil Nadu, India, showing well-preserved retrogression texture. The common stable assemblage in these gneisses includes orthopyroxene, cordierite, kornerupine, biotite, spinel, K-feldspar, and plagioclase. The P-T conditions derived using the winTWQ program suggest temperatures around 800 degrees C and pressures around 6 kbar for kornerupine-bearing assemblages in this area.
