Article
Geosciences, Multidisciplinary
Yousef Zoleikhaei, Rajat Mazumder, Peter A. Cawood, Shuvabrata De
Summary: Archean cratons provide valuable information about Earth's early history. This study focuses on the Singhbhum Craton in India and examines the magmatism and basin formation events in its northern margin. By analyzing the ages and geochemical characteristics of granite and sedimentary rocks, the study reveals the role of crustal melting in magma genesis and the sources of terrigenous sediments. The findings contribute to our understanding of the early geological evolution of the Earth.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Sameer Ranjan, Dewashish Upadhyay, C. Srikantappa
Summary: This study utilized the U-Pb-Hf isotope composition of detrital zircon to investigate the geological history and rock formation in the Western Dharwar Craton. The analysis revealed different periods of crust formation and extraction, as well as detrital zircon with both radiogenic and crust-like Hf isotopic compositions.
PRECAMBRIAN RESEARCH
(2022)
Article
Multidisciplinary Sciences
C. L. Kirkland, M. I. H. Hartnady, M. Barham, H. K. H. Olierook, A. Steenfelt, J. A. Hollis
Summary: Through analyzing Hf isotopic data in detrital zircons from modern stream sediment samples in West Greenland, a study reveals successive reworking of felsic Hadean-to-Eoarchean crust, indicating a crustal rejuvenation coincident with peak mantle potential temperatures. This suggests a planetary shift towards more juvenile Hf values over time.
NATURE COMMUNICATIONS
(2021)
Article
Geology
Bruna Saar Almeida, Carlos Augusto Sommer, Farid Chemale, Antonio Joao Paes de Barros, Mauro Cesar Geraldes
Summary: This paper presents zircon U-Pb, REE and Hf data for Paleoproterozoic felsic volcanic rocks from the Colider Group in the southwestern Amazonian Craton, revealing geographical differences in the origin and age of the rocks.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Kai Lei, Ya-Fei Wang, Qing Zhang, Jia-Hui Zhang, Wei Jin, Pei-Xi Zheng, Xian-Hua Li
Summary: The Archean Anshan Complex in northeastern China, with its well-preserved ca. 3.8 Ga outcrops, provides important insights into the early evolution of the Earth. Through detailed geological mapping and integration of various isotopic and geochemical data, this study established a geochronological framework for the complex, shedding light on its origins, tectonic setting, and differentiation processes in the early Earth.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Hugo K. H. Olierook, Christopher L. Kirkland, Milo Barham, Matthew L. Daggitt, Julie Hollis, Michael Hartnady
Summary: The study presents a technique to rapidly extract meaningful core model ages from core-rim mixtures, along with a Python-based program for easy application of this approach. The efficacy of the technique is demonstrated on a detrital sample from East Greenland, recovering dates of detrital cores from core-rim mixtures. Caution is advised against using this technique without checking the appropriateness of the underlying assumptions, and chemical means are provided for evaluating the assumptions.
Article
Geochemistry & Geophysics
Arathy Ravindran, Klaus Mezger, S. Balakrishnan, Jasper Berndt, Sameer Ranjan, Dewashish Upadhyay
Summary: Combining U-Pb zircon ages with Hf-Sr-Pb isotopes, this study provides insights into the petrogenetic evolution of the continental crust in the western Dharwar Craton, India. The research reveals the presence of the oldest felsic crustal material in the region, and the formation of major felsic continental crust during a specific time interval. The study also suggests that the Mesoarchean felsic crust in the Dharwar Craton was formed through differentiation of melts from different source rocks and incorporated reprocessed crustal material over time.
Article
Geosciences, Multidisciplinary
E. V. S. S. K. Babu, W. L. Griffin, Roger Norris, Elena Belousova, Suzanne Y. O'Reilly, Y. J. Bhaskar Rao
Summary: This study reveals the characteristics of crustal structure and tectonic history of the Paleo-Mesoarchean Western Dharwar Craton (WDC) and Neoarchean Eastern Dharwar Craton (EDC) in India through the analysis of crustal composition and rock samples. The discovery of zircons with ages exceeding 3.6 billion years in the xenocrystic zircons suggests that ancient upper crustal rocks were transported to lower crust and mantle depths, supporting the collisional under thrusting of the WDC beneath the EDC.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geography, Physical
Jintao Kong, Zhongjie Xu, Rihui Cheng, Liaoliang Wang
Summary: This study analyzed the source areas and transport modes of Lower Jurassic sediments on the South China continental margin, and found that the distribution system was significantly influenced by Paleo-Pacific subduction. Different regions had distinct primary source areas, with the central region being a vast shallow sea in the Early Jurassic due to large-scale transgression.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geochemistry & Geophysics
Myoung Jung Kim, Youngji Ha, Ji Eun Choi, Kye-Hun Park, Yong-Sun Song, Shuwen Liu
Summary: The Seochangni Formation in central South Korea is characterized by a main detrital zircon age range of Late Paleoproterozoic to Mesoproterozoic, with a lack of older age components typically found in basement rocks of the Korean peninsula. This suggests a correlation with similar age patterns in other regions, indicating a common crustal evolution since the Paleoproterozoic.
Article
Geochemistry & Geophysics
Hartwig E. Frimmel, Rajarshi Chakravarti, Miguel A. S. Basei
Summary: New age and isotope data from detrital zircon grains in quartz-pebble conglomerates in the Singhbhum Craton provide insights into zircon provenance and sediment deposition. This research has important implications for the discovery of gold and uranium deposits in the region.
MINERALIUM DEPOSITA
(2022)
Article
Geosciences, Multidisciplinary
Surjyendu Bhattacharjee, Jacob A. Mulder, Subhajit Roy, Priyadarshi Chowdhury, Peter A. Cawood, Oliver Nebel
Summary: The researchers conducted a detailed study of the Simlipal volcano-sedimentary succession in the Singhbhum craton of eastern India, reporting the first detrital zircon U-Pb ages from this succession. The lithostratigraphic analysis and petrographic study indicated deposition in a tidally-influenced marginal marine setting, with detrital zircon data supporting a maximum depositional age around 3.08 Ga and revealing source ages peaks. The study also documented the involvement of Hadean crust and the tectonothermal imprint of a late Mesoproterozoic to early Neoproterozoic orogeny on the Singhbhum craton.
PRECAMBRIAN RESEARCH
(2021)
Article
Geology
HongJin Chen, YanJing Chen
Summary: This study investigates the giant Shapinggou porphyry molybdenum deposit in Jinzhai county, Anhui province. New zircon U -Pb age data and element geochemistry analysis are used to determine its formation age, rock type, and tectonic setting. The results show that the deposit has the characteristics of a collision-type porphyry molybdenum deposit, with molybdenum mineralization closely associated with late-stage shallow-seated granitic intrusions or breccia pipes. Furthermore, the study provides new insights into the crustal source and formation mechanism of the deposit.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Wen Zhang, Fulai Liu, Chaohui Liu
Summary: The Qiaotou Formation in southern Jilin and Liaoning Provinces at the eastern margin of the North China Craton has a depositional age of 1.1-0.9 billion years ago. The U-Pb age dating of detrital zircons revealed peaks at various ages, with younger zircons possibly derived from the North China Craton, while Mesoproterozoic zircons' origin remains uncertain.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geochemistry & Geophysics
Alessandro Maltese, Klaus Mezger, Dewashish Upadhyay, Jasper Berndt, Erik E. Scherer
Summary: Research on TTG suites reveals complex petrogenetic processes, predominantly derived from melting of garnet-rich protoliths at multiple depths. Data indicate that the Hf isotopic compositions of TTG rocks and their zircons are associated with late-stage fractional melting processes.
Article
Geosciences, Multidisciplinary
Ankeeta Amonkar, Sridhar D. Iyer, Elapavalooru V. S. S. K. Babu, Natarajan Shailajha, Areef Sardar, S. Manju
Summary: The occurrence of Fe-rich spherules in the Central Indian Ocean Basin is influenced by tectonic settings and hydrogeological features, suggesting they are formed through molten fuel-coolant interaction.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2021)
Article
Biology
Salwa Naushin, Viren Sardana, Rajat Ujjainiya, Nitin Bhatheja, Rintu Kutum, Akash Kumar Bhaskar, Shalini Pradhan, Satyartha Prakash, Raju Khan, Birendra Singh Rawat, Karthik Bharadwaj Tallapaka, Mahesh Anumalla, Giriraj Ratan Chandak, Amit Lahiri, Susanta Kar, Shrikant Ramesh Mulay, Madhav Nilakanth Mugale, Mrigank Srivastava, Shaziya Khan, Anjali Srivastava, Bhawana Tomar, Murugan Veerapandian, Ganesh Venkatachalam, Selvamani Raja Vijayakumar, Ajay Agarwal, Dinesh Gupta, Prakash M. Halami, Muthukumar Serva Peddha, Gopinath M. Sundaram, Ravindra P. Veeranna, Anirban Pal, Vinay Kumar Agarwal, Anil Ku Maurya, Ranvijay Kumar Singh, Ashok Kumar Raman, Suresh Kumar Anandasadagopan, Parimala Karuppanan, Subramanian Venkatesan, Harish Kumar Sardana, Anamika Kothari, Rishabh Jain, Anupama Thakur, Devendra Singh Parihar, Anas Saifi, Jasleen Kaur, Virendra Kumar, Avinash Mishra, Iranna Gogeri, Geethavani Rayasam, Praveen Singh, Rahul Chakraborty, Gaura Chaturvedi, Pinreddy Karunakar, Rohit Yadav, Sunanda Singhmar, Dayanidhi Singh, Sharmistha Sarkar, Purbasha Bhattacharya, Sundaram Acharya, Vandana Singh, Shweta Verma, Drishti Soni, Surabhi Seth, Sakshi Vashisht, Sarita Thakran, Firdaus Fatima, Akash Pratap Singh, Akanksha Sharma, Babita Sharma, Manikandan Subramanian, Yogendra S. Padwad, Vipin Hallan, Vikram Patial, Damanpreet Singh, Narendra Vijay Tripude, Partha Chakrabarti, Sujay Krishna Maity, Dipyaman Ganguly, Jit Sarkar, Sistla Ramakrishna, Balthu Narender Kumar, Kiran A. Kumar, Sumit G. Gandhi, Piyush Singh Jamwal, Rekha Chouhan, Vijay Lakshmi Jamwal, Nitika Kapoor, Debashish Ghosh, Ghanshyam Thakkar, Umakanta Subudhi, Pradip Sen, Saumya Ray Chaudhury, Rashmi Kumar, Pawan Gupta, Amit Tuli, Deepak Sharma, Rajesh P. Ringe, D. Amarnarayan, Mahesh Kulkarni, Dhansekaran Shanmugam, Mahesh S. Dharne, Sayed G. Dastager, Rakesh Joshi, Amita P. Patil, Sachin N. Mahajan, Abujunaid Habib Khan, Vasudev Wagh, Rakesh Kumar Yadav, Ajinkya Khilari, Mayuri Bhadange, Arvindkumar H. Chaurasiya, Shabda E. Kulsange, Krishna Khairnar, Shilpa Paranjape, Jatin Kalita, Narahari G. Sastry, Tridip Phukan, Prasenjit Manna, Wahengbam Romi, Pankaj Bharali, Dibyajyoti Ozah, Ravi Kumar Sahu, Elapavalooru Vssk Babu, Rajeev Sukumaran, Aiswarya R. Nair, Prajeesh Kooloth Valappil, Anoop Puthiyamadam, Adarsh Velayudhanpillai, Kalpana Chodankar, Samir Damare, Yennapu Madhavi, Ved Varun Aggarwal, Sumit Dahiya, Anurag Agrawal, Debasis Dash, Shantanu Sengupta
Summary: The Council of Scientific and Industrial Research in India conducted a serosurvey in August and September 2020 to understand the spread of SARS-CoV2 and found that some individuals may be infected with the virus even without symptoms. Personal factors such as high-exposure work, use of public transport, non-smoking, non-vegetarian diet, and blood type B are associated with higher odds of seropositivity.
Article
Geosciences, Multidisciplinary
Abhijeet Mukherjee, Pankaj Tiwari, C. B. Verma, E. V. S. S. K. Babu, Jena Partha Sarathi
Summary: This paper explores the eclogitic xenoliths of KL-2 kimberlite in the Kalyandurg kimberlite cluster in south India, revealing the presence of native gold grains and Au-Pt alloy in the kyanite-bearing eclogite.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2021)
Article
Geosciences, Multidisciplinary
Prantik Mandal, Prakash Kumar, B. Sreenivas, E. V. S. S. K. Babu, Y. J. Bhaskar Rao
Summary: The study focuses on the crustal and lithospheric architecture of different terranes in the Eastern part of the Indian Shield, revealing thinning beneath the SOC and thicker crust with relatively thinner lithosphere beneath the CGGT. The model reflects the imprints of northward subduction of SOC beneath the CGGT in the Precambrian.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
T. Vijaya Kumar, Y. J. Bhaskar Rao, E. V. S. S. K. Babu, B. Sreenivas
Summary: Based on zircon age-Hf isotopic data, multiple episodes of juvenile crust formation in the Archean Singhbhum and Dharwar cratons and the Archean-Proterozoic Southern Granulite Terrain (SGT) over a span of 3.7 billion years have been deciphered. These observations indicated distinct changes in crustal processes, plate tectonics, and magmatic activities over different geological time periods in these terranes.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2021)
Article
Geosciences, Multidisciplinary
Ch Narshimha, V. V. Sesha Sai, U. V. B. Reddy, T. Vijaya Kumar, E. V. S. S. K. Babu, B. Sreenivas, K. S. Subramanyam
Summary: The Punugodu granite pluton in the Eastern Dharwar Craton of Southern India is a Mesoproterozoic alkali feldspar hypersolvus granite with characteristics indicating formation in a shallow crustal level. The presence of rhyodacite xenoliths and hornfelsic texture in the metavolcanic country rocks suggest its possible origin from an oceanic island basalt-like source in an anorogenic, within-plate setting.
GEOLOGICAL MAGAZINE
(2022)
Article
Energy & Fuels
Nihar Ranjan Kar, Devleena Mani, Soumyajit Mukherjee, Swagato Dasgupta, Mohit Kumar Puniya, Ashish Kumar Kaushik, Mery Biswas, E. V. S. S. K. Babu
Summary: Hydrocarbon exploration and production have been taking place in the Barmer basin in Rajasthan, India for over a decade. The Paleocene-Eocene age source rocks and Mesozoic siltstones are being studied for their potential as reservoirs. Lignites in the region suggest a promising potential for conversion into oil and gas. The study focuses on the source rock properties, depositional environments, and hydrocarbon generation potential of lignitic shales and Sarnu siltstones. Results show that the lignites have higher total organic carbon content and lower oxygen index, indicating a reducing depositional environment. The lignites also exhibit a more promising hydrocarbon generation potential compared to the shales, but the shales have a higher thermal maturity. The lignites and shaly lignites from the Giral mine are identified as excellent candidates for easy conversion into hydrocarbon products through artificial techniques.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2022)
Article
Biology
Prateek Singh, Rajat Ujjainiya, Satyartha Prakash, Salwa Naushin, Viren Sardana, Nitin Bhatheja, Ajay Pratap Singh, Joydeb Barman, Kartik Kumar, Saurabh Gayali, Raju Khan, Birendra Singh Rawat, Karthik Bharadwaj Tallapaka, Mahesh Anumalla, Amit Lahiri, Susanta Kar, Vivek Bhosale, Mrigank Srivastava, Madhav Nilakanth Mugale, C. P. Pandey, Shaziya Khan, Shivani Katiyar, Desh Raj, Sharmeen Ishteyaque, Sonu Khanka, Ankita Rani, Promila, Jyotsna Sharma, Anuradha Seth, Mukul Dutta, Nishant Saurabh, Murugan Veerapandian, Ganesh Venkatachalam, Deepak Bansal, Dinesh Gupta, Prakash M. Halami, Muthukumar Serva Peddha, Ravindra P. Veeranna, Anirban Pal, Ranvijay Kumar Singh, Suresh Kumar Anandasadagopan, Parimala Karuppanan, Syed Nasar Rahman, Gopika Selvakumar, Subramanian Venkatesan, Malay Kumar Karmakar, Harish Kumar Sardana, Anamika Kothari, Devendra Singh Parihar, Anupma Thakur, Anas Saifi, Naman Gupta, Yogita Singh, Ritu Reddu, Rizul Gautam, Anuj Mishra, Avinash Mishra, Iranna Gogeri, Geethavani Rayasam, Yogendra Padwad, Vikram Patial, Vipin Hallan, Damanpreet Singh, Narendra Tirpude, Partha Chakrabarti, Sujay Krishna Maity, Dipyaman Ganguly, Ramakrishna Sistla, Narender Kumar Balthu, Kiran A. Kumar, Siva Ranjith, B. Vijay Kumar, Piyush Singh Jamwal, Anshu Wali, Sajad Ahmed, Rekha Chouhan, Sumit G. Gandhi, Nancy Sharma, Garima Rai, Faisal Irshad, Vijay Lakshmi Jamwal, Masroor Ahmad Paddar, Sameer Ullah Khan, Fayaz Malik, Debashish Ghosh, Ghanshyam Thakkar, S. K. Barik, Prabhanshu Tripathi, Yatendra Kumar Satija, Sneha Mohanty, Md Tauseef Khan, Umakanta Subudhi, Pradip Sen, Rashmi Kumar, Anshu Bhardwaj, Pawan Gupta, Deepak Sharma, Amit Tuli, Saumya Ray Chaudhuri, Srinivasan Krishnamurthi, L. Prakash, Ch Rao, B. N. Singh, Arvindkumar Chaurasiya, Meera Chaurasiya, Mayuri Bhadange, Bhagyashree Likhitkar, Sharada Mohite, Yogita Patil, Mahesh Kulkarni, Rakesh Joshi, Vaibhav Pandya, Sachin Mahajan, Amita Patil, Rachel Samson, Tejas Vare, Mahesh Dharne, Ashok Giri, Sachin Mahajan, Shilpa Paranjape, G. Narahari Sastry, Jatin Kalita, Tridip Phukan, Prasenjit Manna, Wahengbam Romi, Pankaj Bharali, Dibyajyoti Ozah, RaviKumar Sahu, Prachurjya Dutta, Moirangthem Goutam Singh, Gayatri Gogoi, Yasmin Begam Tapadar, Elapavalooru V. S. S. K. Babu, Rajeev K. Sukumaran, Aishwarya R. Nair, Anoop Puthiyamadam, Prajeesh Kooloth Valappil, Adrash Velayudhan Pillai Prasannakumari, Kalpana Chodankar, Samir Damare, Ved Varun Agrawal, Kumardeep Chaudhary, Anurag Agrawal, Shantanu Sengupta, Debasis Dash
Summary: Data science has played a crucial role in the COVID-19 pandemic response, and this study demonstrates how a statistical and machine learning approach can be used to discriminate between SARS-CoV-2 infection and immune response to a whole virion vaccine. By analyzing serial antibody data and incorporating an ensemble ML model, the researchers were able to accurately classify potential infections and validate their findings through neutralization assays. This study highlights the importance of real-world vaccine effectiveness assessments for whole virion vaccines.
COMPUTERS IN BIOLOGY AND MEDICINE
(2022)
Article
Geochemistry & Geophysics
Monalisa Mallick, Barnita Banerjee, Tanveer Hassan, Teeda Vijaya Kumar, E. V. S. S. K. Babu, Keshav Krishna, Rohit Kumar
Summary: The present study provides an integrated investigation of the Permian carbonaceous shales from Raniganj sub-basin, focusing on their inorganic and organic geochemical characteristics. Through analysis of major and trace elements, stable isotopic composition, and kerogen type, the study explores the source rock attributes, tectonic setting, weathering/climatic conditions, and organic matter characteristics. The results suggest that the shales originated from felsic/granitic source rock and were deposited in an oxic environment with warm-humid climatic conditions. The organic matter analysis indicates that the shales contain thermally matured mixed Type III/II gas-prone kerogen, predominantly derived from terrestrial sources with significant marine input.
APPLIED GEOCHEMISTRY
(2022)
Article
Geosciences, Multidisciplinary
Jyoti P. Sharma, Prabodha R. Sahoo, E. V. S. S. K. Babu
Summary: Scapolite occurrences in metasedimentary rocks in western India are believed to be formed by hydrothermal ore-bearing fluid interaction with metasediments. The evidence of hydrothermal activity and chlorine sourcing supports this hypothesis.
GEOLOGICAL MAGAZINE
(2023)
Article
Geosciences, Multidisciplinary
E. V. S. S. K. Babu, Sarbajit Dash, G. H. N. V. Santhosh, Abhijeet Mukherjee
Summary: We conducted a study on the major and trace element chemistry of clinopyroxene megacrysts from the Dharwar craton in southern India to understand their origin and the lithospheric conditions. The megacrysts were classified into three groups based on their chemistry, indicating a possible relationship with metasomatism and fractionation processes.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
E. V. S. S. K. Babu, W. L. Griffin, Roger Norris, Elena Belousova, Suzanne Y. O'Reilly, Y. J. Bhaskar Rao
Summary: This study reveals the characteristics of crustal structure and tectonic history of the Paleo-Mesoarchean Western Dharwar Craton (WDC) and Neoarchean Eastern Dharwar Craton (EDC) in India through the analysis of crustal composition and rock samples. The discovery of zircons with ages exceeding 3.6 billion years in the xenocrystic zircons suggests that ancient upper crustal rocks were transported to lower crust and mantle depths, supporting the collisional under thrusting of the WDC beneath the EDC.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Bulusu Sreenivas, T. Vijaya Kumar, E. V. S. S. K. Babu, Y. J. Bhaskar Rao, A. V. Chugaev, V. A. Lebedev, A. B. Vrevsky
Summary: This study presents the ages of a metamorphosed and metasomatized paleosol in Northwestern India, using zircon U-Pb, whole-rock Rb-Sr, and K-Ar dating methods. The results indicate more than two billion years of thermal events and a correlation between Rb-Sr isotope compositions and REE contents during alkali metasomatism.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Ankita Nandi, T. Vijaya Kumar, E. V. S. S. K. Babu, Ravikant Vadlamani
Summary: The southern segment of the Bastar craton is composed of Paleoarchean cratonic fragments intruded by granite batholiths. Two major supracrustal successions, Sukma Group and Bengpal Group, exist within this segment. Detrital zircon U-Pb analysis reveals that the depositional age of the Sukma Group is older than 3.1 Ga, while the Bengpal Group was deposited after 2.4 Ga.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Ch Ashok, E. V. S. S. K. Babu, Sarbajit Dash, G. H. N. Santhosh
Summary: This study presents the petrological and mineralogical characteristics of mafic microgranular enclaves (MMEs) and syn-plutonic dykes (SPDs) from the Sircilla granite pluton in Southern India. The contact relationships between MMEs and the host granite suggest under-cooling and disaggregation of MMEs. Petrographic features and mineral chemistry studies indicate magma mixing/mingling-related processes and suggest an orogenic tectonic setting for magma formation.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2022)
Article
Geosciences, Multidisciplinary
Haifeng Chen, Hao Zou, M. Santosh, Huawen Cao, Franco Pirajno, Changcheng Huang, Mingcai Hou
Summary: Researchers have identified a supervolcano eruption event in the tuff layers from the Early-Middle Triassic boundary in the Yangtze Block. This eruption may have contributed to the delayed biotic recovery after the end-Permian mass extinction.
GEOSCIENCE FRONTIERS
(2024)
Article
Geosciences, Multidisciplinary
Yanjuan Yin, Baohua Zhang, Xinzhuan Guo
Summary: This study determines the Fe-Mn interdiffusion rates in natural Mn-bearing garnet crystals with 750 ppm H2O using an experimental approach. The results show that the Fe-Mn interdiffusion coefficient slightly decreases with increasing Fe content, and water significantly enhances the Fe-Mn interdiffusion in garnet. These findings suggest that the time required for homogenization of the compositional zoning of a garnet is much shorter than previously thought.
GEOSCIENCE FRONTIERS
(2024)
Article
Geosciences, Multidisciplinary
Yirang Jang, Sung Won Kim, Vinod O. Samuel, Sanghoon Kwon, Seung-Ik Park, M. Santosh, Keewook Yi
Summary: Detrital zircon geochronology and Hf isotope analysis are used to infer provenance characteristics and evaluate the tectonic evolution of sedimentary basins. The results of this study show that the Paleozoic sequences of the Okcheon Belt have a diverse provenance linked to different tectonic environments.
GEOSCIENCE FRONTIERS
(2024)
Article
Geosciences, Multidisciplinary
Stephen F. Foley, Isra S. Ezad
Summary: This study investigates the trace element compositions of melts and minerals from hydrous pyroxenites containing K-richterite through high-pressure experiments. The results show that different minerals play different roles in the enrichment of various trace elements. The study also models the isotopic aging process in hydrous pyroxenite source rocks.
GEOSCIENCE FRONTIERS
(2024)
Article
Geosciences, Multidisciplinary
G. Harshitha, C. Manikyamba, M. Santosh, Cheng-Xue Yang, A. Keshav Krishna, V. V. Sesha Sai, I. Panduranga Reddy
Summary: The early Archean oceans underwent significant redox changes that had a lasting impact on the Earth's biosphere. This study investigates the geochemical characteristics of Archean Mnformations in southern India and reveals the importance of these sedimentary deposits in understanding the ancient redox conditions and sedimentation patterns. The findings suggest that the sediments were deposited in shallow to deeper shelf environments in the Archean proto-ocean, and they provide evidence of regional episodes of ocean oxygenation prior to the Great Oxygenation Event.
GEOSCIENCE FRONTIERS
(2024)