Article
Environmental Sciences
B. K. Rana, S. K. Jha, Samim Molla, M. S. Kulkarni
Summary: In this study, the hydrogeochemical processes influencing the groundwater geochemistry, potability, and suitability for agriculture in the Tummalapalle area were evaluated. Analysis of 144 borehole locations revealed that the pH, total dissolved solids, and hardness of the groundwater were within acceptable limits. Piper and Chadha charts were used to determine the dominant hydrogeochemical components of the groundwater, and the Gibbs plot analysis indicated that rock aquifer interaction was the major process governing groundwater geochemistry in this region. The water quality index revealed that 55% of the groundwater samples in the Tummalapalle region were suitable for drinking.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Geosciences, Multidisciplinary
M. Lachhana Dora, Dewashish Upadhyay, Vivek P. Malviya, Tushar Meshram, Srinivas R. Baswani, Kirtikumar Randive, Rajkumar Meshram, G. Suresh, Rashmi Naik, S. Ranjan
Summary: The Bastar Craton in the Indian shield is one of the oldest cratonic nuclei, preserving the record of protracted crustal evolution and metallogeny from Paleoarchean to Mesoproterozoic times. This study reveals the presence of Neoarchean crust formed by collision-accretion processes, as well as younger granites derived by reworking of pre-existing crust. The study also indicates that the tectono-magmatic events in the region were linked to copper and gold mineralization along the craton's western margin.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Anwesa Banerjee, Nicole Sequeira, Abhijit Bhattacharya
Summary: The Greater India Proterozoic Fold Belt (GIPFOB) is a curved tectonized zone in India, consisting of ancient rocks with complex geological histories. Through studying the structures, ages, and geological histories of different blocks, it is found that the southern and central regions exhibit similar characteristics, while the northwestern block shows a different evolutional history compared to other regions.
EARTH-SCIENCE REVIEWS
(2021)
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
Geosciences, Multidisciplinary
Shinjana Sen, Parminder Kaur, Jaspreet Saini, Gurmeet Kaur, Meenal Mishra
Summary: The Mesoproterozoic Kaimur Sandstone from the Vindhyan Supergroup has been extensively used in heritage structures in the Son Valley in Central India for its variegated colors, stratigraphic thickness, hardness, and high strength.
Article
Geosciences, Multidisciplinary
Bat-Orshikh Erdenetsogt, Sung Kyung Hong, Jiyoung Choi, Insung Lee
Summary: This study examined the depositional environments and petroleum source rock potential of Middle Jurassic and Lower Cretaceous lacustrine sedimentary rocks in central Mongolia. The Middle Jurassic shale was found to have a mixed oil and gas potential source rock, while the Lower Cretaceous shales showed a high oil-prone but thermally immature character. The organic geochemical characteristics and depositional environments of these rocks are similar to source rocks in western Chinese basins and eastern Mongolian basins, respectively.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Donald F. Argus, Hilary R. Martens, Adrian A. Borsa, Ellen Knappe, David N. Wiese, Sarfaraz Alam, Mackenzie Anderson, Ashlesha Khatiwada, Nicholas Lau, Athina Peidou, Matthew Swarr, Alissa M. White, Machiel S. Bos, Matthias Ellmer, Felix W. Landerer, W. Payton Gardiner
Summary: In this study, we estimate the changes in subsurface water in California using various data sources. The results show that a portion of precipitation infiltrates the subsurface but is later lost through evapotranspiration and lateral subsurface flow, with the majority of losses occurring in the southern region of the Central Valley. Additionally, the groundwater levels in the Central Valley fluctuate significantly on an annual basis. It is worth noting that a portion of the groundwater lost during recent severe droughts has been replenished during subsequent years of heavy rainfall.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
M. A. Quasim, Nurul Absar, B. P. Singh, Faiz Ahmad, M. Ashok
Summary: In this study, the major, trace, and rare earth element compositions of the Bijaigarh Shale (BS) were analyzed to infer the composition, weathering history, and tectonic setting of the Mesoproterozoic continental crust. The BS consists of quartz, smectite, kaolinite, and illite, with occasional framboidal pyrites. The high chemical index of alteration (CIA) and plagioclase index of alteration (PIA) values, along with the depletion of certain elements, suggest intense chemical weathering in a warm and humid climate. The REE patterns and immobile element ratios indicate a felsic provenance, with insignificant recycling. The source area is estimated to consist of various granite types and Porcellanite.
JOURNAL OF EARTH SYSTEM SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Anju Saxena, Md Merajuddin Khan, Nilasree Raychowdhury, K. J. Singh
Summary: The flora of the Early Permian Talchir Formation is significant as it provides evidence for the emergence of a new flora known as the 'Glossopteris flora'. This study contributes to our understanding of the Talchir flora and reveals a lack of diversity in the Lower Permian sediments of the non-coaliferous Talchir Formation in Singrauli coalfield, Son-Mahanadi valley basin. The recovered plant assemblage is characterized by the presence of mostly leaf forms, such as Cordaitales, Glossopteridales, and Coniferales, along with stem casts/impressions.
JOURNAL OF EARTH SYSTEM SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Sandor Kormos, Reinhard F. Sachsenhofer, Achim Bechtel, Balazs Geza Radovics, Katalin Milota, Felix Schubert
Summary: The Eocene and Lower Oligocene rocks in the Hungarian Palaeogene Basin are identified as potential source rocks for crude oil accumulations. Specifically, the Kosd Formation and Tard Clay Formation are considered high-quality gas and oil-prone source rocks based on Rock-Eval data analysis from borehole samples. The molecular parameters of crude oil samples suggest a shaly source rock deposited in a marine/brackish environment, with organic matter mainly composed of aquatic biomass such as algae, dinoflagellates, and chemoautotrophic bacteria.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
P. Mukhopadhyay, B. K. Prusty, V. Y. Turlapati
Summary: This study investigates the hydrocarbon potential and storage capacity of five shale samples from the Barren Measure Formation in the Damodar Valley, India. Results show that these shales have excellent TOC content and pore spaces, making them suitable as source rocks and reservoir rocks for oil and gas.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Gurmeet Kaur, Swtantra Kumar Singh, Prabhakar Upadhyay, Parminder Kaur, Jaspreet Saini, Alok Kumar Pandey, Meenal Mishra
Summary: The Eastern Son valley of India is a geographically unique region with rich geological resources and diverse natural landscapes, as well as significant cultural and historical heritage.
Article
Multidisciplinary Sciences
Qamar Yasin, Syrine Baklouti, Ghulam Mohyuddin Sohail, Muhammad Asif, Gong Xufei
Summary: This study evaluates the potential of source rocks in the Infracambrian rock sequence in southeastern Pakistan through various methods. The results indicate a high petroleum potential in the Infracambrian rocks in this area.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Wen-Xiao Ning, Jin-Bo Zan, Sheng-Li Yang, Xiao-Min Fang, Miao-Miao Shen, Jian Kang, Yuan-Long Luo, Shu-Wen Wang
Summary: Characterizing the spatial distribution of precipitation across the Tibetan Plateau is crucial for understanding the impact of topography and atmospheric circulation on climatic patterns. The study found a correlation between pedogenic intensity and precipitation, with potential for using magnetic properties of surface soils to determine precipitation distribution. Combining magnetic data with meteorological information helps define the climatic boundary in the region.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Review
Geosciences, Multidisciplinary
Arvind K. Singh, Partha Pratim Chakraborty
Summary: The Vindhyan Supergroup is the largest Proterozoic sedimentary basin fill in the Indian shield and holds crucial information for understanding sedimentation dynamics in Proterozoic clastic shelves.
GEOLOGICAL MAGAZINE
(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
Environmental Sciences
Priyankar Chand, Suryendu Dutta, Suparna Mukherji
Summary: Percolation of water through oily sludge during storage and handling can lead to soil and groundwater contamination. In this study, the water-soluble fraction (WSF) of oily sludge, obtained by equilibrating the sludge with water, was analyzed. The WSF contained dissolved organic carbon (DOC) as well as various organic compounds such as quinolines, naphthalenes, and phenol derivatives. A consortium of three bacterial strains was found capable of degrading the WSF, with Bacillus cereus showing the highest degradation rate for certain substances. Biodegradation of WSF led to the removal of n-alkanes within 2 days.
ENVIRONMENTAL POLLUTION
(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
Environmental Sciences
Sanjeeb Mohapatra, Daniel Snow, Patrick Shea, Andy Galvez-Rodriguez, Manish Kumar, Lokesh P. Padhye, Suparna Mukherji
Summary: The photochemical transformation of pharmaceuticals is significant in wastewater treatment plants and surface waters. This study investigated the photodegradation of five pharmaceuticals in samples from a wastewater treatment plant and surface water sources. The results show that the presence of organic matter and reactive radicals play a crucial role in the photodegradation process.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Zhijie Wang, Jianguo Bao, Haozhou He, Suparna Mukherji, Liting Luo, Jiangkun Du
Summary: This study developed a novel and cost-effective method to anchor atomic iron catalysts in Enteromorpha-derived carbon matrices, and the catalyst exhibited high activity in peroxydisulfate (PDS) conversion for organic pollutant oxidation. The mechanism of the catalyst was investigated through experiments and theoretical calculations, and its performance in realistic wastewater remediation scenarios was also demonstrated.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Reeti Kumar, Liya George, Zhao Jun, Suparna Mukherji
Summary: Heterogeneous photocatalysis using graphene oxide-TiO2 nanocomposite (GOT) was effective in removing dichlorvos and malathion pesticides from water. Optimum results were achieved at pH 6 and a catalyst dose of 60 mg/L, with high degradation rates and mineralization levels observed under UV irradiation.
Article
Energy & Fuels
Ankisha Vijay, Prakash C. Ghosh, Suparna Mukherji
Summary: This study developed a dual-chambered microbial fuel cell (MFC) for the treatment of saline wastewater. The use of halophilic exo-electrogenic bacteria in the anodic chamber and denitrifying bacteria in the cathodic chamber significantly improved the power generation and removal of organics and nitrate. Electrochemical analysis showed enhanced activity and lower resistance with increased salinity. Microbial community analysis identified Clostridium, Shewanella, and Bacillus as the predominant genera in the anodic chamber. Overall, this study demonstrated the dual applicability of the MFC system for organics and nitrate removal from saline and contaminated wastewater while generating power.
Article
Green & Sustainable Science & Technology
Neha Garg, Anurag Garg, Suparna Mukherji
Summary: In this study, the removal of the recalcitrant azo dye reactive yellow 145 (RY145) was achieved through sequential treatment using zero valent aluminum (ZVAl) and bacterial degradation. The ZVAl pretreatment resulted in significant decolorization, followed by microbial degradation of the intermediates. The combined treatment exhibited high efficiency in dye decolorization and organic compound degradation, addressing the challenges posed by RY145.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Priyankar Chand, Suryendu Dutta, Suparna Mukherji
Summary: This study optimized the slurry phase biodegradation of oily sludge from an Indian refinery by a bacterial consortium in the presence of Triton X-100. GCxGC analysis showed an increase in lower n-alkanes and removal of higher n-alkanes after biodegradation. Changes in the pyrolysis products of asphaltenes were observed, indicating the biotic transformation of asphaltene fraction.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(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)
Review
Geosciences, Multidisciplinary
Fuquan Yang, Xinxia Geng, Zhixin Zhang, Guoren Liu, Hanqing Zhang
Summary: Northern Xinjiang in China is an important part of the Central Asian Orogenic Belt, characterized by multiple episodes and types of mineralization. Cu and Au deposits are mostly found in Altay, Junggar, and Tianshan, with minor occurrences in Beishan. The most common types of Cu-Au deposits are volcanogenic and porphyry deposits. The formation of Cu-Au deposits can be divided into five mineralization episodes, with the Devonian and Carboniferous being the main periods. These deposits developed in various tectonic settings, including island arc, continental arc, collision, and postcollisional extensional tectonics.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Jiang Zhu, Dan-yang Liu, Chao Chen, Song Chen, Yuan-bing Zou, Leonid Danyushevsky, Jing-meng Huang, Xiang-wei Tang
Summary: Numerous lode gold and silver deposits have been discovered in orogenic belts in China. This study focuses on the formation and fluid evolutions of the super-large Yingdongpo gold and giant Poshan silver deposits in the Tongbai-Dabie orogen. The results suggest that both deposits were formed concurrently with Early Cretaceous granitic magmatism and the ore-forming fluids were primarily of magmatic origin with meteoric water inputting. The gold mineralization is related to a change in the physicochemical properties of the fluids, while the silver mineralization is favored by progressive deposition of sulfides in a slowly cooling hydrothermal system.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Arun Bhadran, B. P. Duarah, Drishya Girishbai, Mohammad Atif Raza, Avi Mero, Sandeep Lahon, A. L. Achu, Girish Gopinath
Summary: The Brahmaputra foreland basin, known for its dynamic tectonism and sediment load, exhibits a variety of seismically generated soft sediment deformation structures (SSDS) such as clastic dikes, sand sills, and micro-faults. These structures, influenced by multiple strong seismic events, are characterized by their dimensions, intrusion angles, cross-cutting relations, wall shattering, and age. The study suggests that a significant earthquake with high intensity and magnitude might have caused liquefaction features in the area. The findings highlight the importance of studying SSDS in tectonically active regions with limited surface ruptures and dense alluvial cover.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Huan Wang, Lirong Dou, Xingyang Zhang, Jiquan Yin, Beiwei Luo, Haigang Duan, Peiguang Yang, Yifan Song
Summary: Quantitative analysis of sediment composition and microfacies helped identify changes in facies belts in the Cretaceous Mishrif Formation. The study demonstrated the importance of carbonate microfacies quantification and its implications for paleogeographic research.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Boran Wang, Zhilong Huang, Dongsheng Xiao, Haiyue Yu, Wenren Zeng, Xin Wang, Tong Qu, Zhiyuan Li, Yizhuo Yang
Summary: By systematically analyzing the source rocks of the Sangonghe Formation in the Taibei Sag, NW China, and using kerogen kinetics modeling, this study reveals the influence of geological conditions on hydrocarbon generation and expulsion. The source rocks in different environments show distinct geochemical characteristics and hydrocarbon generation potential.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Haiying Yang, Zhifang Zhao, Haifeng Fan, Min Zeng, Jiafei Xiao, Xiqiang Liu, Shengwei Wu, Jiangqin Chao, Yong Xia
Summary: This paper investigates the REE enrichment and the role of Fe/Mn (oxyhydr)oxides in marine phosphorites from the early Cambrian period in South China. The study reveals that Fe/Mn (oxyhydr)oxides play a crucial role in REE enrichment and are controlled by Fe-redox pumping.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Qing Li, Hongbin Wang, Feng Cai, Di Luo, Fanxing Kong, Ang Li, Xiting Liu
Summary: The elemental and isotopic compositions and abundance of carbonates in marine sediments are used to reconstruct ancient climate and ocean conditions. This study analyzed sediment samples from the Okinawa Trough to examine the relationship between carbonates' compositions and methane seepage and sea-level changes. The results indicate that both biogenic and authigenic carbonates are important factors in understanding paleoclimate and paleoceanography.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Maryam Akbarzadeh Aghdam, Abdolreza Ghods, Farhad Sobouti, Khalil Motaghi, Keith Priestley, Mohammad Enayat
Summary: The Makran subduction zone is difficult to monitor due to limited seismic activity, but a temporary seismic network was installed to investigate the relationship between different regions and detect seismicity. The observed seismicity suggests the presence of structural boundaries and seismically inactive areas.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Zhen-Yu Wang, Hong-Rui Fan, Hai-Dong She, Kui-Feng Yang
Summary: This study conducted detailed geochemical, geochronological and isotopic analyses on the Songxian syenite in the Qinling Orogen. The results revealed the magma sources, petrogenesis and geodynamic implications of this alkaline intrusion. The study suggests that the syenite was formed through multiple stages of magmatism, involving the partial melting of the enriched lithospheric mantle and mixing with melts derived from the lower crust.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Yu Li, Wen-Liang Xu, Xiao-Ming Zhang, Jie Tang
Summary: This study presents new zircon U-Pb-Hf and whole-rock geochemical data for Jurassic intrusive rocks in the Yanbian area of NE China, providing insights into the subduction history of the Paleo-Pacific Plate. The study reveals three stages of Jurassic magmatism in the area, indicating the presence of an active continental margin related to the initial subduction of the Paleo-Pacific Plate beneath the Eurasian continent.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Lina Ai, Shengfa Liu, Shuai Cong, Hui Zhang, Peng Cao, Kaikai Wu, Wenxing Ye, Che Abd Rahim Mohamed, Xuefa Shi
Summary: This study investigates the depositional configurations and sedimentary environments of the Malacca Strait through analyzing grain size characteristics and hydrographic data. The results show that residual sediments are concentrated in the central region, while modern terrigenous sediments are distributed along the coast of Malaysia and the northern region. The sedimentary environments are influenced by seasonal variations and hydrodynamic conditions.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Liang Xiao, Jia-qi Liang, Li-yan Guo, De-shuang Ji, Man Yuan, Xiang-chuan Li, Nan Sun, Zuo-chen Li
Summary: This study investigates the correlation between stable carbon isotopes of plant fossils and CO2 levels in the Jurassic period. The results suggest a weak correlation between the two, indicating caution is needed when using stable carbon isotopes to reconstruct high paleo-CO2 concentrations.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Xuli Yang, Feng Huang, Jifeng Xu, Xijun Liu, Liying Zhang, Zhao Zhang, Benyan Xu, Man Zhang, Yunchuan Zeng, Qian Liu, Mingda Lv
Summary: The extensively developed Early Cretaceous intermediate-felsic rocks in the northern North China Craton provide valuable insights into the nature of Paleo-Pacific subduction and associated geodynamic processes. Geochemical and geochronological analyses of trachyandesites and rhyolites from the eastern Hebei, northern NCC suggest that the trachyandesites likely originated from enriched mafic lower crust and the rhyolites are derived from the trachyandesitic magmas through fractional crystallization. The migration direction change of these rocks is believed to be primarily attributed to slab rollback of the subducting Paleo-Pacific Plate.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Wei Liu, Ping Gao, Xianming Xiao, Yanming Zhao, Yijie Xing, Jinku Li
Summary: The organic-rich shales of the Shuijingtuo Formation in China are an important target for shale gas exploration. The upper section of the formation, primarily consisting of limestone, silty shale, and black shale, has been rarely studied but recently showed promising results for shale gas exploration. Geochemical investigations of the upper section shale deposits revealed that the organic matter enrichment mechanism underwent dynamic changes due to relative sea-level changes and episodic upwelling activities.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Xin Wang, Chen Zhang, Zixin Xue, Qianyou Wang, Zhenxue Jiang, Kun Zhang, Xiangye Kong
Summary: This study analyzed the heterogeneity of gas compositions and the effects of magmatism on gas accumulation in shale gas exploration in the Yangtze plate. The results showed that magmatism caused the development of micro-fractures in shale reservoirs and accelerated the thermal evolution rate of organic matter. The impact of magmatism on shale gas accumulation varied in different regions, either favoring or compromising efficient gas accumulation in shale reservoirs.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)