Article
Geochemistry & Geophysics
Mike W. Jansen, Jonas Tusch, Carsten Muenker, Alessandro Bragagni, Riccardo Avanzinelli, Filippo Mastroianni, Finlay M. Stuart, Florian Kurzweil
Summary: Several studies have found small heterogeneities in the relative abundance of 182W, the radiogenic nuclide of short-lived 182Hf, in terrestrial rocks. The origin of this anomaly is still unclear, with proposed models focusing on core-mantle interaction or the presence of isolated reservoirs in the lower mantle. By comparing intraplate basalts in different regions, researchers discovered that there is generally a lack of 182W anomalies in European mantle-related basalts.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Ronghua Cai, Jingao Liu, D. Graham Pearson, Dongxu Li, Yong Xu, Sheng-Ao Liu, Zhuyin Chu, Li-Hui Chen, Shuguang Li
Summary: The widespread Cenozoic intraplate basalts in eastern China offer the opportunity to examine the consequences of interaction between the stagnant Pacific slab and overlying asthenosphere. Different types of basalts show variations in PGE patterns and isotopic compositions, suggesting different sources and processes of material exchange.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Song-Yue Yu, Yi-Gang Xu, Kang-Jun Huang, Jiang-Bo Lan, Lie-Meng Chen, Sheng-Hua Zhou
Summary: Through integrated Mg-Sr-Nd isotope study of Jiaohe garnet pyroxenite xenoliths and Cenozoic basalts from the Changbaishan-baoqing volcanic belt (CVB), NE China, it was found that the intraplate basalts in eastern Asia are derived from both subducted oceanic crust and metasomatized lithospheric mantle, with different isotopic compositions playing a key role in their generation.
Article
Geosciences, Multidisciplinary
Juan Wang, Yongsheng Liu, Yanfei Zhang, Chao Wang, Xiangfa Wang
Summary: This study explores the promotion of carbon migration at forearc depths by hydrous fluids; the experiments demonstrate that aqueous fluids can significantly facilitate sedimentary carbon migration, and approximately 50% of subducting sedimentary carbon may be released at forearc depths; the forearc mantle may serve as an important carbon reservoir.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Ritabrata Dasgupta, Joyjeet Sen, Nibir Mandal
Summary: This study uses scaled laboratory experiments and numerical simulations to quantitatively analyze the bending radius of subducting slabs in the upper mantle, taking into account the effects of slab age. The experiments and simulations show consistent results and propose theoretical models relating slab bending to age, validated by observational data from natural subduction zones.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geology
Muchen Sun, Youqiang Yu, Stephen S. Gao, Kelly H. Liu
Summary: A study has found a significant thinning of the mantle transition zone extending from central Honshu, Japan, to the Korean Peninsula, supporting the existence of a slab tear. The results also suggest that hot mantle material may flow through the tear and contribute to surface volcanism.
Article
Geochemistry & Geophysics
Jonathan C. Aitchison, Dominique Cluzel, Trevor R. Ireland, Renjie Zhou, Dongyang Lian, Daniel Patias, Zhen Yan, Jingsui Yang
Summary: This study demonstrates the association of zircons and rutiles recovered from ophiolitic rocks in New Caledonia with subducting sediments, indicating the transfer of solid-phase materials between plates. The presence of these minerals in forearc harzburgite suggests their incorporation into the mantle wedge host likely occurred at around 50-60 km depth within the subduction channel. The conveyance of high field strength elements within solid-state accessory mineral phases into suprasubduction mantle wedges represents a significant phenomenon at convergent margins globally.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Xuran Liang, Dapeng Zhao, Yi-Gang Xu, Yuanyuan Hua
Summary: This study presents high-resolution 3-D tomographic images of P-wave isotropic velocity, radial anisotropy, and azimuthal anisotropy beneath NE Asia. The results reveal negative radial anisotropy in the asthenosphere of the big mantle wedge and distinct P-wave velocity variations across the Tanlu fault zone. The combination of tomographic results and surface geological features suggests that convection in the mantle includes upwelling asthenosphere beneath the Japan Sea and the Korean Peninsula, as well as downwelling asthenosphere beneath the Songliao and North China basins. The Tanlu fault zone plays a significant role in the structure and dynamics of the big mantle wedge.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Xiyuan Bao, Carolina R. Lithgow-Bertelloni, Matthew G. Jackson, Barbara Romanowicz
Summary: Research suggests that volcanic hotspots vary greatly in temperature, with some being extremely hot, some cold, and others not hot enough to actively upwell. Cold hotspots may originate from the upper mantle depth or be cooled by small-scale convection.
Article
Geosciences, Multidisciplinary
Samuel Angiboust, Jesus Munoz-Montecinos, Aitor Cambeses, Tom Raimondo, Damien Deldicque, Antonio Garcia-Casco
Summary: Recent seismological studies have found transient seismicity clusters in the mantle wedge above subduction zones, but their physical significance remains poorly understood. This study documents brittle-viscous features in jadeitites from Russia, Myanmar, and Guatemala, providing insights into deformation mechanisms in deep subduction environments. The observed deformation patterns in these jadeitites suggest external fluid influx within fracture zones, contributing to seismic instabilities in the mantle wedge.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Dapeng Zhao, Genti Toyokuni, Kenkichi Kurata
Summary: The study suggests that there are widespread low-Vp anomalies in the whole mantle beneath the Southeast Asian basalt province, possibly indicating the presence of a cluster of mantle plumes. The Hainan plume may be the strongest, but it is slowing down, and other mantle plumes beneath Cenozoic volcanoes in the region may be dying or already dead.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Multidisciplinary Sciences
Abhishek Prakash, Caleb W. Holyoke III, Peter B. Kelemen, Stephen H. Kirby, Andreas K. Kronenberg, William M. Lamb
Summary: This study evaluates a model for intermediate-depth earthquakes in subduction zones based on shear localization, shear heating, and runaway creep within thin carbonate layers. The model suggests that thermal shear instabilities in carbonate lenses can contribute to intermediate-depth seismicity. Alteration of peridotites in subducting plates and the overlying mantle wedge by CO2-bearing fluids may lead to the formation of carbonate minerals. The model predicts conditions of stable and unstable shear, with strain rates comparable to seismic velocities, and provides an alternative to dehydration embrittlement as a mechanism for intermediate-depth earthquakes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Geosciences, Multidisciplinary
Yuan Liu, Mei Xue, Zhen Guo, Ailan Zhu
Summary: Anisotropy within subducted slabs provides important information about their deformation history. In this study, we analyze seismic data recorded by ocean bottom seismometers to measure the anisotropy within the subducting northern Philippine Sea plate. The results suggest that the anisotropy is likely formed during the seafloor spreading period and strengthened by trench-parallel faults associated with plate bending.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Review
Geosciences, Multidisciplinary
Rixiang Zhu, Weidong Sun
Summary: The Circum-Pacific subduction zone is a renowned gold metallogenic domain in the world, with important gold metallogenic provinces such as the North China Craton and Nevada. Formation of ore-forming fluids is related to the destruction of cratons and involves hydrated hydrous minerals like Phases A to E releasing sulfur-rich fluids. The destabilization of a water- and gold-rich weak layer during craton destruction accelerates the release of gold-bearing fluids for explosive gold mineralization.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Junichi Nakajima, Akira Hasegawa
Summary: Repeating earthquakes are interpreted as repeated ruptures of an isolated asperity patch surrounded by a stable sliding regime, and they have been observed in various tectonic settings. We investigated the occurrence of repeaters in the continental crust and subducting slabs beneath the Japanese Islands and found a prevalence of repeaters in both locations. The repeaters show similar seismicity rates and occur on well-defined fault planes coincidentally with non-repeating earthquakes, suggesting a common generation process independent of the tectonic regime.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Review
Multidisciplinary Sciences
Eiji Ohtani
NATIONAL SCIENCE REVIEW
(2020)
Article
Geosciences, Multidisciplinary
Wen-Pin Hsieh, Takayuki Ishii, Keng-Hsien Chao, Jun Tsuchiya, Frederic Deschamps, Eiji Ohtani
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Geochemistry & Geophysics
Egor Koemets, Liang Yuan, Elena Bykova, Konstantin Glazyrin, Eiji Ohtani, Leonid Dubrovinsky
Article
Geosciences, Multidisciplinary
Enrico Marzotto, Wen-Pin Hsieh, Takayuki Ishii, Keng-Hsien Chao, Gregor J. Golabek, Marcel Thielmann, Eiji Ohtani
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Geosciences, Multidisciplinary
Takayuki Ishii, Eiji Ohtani
Summary: Research suggests that even under wet subducting slab conditions, olivine and wadsleyite exhibit dry transformation kinetics, which could contribute to deep-focus earthquakes and large slab deformation.
Article
Multidisciplinary Sciences
Sujoy Ghosh, Kishan Tiwari, Masaaki Miyahara, Arno Rohrbach, Christian Vollmer, Vincenzo Stagno, Eiji Ohtani, Dwijesh Ray
Summary: This study reports the first natural occurrence of Fe-bearing aluminous bridgmanite in the Katol L6 chondrite, with a composition closely matching those synthesized in high-pressure experiments. The mineral coexists with majorite and metal-sulfide intergrowths, and has a significantly higher Fe3+/Sigma Fe ratio compared to coexisting majorite, in agreement with experimental studies. Textural observations and comparisons with laboratory experiments suggest that the Katol bridgmanite formed directly from chondritic melt generated by a shock event at pressures of around 23 to 25 gigapascals.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geosciences, Multidisciplinary
Eiji Ohtani, Toru Sakurabayashi, Kosuke Kurosawa
Summary: Neumann band in iron meteorites is a characteristic texture formed by ancient collisions on parent bodies. Through experiments and numerical simulations, we revealed the effects of pressure and temperature on the formation and disappearance of Neumann bands. The results showed that the bands are formed within a specific pressure range and can disappear after annealing at certain temperatures.
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2022)
Article
Geography, Physical
Eiji Ohtani
Summary: Various phase transitions occur in the Earth's interior, causing discontinuities in seismic velocity and density profiles. Major transitions in the lower mantle include spin transition in mantle minerals with iron and post-perovskite transition of bridgmanite. Seismic velocity anomalies are associated with hot mantle plumes and cold slab subduction.
JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI
(2022)
Article
Geosciences, Multidisciplinary
Lu Liu, Hongsheng Yuan, Yao Yao, Ziqiang Yang, Federico Aiace Gorelli, Nico Giordano, Lixin He, Eiji Ohtani, Li Zhang
Summary: This study reports the formation of an Al-rich Nt-phase in model hydrated basalts, suggesting its potential role as a water carrier in subducted oceanic crust to the deep lower mantle.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
S. Dominijanni, C. A. McCammon, E. Ohtani, D. Ikuta, T. Sakamaki, T. Ishii, G. Criniti, L. S. Dubrovinsky, S. Khandarkhaeva, T. Fedotenko, K. Glazyrin, H. Uchiyama, H. Fukui, A. Q. R. Baron
Summary: The elastic properties of B2-Fe0.67Ni0.06Si0.27 alloy were investigated under high pressure using inelastic X-ray scattering and powder X-ray diffraction. The results were compared with the preliminary reference Earth model, and showed consistency in wave velocities and densities.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Wen-Pin Hsieh, Enrico Marzotto, Takayuki Ishii, Leonid Dubrovinsky, Alena A. Aslandukova, Giacomo Criniti, Yi-Chi Tsao, Chun-Hung Lin, Jun Tsuchiya, Eiji Ohtani
Summary: The deep water cycle of the Earth has a significant impact on its physical and chemical properties, as well as its geodynamics. This study focuses on the influence of dense hydrous magnesium silicates (DHMSs) on the thermal evolution and dynamics of sinking slabs. The research shows that the thermal conductivity of DHMSs is lower than that of other components along slab subduction, which contributes to the formation of a cold hydrous layer within sinking slabs, stabilizes hydrous minerals, and promotes water transportation to the deeper mantle.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Multidisciplinary Sciences
Takayuki Ishii, Giacomo Criniti, Eiji Ohtani, Narangoo Purevjav, Hongzhan Fei, Tomoo Katsura, Ho-kwang Mao
Summary: Water transported by subducted oceanic plates affects the dynamics and evolution of the Earth's interior. The study suggests that water in the lower mantle may be stored in basaltic fragments of subducted slabs. High-temperature aluminous silica minerals in the lower mantle can store significant amounts of water, allowing water circulation between the upper mantle and lower mantle.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Daijo Ikuta, Eiji Ohtani, Hiroshi Fukui, Takeshi Sakai, Daisuke Ishikawa, Alfred Q. R. Baron
Summary: In this study, the compressional and shear wave velocities of hexagonal close-packed iron were determined at high pressures, providing insights into the composition and evolution of Earth's inner core. The results suggest that the inner core of the Earth is slower in terms of wave velocities compared to pure iron, with the addition of silicon and sulfur to the iron-nickel alloy explaining the observed density and sound velocity. These findings contribute to a better understanding of the Earth's core composition.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Maki Hamada, Seiji Kamada, Eiji Ohtani, Tatsuya Sakamaki, Takaya Mitsui, Ryo Masuda, Naohisa Hirao, Yasuo Ohishi, Masahide Akasaka
Summary: The study investigated the structural transition and spin crossover of Fe2+ in synthetic (Mg0.6Fe0.4)O-ferropericlase up to pressures of the lower mantle using synchrotron x-ray diffraction and Mossbauer spectroscopy. The results showed the existence of high-spin and low-spin Fe2+ at pressures ranging from 61 to 136 GPa, with a gradual increase in the ratio of low-spin Fe2+ to high-spin Fe2+ as pressure increases. Above 136 GPa, all Fe2+ was found to be in a low-spin state.
Article
Physics, Multidisciplinary
N. Hirao, S. Kawaguchi, K. Hirose, K. Shimizu, E. Ohtani, Y. Ohishi
MATTER AND RADIATION AT EXTREMES
(2020)
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)