Article
Geochemistry & Geophysics
Xianyi Li, Xinru Zheng, Xiangming Dai, Rafael Almeida, Chuang Sun
Summary: In this study, the three-dimensional structural evolution of the Xiongpo fault-fold belt in the piedmont of the Longmen Shan in eastern Tibet is explored. The results show that there is a variation in the subsurface structural architecture along the strike of the belt, leading to different topographic relief orientations.
Article
Geosciences, Multidisciplinary
Zhenyun Wu, Hongwei Yin, Changsheng Li, Xiulei Yang, Li Wang, Fuyuan Wang, Shaochun Dong, Dong Jia
Summary: The study demonstrated the influence of regional erosion and sedimentary loading on fault formation and evolution in the Longmen Shan active fold-thrust belt using four groups of discrete element models (DEMs). The results indicated that synkinematic erosion and sedimentation play crucial roles in reactivating pre-existing faults and delaying the development of new faults. Furthermore, differential erosion and sedimentary loading were identified as key factors for the differential evolution of the fold-thrust belt, with the central and southern regions being more conducive to earthquakes due to the blocking effect of synkinematic sedimentation on stress propagation.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Chuang Sun, Zhigang Li, Shimin Wu, Zhiyuan He, Shaotian Zhao, Panfei Wang
Summary: The study focuses on the WSFTB located outboard of the eastern Tibetan Plateau. Results from sandbox experiments show that the presence of a mid-level decollement can significantly affect regional structural configuration, including accelerating deformation propagation rate and altering deformation front position.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Wei Wang, Vincent Godard, Jing Liu-Zeng, Jinyu Zhang, Zhigang Li, Sheng Xu, Wenqian Yao, Zhaode Yuan, Georges Aumaitre, Didier L. Bourles, Karim Keddadouche
Summary: The research on denudation rates in the southern Longmen Shan suggests spatial variations and a potentially close-to-exhumational-steady-state condition. High rates of exhumation and denudation are predominantly localized in the hanging walls of major thrust faults in this region.
Article
Geosciences, Multidisciplinary
Tuo Shen, Xiwei Xu, Yujiang Li, Luyuan Huang, E. A. Rogozhin, Qixin Wang, Wenjun Kang, Xiaoqiong Lei
Summary: The study examined the vertical and horizontal differences in the uplift process of the Longmen Shan orogenic belt. Using the finite element method, the uplift process was reconstructed and the mechanical properties of the lithosphere in the northern and southern parts were found to be different, partially explaining the observed geological phenomena in the region.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geography, Physical
Ling Zhang, Xiaoping Yang, Weiliang Huang, Haibo Yang, Shengqiang Li
Summary: The study reveals that the lateral propagation rate of active folds on the Qiulitage anticline increases gradually away from its central peak. Additionally, the eastern segment of the Qiulitage anticline initially developed from the linkage of two smaller folds and subsequently propagated eastward.
Article
Geosciences, Multidisciplinary
Zibo Wang, Ruifeng Liu, Wei Liu
Summary: After the 2008 Wenchuan earthquake, the Longmen-Shan fault zone has experienced frequent seismic activity. This study used seismic data to estimate the source parameters of moderate magnitude events in the Longmen-Shan Fault zone. The results suggest that the earthquakes in this region have high energy release and potential for strong ground shaking.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Panpan Zhao, Michel Campillo, Jiuhui Chen, Qiyuan Liu, Shuncheng Li, Yu Li
Summary: In this study, a 3-D crustal S-wave velocity structure beneath the Longmen Shan fault zone and its adjacent regions was presented using seismic ambient noise imaging techniques. The imaging revealed the different structural characteristics of the fault zone from south to north and supported the hypothesis of crustal channel flow in the growth of eastern Tibet.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Kexin Yi, Feng Cheng, Yizhou Yang, Zhaojie Guo
Summary: This study reveals the provenance changes in the southern Qilian Shan during the Pleistocene, supporting the argument of northward propagation of the southern Qilian Shan. It also suggests a complex growth pattern of the Qilian Shan in the northeastern Tibetan Plateau.
Article
Geochemistry & Geophysics
Xun Zeng, Xibin Tan
Summary: In this study, we analyze the stability of drainage divides along the Beichuan-Yingxiu Fault, a dextral strike-slip fault with a reverse component. We find that active strike-slip faults can cause instability in drainage divides and identify potential river capture events. This study reveals the response of drainage divides to strike-slip faulting and suggests their potential use in identifying fault activity and slip sense.
Article
Geography, Physical
Bernard Delcaillau, Fabien Graveleau, Dimitri Saint Carlier, Gang Rao, Maryline Le Beon, Julien Charreau, Maelle Nexer
Summary: This study conducted a detailed analysis of the Qiulitage fold belt in the Kuqa foreland based on open-access DEMs and field work. The results indicate that the fold belt consists of six morphological units and has undergone interactions during vertical growth and lateral propagation of the folds. The structural evolution of the fold belt has significantly influenced the development of major rivers and minor rivers.
Article
Geochemistry & Geophysics
Maomao Wang, Ming Wang, Wang Feng, Bing Yan, Dong Jia
Summary: In this study, we investigated the interactions between structural deformation and surface processes in the Longmen Shan fold-and-thrust belt and the western Sichuan foreland basin. We used the discrete-element modeling (DEM) method to study the influences of mechanical properties and erosion/deposition on structural evolution. The DEM simulations revealed two stages of surface processes during the Late Cenozoic, which significantly affected thrusting sequences and strain localization. These findings have important implications for understanding the seismic potentials of other fold-and-thrust belts that interact with dynamic surface processes.
Article
Geochemistry & Geophysics
Chenglong Ge, Philippe Herve Leloup, Yong Zheng, Stephane Scaillet, Laura Airaghi, Florian Duval, Jinjiang Zhang, Haibing Li
Summary: The Longmen Shan in the eastern Tibetan plateau is often used as an example of an orogenic system built by crustal channel flow extrusion. However, our study supports a different mechanism, the crustal accretionary prism model, based on the kinematics of the Wenchuan-Maoxian fault zone. Our results show that the fault zone experienced a series of deformation phases, including right-lateral/normal, reverse, and right-lateral/reverse since the Oligocene. These findings contradict the predictions of lower crustal channel-flow extrusion models.
Article
Geochemistry & Geophysics
Yu Wang, Yunung Nina Lin, Yoko Ota, Ling-Ho Chung, J. Bruce H. Shyu, Hong-Wei Chiang, Yue-Gau Chen, Ho-Han Hsu, Chuan-Chou Shen
Summary: This study examines the roles of diapiric folding versus fault-related folding in mud-cored anticlines by analyzing the structural developments in southwestern Taiwan. The findings suggest that a hybrid fault tip fold-fault propagation fold model can best explain the observed geological features. Mud diapirism is considered a secondary process that enhances fold amplification in certain areas.
Article
Geography, Physical
Yijia Ye, Xibin Tan, Yiduo Liu, Chao Zhou, Feng Shi, Yuan-Hsi Lee, Michael A. Murphy
Summary: The Dayi subsegment in the southern Longmen Shan thrust belt remained unruptured in previous earthquakes, possibly due to localized weak materials or differential erosion. Research suggests that the area has lower erosion rates and exhibits distinct topographic features.
Article
Geochemistry & Geophysics
Wei Wang, Vincent Godard, Jing Liu-Zeng, Jinyu Zhang, Zhigang Li, Sheng Xu, Wenqian Yao, Zhaode Yuan, Georges Aumaitre, Didier L. Bourles, Karim Keddadouche
Summary: The research on denudation rates in the southern Longmen Shan suggests spatial variations and a potentially close-to-exhumational-steady-state condition. High rates of exhumation and denudation are predominantly localized in the hanging walls of major thrust faults in this region.
Article
Geosciences, Multidisciplinary
Eric O. Lindsey, Rishav Mallick, Judith A. Hubbard, Kyle E. Bradley, Rafael V. Almeida, James D. P. Moore, Roland Burgmann, Emma M. Hill
Summary: The study introduces a new method to infer the slip rate deficit of offshore megathrusts, providing better understanding of seismic slip behavior. It reveals that the shallow fault generally has a slip rate deficit between 80% and 100% of the plate convergence rate when locked patches are present. This finding suggests a potentially higher global tsunami hazard than currently recognized.
Article
Geosciences, Multidisciplinary
Chuang Sun, Zhigang Li, Shimin Wu, Zhiyuan He, Shaotian Zhao, Panfei Wang
Summary: The study focuses on the WSFTB located outboard of the eastern Tibetan Plateau. Results from sandbox experiments show that the presence of a mid-level decollement can significantly affect regional structural configuration, including accelerating deformation propagation rate and altering deformation front position.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Xue Yang, Chuanyong Wu, Zhigang Li, Weitao Wang, Gan Chen, Lei Duan
Summary: This study reveals a relatively high late Quaternary shortening rate of the Huoyanshan structure in the Eastern Chinese Tian Shan, indicating it as an active area in the region. The ongoing India and Eurasia collision has affected the entire Tian Shan, with strain occurring in both the interior and range-front foreland.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geography, Physical
Qingying Tian, Eric Kirby, Wenjun Zheng, Huiping Zhang, Hao Liang, Zhigang Li, Weitao Wang, Tao Li, Yipeng Zhang, Binbin Xu, Peizhen Zhang
Summary: This study evaluates the erosion rates during the late Quaternary along the northern Qilian Shan, indicating that the landscape evolution in the monsoon region has undergone glacial-interglacial cycles over the past 200,000 years. Paleoerosion rates within the Hongshuiba watershed appear to have fluctuated between around 200 m/Myr during glacial episodes to 500-700 m/Myr during interglacial times, similar to recent erosion rates inferred from Be-10 in modern sediment.
Article
Geochemistry & Geophysics
Boxuan Zhang, Wenjun Zheng, Tao Li, Weitao Wang, Jie Chen, Zhigang Li, Xinnan Li, Lei Duan
Summary: Studying the compression deformation characteristics of the southern Qilian Shan front, it was found that the Santai anticline is a fault-propagation fold controlled by basement faulting, with a short-term deformation trend of southward migration.
Article
Geosciences, Multidisciplinary
Jing Hu, Dong Jia, Guoqi Wei, Wuren Xie, Yiquan Li, Nan Su, Zhuxin Chen, Wei Yang, Zhigang Li, Chuang Sun, Yong Zhang
Summary: This study analyzes the structure and evolution of an underlying Neoproterozoic rift basin in the Sichuan Basin, based on seismic reflection data and magnetotelluric data. The preliminary hydrocarbon conditions in the rift basin are characterized, and the study provides important insights for deep hydrocarbon exploration in China and worldwide research on Neoproterozoic rift basins.
Article
Geochemistry & Geophysics
Chuang Sun, Zhigang Li, Andrew Zuza, Wenjun Zheng, Dong Jia, Zhiyuan He, Gege Hui, Shuang Yang
Summary: Subduction of mantle lithosphere plays a significant role in intraplate orogeny, but its kinematic response in the upper crust is still poorly understood. Sandbox experiments comparing mantle-subduction-type convergence and traditional indentation-type convergence reveal differences in orogenic architecture and deformation kinematics. Changes in convergence mode lead to distinct structural relics, such as out-of-sequence faulting and in-sequence thrusting. The influence of mantle-subduction-type convergence is concentrated within the subducting plate in the presence of combined convergence involving opposite-direction indentation and mantle-subduction. These findings have implications for understanding the geodynamics of other intraplate orogens.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Review
Geosciences, Multidisciplinary
Linlin Li, Qiang Qiu, Zhigang Li, Peizhen Zhang
Summary: The South China Sea region is at risk of potential tsunamis from multiple sources, including subduction zones, fault zones, submarine landslides, and volcanic islands. These infrequent but potentially devastating tsunamis pose a great threat to coastal areas, fisheries, and deep-sea oil and gas exploitation. Recent progress in tsunami hazard assessment in the region has focused on submarine earthquakes and landslides, using both deterministic and probabilistic approaches. Simulations of tsunamis generated by typical earthquakes in the Manila Trench, fault zones, and continental slopes have provided valuable insights into the tsunamigenic mechanisms and key characteristics of tsunamis in the South China Sea region. However, there are still research gaps and key issues that need to be addressed in future studies.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Chuanyong Wu, Jianming Liu, Xiaohui He, Zhigang Li, Wenjun Zheng
Summary: In the Urumqi foreland thrust system, the Urumqi foreland thrust belt is a typical active wedge thrust system with potential seismic hazards. Multiple surface ruptures may form within a certain range if a large earthquake occurs.
Article
Geosciences, Multidisciplinary
Liguo Li, Zhigang Li, Chuang Sun, Weitao Wang, Xiangming Dai, Yipeng Zhang, Hao Liang, Binbin Xu, Xiancan Wu, Liangwei Lv
Summary: Researchers have established a 3D geological model by integrating multidisciplinary data, revealing the surface and deep coupling relationships of major active faults in the region and calculating the potential moment magnitudes of these faults. The findings provide important references for regional geological research and earthquake disaster prevention.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Bin-Bin Xu, Yang Wang, Zhu-Qi Zhang, Yong-Gang Yan, Xiao-Hui He, Ming Hao, Wei-Tao Wang, Zhi-Gang Li, Yi-Peng Zhang, Qing-Ying Tian, Yue-Jun Wang, Wen-Jun Zheng, Pei-Zhen Zhang
Summary: Indo-South China region, located between the Indian Plate and South China Block, experiences intense crustal deformation and seismic hazards. The relative motion between India and South China is mainly accommodated by dextral slip and contraction on the western side of the Shan Plateau, and sinistral slip and extension on the eastern side. Other structural features in the region also exhibit different types of slip and contraction. The complex pattern of deformation in the region is a result of interactions among various geodynamic processes.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Chuang Sun, Zhigang Li, Wenjun Zheng, Dong Jia, Rafael Almeida, Gege Hui, Yipeng Zhang, Zhiyuan He, Shuang Yang, Xiaogen Fan
Summary: This study investigates the effects of topographic loading and inherited faults on the formation and activation of wedge front fault systems through sandbox experiments. The results show that smaller topographic loading favors gentle-dipping wedge front thrusts, while larger topographic loading promotes the development of steep wedge front faults. Inherited faults act as zones of frictional weakness and promote deformation localization, with steep faults buttressing nearby instead of directly slipping themselves.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Gege Hui, Peizhen Zhang, Zhigang Li, Weitao Wang, Litian Hu, Guanhua Li, Yipeng Zhang, Chuang Sun, Sanzhong Li, Hao Liang, Tianguang Li, Jianglong Zheng
Summary: This paper analyzes the deep structural and stratigraphic elements along the Littoral Fault Zone (LFZ) using newly collected enhanced images provided by 2D long-offset multichannel seismic reflection profiles. The study aims to advance the understanding of the LFZ and its controlling effect on the tectonic and sedimentary processes that led to the formation of the Pearl River Mouth Basin (PRMB).
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Xiancan Wu, Zhigang Li, Xue Yang, Chuang Sun, Weitao Wang, Rafael Almeida, Xiangming Dai, Yipeng Zhang, Binbin Xu, Hao Liang, Gege Hui, Liangwei Lv, Weiwang Long
Summary: Our study establishes fundamental geometric relationships for curved thrust fault-propagation folds by examining the geometries and kinematics of three contractional structures at different scales. We successfully reproduce the fold geometry with a smoothly curving backlimb and an abrupt forelimb, and discover that the deformation of the folded backlimb is a combination of limb rotation and kink-band migration. Our results show that curved faults do not experience greater slips compared to planar faults of similar dips. The choice of fault geometry is crucial for the deformation of folded backlimb and landform surface.
JOURNAL OF STRUCTURAL GEOLOGY
(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)
