Article
Geochemistry & Geophysics
Gianfranco Di Vincenzo, Gaston Godard, Giancarlo Molli
Summary: This study investigated the timing and evolution of tectono-metamorphic events in the Alpi Apuane by examining white mica samples. The research highlighted the importance of detailed microscale characterization and careful preselection of samples for accurate results.
Article
Geosciences, Multidisciplinary
Farzaneh Shakerardakani, Franz Neubauer, Manfred Bernroider, Fritz Finger, Christoph Hauzenberger, Johann Genser, Michael Waitzinger, Behzad Monfaredi
Summary: This study reports the metamorphic conditions and evolution of the Dorud-Azna metamorphic units in the central part of the Sanandaj-Sirjan zone (SSZ), Iran. The results reveal the polyphase metamorphism in two different basement units and provide new insights into the tectonic history of the SSZ. The findings suggest the influence of rift and plate collision processes, reflecting various stages of a Wilson cycle.
GEOSCIENCE FRONTIERS
(2022)
Article
Geochemistry & Geophysics
Sanna Holm-Alwmark, Fred Jourdan, Ludovic Ferriere, Carl Alwmark, Christian Koeberl
Summary: This study focuses on the Puchezh-Katunki impact structure in Russia, accurately dating its formation to 195.9 +/- 1.0 Ma using 40Ar/39Ar data. The research challenges previous temporal correlations between the impact event and multiple extinction events, emphasizes the importance of careful sample preparation and methodology in overcoming 40Ar issues, and highlights the need for caution when suggesting connections between specific impact events and extinction events.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Philippe Munch, Jacinthe Caillaud, Patrick Monie, Olivier Grauby, Michel Corsini, Julia Ricci, Adrien Romagny, Melody Philippon, Bruno Lanson, Ali Azdimousa, Abdelkhalak Ben Moussa, Nicolas Arnaud
Summary: This study provides direct dating of brittle deformation in the internal zones of the Rif chain, revealing an E-W extension phase between 18-15 Ma followed by a shift to NNW-SSE direction from 15 to 11 Ma. The findings highlight different cooling histories between footwall and hangingwall units, with growth of authigenic illite being dated during exhumation.
Review
Geosciences, Multidisciplinary
Yang Wu, Xiu-Juan Bai, He-Sheng Shi, Li-Yan He, Hua-Ning Qiu
Summary: This paper provides a review of dating methods relying on the K-Ar and Rb-Sr isotopic decay systems applied in sedimentary rocks. It discusses the sample preparation and analytical techniques associated with these methods and summarizes their applications in various sedimentary settings. The paper also highlights the use of Rb-Sr and 40Ar/39Ar dating in determining depositional ages and trapped ancient atmospheric argon components in chert.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Alan L. Deino, Clifford Heil, John King, Lindsay J. McHenry, Ian G. Stanistreet, Harald Stollhofen, Jackson K. Njau, Joshua Mwankunda, Kathy D. Schick, Nicholas Toth
Summary: The Olduvai Gorge Coring Project in Tanzania drilled cores at three sites in the Olduvai Basin, developing a chronostratigraphic framework. Through dating, paleomagnetic stratigraphy, and tephrochemical correlation, they obtained realistic age estimates. The age models revealed varying sedimentation rates in the basin's history and provided new estimates for the basal contacts of upper stratigraphic units in Olduvai Gorge.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geochemistry & Geophysics
Augustin Dekoninck, Gilles Ruffet, Julien Baptiste, Robert Wyns, Simon Philippo, Yishen Zhang, Olivier Namur
Summary: This study discusses the hydrothermal formation of romanechite in the Romane`che Mn deposit and the significance of its age by combining ore petrogenesis and 40Ar/39Ar ages. The study confirms the feasibility of romanechite 40Ar/39Ar dating and identifies a period of at least c. 7.6 My of discontinuous hydrothermal activity in the Massif Central.
Article
Geochemistry & Geophysics
Gianfranco Di Vincenzo
Summary: Using multicollector 40Ar/39Ar laser dating, the age of the Ries impact related to moldavites has been determined to be 14.7355 +/- 0.0039 Ma, providing insight into the impact event and the chronological implications.
Article
Geography, Physical
Sander L. Hilgen, Eduard Pop, Shinatria Adhityatama, Tom A. Veldkamp, Harold W. K. Berghuis, Indra Sutisna, Dida Yurnaldi, Guillaume Dupont-Nivet, Tony Reimann, Norbert Nowaczyk, Klaudia F. Kuiper, Wout Krijgsman, Hubert B. Vonhof, Dian Rahayu Ekowati, Gerrit Alink, Ni Luh Gde Dyah Mega Hafsari, Olafianto Drespriputra, Alexander Verpoorte, Remco Bos, Truman Simanjuntak, Bagyo Prasetyo, Josephine C. A. Joordens
Summary: This study aims to establish an accurate age control for the fossils found at the Trinil site in Java, Indonesia. By applying various dating methods and documenting new stratigraphic sections, the researchers identified two distinct fossil-rich channel fills with ages ranging from 830-773 ka to 450 +/- 110 ka. The presence of fossils from different time periods challenges the assumption of a homogeneous biostratigraphic unit at the Trinil site.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Bo Liu, Zhengle Chen, Feng Yuan, Bo Wu, Xionghua Zhang, Fengbin Han, Wengao Zhang, Hailong Huo, Jilin Li, Mengmeng Qu, Tongyang Zhao, Qiong Han, Ping Li, Dong Xia
Summary: The South Central Tianshan Shear Zone, located in the southern margin of the Central Tianshan Block in northwest China, provides important insights into the history of plate amalgamation in the southwestern margin of the Central Asian Orogenic Belt. This study focuses on the deformation within the Kawabulake area in East Tianshan and sheds light on the late Paleozoic tectonic history of the region.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
P. W. Ball, G. G. Roberts, D. F. Mark, D. N. Barfod, N. J. White, B. H. Lodhia, M. M. Nahdi, S. Garni
Summary: Harrat Rahat is the largest volcanic field in Saudi Arabia and has been active from around 10 Ma to the present day. Recent eruptions at Harrat Rahat have been extensively studied, but the evolution of its oldest lava flows, known as the Shawahit Basalt, is poorly understood. In this study, we collected and analyzed samples from Harrat Rahat, focusing on the Shawahit unit. We found that the volcanic activity at Harrat Rahat was initiated by a mantle plume beneath a thinned lithosphere, and the changes in geochemistry can be attributed to a decrease in melt productivity and contamination.
Article
Geosciences, Multidisciplinary
R. Spikings, A. Paul, C. Vallejo, P. Reyes
Summary: The gabbros and ultramafic rocks of the Huargualla Gabbro unit in Ecuador were derived from asthenospheric sources with minor crustal contamination and formed part of the Central Iapetus Magmatic Province. These rocks represent the only igneous record of Iapetus rifting north of the Huancabamba deflection in South America. The age and composition of the Huargualla Gabbro unit is consistent with the reconstruction by Tegner et al. (2019), suggesting juxtaposition of Baltica and northwestern Gondwana within Panotia.
Article
Geochemistry & Geophysics
M. O. Naumenko-Dezes, I. M. Villa, Y. Rolland, S. Gallet, P. Lanari
Summary: Museum-grade mica megacrysts from the Phalaborwa phlogopite and Rubikon pegmatite were studied for their compositional and chronological heterogeneities. The research revealed that the micas had significant variations in both element concentrations and ages within individual subgrains. The recrystallization processes were likely triggered by post-magmatic hydrothermal events, leading to variable loss of argon at a subgrain scale. These observations suggest that thorough petrological investigations and 40Ar/39Ar systematics are essential for diagnosing recrystallization events.
Article
Geochemistry & Geophysics
Hyun-Ok Choi, Jonguk Kim, Jihye Oh, Chang Hwan Kim, Soon Young Choi, Won Hyuck Kim, Chan Hong Park
Summary: This study utilized mineralogy and geochemistry data from submarine volcanic rocks collected from various seamounts in the southwest of the East Sea to investigate the characteristics of magmas' sources, evolution, and storage conditions. The analyses revealed information about the ages of the samples, the compositions of rocks, and the thermobarometric conditions associated with Quaternary volcanism, shedding light on the formation and evolution of these seamounts.
Article
Geochemistry & Geophysics
Olga Kiseleva, Pavel Serov, Evgenia Airiyants, Aleksey Travin, Dmitriy Belyanin, Brain Nharara, Sergey Zhmodik
Summary: This study reports the first radiogenic Nd-Sr isotope data in the magmatic rocks island-arc ophiolite assemblage from the middle branch of the East Sayan ophiolite complexes. The results provide valuable insights into the geodynamic processes in this region of southern central Siberia, showing different sources and formation processes for different geochemical types of magmatic rocks.
Article
Geosciences, Multidisciplinary
Inna Safonova, Alina Perfilova, Olga Obut, Pavel Kotler, Shogo Aoki, Tsuyoshi Komiya, Bo Wang, Min Sun
Summary: This paper presents U-Pb detrital zircon ages, geochemical data, and Nd-Hf isotope data from sandstones of eastern Kazakhstan, suggesting a juvenile character of igneous rocks in the provenance and a derivation from one or more intra-oceanic arcs. The data from eastern Kazakhstan support the existence of an extended Pacific-type subduction system in the western Paleo-Asian Ocean during the Devonian-early Carboniferous time.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Computer Science, Artificial Intelligence
Xianhe Wang, Bo Wang, Shu Liu, Huaxiong Li, Tianxing Wang, Junzo Watada
Summary: This paper proposes a fuzzy portfolio selection model based on three-way decision and cumulative prospect theory, which mitigates the two main shortcomings in existing studies by allocating prospect values in the action set and constructing a tri-partition of candidate securities according to three-way decision theory. Experimental results demonstrate that this approach increases investment return and reduces investor risk.
INTERNATIONAL JOURNAL OF MACHINE LEARNING AND CYBERNETICS
(2022)
Article
Geosciences, Multidisciplinary
Jiashuo Liu, Bo Wang, Xinghua Ni, Fang Song, Zhaochen Sun, Ju Deng, Yingying Li
Summary: By conducting field structural investigations and geological studies in the Dahalajunshan area of the Yili Block in Northwest China, we have identified five tectonic and magmatic events that reveal the Late Paleozoic tectonic evolution of the SW Central Asian Orogenic Belt.
Article
Geology
Dmitry Konopelko, Inna Safonova, Inna Perfilova, Yury Biske, Rustam Mirkamalov, Farid Divaev, Pavel Kotler, Olga Obut, Bo Wang, Min Sun, Natalia Soloshenko
Summary: The study provides detailed data on pre-Devonian clastic sediments from the western Uzbek Tienshan, indicating their formation within a narrow time range and suggesting their origin from old rocks, partly possibly from continental arcs. The presence of ancient arc-type rocks in the South Tienshan implies the existence of a large arc system that once provided clastic material for Paleozoic sediments in the region.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Inna Safonova, Alina Perfilova, Ilya Savinskiy, Pavel Kotler, Min Sun, Bo Wang
Summary: This paper presents the U-Pb detrital zircon ages, Hf-in-zircon isotope ratios, and geochemical and Nd data of sandstones from Pacific-type orogenic belts and related accretionary complexes. The study reveals the tectonic evolution of these belts and the characteristics of their source magmatic arcs.
Article
Computer Science, Information Systems
Xuanning Song, Bo Wang, Pei-Chun Lin, Guangyu Ge, Ran Yuan, Junzo Watada
Summary: With the increasing penetration of renewable energy, uncertainty has become a major challenge for power systems operation. This paper proposes a decision-making approach with robotic assistance, using advanced clustering and reduction methods to obtain scenarios of renewable generation and solving the problem with an improved particle swarm optimization and mathematical solver.
INFORMATION SYSTEMS FRONTIERS
(2022)
Article
Geochemistry & Geophysics
Bryan Cochelin, Bo Wang, Jiashuo Liu, Shenghua Lu, Liangshu Shu, Charles Gumiaux, Yan Chen, Fang Song
Summary: This study aims to investigate the impact of late anatexis in the core of polycyclic basements, specifically the Cathaysia Block in South China. Field mapping and detailed structural and kinematic analyses were conducted in the southern part of the Yunkai massif, revealing strain partitioning and gneiss dome formation induced by anatexis. The results indicate that the gneiss domes and plutons in the cores experienced magmatic to sub-solidus deformation, while retrogressive shearing characterized strain localization at the top. Zircons U-Pb dating suggests that regional partial melting and gneiss doming occurred in the Triassic and possibly as early as the Late Permian. The study also proposes that orogen-parallel crustal flow in the Yunkai massif is controlled by the subduction of the Paleo-Pacific plate at the eastern margin of the South China Block.
Article
Computer Science, Artificial Intelligence
Shu Liu, Bo Wang, Huaxiong Li, Chunlin Chen, Zhi Wang
Summary: This paper discusses the problem of continual portfolio selection in dynamic environments and proposes an incremental reinforcement learning approach to address this problem. The method adjusts the portfolio policy in two steps to adapt to the changes in the market.
INTERNATIONAL JOURNAL OF MACHINE LEARNING AND CYBERNETICS
(2023)
Article
Computer Science, Artificial Intelligence
Xianhe Wang, Bo Wang, Tiantian Li, Huaxiong Li, Junzo Watada
Summary: In this study, a novel three-way decisions model is proposed based on cumulative prospect theory and outranking relations, which introduces a boundary region and reduces decision risk. Three strategies are proposed to design the model by constructing an outranked set for each alternative and a hybrid multi-criteria decision-making matrix.
APPLIED SOFT COMPUTING
(2023)
Article
Computer Science, Information Systems
Yifei Wu, Bo Wang, Ran Yuan, Junzo Watada
Summary: This paper proposes a data-driven approach for parallel scenario generation to improve the forecasting performance of renewable generation and capture uncertainty. The approach utilizes Gramian angular field (GAF) for processing time sequences and constructs style-based super-resolution models. The effectiveness of the approach is verified using real-world datasets and compared with advanced benchmarks.
INFORMATION SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Jiajun Shi, Qianyi Zhang, Xi Yin, Jiahui Ye, Shengqing Gao, Chen Chen, Yaxuan Yang, Baojuan Wu, Yuping Fu, Hongmei Zhang, Zhangding Wang, Bo Wang, Yun Zhu, Hongyan Wu, Yongzhong Yao, Guifang Xu, Qiang Wang, Shouyu Wang, Weijie Zhang
Summary: Metastasis in breast cancer is strongly related to N6-methyladenosine (m6A) modification and its associated regulators, particularly the overexpression of m6A reader IGF2BP1. Mechanistically, the study identified USP10 as the deubiquitinase for IGF2BP1 and established its role in stabilizing IGF2BP1, leading to increased breast cancer metastasis. Furthermore, IGF2BP1 directly recognized and bound to m6A sites on CPT1A mRNA, enhancing its stability and mediating breast cancer metastasis. Clinically, high levels of USP10, IGF2BP1, and CPT1A were associated with poor outcomes in breast cancer patients. These findings indicate the potential of the USP10/IGF2BP1/CPT1A axis as a prognostic biomarker and therapeutic target for breast cancer.
INTERNATIONAL JOURNAL OF BIOLOGICAL SCIENCES
(2023)
Article
Thermodynamics
Jinhao Shi, Bo Wang, Kaiyi Luo, Yifei Wu, Min Zhou, Junzo Watada
Summary: In this paper, a novel wind power interval forecast method is proposed for multiple wind farms in near regions based on machine learning techniques. The proposed method, called Generative Critic Networks (GCN), applies gradient descent algorithm and function approximation to improve the forecasting performance, and utilizes Multi-Task Learning (MTL) to achieve a joint interval forecast of multiple wind farms considering their spatial correlation. Experimental results show that the proposed algorithm can obtain higher-quality prediction intervals and reduce the interval width by at least 9.5% compared to other methods.
Article
Engineering, Electrical & Electronic
Ran Yuan, Bo Wang, Yeqi Sun, Xuanning Song, Junzo Watada
Summary: In this paper, a reliable and accurate renewable scenario generation model is proposed using style-based generative adversarial networks followed by a sequence encoder network. It generates accurate and reliable day-ahead scenarios directly from historical data through different-level scenario style controlling and mixing, thus achieving better characterization of renewable spatial-temporal dynamics.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2023)
Article
Geosciences, Multidisciplinary
Xin Zhu, Yan Chen, Bo Wang, Yunpeng Dong, Michel Faure, Xinghua Ni, Florian Duval
Summary: Through the study of Paleomagnetic data in the Beishan region of Northwest China in the Early Permian, the tectonic transition and paleogeography of the southern Central Asian Orogenic Belt (CAOB) during the late Paleozoic to early Mesozoic have been revealed. The research results show that there is no significant relative movement between the Beishan region and the Dunhuang Block since the Early Permian, indicating the absence of a wide Early Permian ocean between them. The southern CAOB had a WNW-ESE distributed paleogeography in the Early Permian, and large-magnitude strike-slip displacements played a key role in its tectonic activity since then.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Computer Science, Information Systems
Yuke Li, Pin Wang, Ching-Yao Chan
Summary: Multi-person action forecasting is a crucial step in video understanding and this paper proposes a novel RElational Spatio-TEmPoral learning (RESTEP) approach to address this challenge. RESTEP combines spatial and temporal information in a single pass through relational reasoning, enabling the simultaneous prediction of actions for all actors in a scene. Experimental results demonstrate that RESTEP outperforms existing methods on multiple datasets.
IEEE TRANSACTIONS ON MULTIMEDIA
(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)