Article
Geology
Remziye Akdogan, Istvan Dunkl, Aral I. Okay, Xiumian Hu, Gultekin Topuz
Summary: Apatite fission-track and (U-Th)/He ages from Carboniferous to Eocene siliciclastic rocks in the Istanbul Zone of NW Turkey suggest three major deformation and uplift/exhumation phases. These phases are attributed to orogeny, accretion of oceanic plateaus, and closure of oceanic domains in the region.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Safak Altunkaynak, Alp Unal, Gursel Sunal, Omer Kamaci, Istvan Dunkl
Summary: This study presents robust apatite (U-Th)/He thermochronology data from the Eybek, Solarya, and ?ataldag? plutons in NW Turkey. The results show that the Solarya and ?ataldag? plutons have similar ages, while the Eybek pluton is younger. Exhumation rates and thermal modelling indicate fast uplift and exhumation of the Solarya and ?ataldag? plutons during early to middle Miocene.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Qiang Yu, Zhanli Ren, Rongxi Li, Chung Ling, Tao Ni, Wanshan Lei, Baojiang Wang, Xiaoli Wu, Xiaoli Qin, Xianghe Lei
Summary: By analyzing the tectonothermal history of the Yanchang Formation in the western Weibei Uplift and northwestern Weihe Basin, the cooling history of the Upper Triassic source rock in the southwestern North China Plate can be reconstructed. Apatite fission-track and (U-Th-Sm)/He analysis were used to recover the cooling and uplift history of the Upper Triassic. The results showed significant differences in time-space relationships and cooling rates, highlighting the importance of the study for understanding the tectonothermal evolution of the Upper Triassic in the southwestern North China Plate.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Wei Xu, Yongshui Zhou, Jiong Zhang, Yi Li
Summary: In this study, new apatite fission track (AFT) and (U-Th)/He ages were used to reconstruct the thermal history of the Uliastai Sag in the northern Erlian Basin. The analysis of sandstone samples from boreholes showed that AFT ages ranged from 30-90 Ma, apatite (U-Th)/He ages ranged from 2 to 30 Ma, and zircon (U-Th)/He ages ranged from 40 to 160 Ma. The time-temperature paths revealed the subsidence, cooling/exhumation, and stability of the Uliastai Sag during different geological periods. The tectonic evolution and volcanic activities in the Erlian Basin may be attributed to complex mantle dynamics.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Alice Recanati, Nistor Grozavu, Younes Bennani, Cecile Gautheron, Yves Missenard
Summary: This study investigates the impact of various parameters on apatite (U Th Sm)/He (AHe) thermochronological dates using advanced data mining techniques. By excluding the influence of other parameters on helium retention, it is concluded that the chemistry and crystal dimensions of apatite do not significantly affect helium retention or AHe date dispersion. The research suggests that machine learning has the potential to correct errors or detect anomalies in predicting AHe dates.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Shida Song, Jiangang Li, Xiaoyan Liu, Yadong Wang, Wentian Liang, Sihua Yuan
Summary: This study uses apatite fission track data to investigate the exhumation history of the Bogda Range in the Eastern Tianshan. The results show that the Bogda experienced three episodes of cooling during the Late Triassic, Late Cretaceous, and Late Miocene, possibly related to its formation, tectonic extension in the central-eastern Asian regime during the Cretaceous, and the India-Eurasia collision since the beginning of the Cenozoic.
Article
Geosciences, Multidisciplinary
Ruxin Ding
Summary: Low temperature thermochronology is important for studying the tectonic evolution of the upper crust. This study attempts to separate the apatite fission-track age from the apatite fission-track length and combine the fission-track lengths with the respective apatite U-Th/He age for thermal history modeling. The results show that this combination can constrain the thermal history of apatite fission-track lengths in different zones. This approach provides an alternative way of determining thermal histories without relying solely on apatite fission-track age.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
J. Spalding, J. W. Powell, D. A. Schneider, K. M. Fallas
Summary: The Peel Plateau in the northern Canadian Cordillera has experienced multiple burial and unroofing events since the Phanerozoic, with evidence from unconformities. This study uses apatite fission-track thermochronology to investigate the thermal history of the region. The results suggest that the uppermost Paleozoic strata reached maximum burial temperatures in the Triassic and were reheated under a Cretaceous-Paleocene foreland basin.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Chemistry, Analytical
Lin Wu, Jie An, Fei Wang, Liekun Yang, Xiaoming Shen, Zhiyong Zhang, Chao Huang, Rong Ren, Bo Liu, Wenbei Shi, Yinzhi Wang
Summary: The in situ laser (U-Th)/He and U-Pb double dating technique using zircon has been proven to be a powerful tool for sedimentary provenance studies. The recently developed laser microanalysis technique offers advantages such as higher spatial resolution and improved safety. A new natural zircon reference material, SA01, has been reported for in situ (U-Th)/He and U-Pb double dating, which showed consistent results with traditional single-crystal laser fusion He determination and U-Th isotope dilution.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Geochemistry & Geophysics
Ruxin Ding, Weihao Chen, Cleber Soares, Weisheng Hou, Zilong Li, Yangshijia Li, Rongli Huang, Heping Zou
Summary: This study used different dating methods to determine the timing of fault activity, and the results indicate that the Guangsan fault was still active during the period of 70-65 million years ago, leading to rapid uplift.
Article
Geosciences, Multidisciplinary
Yumao Pang, Yinqiang Zhao, Zuozhen Han, Xunhua Zhang, Fengchen Liu, Xingwei Guo, Xiaoqing Zhu
Summary: The Jiaonan uplift is a significant orogenic belt on the East Asian continental margin. Studying the exhumation and cooling history of Mesozoic intrusive rocks in this area provides valuable insights into regional tectonic evolution. New U-Pb zircon data and thermal modeling results indicate three thermal evolutionary stages after the emplacement of Lower Cretaceous granites, suggesting a unified deep geodynamic background and the influence of Pacific subduction and/or India-Asia collision on the cooling events since Oligocene.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Stijn Glorie, Angus L. Nixon, Gilby Jepson, Jack Gillespie, Cameron Warren, Fun Meeuws, Alexander Simpson, Wenjiao Xiao
Summary: The Altai Mountains, located thousands of kilometers away from plate margins, are a young and steep mountain belt. The Fuyun area, at the southern margin of the Chinese Altai, provides important insights into the Meso-Cenozoic deformation and exhumation history of the Altai. New data on apatite U-Pb, trace element, and fission track analysis shed light on the Meso-Cenozoic tectonic history, suggesting metasomatism in the Middle-Late Jurassic and rapid cooling and exhumation during the early Late Cretaceous.
Article
Geochemistry & Geophysics
William R. Guenthner
Summary: Radiation damage plays a crucial role in controlling He diffusion in zircon, leading to correlations between (U-Th)/He dates and effective uranium concentration. The integration of alpha damage annealing kinetics into the ZRDAAM model shows that lower temperatures result in slightly younger model dates, while higher uranium concentrations lead to older dates. These differences are most pronounced in thermal histories with extended periods at low temperatures.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
Akeek Maitra, Aneta A. Anczkiewicz, Robert Anczkiewicz, Istvan Dunkl, Dilip K. Mukhopadhyay
Summary: The study utilized apatite fission track and (U-Th)/He thermochronology to reveal the tectonic evolution of rocks in the Subathu basin in the Indian Himalayas, showing multiple thermal events since the late Paleocene-early Eocene, primarily influenced by internal thickening and shearing. The thermal history of the Siwalik rocks indicates rapid heating between 4 and 1 million years ago, followed by rapid cooling, associated with thrusting along the Main Frontal Thrust placing the foreland basin over the Gangetic Plains. The results are similar to those obtained for the foreland basin in Nepal, suggesting synchronous movement along the youngest major discontinuity of the Himalayas.
Article
Geology
Zhiyuan He, Stijn Glorie, Fujun Wang, Wenbin Zhu, Ana Fonseca, Wenbo Su, Linglin Zhong, Xin Zhu, Johan De Grave
Summary: This study re-evaluates the thermo-tectonic evolution of the Bogda Shan mountain range using apatite fission track thermochronology. The results suggest slow to moderate basement cooling during the early Mesozoic, explaining the preservation of low-relief Mesozoic erosion surfaces. In addition, partial resetting of the apatite fission track system during the Cretaceous and coincident ages with exhumation pulses in the Chinese North Tianshan were observed. Based on a comprehensive summary of published data, the authors argue for a Mesozoic building of the Bogda-Balikun-Harlik mountain chain and relatively modest Cenozoic exhumation.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Bangsheng Zhao, Rongxi Li, Xiaoli Qin, Delu Li, Xiaoli Wu, Ahmed Khaled, Wei Zhou, Di Zhao, Qi Liu, Yanni Zhang
Summary: This study investigates the source and formation timing of solid bitumen in the Sinian Dengying Formation dolomite in the northern Sichuan Basin using biomarkers and Re-Os geochronology. The results show that the high thermal maturity solid bitumen originated from marine shale and was formed by the thermal cracking of crude oil. Initial oil generation began in the Late Cambrian to the Early Silurian, leading to a giant paleo-oil accumulation during the Late Triassic, with thermal cracking occurring from the Late Triassic to the Early Cretaceous. The Re-Os isotopes yielded ages that represent the final timing of dry gas generation.
MARINE AND PETROLEUM GEOLOGY
(2021)
Meeting Abstract
Oncology
Nagla Fawzy Abdel Karim, Mahran Shoukier, Ihab Eldessouki, Ahmed Khaled, John Morris
JOURNAL OF CLINICAL ONCOLOGY
(2021)
Article
Oncology
Sophie Cousin, Jean-Yves Blay, Irene Brana Garcia, Johann S. de Bono, Christophe Le Tourneau, Victor Moreno, Jose Trigo, Christine L. Hann, Arun A. Azad, Seock-Ah Im, Philippe A. Cassier, Christopher A. French, Antoine Italiano, Vicki L. Keedy, Ruth Plummer, Marie-Paule Sablin, Matthew L. Hemming, Geraldine Ferron-Brady, Anastasia Wyce, Ahmed Khaled, Antara Datta, Shawn W. Foley, Michael T. McCabe, Yuehui Wu, Thierry Horner, Brandon E. Kremer, Arindam Dhar, Peter J. O'Dwyer, Geoffrey I. Shapiro, Sarina A. Piha-Paul
Summary: The study demonstrated that Molibresib at a once daily dose of 75 mg did not show unexpected toxicities, with common treatment-related adverse events including thrombocytopenia, nausea, and decreased appetite. Antitumor activity was observed in NC and CRPC, although predefined clinically meaningful response rates were not met for any tumor type. Investigations into combinatorial approaches using BET inhibition to eliminate resistance to other targeted therapies are warranted.
INTERNATIONAL JOURNAL OF CANCER
(2022)
Article
Energy & Fuels
Ahmed Khaled, Rongxi Li, Shengli Xi, Bangsheng Zhao, Xiaoli Wu, Qiang Yu, Yanni Zhang, Delu Li
Summary: The Cuizhuang Formation dark shale in the Yuncheng Basin is considered a potential petroleum source rock, where organic matter enrichment is influenced by quartz and clay minerals. The shale has relatively high TOC content, organic matter maturity, and is characterized by type I kerogen, deposited in a passive continental margin setting.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Analytical
Ahmed Khaled, Ahmed M. Salman, Nawaf S. Aljehani, Ibrahim F. Alzahem, Ridha S. Almikhlafi, Radwan M. Noor, Yasser M. Seddiq, Majed S. Alghamdi, Mostafa Soliman, Mohamed A. E. Mahmoud
Summary: This paper presents a novel electrostatic Roll/Pitch MEMS gyroscope with in-plane drive mode and out-of-plane sense mode. The proposed structure decouples the drive and sense modes, and a multi-height deep reactive ion etching process is used to enhance this decoupling. Experimental results show a good agreement between the analytical model and the actual measurements.
Article
Multidisciplinary Sciences
Muhammed Elhadi, Ahmed Msherghi, Ahmed Khaled, Ahmed Alsoufi, Abdulmueti Alhadi, Asraa Kareem, Aimen Ashini, Tahani Alsharif, Alarabi Alhodiri, Emtenan Altaeb, Mona Hamed, Ahmed Itrunbah, Soha Mohmmed, Hind Alameen, Hanadi Idheiraj, Anshirah Shuwayyah, Sara Alhudhairy, Arowa Alansari, Wisam Abraheem, Hend Akl, Taha Nagib, Ayman Almugaddami, Basheer Aljameel, Siba Muamr, Suhir Alsuwiyah, Ateka Alsghair, Enas Soula, Anis Buzreg, Fatma Alagelli, Abdulfatah Aldireewi, Ahmed Bareem, Entisar Alshareea, Asmhan Gemberlo, Ahmed Zaid
Summary: This study aimed to determine the impact of the COVID-19 pandemic on the mental health of the Libyan population. The results showed that a significant number of respondents reported severe depressive symptoms (13.6%), severe anxiety symptoms (5.6%), and post-traumatic stress disorder (19.8%). Factors such as young age, being female, unmarried, educated, victims of domestic violence or abuse, work suspension, increased workload, financial issues, suicidal thoughts, and having a family member with or hospitalized due to COVID-19 were significantly associated with a higher likelihood of mental health disorders.
Article
Oncology
Nagla Abdel Karim, Asad Ullah, Imran Ahmad, Elmustapha Bahassi, Olugbenga Olowokure, Ahmed Khaled, Harold Davis, John C. Morris
Summary: Autophagy is a process that helps cells survive during stressful conditions or attacks from chemotherapy or radiation. In this study, the safety and efficacy of combining chloroquine or hydroxychloroquine with carboplatin and gemcitabine in patients with advanced solid tumors were evaluated.
FRONTIERS IN ONCOLOGY
(2022)
Article
Multidisciplinary Sciences
Alyaa Farid, Ali Hany, Ahmed Khaled, Gehan Safwat
Summary: This study aimed to measure and compare the levels of various cytokines in Egyptian SLE and Ps patients, and investigate the Th cell signaling pathways and types involved in autoimmune-mediated tissue injury. The results showed that cytokine levels were associated with disease activity and tissue injury.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2022)
Article
Multidisciplinary Sciences
Medhat H. Hashem, Dalal S. Alshaya, Areej S. Jalal, Nader R. Abdelsalam, Reham M. Abd El-Azeem, Ahmed E. Khaled, Amani S. Al-Abedi, Abdallah T. Mansour, Ahmed S. AlSaqufi, Manal E. Shafi, Hesham A. Hassanien
Summary: This study investigates the genetic variation and phylogenetic relationship of the rabbit fish, Siganus rivulatus, from the Red Sea and the Mediterranean Sea. The analysis of microsatellite and mitochondrial DNA markers reveals significant genetic differentiation between the two populations, with higher genetic diversity in the Red Sea samples.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Ahmed Khaled, Rongxi Li, Shengli Xi, Qiang Yu, Xiaoli Wu, Bangsheng Zhao, Yanni Zhang, Di Zhao
Summary: This study provides the first information on the formation, process, and influencing factors of hydrocarbon generation and expulsion potential of the Cuizhuang Formation source rock. The results reveal the reason behind the absence of commercial petroleum resources and highlight the role of the Middle Carboniferous tectonic event in the destruction of hydrocarbon reservoirs in the Yuncheng sub-basin.
GEOLOGICAL JOURNAL
(2022)
Article
Engineering, Chemical
Shereen M. S. Abdel-Hamid, Kareem M. Tharwat, Ahmed M. Gad, Ahmed T. Mahmoud, Mahmoud A. Emam, Ahmed M. Khaled, Mahmoud B. Elshishiny, Asmaa Ashraf Y. El-Sayed, Sohair T. Aly
Summary: The operating conditions of transesterification reaction for maximum yield of biodiesel from waste cooking oil were optimized using response surface methodology, resulting in promising results in terms of performance and emissions when tested in a diesel engine.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Xiaoli Qin, Rongxi Li, Lei Chen, Kun Jiao, Jinghua Cheng, Ahmed Khaled, Limiao Yao, Junnian Chen
Summary: Diagenetic facies are crucial in assessing and predicting reservoirs as they provide comprehensive information on deposition, diagenesis, and petrophysical properties. This study identified six types of diagenetic facies and analyzed their influence on the quality of low-permeability tight gas reservoirs. The findings showed that diagenetic facies A, with weak compaction, and B, C, and D, with strong dissolution, are effective reservoirs with porosity greater than 6.6% and permeability greater than 0.25 - 0.6 x 10(-3) μm2. The distribution areas of these facies serve as favorable areas for tight gas exploration and are important indicators for predicting tight gas in the Upper Paleozoic Shanxi Formation in the eastern Ordos Basin. This study presents a new petrographic method with practical and economic significance for reservoir prediction and natural gas exploration.
Article
Geosciences, Multidisciplinary
Qiang Yu, Baojiang Wang, Zhanli Ren, Xianyao Sun, Xianghe Lei, Ahmed Khaled, Qike Yang
Summary: Research on the faults and their evolutionary history in the Suhongtu-Dagu depressions since the Cretaceous provides a theoretical basis for the geological evaluation of coal seams in the Suhongtu Formation in the Yin'e Basin. Through various techniques, the study clarified the planar and profile distributions of faults, as well as their evolutionary history and the tectonic history of the depressions. The results revealed the variations in fault distribution and identified three types of faults, which played a strong role in controlling and influencing the development and modification of coal seams in the Cretaceous Suhongtu Formation.
FRONTIERS OF EARTH SCIENCE
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Konstantin Mishchenko, Ahmed Khaled, Peter Richtarik
Summary: This paper introduces two new optimization algorithms, ProxRR and FedRR, which show good performance in finite-sum minimization problems. ProxRR algorithm significantly accelerates the computation speed by evaluating the proximal operator only once per epoch. FedRR algorithm, as a special case of ProxRR applied to federated optimization, has a smaller communication footprint.
INTERNATIONAL CONFERENCE ON MACHINE LEARNING, VOL 162
(2022)
Article
Oncology
Nagla Abdel Karim, Asad Ullah, Hongkun Wang, Mahran Shoukier, Steven Pulliam, Ahmed Khaled, Nikhil Patel, John C. Morris
Summary: This study investigated the efficacy and safety of combination therapy with Bosutinib and pemetrexed in advanced solid tumors. The results showed that this combination therapy may have potential efficacy in previously treated patients.
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)