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Characterization of Arroyo Verde Epithermal Deposit: Paragenesis, Mineral Geochemistry, Geochronology and Fluid Inclusions in Lower Chon Aike Volcanism, Argentina J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Cecilia Pavón Pivetta, Leonardo Benedini, Paulo Marcos, Ma. Agustina Cócola, Mercedes Virginia Barros, Daniel Gregori, Leonardo Strazzere, Anderson Costa dos Santos, Mauro C. Geraldes
Arroyo Verde epithermal deposit, in the North Patagonia region of Argentina, is located within the Lower Chon Aike volcanism and is developed between 192.6 ± 2.5 Ma (mineralization host rock) and 189.5 ± 2.6 Ma (overlying lava). Marifil volcanic complex is the host rock for these veins, veinlets and breccias. This particular small deposit has developed low to intermediate sulphidation characteristics
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Characteristics of Paleontological Communities in Surface Sediments of the Southern South China Sea and Their Paleoclimatic and Paleoenvironmental Significance J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Jing Zhao, Li Zhang, Xiaoyan Wang, Jinglian Ge, Min Xu, Wei Chen, Mao Luo, Qianyong Liang, Qiuhua Yu, Shuaibing Luo, Wenkun Qie
Understanding the spatial and temporal distribution of different paleontological communities in the southern South China Sea (SCS) is fundamental to explore its paleoclimatic and paleoenvironmental changes. In this study, foraminifera, pollen and diatoms from 100 surface sediment samples covering 40 000 km2 of sea floor in the southern SCS were comprehensively investigated in terms of their assemblage
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Debris Flow Susceptibility Evaluation in Meizoseismal Region: A Case Study in Jiuzhaigou, China J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Yongwei Li, Linrong Xu, Yonghui Shang, Shuyang Chen
Jiuzhaigou is situated on a mountain-canyon region and is famous for frequent tectonic activities. An abundance of loose co-seismic landslides and collapses were produced on gullies after the Jiuzhaigou Earthquake on August 8, 2017, which was served as material source for debris flow in later years. Debris flow appears frequently which are seriously endangering the safety of people’s lives and properties
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Evaluation of the Relative Tectonic Activity from the Faults in the Gengma-Lancang-Menghai Seismic Belt (Southwestern China) J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Dan Wang, Youpu Dong, Zhipeng Xi, Dongyue Zhang, Jiaxin Duan, Huayu Yu, Liang Yu
The Gengma-Lancang-Menghai seismic belt, the southernmost part of the North-South seismic belt, is controlled by four active faults: the Nantinghe fault (NTHF), the Sanjianshan fault (SJSF), the Hanmuba-Lancang fault (HMB-LCF), and the Heihe fault (HHF), from northwest to southeast. However, the tectonic activity of the faults in the Gengma-Lancang-Menghai seismic belt has not been fully studied yet
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Hydrochemical Characterization, Controlling Factors and Water Quality of Surface Water in Shandong Province, North China J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Ran An, Jiutan Liu, Zongjun Gao, Changsuo Li, Yuming Peng
In this study, 90 surface water samples were collected from Shandong Province (SDP) in the dry and wet seasons and analyzed using statistical analysis, hydrochemical methods and water quality index (WQI). The content of main ions showed seasonal variations, with a higher average value in the dry season than in the wet season. Sampling points exhibiting high contents of the main chemical components
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Insight into the Origin of Iron Ore Based on Elemental Contents of Magnetite and Whole-Rock Geochemistry: A Case of the Bipindi Banded Iron Formations, Nyong Complex, SW Cameroon J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Landry Soh Tamehe, Huan Li, Sylvestre Ganno, Zuxing Chen, Yanick Brice Lemdjou, Safiyanu Muhammad Elatikpo
The Bipindi iron ore district is located in the central section of the Nyong Complex at the northwestern margin of the Congo Craton in Southwest Cameroon. This iron district contains numerous iron mineralization hosted by the Mewongo, Bibole, Kouambo, and Zambi banded iron formations (BIFs). These BIFs contain magnetite as the main iron ore mineral associated with pyrite, and gangue minerals are quartz
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Zircon Hf Isotope Mapping for Understanding Crustal Architecture and Its Controls on Mineralization during Early Cretaceous in the Southern Great Xing’an Range, NE China J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Feng Yuan, Huanan Liu, Shengjin Zhao, Mingjing Fan
Voluminous Early Cretaceous granitoids and associated large-scale ore deposits are distributed within the southern Great Xing’ an Range (SGXR), NE China. Based on previously published geochronology and zircon Hf-isotope data, Hf isotope mapping is undertaken to improve our understanding of crustal architecture and its controls on ore deposits. The ore-related Early Cretaceous granitoids were sourced
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Dynamic Effect of Landslides Triggered by Earthquake: A Case Study in Moxi Town of Luding County, China J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Hongfu Zhou, Fei Ye, Wenxi Fu, Bin Liu, Tian Fang, Rui Li
The dynamic effect is a very important issue widely debated by scholars when studying the genetic and disaster-causing mechanisms of earthquake-triggered landslides. First, the dynamic effect mechanism and phenomena of earthquake-triggered landslides were summarized in this paper. Then, the primary types of dynamic effects were further used to interpret the Mogangling landslide in Moxi Town of Luding
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Preliminary Results of the Seismicity Monitoring Experiment around the 2019 Mw5.4 Earthquake Epicenter in the Central South China Sea Basin J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Wenfei Gong, Aiguo Ruan, Xiongwei Niu, Zhenjie Wang, Pingchuan Tan, Xiaodong Wei, Wei Wang, Zhengyi Tong, Liqun Cheng, Fansheng Kong, Shaoping Lu, Jianke Fan, Weiwei Ding, Jinyao Gao, Chunguo Yang, Jiabiao Li
On September 5, 2019, a moderate earthquake of Mw5.4 unexpectedly occurred in the apparently quiescent central basin of the South China Sea. We immediately carried out a seismicity monitoring experiment around the epicenter by using broadband ocean bottom seismometers (OBS) for the following three scientific targets. The first is knowing the earthquake seismogenic mechanism, fault structure and further
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Characteristics and Genesis of Acid Drainage Contamination from a Rock Tunneling Project Site J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Yanyun Li, Zejiao Luo, Shihua Qi
While acid mine drainage (AMD) issues have become a topic of global concern, few studies have focused on acid drainage problems of non-mining activities. We conducted field research and a series of laboratory experiments to investigate the characteristics, release processes and formation of acid drainage contamination. Spoil rock samples and adjacent surface water, groundwater, soil and sediment samples
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Trace Element Mobility in Subducted Marble and Associated Eclogite: Constraints from UHP Rocks in the Shuanghe Area, Central-East China J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Xingao Hou, Zhiqiang Yu, Shefa Chen, Lei Liu, Yilin Xiao
In order to decipher element mobility in UHP meta-sedimentary rocks in the continental subduction zone, major and trace element compositions are investigated for a continuous profile from a representative UHP region in the Dabie Mountains. Among the lithologic contact zone, contents of K, Ca, LREE, and LILE exhibit varying degrees of downward trends in both marble and eclogite toward the contact zone
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Dynamic Stability and Fuzzy Reliability Analysis of Toppling Perilous Rock Under Seismic Excitation J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Linfeng Wang, Jixu Zhang, Wanchun Xia, Xiaoming Huang, Guojin Tan
To predict the occurrence of the collapse disaster in toppling perilous rock under the action of bidirectional earthquakes, the dynamic stability and fuzzy reliability calculation method of toppling perilous rock under the action of bidirectional earthquakes is proposed. First, the mass viscoelasticity model is used to simulate two main control surfaces of toppling perilous rock, the seismic dynamic
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SS-LASS Zircon Dating Deciphering Multiple Episodes of Anatexis in a Deeply-Subducted Continental Crust: An Example from Sulu Orogen, China J. Earth Sci. (IF 3.3) Pub Date : 2024-02-14 Peng Feng, Lu Wang, Xiawen Li, Wenjie Ding, Zhe Chen
‘Single shot’ laser-ablation split-stream (SS-LASS) technique analyzing unpolished zircon grains makes their thin rims tenable for determination, which thus offers great potential in deciphering the timing of multiple and short-lived episodes of anatexis and metamorphism in deeply-subducted continental crusts. Dominated granitic gneisses in the deeply subducted continental crust undergoing considerable
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A Deep Mantle Source for the Late Neoarchean Metamorphosed Basalts in Eastern Hebei, North China Craton: Insights from Whole-Rock Geochemistry and Sm-Nd Isotopes, and Zircon U-Pb-Hf Isotopes J. Earth Sci. (IF 3.3) Pub Date : 2024-02-01
Abstract The basalts within the greenstone belt worldwide serve as an ideal target to decipher the nature of Archean mantle sources and further to extend the understanding of the early stages of Earth’s evolution. To provide important insights into the issues, we carried out a detailed investigation of whole-rock geochemistry and Sm-Nd isotopes, and zircon U-Pb-Hf isotopes for the Late Neoarchean metamorphosed
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Cretaceous–Neogene Exhumation of the Daqing Shan, North China Constrained by Apatite Fission Track Thermochronology J. Earth Sci. (IF 3.3) Pub Date : 2024-02-01
Abstract The Daqing Shan (DQS) located in the Yinshan-Yanshan Orogenic Belt plays an important role in the Mesozoic to Cenozoic evolution of the North China Craton. However, the cooling and exhumation history since the Cretaceous is still controversial. Integrating the apatite fission track (AFT) data in both this study and previous works, a three-stage exhumation history from Cretaceous to Neogene
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A Novel Gymnosperm Wood from the Lopingian (Late Permian) in Zhangzi, Shanxi, North China and Its Paleoecological and Paleogeographic Implications J. Earth Sci. (IF 3.3) Pub Date : 2024-02-01
Abstract The Permian-Triassic transition saw extreme climatic changes that severely impacted the terrestrial ecosystem. Fossil plants, particularly fossil woods, are sensitive to climatic changes, and they, therefore, are unique materials revealing extreme environmental and climatic changes on land at that time. Abundant conifer woods were discovered in the Lopingian (Late Permian) strata of the Sunjiagou
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Long-Term Settlement Characterization of High-Filling Foundation in the Mountain Excavation and City Construction Area of the Yan’an New District, China J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Xiaokun Hou, Shengwen Qi, Yongtang Yu, Jianguo Zheng
Mountain Excavation and City Construction (MECC) represents a prominent anthropogenic endeavor aimed at facilitating urban expansion in the Loess Plateau of China. It is important to comprehend the long-term settlement behavior at MECC engineering sites to effectively assess the project’s success in reshaping landscapes and expanding urban areas. In this study, a typical MECC project, specifically
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Permian-Triassic Magmatism in the Qin-Fang Tectonic Belt, SW China: New Insights into Tectonic Evolution of the Eastern Paleo-Tethys J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Yun Zhou, Yongshan Zhao, Yongfeng Cai, Qiaofan Hu, Ce Wang
The granites of ambiguous geodynamic mechanism in the Qin-Fang tectonic belt (SW China) were studied in detail based on petrological, element geochemical, zircon U-Pb geochronological, and Hf isotopic data. LA-ICPMS U-Pb analyses on zircon yield ages of 248–245 Ma for the granites from the Qin-Fang tectonic belt. The geochemical data show that they are high-K, calc-alkaline, and peraluminous series
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Tensile Behavior Analysis of Loess Using Digital Image Correlation Method J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Xin Wei, Ling Xu
In this research, a new apparatus was developed to identify the tensile behavior of three loess samples from different regions. Influence of water contents on tensile strength characteristics was investigated. The variations of local longitudinal strains εxx field were analyzed using the DIC method. The design of narrow portion in the center of the soil sample provides an effective method for analyzing
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Crustal Electrical Structure of the Wuwei Basin, Lower Yangtze Region of China, and Its Geological Implications J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Xiaobo Zhang, Penghui Zhang, Meixing He, Dashuang He, Fagen Pei, Yaoyang Zhang, Yan Peng
The Wuwei Basin is one of the most important oil- and gas-bearing basins in the Meso-Cenozoic basin groups in the Lower Yangtze River region. It has great shale gas resource prospects. The formation mechanism of this basin is poorly studied for lack of constraining data for deep structures. In this paper, a crustal electrical structure model of the Wuwei Basin and the adjacent areas is constructed
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Carbon Isotope Stratigraphy of the Uppermost Aptian–Lower Cenomanian Strata from the Lut Block, East Iran J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Javad Sharifi, Seyed Naser Raisossadat, Maryam Mortazavi Mehrizi, Maryam Motamedalshariati
The Mid-Cretaceous interval has been recognized as a crucial period in Earth’s history, and a number of studies on Neo-Tethyan successions illustrate intense evolutions in the nature of Mid-Cretaceous ocean chemistry, sea level, and marine faunal communities. However, much less investigations have been conducted in the Sistan Ocean, in the eastern Neo-Tethys. Here, the Nimbolook Section (Lut Block
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Geochemical Characterization of Organic Rich Black Rocks of the Niutitang Formation to Reconstruct the Paleoenvironmental Settings during Early Cambrian Period from Xiangxi Area, Western Hunan, China J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Rizwan Sarwar Awan, Chenglin Liu, Ashar Khan, Khawaja Hasnain Iltaf, Qibiao Zang, Yuping Wu, Sajjad Ali, Muhammad Amar Gul
The Niutitang Formation in the South China Block might be a source of hydrocarbon as it contains an enormous quantity of organic matter. Black rock of the Early Cambrian Niutitang Formation is widely distributed in the Yangtze region, but detailed geochemical understanding of it is still emerging. This research discusses the detailed geochemical characteristics of the Niutitang Formation to reconstruct
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Exceptionally Preserved Conodont Natural Assemblages from the Middle Triassic Luoping Biota, Yunnan Province, China: Implications for Architecture of Conodont Feeding Apparatus J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Jinyuan Huang, Carlos Martínez-Pérez, Qiyue Zhang, Kexin Zhang, Mao Luo, Wen Wen, Changyong Zhou, Xiao Min, Zhixin Ma, Tao Xie, Michael J. Benton, Philip C. J. Donoghue
Articulated natural assemblages contain direct evidence of the element numbers, morphologies, positions and structures for reconstructing the feeding apparatuses of conodont animals, but these kind of materials are very rare in fossil records. Here we report ten new conodont natural assemblages from Member II of the Guanling Formation in Luoping County, eastern Yunnan Province, southwestern China.
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Quantitative Architectural Anatomy of the Meandering Fluvial Deposits of the Neogene Upper Guantao Formation in Zhanhua Sag, Bohai Bay Basin, China J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Yupeng Qiao, Longwei Qiu, Jun Wang, Fan Song, Ziyi Song, Abigail Kuttin
The residual oil in the fluvial reservoir of Gudong Oilfield is still widely developed even after decades of development. In order to explore the remaining oil in the subsurface fluvial reservoir, we need to have a better understanding on fluvial sandbody characteristics. This paper aims to demonstrate how to quantify anatomy on meandering fluvial architecture. Sedimentologic data from core descriptions
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Review on in situ Isotopic Analysis by LA-MC-ICP-MS J. Earth Sci. (IF 3.3) Pub Date : 2023-12-12 Jie Lin, Ao Yang, Ran Lin, Ji Mao, Zhaochu Hu, Yongsheng Liu
The method of LA-MC-ICP-MS has become one choice for the analysis of many isotopic systems due to its relatively low cost, high analysis speed, high spatial resolution, and low matrix effect. However, there are still many challenges in the accuracy, precision, and spatial resolution of in situ isotopic composition determination by LA-MC-ICP-MS, which mainly include: (1) how to improve instrument sensitivity
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A New Machine-Learning Extracting Approach to Construct a Knowledge Base: A Case Study on Global Stromatolites over Geological Time J. Earth Sci. (IF 3.3) Pub Date : 2023-10-18 Xiaobo Zhang, Hao Li, Qiang Liu, Zhenhua Li, Claire E. Reymond, Min Zhang, Yuangeng Huang, Hongfei Chen, Zhong-Qiang Chen
Within any scientific disciplines, a large amount of data are buried within various literature depositories and archives, making it difficult to manually extract useful information from the datum swamps. The machine-learning extraction of data therefore is necessary for the big-data-based studies. Here, we develop a new text-mining technique to reconstruct the global database of the Precambrian to
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Design and Construction of Lightweight Domain Ontology of Tectonic Geomorphology J. Earth Sci. (IF 3.3) Pub Date : 2023-10-18 Jinglun Xi, Jin Wu, Mingbo Wu
As data size grows and computing power evolves, artificial intelligence has become one of the most important tools for assisting data-intensive scientific discoveries. The development of artificial intelligence applications in geoscience requires the understanding of enormous quantities of concepts and thus requires the organization of knowledge into a structured form, which is ontology. Compared with
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Paleobiogeographic Knowledge Graph: An Ongoing Work with Fundamental Support for Future Research J. Earth Sci. (IF 3.3) Pub Date : 2023-10-18 Linna Zhang, Zhangshuai Hou, Boheng Shen, Qing Chen, Shaochun Dong, Junxuan Fan
Paleobiogeography investigates geographical distributions of fossil organisms and controlling factors that affect their distributions in geological history, to reveal the macro-evolution and coordinated development of life and the environment. It is a crucial window for understanding the biosphere and the geographical environment. After two centuries of development, paleobiogeographic studies have
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Carbonate Ontology and Its Application for Integrating Microfacies Data J. Earth Sci. (IF 3.3) Pub Date : 2023-10-18 Yiwei Xu, Xiumian Hu, Zhong Han
Carbonate rocks record essential information on changes in paleoclimate and paleoceanography. Abundant geological and geochemical data of carbonate rocks have been accumulated over the past decades; however, most of the data are stored in the published literature with highly unstructured forms, and are thus difficult to reuse. The ontology is a standard knowledge model for data integration, which can
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Nanotechnology for Water Treatment: Is It the Best Solution Now? J. Earth Sci. (IF 3.3) Pub Date : 2023-10-18 Moustafa Gamal Snousy, Hassan Mohamed Helmy, Jianhua Wu, M. F. Zawrah, A. Abouelmagd
In conclusion, the role of nanotechnology in water treatment is overestimated; while advantages are not more than theoretical assumptions, while the disadvantages are almost certain. Waste waters stay toxic after treatment by nanomaterials. The problem arises from the use of very simplified-theoretical assumptions and laboratory results produced under controlled experimental conditions. In natural
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Improving the Estimation of Salt Distribution during Evaporation in Saline Soil by HP1 Model J. Earth Sci. (IF 3.3) Pub Date : 2023-10-18 Qian Liu, Yanfeng Liu, Menggui Jin, Jinlong Zhou, P. A. Ferré
Restricted by the development of the transient flow and solute reactive transport models for unsaturated soil, empirical functions have been used previously to calculate the mass of dissolved or precipitated salt when they have to be taken into account. Besides, the solute reactive transport process has often been inferred based on measurements that cost lots of time and manpower. HP1 model coupled
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Active High-Locality Landslides in Mao County: Early Identification and Deformational Rules J. Earth Sci. (IF 3.3) Pub Date : 2023-10-18 Xianmin Wang, Jing Yin, Menghan Luo, Haifeng Ren, Jing Li, Lizhe Wang, Dongdong Li, Guojun Li
High-locality landslides are located on slopes at high elevations and are characterized by long sliding distances, large gravitational potential energy, high movement velocities, tremendous kinetic energy, and sudden onset. Thus, they often cause catastrophic damage to human lives and engineering facilities. It is of great significance to identify active high-locality landslides in their early deformational
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Knowledge Graph for Identifying Geological Disasters by Integrating Computer Vision with Ontology J. Earth Sci. (IF 3.3) Pub Date : 2023-10-18 Qinjun Qiu, Zhong Xie, Die Zhang, Kai Ma, Liufeng Tao, Yongjian Tan, Zhipeng Zhang, Baode Jiang
The occurrence of geological disasters can have a large impact on urban safety. Protecting people’s safety is the most important concern when disasters occur. Safety improvement requires a large amount of comprehensive and representative risk analysis and a large collection of information related to geological hazards, including unstructured knowledge and experience. To address the relevant information
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Calcite U-Pb Geochronology Revealing Late Ediacaran–Early Paleozoic Hydrothermal Alteration in the Stenian-Tonian Carbonate of Northeastern North China Craton J. Earth Sci. (IF 3.3) Pub Date : 2023-09-27 Rong Cao, Hanqing Zhao, Zhongwu Lan
Two calcite LA-ICP-MS U-Pb ages of 534 ± 26 Ma (MSWD = 5.9) and 456 ± 43 Ma (MSWD = 3.8) were obtained from the Nanfen Formation, Xihe Group in the southern Liaoning Province, northeastern China, which significantly postdate the theoretical depositional age of sampling horizon. This means they represent timing of post-depositional hydrothermal event possibly induced by synchronous far-field magmatism
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A Comprehensive Method for the Risk Assessment of Ground Fissures: A Case Study of the Eastern Weihe Basin J. Earth Sci. (IF 3.3) Pub Date : 2023-09-08 Zhijie Jia, Jianbing Peng, Quanzhong Lu, Penghui Ma, Jianwei Qiao, Feiyong Wang, Mingdong Zang, Yang Liu, Junyan Zhao, Fengji Zhu
Ground fissures are influenced by the coupling of geological factors and human activities. They threaten the safety of infrastructure and restrict town planning in many areas in China. One of the area most severely affected by ground fissures is the Weihe Basin in North China, which has the most extensive distribution of ground fissures and all the elements that control their occurrence, providing
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Plate Tectonics: The Stabilizer of Earth’s Habitability J. Earth Sci. (IF 3.3) Pub Date : 2023-09-04 Zhensheng Wang, Junfeng Zhang, Keqing Zong, Timothy M. Kusky, Yanxin Wang
Earth is the only planet known to be habitable, and is also unique with its liquid water, and the operation of plate tectonics. The geological record shows that the habitability of our planet can rapidly recover from major disasters or catastrophes, even those that cause mass extinctions. We suggest that plate tectonics, which acts as a link between the shallow and deep, is pivotal for the formation
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Gas-in-Place (GIP) Variation and Main Controlling Factors for the Deep Wufeng-Longmaxi Shales in the Luzhou Area of the Southern Sichuan Basin, China J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Wei Wu, Peng Cheng, Shenyang Liu, Chao Luo, Haifeng Gai, Haitao Gao, Qin Zhou, Tengfei Li, Kesu Zhong, Hui Tian
The Wufeng-Longmaxi Formation shales with burial depths > 3 500 m in the southern Sichuan Basin are believed to have large shale gas potentials. However, the reservoir properties and gas-in-place (GIP) contents of these shales exhibit variations across different sublayers. In this study, a set of Wufeng-Longmaxi shales with burial depths of 4 000–4 200 m was derived from the Well Y101H2 in the Luzhou
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In-situ Fluid Phase Variation along the Thermal Maturation Gradient in Shale Petroleum Systems and Its Impact on Well Production Performance J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Qianyou Wang, Wei Yang, Yaohua Li, Zhenxue Jiang, Ming Wen, Rusi Zuo, Xin Wang, Zixin Xue, Yaohua Wang
In-situ fluid phase behavior is important in determining hydrocarbon contents and the multiphase flow through shale reservoirs. The gas-to-oil ratio (GOR) has been recognized as a critical indicator of fluid types. However, little is known about the impact of fluid phase variation across the thermal maturity on shale oil/gas production (e.g., estimated ultimate recovery, EUR). According to the specific
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Development Strategy and Countermeasures of China’s CBM Industry under the Goal of “Carbon Peak and Neutrality” J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Fengyin Xu, Xia Yan, Fenglin Wang, Xinyuan Ma, Jian Yun, Hongna Wang, Borui Xu, Shuangyuan Zhang, Delei Mao
China’s coalbed methane (CBM) industry is in an extremely important “climbing period” and “strategic opportunity period”, which can be generally characterized by “three low and one small”: low degree of exploration and development, low adaptability of main technology, low return on investment and small development scale. Under the “carbon peak and neutrality” background, the development status of CBM
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A New Method for Converting T2 Spectrum into Pore Radius J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Fan Zhang, Zhenxue Jiang, Yuanhao Zhang, Bin Hu, Zaiquan Yang, Yuhua Yang, Xianglu Tang, Hanmin Xiao, Lin Zhu, Yunhao Han
In this paper, a new method for converting the T2 (relaxation time) of NMR (nuclear magnetic resonance) into the pore radius is proposed. Combined with NMR and centrifugation experiments, the relationship between pore radius and T2 of the sample was established. The results show that the new method is more reasonable than the traditional method. When the sample was denser and the mercury saturation
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Genetic Mechanism of Water-Rich Landslide Considering Antecedent Rainfalls: A Case Study of Pingyikou Landslide in Three Gorges Reservoir Area J. Earth Sci. (IF 3.3) Pub Date : 2023-08-10 Defu Tong, Aijun Su, Fei Tan, Jiandong Tang, Xiongwei Yi
Water-rich slope, which could easily fail after prolonged or heavy rain, is very sensitive to rainfall. Pingyikou Landslide is a typical water-rich slope located in the Three Gorges Reservoir area of China. It was unstable because of the continuous rainfall that occurred from September to October 2017. To understand the deformation process and genetic mechanism of the landslide, the geomorphological
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Assessing the Connectivity of a Regional Fractured Aquifer Based on a Hydraulic Conductivity Field Reversed by Multi-Well Pumping Tests and Numerical Groundwater Flow Modeling J. Earth Sci. (IF 3.3) Pub Date : 2023-08-10 Jingjing Lin, Rui Ma, Ziyong Sun, Liansong Tang
Aquifer connectivity could greatly affect groundwater flow and further control the contaminant transport in fractured medium. However, assessing connectivity of fractured aquifer at regional scales is still a challenge because such connectivity is difficult to be measured directly. This study proposes a framework for assessing connectivity of a fractured aquifer, with Qitaihe area, Heilongjiang Province
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Compression Characteristic and Creep Behavior of Moraine Soil at Xingkang Bridge, West Sichuan, China J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Xifeng Guo, Xinfu Xing, Zhonghao Wang, Qiang Cheng, Lei Huang, Ning Li, Shengming Hu
The compression and creep characteristics of moraine soil are important mechanical properties of geomaterials to be analyzed during the construction process of engineering projects. However, related references about these characteristics through large-size in-situ tests have rarely been reported. In this study, in-situ tests of particle size distribution, compression deformation, and compression creep
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Neoproterozoic Diamictite of the Luoquan Formation from the North China Block and Their Implications J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Peishan Sui, Weidong Sun, Nan Han, Lei Wang, Shiwen Xie, Zihang Huang, Xiaohong Wang, Hongmei Gong, Jin Liu, Jinyan Lin, Yuanyuan Xiao
Glacial diamictite may provide important information on paleoenvironment and average composition of the upper continental crust (UCC). In this study, we report sedimentary facies, petrological and geochemical characteristics of Neoproterozoic diamictite from a profile of the Luoquan Formation on the southern margin of the North China Block (NCB). Upwards the sampling profile, lithostratigraphic strata
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Geological Genesis of Alkaline Magnesium-Type Groundwater within the Ophiolitic Rocks Areas in Southwestern Turkey J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Selma Demer
The groundwaters within the ophiolite nappes in the southwestern part of Turkey have different physical and geochemical characteristics and are divided into five different groundwater facies. These are (1) Mg-HCO3, (2) Mg-HCO3-CO3, (3) Mg-CO3-HCO3, (4) Na-Ca-Cl-CO3, and (5) Ca-Mg-HCO3. The waters interact with ophiolites, mainly made up of basic-ultrabasic rocks, are characterized by alkaline and hyperalkaline
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U-Pb Zircon Ages and Geochemistry of the Metasedimentary Rocks from the Foping Area in the South Qinling Belt: Evidence for Early Devonian Amalgamation between North China and South China Blocks J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Ruiying Zhang, Wenhao Ao, Yan Zhao
The provenance and tectonic implications of Late Paleozoic sedimentary rocks in the South Qinling Belt (SQB) provide important clues for understanding the timing and mechanism of the collision between North China Block (NCB) and South China Block (SCB). Here we report new LA-ICP-MS zircon U−Pb ages and geochemical composition of metasedimentary rocks from the Foping area in the SQB. The results indicate
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Pyrite Concretions in the Lower Cambrian Niutitang Formation, South China: Response to Hydrothermal Activity J. Earth Sci. (IF 3.3) Pub Date : 2023-08-11 Zixuan Liu, Detian Yan, Xing Niu
The Early Cambrian Niutitang Formation is characterized by wide distribution of black shales on Yangtze Block, South China. Here we have reported the pyrite concretions in the bottom of the Niutitang Formation deposited in the slope-basin environment of Yangtze Block. The pyrite concretion was mainly composed of pyrite associated with hydrothermal minerals (barite, hyalophane, tetrahedrite), followed
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Low Temperature Thermal History Reconstruction Based on Apatite Fission-Track Length Distribution and Apatite U-Th/He Age Using Low-T Thermo J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Ruxin Ding
Low temperature thermochronology plays a key role in the study of the tectonic evolution of the upper crust. History modeling of apatite fission-track requires the apparent age and the confined track-length distribution of spontaneous tracks. Obtaining length data does not require either thermal neutron irradiation or LA-ICP-MS measurements of the uranium content of the grains. This paper attempts
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Micro-Earthquake Seismicity and Tectonic Significance of the 2012 Ms 4.9 Baoying Earthquake, Jiangsu, China J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Yanzhen Li, Hongyi Li, Yafen Huang, Shengzhong Zhang, Yuejun Lü
On July 20, 2012, the Ms 4.9 Baoying Earthquake occurred near the junction of Baoying County and Gaoyou City in Jiangsu Province, eastern China. Due to no obvious surface rupture and limited observation of earthquake sequence, the seismogenic structure of the Ms 4.9 Baoying Earthquake is still unclear. In this study, 80 earthquakes provided by China Earthquake Network Center (CENC) are first relocated;
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Exhumation History and Exploration Potential of Gold Deposits in the NE Jiaodong Peninsula, North China: Evidence from Apatite and Zircon Fission Track Thermochronology J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Yuanlin Chen, Huan Li, Chaoyang Zheng, Safiyanu Muhammad Elatikpo, Liu’an Duan, Bo Feng, Dadou Li, Rehan Khan
As the most important gold producer in China, the Northwest Jiaodong Peninsula is famous for its large gold deposits. In recent years, the discovery of gold mineralization has reached a depth of 4 000 m below the surface in this region. It has attracted significant interest from explorers about the prospecting potential at greater depths. Besides, the current deep drilling shows that the prospecting
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Multiple Episodes of Zircon Growth during Anatectic Metamorphism of Metasedimentary Rocks in Collisional Orogens: Constraints from Felsic Granulites in the Bohemian Massif J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Guang Yang, Ren-Xu Chen, Yong-Fei Zheng, Qiong-Xia Xia, Yong-Jie Yu, Kun Li, Zhaochu Hu, Bing Gong, Xiang-Ping Zha
Zircon is a key accessary mineral for metamorphic geochronology and geochemical tracing, but it has been a challenge to interpret its complex chemical zoning and age record acquired during multiple episodes of anatectic metamorphism in collisional orogens. This is illustrated by a combined study of petrography, phase equilibrium modeling and metamorphic P-T-t determination for granulites from the Bohemian
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Early Cretaceous Tectonostratigraphic Evolution of the Southern Tunisian Margin Based on Gravity, Seismic and Potential Field Data: New Insights into a Geodynamic Evolution in a Tethyan and Mesogean Rifting Context J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Mohamed Ben Chelbi
Many geophysical and geological data have been used to interpret the tectonic evolution of the south-eastern part of the Tunisian margin and to analyze the dominant structures in the area. The Menzel Habib Plain (MHP) and surroundings, targeted by this study, exhibits thick siliciclastic and carbonate formations attributed to the Early Cretaceous period. Integration of seismic and gravimetric data
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Plumbing System of Hunga Tonga Hunga Ha’apai Volcano J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Román Alvarez, Miguel Camacho
The Hunga Tonga Hunga Ha’apai submarine volcano has experienced repeated eruptions in the latest decades. The recent one, in January 2022, released an enormous amount of energy inducing global perturbations, as tsunamis and atmospheric waves. The structure of the volcano is poorly understood, especially its internal structure. Deep-seated magmatic connections are difficult to define or visualize. We
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Devonian–Carboniferous Pillow OIB-Type Basalts in the Youjiang Basin, SW China: Implications for the Eastern Extension of the Paleo-Tethys Branch Ocean J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Jie Yang, Yuansheng Du, Hu Huang, Jianghai Yang, Hongwei Huang, Zhiqiang Huang
Late Paleozoic pillow basalts are well preserved in the Youjiang Basin of SW China. In this study, we conducted geochemical and Sr−Nd isotopic study on the Late Devonian and Late Carboniferous basalts in Napo area, Youjiang Basin. The analyzed samples comprise moderate SiO2, TiO2, Mg#, and REE contents, with slightly positive or negative Eu anomalies, similar to the chemical nature of OIB (Oceanic
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Multistage Formation of Neoarchean Potassic Meta-Granites and Evidence for Crustal Growth on the North Margin of the North China Craton J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Xiaowei Zhang, Huafeng Zhang, Ying Tong
The North China Craton (NCC) is one of the most complex cratons in the world. It underwent a series of tectonothermal events during the Neoarchean–Paleoproterozoic. The petrogenesis of potassic granitoids, the timing, and the style of Archean crustal growth are still debated. Systematic field and petrological stdudies on the potassic meta-granites from the Guyang-Chayouzhongqi region were carried out
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Metamorphic Evolution of Garnet Amphibolite from the Yaganbuyang Area in the South Altyn Orogen, West China: Insights from Phase Equilibria Modeling and Geochronology J. Earth Sci. (IF 3.3) Pub Date : 2023-06-22 Xin Li, Liang Liu, Xiaoying Liao, Yongsheng Gai, Tuo Ma, Guojian Geng, Tong Li
Garnet amphibolite is one of the common metabasic rocks exposed in collisional orogenic belt, the metamorphic evolution of which is associated closely with orogenic processes. The Yaganbuyang garnet amphibolites occur as blocks hosted by massive granitic gneiss, and consist mainly of hornblende, garnet, clinopyroxene, plagioclase, biotite, quartz with minor rutile/ilmenite and phengitic muscovite.
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Investigation of Organic Matter Sources and Depositional Environment Changes for Terrestrial Shale Succession from the Yuka Depression: Implications from Organic Geochemistry and Petrological Analyses J. Earth Sci. (IF 3.3) Pub Date : 2023-06-15 Shiming Liu, Lian Jiang, Bangjun Liu, Cunliang Zhao, Shuheng Tang, Furong Tan
Continental organic-rich shales are well developed in the Dameigou Formation within the Yuka Depression of the Qaidam Basin. Here, the Rock-Eval pyrolysis, biomarkers, organic petrology, and stable carbon isotope have been carried out on the Middle Jurassic Dameigou Formation source rocks from the northwest part of Yuka Depression, Qaidam Basin in order to study their thermal maturity, source of organic
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Analysis of the Sedimentary Characteristics of a Modern Distributive Fluvial System: A Case Study of the Great Halten River in the Sugan Lake Basin, Qinghai, China J. Earth Sci. (IF 3.3) Pub Date : 2023-06-15 Xianghui Zhang, Changmin Zhang, Adrian Hartley, Qinghai Xu, Wenjie Feng, Taiju Yin, Rui Zhu
Understanding controls on river planform changes can help to build predictive models for distributive fluvial systems, and then guide the oil and gas exploration. To do this we have undertaken a detailed investigation of the modern Great Halten River distributive fluvial system from the Sugan Lake Basin, Qinghai, China. Unmanned aerial vehicle (UAV) photography, satellite remote sensing data and elemental
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Climatic Fluctuation of Marine Isotope Stage 9: A Case Study in the Southern Margin of the Chinese Loess Plateau J. Earth Sci. (IF 3.3) Pub Date : 2023-06-15 Tieniu Wu, Antai Cheng, Henry Lin, Hailin Zhang, Yi Jie
Marine Isotope Stages (MIS) 9 has been proposed as an analog for the present warm period. However, detailed studies of this geological time period are rare in loess-paleosol sequence. In the Chinese Loess Plateau (CLP), the corresponding stratum is the third paleosol layer (S3). Here, we report the terrestrial reconstruction of climatic fluctuations during MIS 9 by analyzing the paleo-climate indexes
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Different Burial-Cooling History of Triassic Strata between the Western Weibei Uplift and the Northwestern Weihe Basin in Northwest China J. Earth Sci. (IF 3.3) Pub Date : 2023-05-13 Qiang Yu, Zhanli Ren, Rongxi Li, Chung Ling, Tao Ni, Wanshan Lei, Baojiang Wang, Xiaoli Wu, Xiaoli Qin, Xianghe Lei
Analysis of tectonothermal history of the Yanchang Formation in the western Weibei Uplift and in the northwestern Weihe Basin can reconstruct the cooling history of the southwest most remained Upper Triassic source rock of the North China Plate. Apatite fission-track (AFT) and (U-Th-Sm)/He (AHe) analysis were used to recover the cooling and uplift history of the Upper Triassic here. Ten sandstones