Article
Geology
Jing Chen, Bing-Zhang Wang, Bin Li, Fu-Cheng Yu
Summary: This study analyzes the Silurian volcanic rocks in the Wanbaogou area of the southern Kunlun Orogen to reveal the tectonic setting of this region during the middle to late Silurian. The volcanic rocks are divided into trachytic and basaltic groups, formed during the middle to late Silurian. The basalts show characteristics of within-plate volcanic rocks with high Nb/La ratios, while the trachytes likely formed through the melting of young basaltic crust. These findings are significant for understanding the tectonic evolution of the middle-late Silurian in the Kunlun Orogen.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Jing Li, Hu Li, Cheng Yang, Yijia Wu, Zhi Gao, Songlian Jiang
Summary: This study comprehensively analysed the sedimentary environment and exploration potential of the Lower Paleozoic marine shale in the Sichuan Basin. The study examined factors such as sedimentary environment changes, favourable conditions for hydrocarbon generation and preservation, and the impact of tectonic processes on shale gas accumulation.
Article
Geology
Panlao Zhao, Xu Chu, Anthony E. Williams-Jones, Jingwen Mao, Shunda Yuan
Summary: Most tungsten and tin mineralization are separated in space and time. Tin-related granites are generally formed through high-temperature partial melting, while tungsten-related granites are formed through low-temperature partial melting. The segregation may be influenced by the protolith, melting temperature, and magma evolution.
Article
Geochemistry & Geophysics
Xuming Zhou, Sheng Wang, Xuelong Li, Jingjing Meng, Zhen Li, Linhan Zhang, Dongdong Pu, Longkang Wang
Summary: This paper conducts a detailed analysis and simulation study on the problem of floor heave in mine roadways of Longhu coal mine. A mechanical model and a supported roadway model are established, three support optimization schemes are proposed, and the best scheme is determined, providing important reference and guidance for solving the problem of floor heave in mine roadways.
Article
Geology
Hua Xiang, James A. D. Connolly
Summary: GeoPS is a program that enables the calculation of stable phase relations throughout the mantle and crust of terrestrial planets, with a wide range of phase equilibrium calculations and an intuitive graphical user interface. The novel Gibbs energy minimization algorithm in GeoPS provides robust and efficient solution to the phase equilibrium problem.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Hanlie Cheng, Jianfei Wei, Zhaoyuan Cheng
Summary: This paper analyzes and studies the sedimentary and reservoir characteristics of the Paleogene bottom sandstone in Block Yingmai 7 through laboratory core analysis. The study reveals that the reservoir is a braided river delta sedimentary system with favorable reservoir properties. The research results provide important evidence for the prediction of oil and gas reservoirs in Block Yingmai 7.
Article
Geochemistry & Geophysics
Xiaoshuang Li, Qihang Li, Yunjin Hu, Qiusong Chen, Jun Peng, Yulin Xie, Jiawen Wang
Summary: The study systematically investigated the dynamic stability of adjacent high slopes after blasting vibration at the Jianshan Phosphorus Mine, utilizing engineering geological investigation, field blasting test, blasting vibration monitoring, numerical simulation technology, and theoretical analysis. The study proposed a small-diameter buffer shock-absorbing blasting technology near the slope, which improved production efficiency. The study obtained the law of blasting vibration propagation and studied the dynamic response characteristics of the slope. The results showed that the high slope near the Jianshan Phosphorus Mine was generally in a stable state.
Article
Geochemistry & Geophysics
Cunhui Fan, Hubin Xie, Hu Li, Shengxian Zhao, Xiangchao Shi, Jianfeng Liu, Lifeng Meng, Jun Hu, Chengbo Lian
Summary: The southern margin of the Sichuan Basin is characterized by strong structural deformation, complex fault structure styles and scales, and multistaged geological evolution stages, which together have created various shale gas preservation conditions.
Article
Geochemistry & Geophysics
Yanhui Guo, Yi Yang, Zhijun Kong, Jin He
Summary: This study develops fault similar materials and surrounding similar rock materials based on the fluid-solid coupling similarity theory. Through testing and analysis, the influence of red clay content and gravel substrate on the mechanical and hydraulic properties of the materials is revealed.
Article
Geology
V. Paul Wright
Summary: During the Aptian (Cretaceous) period, a vast hyper-alkaline lake system developed in what is now the South Atlantic, forming the largest chemogenic carbonate factory in the Phanerozoic geological record. Current evidence suggests that almost all of the carbonate in this system was chemically precipitated from hyper-alkaline, shallow lake waters, possibly through evaporation. The carbonate components are mainly crystal shrubs and spherulites, associated with Mg silicates (clays) that significantly influenced their texture and diagenesis. The source of the carbonate was likely from alteration of mafic rocks and older continental basement. The dissolution of clays contributed to the porosity of these carbonates, hosting multi-billion barrel oil fields.
Article
Geochemistry & Geophysics
Chaojun Fan, Haiou Wen, Sheng Li, Gang Bai, Lijun Zhou
Summary: Due to the exhaustion of shallow coal resources, deep mining has been carried out in coal mines. Gas extraction technology can reduce coal seam gas pressure and gas content, helping to prevent gas disasters and ensuring the security of coal mines.
Article
Geology
Zhi-He Xu, Wei Xin, Xiao-Dong Zhou, Qing-Lin Xu, Fu-Wen Li, Zhao-Jun Song
Summary: Granitoids are important evidence of the accretion and reworking process of the continental crust. By analyzing their geochemical characteristics, the early geodynamic mechanisms can be reconstructed. This study focused on the Permian-Triassic Granitoids in the East Kunlun Orogenic Belt and determined their chronology and petrogenesis, shedding light on their source regions and the significance of their geodynamic and crustal growth.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Guangjin Wang, Bing Zhao, Bisheng Wu, Menglai Wang, Wenlian Liu, Hanmin Zhou, Chao Zhang, Yishu Wang, Yabing Han
Summary: The shape of tailing particles is crucial for their macroscopic mechanical properties. This study investigates the macro-mesoscopic response of heteromorphic tailing particles using multisphere approximation and numerical simulation. The research reveals the relationship between mesostructure evolution and macroscopic engineering characteristics of heteromorphic tailing particles. The results show that changes in angularity affect particle rearrangements, porosity, and stress characteristics. The study also suggests that rigid boundary simulations are feasible for macroscopic mechanical behaviors. These findings provide important insights into the response and mechanical mechanisms of nonspherical particles and can be applied in microscopic simulations of tailings.
Article
Geochemistry & Geophysics
Guangjin Wang, Bing Zhao, Rong Lan, Dianwen Liu, Bisheng Wu, Yaoji Li, Quanming Li, Hanmin Zhou, Mingsheng Liu, Wenlian Liu, Xinjie Liu
Summary: Unusual rainfall is the main cause of tailing dam failure. In this study, the process of breach extension and the overtopping dam-failure mechanism of an upstream tailing dam under full-scale rainfall conditions were investigated. The results showed that the height of the infiltration line at different positions of the dam body varied with the rainfall duration. The process of overtopping dam-failure involved gully erosion, formation of a multistepped small scarp, breach rapid expansion, formation of large scarp, and burst. The width and depth of the breach were positively correlated, with the widening rate being higher than the deepening rate.
Article
Geochemistry & Geophysics
Xixin Wang, Xinrui Zhou, Shaohua Li, Naidan Zhang, Ling Ji, Hang Lu
Summary: The study found that the active Kongdong growth fault produces strong seismic pumping action, leading to the formation of secondary faults in adjacent strata, which impact hydrocarbon distribution. It is believed that the pumping force caused by the growth fault influences the dominant distribution of hydrocarbons in the active parts of the faults and vertically located reservoirs.
Article
Geology
Gita R. Narayan, Claire E. Reymond, Marleen Stuhr, Steve Doo, Christiane Schmidt, Thomas Mann, Hildegard Westphal
Summary: Large benthic foraminifera play significant roles in tropical coral reef environments, serving as important carbonate producers and indicators of environmental change. Their calcareous tests contribute to sediment supply after the organisms die, maintaining shoreline stability. Studies suggest these organisms may exhibit increased tolerance to a wide range of conditions, but more research is needed to fully understand their response to changing ocean conditions and climate regimes.
Article
Geochemistry & Geophysics
Xiaoshuang Li, Jun Peng, Yulin Xie, Qihang Li, Tao Zhou, Jiawen Wang, Wenbo Zheng
Summary: This paper studied the effect of high temperature on the mechanical properties of quartz-rich sandstone through true triaxial pressure experiments. It was found that the properties of the sandstone, including color, brittleness, and ductility, significantly changed when heated to 500 degrees Celsius. The density, P-wave velocity, and elastic modulus showed a decreasing trend, while the peak stress and peak strain exhibited an overall upward trend with the increase in temperature.
Article
Geochemistry & Geophysics
Qiang Li, Dan Ma, Yandong Zhang, Yong Liu, Yingjian Ma
Summary: The study revealed that the pore structure and hydraulic properties of the broken rock mass are significantly influenced by pressure, including compressibility and stress sensitivity. The seepage pores can be characterized by fractal theory, and show a positive correlation with compressive stress.
Article
Geology
N. K. Libeesh, K. A. Naseer, S. Arivazhagan, A. F. Abd El-Rehim, Ghada ALMisned, H. O. Tekin
Summary: The Pakkanadu Ultramafic-Alkaline-Carbonatite complex in Salem district has been studied using geochemical and remote sensing methods. The study found that the dunite sample, with the highest Fe2O3 content, exhibited superior shielding properties. This suggests that the composition and density of the studied materials directly impact their properties, and that the superior shielding properties of dunite are worth investigating for other radiation types.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Giovanna Della Porta, Michael Hoppert, Christine Hallmann, Dominik Schneider, Joachim Reitner
Summary: The study investigated three active hydrothermal travertine sites in Central Italy to characterize carbonate precipitates and associated microbial mats under varying physico-chemical parameters. It was found that the type of carbonate precipitates and microbial mat composition varied with decreasing water temperature, indicating a complex interaction between physico-chemical processes and microbial communities in carbonate precipitation.
DEPOSITIONAL RECORD
(2022)
