Article
Geosciences, Multidisciplinary
Toru Yamasaki, Takayuki Uchino
Summary: The close spatial association and compositional similarity between bajaites and adakites suggest a possible genetic relationship between these rock types.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Lipeng Zhang, Yongbin Hu, Jianghong Deng, Jinrong Wang, Kun Wang, Qinglin Sui, Yuxiao Chen, Kai Wu, Weidong Sun
Summary: The study focuses on large-scale Late Cretaceous magmatic intrusions in the southern Gangdese magmatic belt, presenting new insights into their genesis and mineralization potential. The Chemen granodioritic intrusion, with a similar U-Pb age to other Late Cretaceous intrusions in the region, exhibits geochemical characteristics resembling adakites. High oxygen fugacity during crystallization is indicated by Ce4+/Ce3+ ratios in zircon and SO3 contents of apatite in the Chemen intrusion. Although the Chemen intrusion shows great mineralization potential, some Late Cretaceous intrusions in the region have low oxygen fugacity, limiting mineralization extent.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geology
Scott A. Whattam
Summary: This study investigates BONs, HMAs, and related lavas and dikes in the Palaeogene ophiolites of the SW Pacific to determine their similarities to other second-stage lavas and dikes in the Pacific and IBM forearc. It is found that the second-stage lavas and dikes in the SW Pacific are mostly high-Si BONs, with HMAs appearing to precede the formation of BONs. The melting process is believed to be a result of flux-melting of a depleted source with the addition of sediment melts enriched in hydrous, LREE, Sr, and Zr. Thermobarometry calculations show that the temperatures and pressures of these lavas and dikes are generally lower than MORB, with a clear distinction between BONs and HMAs in New Caledonia and Papua New Guinea.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geology
Chenwei Li, Min Zeng, Zhijun Li, Si Chen
Summary: The high-Mg diorites in the Shiquanhe-Num Co ophiolitic melange belt formed in the Late Jurassic period with geochemical characteristics similar to sanukites of the Setouchi volcanic rock belt in southwest Japan. These diorites were likely derived from partial melting of mantle peridotite due to interaction with hydrous melts of subducted sediments during the early evolution of the northward subduction of the Bangong-Nujiang Tethys ocean beneath the Qiangtang terrane.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geochemistry & Geophysics
Qian-Ru Xiao, Yong-Feng Wei, Zhong-Yuan Liu, Fu-Hao Xiong, Lei Fan, Jian-Xin Wu, Han Zhao
Summary: Late Mesozoic igneous rocks from the north Lhasa block in the southern Tibet Plateau are studied to understand their petrogenesis and tectonic implications. The results indicate that the quartz diorites in the area were emplaced around 114-116 Ma during the Early Cretaceous. The geochemical data suggests that these rocks are meta-aluminous, high-potassium calc-alkaline, and have characteristics of adakitic rocks. The study emphasizes the importance of partial melting of delaminated lower crust as the main mechanism for the adakitic magmatism in the area.
Article
Geology
Hong Liu, Hanxiao Huang, Guangming Li, Wenchang Li, Linkui Zhang, Shuangshuang Lan, Menghong Lue, Wenjie Song
Summary: Due to the difference of lithospheric structure, it is believed that porphyry copper deposits are mainly developed in the eastern segment of Gangdese metal-logenic belt. However, the newly discovered Luerma porphyry copper deposit in the western segment provides evidence of Late Triassic mineralization events. The Luerma porphyry has specific geochemical characteristics and is likely formed through partial melting of juvenile crust during the subduction of the NeoTethys Ocean. This deposit is the oldest and westernmost porphyry deposit in the Gangdese belt, indicating the beginning of porphyry copper mineralization in the Late Triassic.
ORE GEOLOGY REVIEWS
(2023)
Editorial Material
Geochemistry & Geophysics
Songnan Liu, Liyun Zhou, Yu Wang
Summary: The petrogenesis and tectonic settings of adakite and adakitic rocks are debated. This article discusses the petrogenetic processes and possible tectonic setting of adakite in the southern Beishan region of the Central Asian Orogenic Belt (CAOB), emphasizing the importance of geochemical data in discriminating the tectonic setting of adakite formation. Based on field observations, the authors disagree with previous models and suggest that the adakitic rocks in Beishan are generated in an extensional setting.
Article
Geology
Y. Rojas-Agramonte, H. Y. Hu, M. Iturralde-Vinent, J. Lewis, B. Mercier de Lepinay, A. Garcia-Casco
Summary: This study presents new U-Pb zircon age and geochemical data from an intermediate talc-alkaline pluton in NW Hispaniola, shedding light on the Late Cretaceous development and geological evolution of the Greater Antilles Arc. The data suggest a connection between rocks with adakitic affinities in Eastern Cuba, Haiti, and Dominican Republic, and reveal potential ridge subduction and triple point migration during the Late Cretaceous to early Tertiary period.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Multidisciplinary Sciences
Ming Tang, Xuanyu Liu, Kang Chen
Summary: A new hypothesis suggests that the high Mg/Fe ratio of the continental crust is linked to magma differentiation beneath high mountains. Research using geochemical data shows that andesites from mature continental arcs with thick crusts have higher Mg# than those from oceanic arcs with thin crusts. This is due to Fe depletion during high-pressure differentiation in thick crusts. Melting/crystallization experiments further support this hypothesis, showing that the Mg# characteristics of continental arc lavas match that of the continental crust. These findings suggest that the high Mg# of the continental crust can be explained by intracrustal calc-alkaline differentiation processes in magmatic orogens.
NATIONAL SCIENCE REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Guoshun Zheng, Jiangfeng Qin, Shaocong Lai, Xiaoping Long, Yinjuan Ju, Zezhong Zhang, Hongbing Zhang
Summary: This study reports the geochemical characteristics and formation mechanism of a Late-Triassic high-Mg andesite in the southern part of the Zhangguangcai Range. The results suggest that the high-Mg andesite was formed by hydrous melting of the mantle wedge, which was metasomatized by slab-derived adakitic melts and assimilated ancient crust.
GEOLOGICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Zhongjin Xiang, Jinhui Yang, Quanren Yan, Lei Xia, Wenjing Xia, James D. L. White
Summary: The study investigates the source, petrogenesis, and tectonic setting of volcanic rocks in the Funing area of southwestern China, suggesting that these rocks were derived from partial melting of a refractory lithospheric mantle and not mantle plume-related melting.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Mingjuan Liang, Tiannan Yang, Zhen Yan, Chuandong Xue, Di Xin, Shaofeng Qi, Mengmeng Dong, Wei Wang, Pengliang Shi, Kun Xiang, Xue Han, Jingkun Bao
Summary: Syn-subduction basins are important for understanding the tectonic evolution of fossil subduction zones. The Sanjiang Orogenic Belt in the eastern and southeastern Tibetan Plateau is characterized by ocean-continent subduction systems. A large pile of volcanic-absent sedimentary succession in this belt has been studied, and the results show that it was formed in a non-volcanic retro-foreland basin during the early Late Triassic.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geology
Xin Wei, Xin Jin, Yu-Xiu Zhang, Li-Long Yan
Summary: This study used phase equilibrium modeling to calculate the peak metamorphic conditions of Baqing eclogite to be 26.5 +/- 1 kbar and 730 +/- 60 degrees C, which confirms the previous calculation results. The eclogites of Baqing, Central Qiangtang metamorphic belt, and Changning-Menglian metamorphic belt show similar P-T paths, indicating similar heating and burial processes during Triassic subduction of the Shuanghu Paleo-Tethyan oceanic plate.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Yao Zhong, Wen-Guang Yang, Li-Dong Zhu, Long Xie, Yuan-Jun Mai, Nan Li, Yu Zhou, Hong-Liang Zhang, Xia Tong, Wei-Na Feng
Summary: This article presents new data on the Early Cretaceous quartz diorite dykes in Liuqiong, Gongga, which have adakite affinity. The study reveals that the adakite magma was derived from partial melting of the Neo-Tethyan oceanic plate, with subsequent interaction with the overlying mantle wedge. These findings provide insights into the subduction model of the Neo-Tethys during the Early Cretaceous.
GEOLOGICAL MAGAZINE
(2022)
Article
Geosciences, Multidisciplinary
Xu Dai, Arnaud Brayard, David Ware, Shouyi Jiang, Mingtao Li, Fengyu Wang, Xiaokang Liu, Haijun Song
Summary: A high-resolution biostratigraphy of Early Triassic ammonoids was established using fossil data from four sections in South Tibet. Global correlations for ammonoid biostratigraphy in the Griesbachian, Dienerian, and Smithian were revised based on the newly obtained data. The ammonoid zones also provide a reliable and accurate time calibration for Early Triassic carbon isotope trends and temperature changes.
EARTH-SCIENCE REVIEWS
(2023)
Article
Mechanics
Xinying Zhu, Wei Chen, Lulu Liu, Kailong Xu, Gang Luo, Zhenhua Zhao
Summary: This paper investigates the impact resistance and damage tolerance of 2D triaxially braided composites and 3D angle-interlock woven composites panels using high-velocity impact tests and compression after impact tests. Both materials show similar impact resistance but different damage patterns. X-ray CT scanning reveals the spatial variation in damage morphology caused by high-velocity impact.
COMPOSITE STRUCTURES
(2023)
Article
Geosciences, Multidisciplinary
Zheng-Xiang Li, Yebo Liu, Richard Ernst
Summary: Understanding how tectonic plates have moved since deep time is crucial for comprehending the evolution and functioning of Earth's geodynamic system, as well as answering fundamental questions about plate tectonics. This knowledge has significant implications for various fields, including core-mantle-crust interaction, mountain building, and the formation of Earth resources, as well as global sea-level changes, climatic evolution, atmospheric oxygenation, and the evolution of life.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geology
Lin Ma, Qiang Wang, Andrew C. Kerr, Zheng-Xiang Li, Wei Dan, Ya-Nan Yang, Jin-Sheng Zhou, Jun Wang, Cheng Li
Summary: Eocene mafic magmatism in the Himalaya is important for understanding crustal anatexis processes within collisional orogens. Geochemical data from mafic dikes intruding the Tethyan Himalaya indicate interaction between lithospheric and asthenospheric melts. These magmas were emplaced along lithospheric fractures during initial subduction, resulting in orogen-parallel crustal anatexis.
Article
Geochemistry & Geophysics
Yue Qi, Qiang Wang, Gang-Jian Wei, Derek A. Wyman, Xiu-Zheng Zhang, Wei Dan, Le Zhang, Ya-Nan Yang
Summary: The formation of post-collisional mantle-derived rocks in the Tibetan Plateau, particularly in the northern Qiangtang Terrane, has been studied. The origins of silica-undersaturated magmas and the mechanisms responsible for variable silica activity in these rocks have been investigated. The analysis of the Bamaoqiongzong volcanic rocks provides insights into the formation processes, indicating partial melting of carbonated phlogopite-lherzolite. Fractional crystallization and magma mixing in a magmatic plumbing system played a role in the formation of the olivine leucitites-trachybasalts-phonolites suite.
JOURNAL OF PETROLOGY
(2023)
Article
Multidisciplinary Sciences
Chuan Huang, Zheng-Xiang Li
Summary: Periodic assembly and break-up of supercontinents called the supercontinent cycle, which has been going on for at least two billion years, plays a significant role in the evolution of the Earth System. The decreasing lifespan of supercontinents over time is attributed to the yield stress of newly formed orogens during the assembly of a supercontinent. It is hypothesized that the decreasing mantle temperature due to Earth's secular cooling might be the cause of weaker orogens.
Article
Chemistry, Multidisciplinary
Yan-Chen Liu, Jia-Run Huang, Zhen-Hua Zhao, Pei-Qin Liao, Xiao-Ming Chen
Summary: A stable metal-azolate framework with cyclic trinickel(II) clusters achieved a high current density of 50 mA cm(-2) at a cell voltage of 1.8V in a 1.0 M KOH solution. The framework showed no obvious degradation over 12 hours of continuous operation at a large current density. Theoretical calculations revealed that the unique structure of the framework facilitated the dissociation of H2O molecules and provided a low-energy coupling pathway for water oxidation, resulting in high performance for overall water splitting.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Geochemistry & Geophysics
Tsai-Wei Chen, Mei-Fei Chu, Wen-Shan Chen, Sun-Lin Chung, Hao-Yang Lee, Yoshiyuki Iizuka
Summary: This study investigates the evolution of the Taiwan orogen by analyzing arc volcanic and sedimentary rocks in the Taiyuan retro-foredeep basin. The results show that volcanism in the northern North Luzon Arc (NLA) peaked at 9-7 Ma and ceased at 5.3-4.3 Ma, while eruptions associated with the Lutao volcano in the southern NLA occurred at 1.74, 1.58, and <1.2 Ma. The sediments in the Taiyuan Basin mainly originated from the Yuli Belt, and the deposition rate suddenly increased at ~2 Ma, indicating asymmetric and rapid uplift of the Taiwan orogen.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Engineering, Mechanical
Liang Wang, Pengpeng Yu, Shiyu Zhang, Zhenhua Zhao, Jiamei Jin
Summary: In this study, an electromechanical step-reduction method for piezoelectric composite beams (VPCBs) is proposed to address the limitation of traditional methods in transferring electrical information and depicting electromechanical coupling behaviors. The effectiveness and applicability of the proposed method are demonstrated through experimental verification and calculation results.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Lusheng Yuan, Liang Wang, Zhenhua Zhao, Jiamei Jin, Rui Qi
Summary: A novel inertial piezoelectric actuator with double-stator cooperative motion is proposed, designed, fabricated, and tested to achieve high performance and suppress the backward motion. The structure and operation principle of the actuator are explained in detail, and the flexible structure is analyzed through finite element simulation. A dynamic model of the actuator with double-stator working mode is established and simulated, providing guidance for design and optimization. Experimental investigation shows significant improvement in performance compared to previous double-stator inertial piezoelectric actuators, with a maximum speed of 32.84 mm/s, maximum lateral load of 20 N, maximum vertical load of 200 N, minimum backward rate of 0.91%, and minimum resolution of 127.5 nm. The actuator presents a reference for future high-performance piezoelectric actuator design.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2023)
Article
Geochemistry & Geophysics
Xiao Ran Zhang, Sun-Lin Chung, Azman A. Ghani, Rezal Rahmat, Yi-Ju Hsin, Hao-Yang Lee, Ping-Ping Liu, Jinyu Xi
Summary: By analyzing Borneo and its surrounding areas, researchers have found that the crust of Borneo shares similarities with northern Australia, suggesting a common origin and the splitting of Borneo from northern Australia. Recent investigations have challenged the current understanding of Gondwana dispersion and Asian accretion, shedding new light on Asian climate change and biogeographic diversity.
Article
Geochemistry & Geophysics
A. Krishnakanta Singh, Naveen Kumar, Sun-Lin Chung, Hao-Yang Lee, M. Santosh, Radhika Sharma, Naresh Kumar, R. K. Bikramaditya, Govind Oinam, Nongmaithem Lakhan
Summary: This study presents new zircon U-Pb ages for felsic volcano-plutonic rocks from the Tusham Ring Complex (TRC), which suggests that the intrusive and extrusive rocks are coeval. Geochemical analysis indicates that partial melting, fractional crystallization, and crustal contamination played a significant role in the magmatic evolution of these rocks. These findings support the model of anorogenic magmatism linked with the breakup of the Neoproterozoic Rodinia supercontinent.
Article
Astronomy & Astrophysics
Li-Ming Zheng, Zhengxiang Li, Zu-Cheng Chen, Huan Zhou, Zong-Hong Zhu
Summary: This study reconstructs the power spectrum of primordial curvature perturbation from GWTC-3, taking into account measurement uncertainties and selection effects. The results suggest that the maximum amplitude of the reconstructed power spectrum is consistent with the PBH formation scenario from inflation at small scales.
Article
Geosciences, Multidisciplinary
Yun-Chieh Lo, Chih-Tung Chen, Ching-Hua Lo, Sun-Lin Chung, Meng-Wan Yeh
Summary: The Taiwan mountain belt is formed from the collision between the South China Sea and the Luzon forearc, playing a crucial role in the growth of continents. The ongoing incipient collision at the southern tip of Taiwan Island provides a unique opportunity to observe the transition from oceanic to continental subduction. The Shihmen Conglomerate, composed of coarse mafic pebbles, represents a significant change in sediment provenance and tectonic events.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Mechanical
Lusheng Yuan, Liang Wang, Rui Qi, Zhenhua Zhao, Jiamei Jin, Chunsheng Zhao
Summary: This paper proposes an innovative three-stage flexible lever hollow XY piezoelectric platform powered by piezoelectric stack to enhance space efficiency and reduce the planar dimensions. The paper details the platform's design configuration and operational principles and analyzes and optimizes its static and dynamic characteristics using compliance modeling and finite element methods. Experimental results demonstrate that the platform exhibits excellent performance and can be used for precise motion positioning and inspection of minute electronic components under an optical microscope, enhancing detection and sorting processes in the electronics industry.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Civil
Pu Wang, Zhenhua Zhao, Junqi Ma, Shuguo Wang
Summary: This paper proposes an optimization method for high-speed turnout crossing structures based on the actual elastic deformations of point and splice rails, aiming to address the deficiencies in the existing design method and lack of related research. A refined simulation analysis model is established by fully considering the actual loading characteristics and spatial variable section characteristics of point and splice rails. By obtaining the elastic deformation lines of point and splice rails in the nonworking state, which are consistent with actual situations, system optimization is performed for the connecting parts of the crossing with a movable point in a high-speed turnout. The calculated optimal lengths of the connecting parts are close to the empirical values used in actual manufacturing processes, validating the proposed optimization method. The proposed method effectively improves the coordination between rails and connecting parts in crossing areas, reduces internal stresses in crossing systems, and enhances their assembly performance and service life. The optimization parameters can also provide valuable references for future high-speed turnouts research and improving the designs of existing high-speed turnouts.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT
(2023)
Article
Geochemistry & Geophysics
Huichuan Liu, Alan R. Hastie, Chiara Maria Petrone
Summary: This study conducted isotope analyses on two ocean island basalt (OIB)-associated enriched mafic intrusions in the Yunnan-Burma region, and found that these rocks may have originated from the subduction recycling of marine sediments and altered oceanic crust.
Article
Geochemistry & Geophysics
L. Notini, M. Scambelluri, A. Tommasi, A. Zanetti, F. Ferri, A. Rodriguez-Vargas, E. Rampone
Summary: This study provides important petrologic information on the mantle wedge above an active subduction zone in Southern Colombia. The researchers analyzed a unique suite of rock samples and found evidence of hydration, metasomatism, and partial melting in the mantle wedge. They also observed variations in lithotypes, textures, and mineral abundance, indicating different interactions with melts and fluids. This study sheds light on the complex petrological processes occurring in the mantle wedge and contributes to our understanding of subduction zone dynamics.
Article
Geochemistry & Geophysics
Sourav Bhattacharjee, Aniket Chakrabarty, Roger H. Mitchell, Suresh Chandra Patel, Evgeniy N. Kozlov, Ekaterina N. Fomina, Monojit Dey, Supratim Pal
Summary: The Hogenakkal complex in India consists of silicate-rich and silicate-poor carbonatites and clinopyroxenites. The formation of carbonatite is influenced by silicate minerals. The carbohydrothermal mineralization in the carbonatites is induced by magma-derived fluids and interactions with the surrounding rocks.
Article
Geochemistry & Geophysics
Jia-Min Wang, Kyle Patrick Larson, Jin-Jiang Zhang, Liang Zhao, Fu-Yuan Wu
Summary: The role of collisional belts in the global carbon budget is controversial. This study reveals a previously unrecognized carbon source in the collisional orogen of the Himalayas, where metamorphism of carbonate-bearing rocks in the hanging wall resulted in significant CO2 degassing.
Article
Geochemistry & Geophysics
Joseph Martial Akame, Elson Paiva Oliveira, Vinciane Debaille, Marc Poujol, Bernhard Schulz, Dieudonnee Bisso, Fabien Humbert, Serge Parfait Koah Na Lebogo, Philmont Zo'o Zame
Summary: Archean granitoids play key roles in the crustal evolution and can provide important insights into early geologic processes.
Article
Geochemistry & Geophysics
Xiguang Huang, Jun He, Jingxin Zhao, Jingzhao Dou, Weiyong Li, Aimin Hu, Ge Liu, Yiru Ji, Fukun Chen, Shuangqing Li
Summary: This study investigates the zircon ages and whole-rock geochemical data of Late Paleozoic magmatic rocks in the Western Yunnan Tethyan belt to identify the origin and mechanism of mantle melting. The results suggest that these magmatic rocks may originate from different mantle domains that were metasomatized by slab-derived fluids and sediment-derived melts.
