检索结果-南通市图书馆

The Early Mesozoic NE-SW Extensional Model and Exhumation Processes at the Southeastern Margin of the Central Asian Orogenic Belt: Insights from the Strain and Kinematic Vorticity Analysis of the Sonid Zuoqi Ductile Detachment Zone

引用

ACTA GEOLOGICA SINICA-ENGLISH EDITION 2024年第5期98卷 1141-1153页

作者： Li, Jianbo Song, Zhijie Lei, Hengcong Zeng, Tao East china univ technol Nanchang 344000 Peoples R China

The Sonid Zuoqi ductile detachment zone is located at the southeastern margin of the Central Asian orogenic belt (CAOB), striking EW and dipping to the S. The major rock type of the Sonid Zuoqi ductile detachment zone is mylonite derived from granite. The sequence of mylonite features is: (1) S and C foliations of mylonite, and (2) extensional crenulation cleavage (ecc) or C and the kinematic vorticity (Wk) value changed from 0.70 to 0.95 and from 0.37 to 0.69, respectively; the strain type of the mylonites within the Sonid Zuoqi ductile detachment zone is compressional to planar strain. The strong deformation mylonite and Halatu plutons yielded a zircon U-Pb age of 244 Ma and a zircon (U-Th)/He age of 214 Ma, respectively. Based on the strain and kinematic vorticity analysis, together with the zircon U-Pb and zircon (U-Th)/He ages and the regional tectonic background, the study area experienced three stage evolution: tangential simple-shear (244 Ma), simple-shear-dominated general shear represented by upper crustal extension (224 Ma) and pure-shear-dominated general shear represented by the Halatu pluton doming (214 Ma), which constrained the early Mesozoic NE-SW crustal extension at the southeastern margin of the CAOB. This NE-SW extension probably originated from the post-orogenic extensional collapse of the CAOB, subsequent exhumation being controlled by the far afield effects of the closure of the Mongol-Okhotsk belt.

关键词： strain simple shear pure shear kinematic vorticity ductile detachment zone METAMORPHIC CORE COMPLEX ANGLE NORMAL FAULTS INNER-MONGOLIA CRUSTAL GROWTH NORTH china EVOLUTION ORIGIN REGION AGE

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Development of a MWDC prototype of the CSR external-target experiment

引用

NUCLEAR SCIENCE AND TECHNIQUES 2024年第10期35卷 1-14页

作者： He, Zhou-Bo Qin, Zhi Ma, Peng Yang, He-Run Wei, Xiang-Lun Lu, Chen-Gui Wen, Xiang-Jie Zhang, Xiu-Ling Chen, Tao Li, Zhi-Jie Yang, Yuan-Sheng Zhan, Mei-Qiang Liu, Can-Wen Li, Meng Qiu, Tian-Li Gong, Yi-Wei Huang, Xin-Jie Yin, Xiao-Hao He, Zhi-Xuan Zhang, Jun-Wei Zou, Hai-Chuan Fu, Sheng-Wei Guo, Dong Yan, Jun-Wei Cao, Zhe Deng, Zhi Kong, Jie Xiao, Zhi-Gang Hu, Rong-Jiang Duan, Li-Min Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Peoples R China univ Chinese Acad Sci Sch Nucl Sci & Technol Beijing 100049 Peoples R China Tsinghua univ Dept Phys Beijing 100084 Peoples R China univ Sci & technol china Hefei 230026 Peoples R China Sichuan univ Inst Nucl Sci & Technol Key Lab Radiat Phys & Technol Minist Educ Chengdu 610064 Peoples R China Lanzhou univ Sch Nucl Sci & Technol Lanzhou 730000 Peoples R China North china univ Water Resources & Elect Power Zhengzhou 450000 Peoples R China

The cooling storage ring (CSR) external-target experiment (CEE) is a spectrometer used in construction to study the properties of nuclear matter in high-baryon density regions at the Heavy-Ion Research Facility in Lanzhou (HIRFL). This study presents the design, simulation, manufacturing, and testing of a half-size prototype of a multi-wire drift chamber (MWDC) for the CEE. First, the performance of the MWDC connected to homemade electronics was simulated. The results demonstrated that an energy resolution of 18.5% % for 5.9-keV X-rays and a position resolution of 194 mu m for protons can be achieved by the current design. Because the size of the largest MWDC reached 176 cm x 314 cm, a set of 98 cm x 98 cm prototypes was built using the new techniques. The positioning accuracy of the anode wires in this prototype is better than 20 mu m. After optimization, using commercially available electronics, the prototype can achieved an energy resolution of 19.7% % for a Fe-55 X-ray source. The CEE-MWDC detector and electronics were simultaneously tested. An energy resolution of 22% % was achieved for the Fe-55 source; the track residuals were approximately 330 mu m for the cosmic rays. The results demonstrate that the current design and techniques meet the requirements of the CEE-MWDC array.

关键词： CEE MWDC Garfield plus plus Fe-55 source Position resolution DRIFT CHAMBER HIRFL-CSR

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Properties of the phase diagram from the Nambu-Jona-Lasino model with a scalar-vector interaction

引用

NUCLEAR SCIENCE AND TECHNIQUES 2024年第10期35卷 1-12页

作者： Yang, Yong-Hang Liu, He Chu, Peng-Cheng Qingdao univ technol Sch Sci Qingdao 266520 Peoples R China Qingdao univ technol Res Ctr Theoret Phys Qingdao 266033 Peoples R China

We investigated the properties of the phase diagram of high-order susceptibilities, speed of sound, and polytropic index based on an extended Nambu-Jona-Lasinio model with an eight-quark scalar-vector interaction. Non-monotonic behavior was observed in all these quantities around the phase transition boundary, which also revealed the properties of the critical point. Further, this study indicated that the chiral phase transition boundary and critical point could vary depending on the scalar-vector coupling constant GSV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$G_\text {SV}$$\end{document}. At finite densities and temperatures, the negative GSV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$G_\text {SV}$$\end{document} term exhibited attractive interactions, which enhanced the critical point temperature and reduced the chemical potential. The GSV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$G_\text {SV}$$\end{document} term also affected the properties of the high-order susceptibilities, speed of sound, and polytropic index near the critical point. The non-monotonic (peak or dip) structures of these quantities shifted to a low baryon chemical potential (and high temperature) with a negative GSV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$G_\te

关键词： QCD phase diagram High-order susceptibilities Speed of sound Polytropic index NJL model QUANTUM CHROMODYNAMICS TRANSITION STATE

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Design of a large momentum acceptance proton therapy gantry utilizing AG-CCT magnets

引用

NUCLEAR SCIENCE AND TECHNIQUES 2024年第10期35卷 1-11页

作者： Liao, Yi-Cheng Liu, Xu Wang, Wei Yang, Zi-Yi Chen, Qu-Shan Qin, Bin Huazhong univ Sci & technol State Key Lab Adv Electromagnet Technol Wuhan 430074 Peoples R China

The application of superconducting (SC) technology enables magnets to excite strong fields with small footprints, which has great potential for miniaturizing proton therapy gantries. However, the slow ramping rate of SC magnets results in a low treatment efficiency compared with normal-conducting (NC) gantries. To address this problem, this study proposes a compact proton therapy gantry design with a large momentum acceptance utilizing alternating-gradient canted-cosine-theta (AG-CCT) SC magnets. In our design, a high-transmission degrader is mounted in the middle of the gantry, and the upstream beamline employs NC magnets with small apertures. Downstream of the degrader, large-bore AG-CCT magnets with strong alternating focusing gradients are set symmetrically as a local achromat, which realizes a momentum acceptance of 20% (or 40% in the energy domain). Therefore, only three magnetic working points are required to cover a treatment energy of 70-230 MeV. Owing to the large momentum acceptance, the proton beam after the degrader can be directly delivered to the isocenter without truncating its energy spectrum, which can significantly increase the treatment efficiency but causes severe dispersion effects during pencil beam scanning. Therefore, a compensation method was introduced by tuning the normal and skewed quadrupoles during the scanning process. As a result, the new gantry not only presents a remarkable reduction in the size and weight of the facility but also shows good potential for fast treatment.

关键词： Alternating-gradient canted-cosine-theta magnets Large momentum acceptance gantry Pencil beam scanning Proton therapy ENERGY DEGRADER BEAM OPTICS OPTIMIZATION

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

In-beam gamma rays of CSNS Back-n characterized by black resonance filter

引用

NUCLEAR SCIENCE AND TECHNIQUES 2024年第10期35卷 1-12页

作者： Wang, Jin-Cheng Ren, Jie Jiang, Wei Ruan, Xi-Chao Liu, Ying-Yi Yang, Hao-Lan Xu, Kuo-Zhi Pan, Xin-Yi Sun, Qi Bao, Jie Huang, Han-Xiong Bai, Hao-Fan Bai, Jiang-Bo Cao, Ping Chen, Qi-Ping Chen, Yong-Hao Duan, Wen-Hao Fan, An-Chuan Fan, Rui-Rui Feng, Chang-Qing Gu, Min-Hao Han, Chang-Cai Han, Zi-Jie He, Guo-Zhu He, Yong-Cheng Hong, Yang Hu, Yi-Wei Jiang, Zhi-Jie Kang, Ling Lan, Chang-Lin Li, Bo Li, Feng Li, Qiang Li, Xiao Li, Yang Liu, Jie Liu, Rong Liu, Shu-Bin Liu, Yi-Na Luan, Guang-Yuan Ning, Chang-Jun Qiu, Yi-Jia Ren, Wen-Kai Ren, Zhi-Zhou Song, Zhao-Hui Sun, Kang Tan, Zhi-Xin Tang, Jing-Yu Tang, Sheng-Da Wang, Li-Jiao Wang, Peng-Cheng Wang, Zhao-Hui Wen, Zhong-Wei Wu, Xiao-Guang Wu, Xuan Wu, Ze-Peng Xia, Cong Xie, Li-Kun Yi, Han Yu, Tao Yu, Yong-Ji Zhang, Guo-Hui Zhang, Hang-Chang Zhang, Qi-Wei Zhang, Xian-Peng Zhang, Yu-Liang Zhang, Zhi-Yong Zhao, Mao-Yuan Zhou, Zhi-Hao Zhu, Ke-Jun Zou, Chong china Inst Atom Energy Key Lab Nucl Data Beijing 102413 Peoples R China Chinese Acad Sci Inst High Energy Phys Beijing 100049 Peoples R China Spallat Neutron Source Sci Ctr Dongguan 523803 Peoples R China Chinese Acad Sci Inst High Energy Phys State Key Lab Particle Detect & Elect Beijing 100049 Peoples R China univ Chinese Acad Sci Beijing 100049 Peoples R China Peking univ Sch Phys State Key Lab Nucl Phys & Technol Beijing 100871 Peoples R China Fudan univ Inst Modern Phys Shanghai 200433 Peoples R China univ Sci & technol china State Key Lab Particle Detect & Elect Hefei 230026 Peoples R China univ Sci & technol china Sch Nucl Sci & Technol Hefei 230026 Peoples R China univ Sci & technol china Dept Modern Phys Hefei 230026 Peoples R China china Acad Engn Phys Inst Nucl Phys & Chem Mianyang 621900 Peoples R China univ Sci & technol china USTC Archaeometry Lab Hefei 230026 Peoples R China Northwest Inst Nucl technol Xian 710024 Peoples R China Lanzhou univ Sch Nucl Sci & Technol Lanzhou 730000 Peoples R China univ Sci & technol china Inst Adv Technol Hefei 230027 Peoples R China

The back-streaming white-neutron beamline (Back-n) of the china Spallation Neutron Source is an essential neutron- research platform built for the study of nuclear data, neutron physics, and neutron applications. Many types of cross-sectional neutron-reaction measurements have been performed at Back-n since early 2018. These measurements have shown that a significant number of gamma rays can be transmitted to the experimental stations of Back-n along with the neutron beam. These gamma rays, commonly referred to as in-beam gamma rays, can induce a non-negligible experimental background in neutron-reaction measurements. Studying the characteristics of in-beam gamma rays is important for understanding the experimental background. However, measuring in-beam gamma rays is challenging because most gamma-ray detectors are sensitive to neutrons; thus, discriminating between neutron-induced signals and those from in-beam gamma rays is difficult. In this study, we propose the use of the black resonance filter method and a CeBr3 scintillation detector to measure the characteristics of the in-beam gamma rays of Back-n. Four types of black resonance filters, Ta-181, Co-59, Ag-nat, and Cd-nat, were used in this measurement. The time-of-flight (TOF) technique was used to select the detector signals remaining in the absorption region of the TOF spectra, which were mainly induced by in-beam gamma rays. The energy distribution and flux of the in-beam gamma rays of Back-n were determined by analyzing the deposited energy spectra of the CeBr3 scintillation detector and using Monte Carlo simulations. Based on the results of this study, the background contributions from in-beam gamma rays in neutron-reaction measurements at Back-n can be reasonably evaluated, which is beneficial for enhancing both the experimental methodology and data analysis.

关键词： In-beam gamma rays Back-n Black filter resonance technique In-beam gamma rays Back-n CeBr3 scintillator Black filter resonance technique C6D6 DETECTOR SYSTEM LINE

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Suppressed Internal Intrinsic Stress Engineering in High-Performance Ni-Rich Cathode Via Multi layered In Situ Coating Structure

引用

Energy & Environmental Materials 2024年第2期7卷 58-66页

作者： Jiachao Yang Yunjiao Li Xiaoming Xi Junchao Zheng Jian Yu Zhenjiang He School of Metallurgy and Environment Central South UniversityChangsha 410083China Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083China Changsha Research Institute of mining and Metallurgy Changsha 410083China Ningbo Ronbay New Energy technol Co Ltd Tanjialing East Rd 39Ningbo 315400China

LiNi_(x)Co_(y)Al_(z)O_(2)(NCA)cathode materials are drawing widespread attention,but the huge gap between the ideal and present cyclic stability still hinders their further commercial application,especially for the Ni-rich LiNi_(x)Co_(y)Al_(z)O_(2)(x>0.8,x+y+z=1)cathode material,which is owing to the structural degradation and particles'intrinsic *** tackle the problems,Li_(0.5)La_(2)Al_(0.5)O_(4)in situ coated and Mn compensating doped multilayer LiNi_(0.82)Co_(0.14)Al_(0.04)O_(2)was *** refinement indicates that La-Mn co-modifying could realize appropriate Li/Ni disorder *** results and in situ XRD patterns reveal that the LLAO coating layer could effectively restrain crack in secondary particles benefited from the suppressed internal *** further improves as NCA-LM2 has superior mechanical *** SEM,TEM,XPS tests indicate that the cycled cathode with LLAO-Mn modification displays a more complete morphology and less side reaction with *** was used to further investigate cathode-electrolyte interface which was reflected by gas ***-LM2 releases less CO_(2)than NCA-P indexing on a more stable *** modified material presents outstanding capacity retention of 96.2%after 100 cycles in the voltage range of 3.0-4.4 V at 1C,13%higher than that of the pristine and 80.8%at 1 C after 300 *** excellent electrochemical performance could be attributed to the fact that the high chemically stable coating layer of Li_(0.5)La_(2)Al_(0.5)O_(4)(LLAO)could enhance the interface and the Mn doping layer could suppress the influence of the lattice mismatch and *** believe that it can be a useful strategy for the modification of Ni-rich cathode material and other advanced functional material.

关键词： compensating doped in situ coating multilayer material Ni-rich cathode materials suppressed internal strain

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Material Composition of the Newly Discovered Zongzhuo Formation Sedimentary Mélange in Dingri Area, Southern Tibet, and its Constraints on the Basin Controlling Dingri-Gamba Fault

引用

ACTA GEOLOGICA SINICA-ENGLISH EDITION 2024年第5期98卷 1171-1186页

作者： Yan, Songtao Ding, Ailing Dai, Xuejian Li, Hu Liu, Tao Zhu, Lidong Wu, Qingsong china Geol Survey Civil Mil Integrat Ctr Chengdu 610036 Peoples R China Chengdu univ technol Coll Earth Sci Chengdu 610059 Peoples R China Chengdu univ Informat technol Sch Software Engn Chengdu 610225 Peoples R China Chengdu univ technol Inst Sedimentary Geol Chengdu 610059 Peoples R China

The study of sedimentary m & eacute;langes holds pivotal importance in understanding orogenic processes and unveiling geodynamic mechanisms. In this study, we present findings on zircon U-Pb isotopes and whole-rock elemental data concerning the recently uncovered Zongzhuo Formation sedimentary m & eacute;langes within the Dingri area. Field observations reveal the predominant composition of the Zongzhuo Formation, characterized by a matrix of sandstone-mudstone mixed with sand-conglomerates within native blocks exhibiting soft sediment deformation. Moreover, exotic blocks originating from littoral-neritic seas display evidence of landslide deformation. Our study identifies the depositional environment of the Zongzhuo Formation in Dingri as a slope turbidite fan, with its provenance traced back to the passive continental margin. Notably, this contrasts with the Zongzhuo Formation found in the Jiangzi-Langkazi area. Based on existing data, we conclude that the Zongzhuo Formation in the Dingri area was influenced by the Dingri-Gamba fault and emerged within a fault basin of the passive continental margin due to Neo-Tethys oceanic subduction during the Late Cretaceous period. Its provenance can be attributed to the littoral-neritic sea of the northern Tethys Himalaya region. This study holds significant implications for understanding the tectonic evolution of Tethys Himalaya and for reevaluating the activity of the Dingri-Gamba fault, as it controls the active deposition of the Zongzhuo Formation.

关键词： sedimentary m & eacute lange provenance analysis Zongzhuo Formation Dingri-Gamba fault Tethys Himalaya ZIRCON U-PB MELANGE-FORMING PROCESSES GANGDESE BATHOLITH TETHYAN HIMALAYA VOLCANIC-ROCKS LHASA TERRANE SUTURE ZONE ARC LEUKOGRANITES EVOLUTION

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cascade failure modeling and resilience analysis of mine cyber physical systems under deliberate attacks

引用

JOURNAL OF SAFETY SCIENCE AND RESILIENCE 2024年第3期5卷 266-280页

作者： Wang, Xinping Zhu, Jialin Su, Chang Zhen, Xinyue Xian univ Sci & technol Sch Management Xian 710054 Peoples R China Xian univ Sci & technol Sch Safety Sci & Engn Xian 710054 Peoples R China

Guided by the intelligent construction of coal mines and integrating the concept of the Cyber-Physical System (CPS), a novel approach to a coal mine information-physical fusion system is proposed. This concept emerges from the advancement of intelligent mines and the growing need for enhanced safety in coal mine operations. From a system safety perspective, this approach aims to effectively evaluate security issues by better integrating the informational and physical layers of intelligent mines. Currently, research in areas such as power grids and water networks has widely adopted concepts of cascade failures and robustness. It is suggested that the CPS framework be adapted to the mining sector. Considering the critical role of coal mines in china's energy security and their vulnerability to cyber attacks, a mine-specific CPS system is designed. This system incorporates a model of mine information-physical fusion, including networks for mine operations, management, and control, tailored to the unique conditions of mine shafts and underground settings. Utilizing Markov process theory, the paper delves into the theoretical study of the cascade failure process under deliberate attack strategies. This analysis is essential to effectively assess the safety issues within the information-physical system, providing vital support for fault prediction and safety analysis. The model of cascading failures in the mine information-physical system is developed, and based on an analysis of resilience and robustness, the study identifies key factors influencing the security of mine information-physical systems. Critical factors affecting the reliability of these systems include the number of system nodes, node coupling, edge count, and the interconnection methods of the dual-layer dependency network. The paper concludes by discussing the challenges in analyzing the security of information-physical systems and suggesting directions for future research.

关键词： Mine cyber physical system Cascading failure Resilience Robustness INTERDEPENDENT NETWORK RELIABILITY ASSESSMENT COMPLEX NETWORKS ROBUSTNESS SECURE

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Outstanding proton conductivity over wide temperature and humidity ranges and enhanced mechanical, thermal stabilities for surface-modified MIL-101-Cr-NH2/Nafion composite membranes

引用

GREEN ENERGY & ENVIRONMENT 2024年第11期9卷 1734-1746页

作者： Li, Xu Zhang, Dongwei Chen, Si Geng, Yingzhao Liu, Yong Qian, Libing Chen, Xi Li, Jingjing Fang, Pengfei He, Chunqing Wuhan univ Sch Phys & Technol Key Lab Nucl Solid State Phys Hubei Prov Wuhan 430072 Peoples R China Hubei univ Sci & technol Sch Nucl Technol & Chem & Biol Xianning 437100 Peoples R China Foshan univ Sch Mat Sci & Hydrogen Energy Guangdong Key Lab Hydrogen Energy Technol Foshan 528000 Peoples R China

High-performance proton exchange membranes are of great importance for fuel cells. Here, we have synthesized polycarboxylate plasticizer modified MIL-101-Cr-NH2 (PCP-MCN), a kind of hybrid metal organic framework, which exhibits a superior proton conductivity. PCP-MCN nanoparticles are used as additives to fabricate PCP-MCN/Nafion composite membranes. Microstructures and characteristics of PCP-MCN and these membranes have been extensively investigated. Significant enhancement in proton conduction for PCP-MCN around 55 degrees C is interestingly found due to the thermal motion of the PCP molecular chains. Robust mechanical properties and higher thermal decomposition temperature of the composite membranes are directly ascribed to strong intermolecular interactions between PCP-MCN and Nafion side chains, i.e., the formation of substantial acid-base pairs (-SO3 ...H+-NH-), which further improves compatibility between additive and Nafion matrix. At the same humidity and temperature condition, the water uptake of composite membranes significantly increases due to the incorporation of porous additives with abundant functional groups and thus less crystallinity degree in comparison to pristine Nafion. Proton conductivity (sigma) over wide ranges of humidities (30 100% RH at 25 degrees C) and temperatures (30 98 degrees C at 100% RH) for prepared membranes is measured. The sigma in PCPMCN/Nafion composite membranes is remarkably enhanced, i.e. 0.245 S/cm for PCP-MCN-3wt.%/Nafion is twice that of Nafion membrane at 98 degrees C and 100% RH, because of the establishment of well-interconnected proton transport ionic water channels and perhaps faster protonation- deprotonation processes. The composite membranes possess weak humidity-dependence of proton transport and higher water uptake due to excellent water retention ability of PCP-MCN. In particular, when 3 wt.% PCP-MCN was added to Nafion, the power density of a single-cell fabricated with this composite membrane reaches imp

关键词： Nafion composite membrane Surface-modified MIL-101-Cr-NH2 Proton conductivity Single-cell performance METAL-ORGANIC FRAMEWORK FUEL-CELLS GRAPHENE OXIDE HYBRID MEMBRANE NAFION MATRIX ACID DURABILITY SUPERPLASTICIZERS ANNIHILATION DENSITY

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Influence of the Closure of the East Paleo-Tethys Ocean on Southern South china: Evidences from Kinematics and 40Ar/39Ar Geochronology of the Rongxian Ductile Shear Zone in Southeastern Guangxi

引用

ACTA GEOLOGICA SINICA-ENGLISH EDITION 2024年第5期98卷 1125-1140页

作者： Huang, Wenqiang Li, Saisai Xin, Liangwei Feng, Zuohai Zhang, Hongrui Geng, Jieli Liu, Kun Shi, Chunyan Guilin univ technol Collaborat Innovat Ctr Explorat Nonferrous Met Dep Guilin 541004 Guangxi Peoples R China Guilin univ technol Coll Earth Sci Guilin 541004 Guangxi Peoples R China Chinese Acad Geol Sci Inst Geol Beijing 100037 Peoples R China Guilin univ technol Coll Tourism & Landscape Architecture Guilin 541004 Guangxi Peoples R China

The Triassic was a crucial period in the tectonic evolution of the South china Block. Research on tectonic deformation during this period provides information on intracontinental orogenic mechanisms in South china. In this study, alongside thermochronological analyses, we examine the macroscopic and microscopic structural features of the Rongxian ductile shear zone, located south of the Darongshan granite in the southeastern part of Guangxi Province, on the southern margin of South china. Sinistral shear is indicated by the characteristics of rotated sigma-type feldspar porphyroclasts, stretching lineations defined by elongated quartz grains and the orientations of quartz c-axes. LA-ICP-MS U-Pb dating of zircons from two samples of granitic mylonite and one of granite yielded ages of ca. 256 Ma. Furthermore, two samples of granitic mylonite yield muscovite Ar-40/Ar-39 plateau ages of 249-246 Ma. These results indicate that the Rongxian ductile shear zone resulted from Early Triassic deformation of the late Permian Darongshan granite. This deformation was likely related to the closure of the eastern Paleo-Tethys Ocean and the subsequent collision of the South china and Indochina blocks, during the early stage of the Indosinian orogeny.

关键词： ductile shear zone Ar-40/Ar-39 geochronology Triassic South china Block East Paleo-Tethys Ocean AILAOSHAN SUTURE ZONE ULTRAHIGH-TEMPERATURE METAMORPHISM ARC/BACK-ARC ASSEMBLAGES PLATE TECTONIC CYCLE TRUONG SON BELT VOLCANIC-ROCKS INDOSINIAN COLLISION PLASTIC-DEFORMATION MESOZOIC GRANITOIDS GRANULITE ENCLAVES

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：