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The Origin of the Black Shale Series and Bentonites from the Wufeng Formation in the Southwestern Upper Yangtze:Implications for the Convergence of the Yangtze and Cathaysia Blocks in the Late Ordovician

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Acta Geologica Sinica(English Edition) 2022年第6期96卷 1897-1916页

作者： MIAO Yu zhou Ye zhou jiaxi TIAN Yufeng WU Liang LI Shizhong ZHANG Yaotang WANG Wanneng Kunming General Survey of Natural Resources Center China Geological SurveyKunming 650093China Faculty of Land and Resources Engineering Kunming University of Science and TechnologyKunming 650111China School of Earth Sciences Yunnan UniversityKunming 650504China

Early Paleozoic black organic sediments and bentonites occur widely in the craton basin within the Yangtze block and are generally believed to be genetically related to a specific tectonic setting on the cratonic ***,the intimate relationship between their origins and the dynamic mechanisms are unclear,as exemplified by the genesis of the black shale series and bentonites from the Wufeng Formation during the Ordovician–Silurian transition(OST).In order to reveal the relationship between the Wufeng Formation and the convergence of the Yangtze and Cathaysia blocks(i.e.,the intracontinental Kwangsian Orogeny),two stratigraphic sections respectively in Zhaotong area(Northeast Yunnan)and Puyi area(Northwestern Guizhou)that were located in the semi-restricted inner Yangtze Sea during the OST were systematically studied,on the basis of whole-rock geochemical composition,pyriteδ^(34)S(δ^(34)Spy),total organic carbon(TOC),stable Sr isotope,pyrite framboid size distribution and zircon U-Pb age,trace *** evidence shows that the paleo-oceanic environment changed significantly at the turn of the early–late Katian and formed the black shale series in the Wufeng *** acritarch assemblages were formed in the transition process of the Upper Yangtze Basin from passive continental margin basin to foreland basin during this *** on previous research on the genetic relationship between black shale series and plate tectonic movement,a basin-mountain evolution model suitable for South China in the Late Ordovician is *** two bentonites in the Wufeng Formation with U-Pb ages of 445.5±0.8 Ma and 441.9±2.4 Ma primarily originated from the intermediate–acid volcanic eruption during the collision and convergence between the Yangtze and Cathaysia blocks in the Late Ordovician,the provenance region probably being located in the Jiangnan orogenic ***,we believe that the appearance of the black shale series and bentonite in the Wufeng Forma

关键词： black shale series paleo-oceanic environment bentonites basin-mountain evolution Early Paleozoic Kwangsian Orogeny

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Research Progress of the Mineralization of Carbonate-Hosted Pb-Zn Deposits in the Sichuan-Yunnan-Guizhou Pb-Zn Metallogenic Province, Southwest China

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Acta Geologica Sinica(English Edition) 2015年第1期89卷 307-308页

作者： zhou jiaxi HUANG Zhilong YE Lin BAO Zhiwei LIU Yun XIA Yong State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences CAS Key Laboratory for Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences

The Sichuan-Yunnan-Guizhou （SYG） Pb-Zn metallogenic province in the western Yangtze Block, is a key component of the low-temperature metallogenic domain in South China. In this area, more than 400 Pb-Zn deposits have been discovered, and the total proven reserves are up to 260 million tons with lead and zinc grade reaching 10%, even up to 30%.

关键词： Pb Southwest China Research Progress of the Mineralization of Carbonate-Hosted Pb-Zn Deposits in the Sichuan-Yunnan-Guizhou Pb-Zn Metallogenic Province Zn

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Identifying the leucogranites in the Ailaoshan-Red River shear zone:Constraints on the timing of the southeastward expansion of the Tibetan Plateau

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Geoscience Frontiers 2020年第3期11卷 765-781页

作者： Xiaohu He Shucheng Tan jiaxi zhou Zheng Liu Zhifang Zhao Siqi Yang Yahui Zhang Department of Geology School of Resource Environment and Earth ScienceYunnan UniversityKunming 650091China Kunming University of Science and Technology Kunming 650093China

The uplift of the Tibetan Plateau significantly affected the global climate ***,the timing of its uplift and the formation of its vast expanse are poorly *** occurrence of two types of leucogranites(the two-mica leucogranites and garnet-bearing leucogranites) identified in the Ailaoshan-Red River(ASRR) shear zone suggests an extension event in the southeastern Tibetan *** age of these leucogranites could be used to constrain the timing of uplift and southeastward expansion of the ***,geochronology and geochemistry investigations,including Sr-Nd isotope analysis,were conducted on the two-mica leucogranites and garnet-bearing leucogranites from the ASRR shear ***-ICP-MS zircon U-Pb dating indicates that these rocks were emplaced at ~27 Ma,implying that the Tibetan Plateau had already achieved maximum uplift prior to the late *** subsequently started to expand southeastward as a result of crustal *** to classic metapelite-derived leucogranites from Himalaya,the two-mica leucogranites show high K_2 O/Na_2 O(1.31-1.92),low Rb/Sr,CaO,lower ^(87)Sr/^(86)Sr ratios(0.7089-0.7164) and higher ε_(Nd)(t)(-8.83 to-3.10).This whole-rock geochemical characteristics likely indicates a mixing source origin,composed predominantly of amphibolite with subordinated metapelite,which is also evidenced by ^(87)Sr/^(86)Sr vs.ε_(Nd)(t) ***,The garnetbearing leucogranites with high SiO_2 contents(72.25-74.12 wt.%) have high initial ^(87)Sr/^(86)Sr ratios(0.7332-0.7535) and low ε_(Nd)(t)(-16.36 to 18.98),indicating that they are derived from the source comprised of metapelite and results of fluexed muscovite melting under lower crustal level,which is also evidenced by the Rb-Sr-Ba *** leucogranites formed from partial melting of the thickened lower crust,which resulted in the formation of granitic melt that weakened the *** weakened crust aided the left-lateral strikeslip movement of the ASRR sh

关键词： Leucogranites Crustal flow Southeastward expansion Ailaoshan-red river shear zone Tibetan plateau

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“Structure-Lithologic-Fluid” Metallogenic Coupling of the Wuzhishan Lead-Zinc Deposit in Puding, Guizhou Province

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 217-219页

作者： JIN Zhongguo ZHENG Minghong zhou jiaxi HUANG Zhilong LIU Ling Non-Ferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou Stake Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy Sciences

1 Introduction The Wuzhishan lead-zinc ore-concentrated area in Puding is located in the east of the Sichuan,Guizhou and Yunnan lead-zinc metallogenic domain,with the Youjiang-Nanpan River metallogenic province to the

关键词： rock Guizhou Province Metallogenic Coupling of the Wuzhishan Lead-Zinc Deposit in Puding Structure-Lithologic-Fluid

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The mixing of multi-source fluids in the Wusihe Zn–Pb ore deposit in Sichuan Province, Southwestern China

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Acta Geochimica 2019年第5期38卷 642-653页

作者： Hongjie Zhang Haifeng Fan Chaoyi Xiao Hanjie Wen Lin Ye Zhilong Huang jiaxi zhou Qingjun Guo State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of Sciences Beijing 100049China School of Resource Environment and Earth Sciences Yunnan UniversityKunming 650504China Center for Environmental Remediation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

The Sichuan-Yunnan-Guizhou(SYG)metallogenic province of southwest China is one of the most important Zn-Pb ore zones in China,with^200 Mt ZnPb ores at mean grades of 10 wt.%Zn and 5 wt.%*** source and mechanism of the regional Zn-Pb mineralization remain controversial despite many investigations that have been *** Wusihe Zn-Pb deposit is a representative large-scale Zn-Pb deposit in the northern SYG,which mainly occurs in the Dengying Formation and yields Zn-Pb resources of^3.7 *** this paper,Zn and S isotopes,and Fe and Cd contents of sphalerite from the Wusihe deposit were investigated in an attempt to constrain the controls on Zn and S isotopic variations,the potential sources of ore-forming components,and the possible mineralization *** theδ66Zn andδ34S values in sphalerite from the Wusihe deposit increase systematically from the bottom to the top of the strata-bound *** spatial evolution inδ66Zn andδ34S values of sphalerite can be attributed to isotopic Rayleigh fractionation during sphalerite precipitation with temperature *** strong correlations between the Zn-S isotopic compositions and Fe-Cd concentrations in sphalerite suggest that their variations were dominated by a similar ***,the Rayleigh fractionation mechanism cannot explain the spatial variations of Fe and Cd concentrations of sphalerite in this *** is noted that the bottom and top sphalerites from the strata-bound orebodies document contrasting Zn and S isotopic compositions which correspond to the Zn and S isotopic characteristics of basement rocks and host rocks,***,the mixing of two-source fluids with distinct Zn-S isotopic signatures was responsible for the spatial variations of Zn-S isotopic compositions of sphalerite from the Wusihe *** fluids from basement rocks are characterized by relatively lighter Zn(~0.2‰)and S(~5‰)isotopic compositions while the fluids from host rocks are marked by relative

关键词： Sichuan-Yunnan-Guizhou Wusihe Zn-Pb deposit Zn-S isotopes Fe-Cd contents Two-source fluids

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A limb-inspired bionic quasi-zero stiffness vibration isolator

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Acta Mechanica Sinica 2021年第7期37卷 1152-1167,I0003页

作者： Rong Zeng Guilin Wen jiaxi zhou Gang Zhao State Key Laboratory of Advanced Design and Manufacture for Vehicle Body Hunan UniversityChangsha 410082China School of Mechanical and Electric Engineering Guangzhou UniversityGuangzhou 510006China

Vibration reduction has always been one of hot and important topics in mechanical engineering,especially for the special measurement *** this paper,a novel limb-inspired bionic structure is proposed to generate negative stiffness and design a new quasi-zero stiffness isolator via torsion springs,distinguishing from the existing tension spring structures in the *** nonlinear mathematical model of the proposed structure is developed and the corresponding dynamic properties are further investigated by using the Harmonic Balance method and ADAMS *** evaluate the vibration isolation performance,typical three-springs quasi-zero stiffness(TS QZS)system is selected to compare with the proposed bionic *** the graphical processing unit(GPU)parallel technology is applied to perform necessary two-parameter analyses,providing more insights into the effects of parameters on the *** is shown that the proposed structure can show advantages over the typical TS QZS system in a wider vibration isolation range for harmonic excitation case and shorter decay time for the impact excitation case.

关键词： Limb-inspired bionic structure Quasi-zero stiffness Torsion springs Two-parameter analyses

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类桁架夹层板的等效弹性常数研究

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固体力学学报 2008年第2期29卷 187-192页

作者：周加喜邓子辰西北工业大学工程力学系西安710072

从应变能等效出发,将具有周期性分布的夹层板的类桁架夹芯与各向异性连续材料等效,给出了相应的宏观等效弹性常数,进而用有限元方法计算了实际夹层板和等效夹层板的结构响应,用一个算例证明了该文方法的有效性.通过对类桁架夹芯的等效... 详细信息

从应变能等效出发,将具有周期性分布的夹层板的类桁架夹芯与各向异性连续材料等效,给出了相应的宏观等效弹性常数,进而用有限元方法计算了实际夹层板和等效夹层板的结构响应,用一个算例证明了该文方法的有效性.通过对类桁架夹芯的等效弹性常数的计算,结果表明该文方法可以得到较为准确的等效弹性常数,且较其它类型的均匀化方法大大降低了计算量.

关键词：类桁架夹层板等效弹性常数代表体积元均匀化

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Alkaline Prophyries in the Chenghai-Binchuan Tectono-Magmatic Belt,Western Yunnan Province,SW China

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 74-75页

作者： CUI Yinliang XU Heng zhou jiaxi ZHANG Miaohong JIANG Yongguo ZENG Min Yunnan Nonferrous Metals Geological Bureau Kunming 650051YunnanChina Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina Nonferrous Metal Geological Survey Yunnan Nonferrous Metals Geological BureauKunming 650216YunnanChina State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081GuizhouChina

1 Introduction Sanjiang tectonic-magma belt is one of the most potential resources’metallogenic belts in *** alkali-rich porphyry-type gold polymetallic mineralization system is a significant characteristic of ***-Bi... 详细信息

关键词： MS SW China Western Yunnan Province Alkaline Prophyries in the Chenghai-Binchuan Tectono-Magmatic Belt ICP

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Function of FEZF1 during early neural differentiation of human embryonic stem cells

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Science China(Life Sciences) 2018年第3期61卷 35-45页

作者： Xin Liu Pei Su Lisha Lu Zicen Feng Hongtao Wang jiaxi zhou State Key Laboratory of Experimental Hematology Institute of Hematology & Blood Diseases Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Center for Stem Cell Medicine Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine Peking Union Medical College

The understanding of the mechanism underlying human neural development has been hampered due to lack of a cellular system and complicated ethical issues. Human embryonic stem cells (hESCs) provide an invaluable model for dissecting human development because of unlimited self-renewal and the capacity to differentiate into nearly all cell types in the human body. In this study,using a chemical defined neural induction protocol and molecular profiling, we identified Fez family zinc finger 1 (FEZF1) as a potential regulator of early human neural development. FEZF1 is rapidly up-regulated during neural differentiation in hESCs and expressed before PAX6, a well-established marker of early human neural induction. We generated FEZF1-knockout H1 hESC lines using CRISPR-CAS9 technology and found that depletion of FEZF1 abrogates neural differentiation of hESCs. Moreover,loss of FEZF1 impairs the pluripotency exit of hESCs during neural specification, which partially explains the neural induction defect caused by FEZF1 deletion. However, enforced expression of FEZF1 itself fails to drive neural differentiation in hESCs,suggesting that FEZF1 is necessary but not sufficient for neural differentiation from hESCs. Taken together, our findings identify one of the earliest regulators expressed upon neural induction and provide insight into early neural development in human.

关键词： FEZF1 hESCs CRISPR/Cas9 neural differentiation

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对流换热边界条件的多孔材料主动散热性能

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复合材料学报 2010年第4期27卷 152-159页

作者：张凯邓子辰周加喜西北工业大学力学与土木建筑学院西安710072 大连理工大学工业装备结构分析国家重点实验室大连116024

通过推导2种不同换热边界条件下平板夹层多孔材料的散热指标,研究了考虑对流换热因素的平板夹层多孔材料主动散热性能,得到了影响材料散热性能的因素。分析了在确定的相对厚度下,不同构型多孔材料的相对密度与散热指标的关系,并得出正... 详细信息

通过推导2种不同换热边界条件下平板夹层多孔材料的散热指标,研究了考虑对流换热因素的平板夹层多孔材料主动散热性能,得到了影响材料散热性能的因素。分析了在确定的相对厚度下,不同构型多孔材料的相对密度与散热指标的关系,并得出正六边形构型的散热指数最大。随着相对厚度的增大,最大散热指标和最优相对密度增大较快,当相对厚度大于20时,最大散热指标和最优相对密度变化较小并最终趋于定值。由上述结果可以得到相对应的最小质量,随着最小质量的增大,最大散热指标增大并最终趋于定值。在相同的最大散热指标下,随着表面换热系数比值的增大,最小质量逐渐减小。最后考虑承载因素对结构进行了优化分析,正六边形构型的多孔材料具有明显的综合性能优势。

关键词：多孔材料主动散热换热系数最大散热指标性能优化

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