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Triassic integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 1152-1194页

作者： guichun wu Zhansheng JI Gary GLASH Qinggao ZENG Jianxin YAO Key Laboratory of Stratigraphy and Palaeontology Ministry of Natural ResourcesInstitute of GeologyChinese Academy of Geological SciencesBeijing 100037China SinoProbe Laboratory Chinese Academy of Geological SciencesBeijing 100094China Department of Geology and Environmental Sciences State University of New York-FredoniaFredoniaNY 14063USA Xizang Autonomous Region Geological and Mineral Exploration and Development Burea Lhasa 850010China

Rocks of the Qinghai-Tibetan Plateau(QTP)host abundant Triassic *** far,the well established marine fossil sequences based on ammonoids,conodonts,bivalves,brachiopods,radiolarians,and terrestrial spora-pollen sequence have become standard for biostratigraphic correlation of the *** much of Triassic time,the QTP occupied a marine setting as suggested by the dominance of marine *** main sedimentary types represented in the Triassic successions include littoral to shallow marine clastic rocks,shallow marine carbonate platform carbonates,bathyal to abyssal slope carbonates intercalated with clastic and siliceous deposits,coal-bearing clastic strata contained within paralic facies deposits,and littoral and terrestrial volcaniclastic *** deposits are organized into four stages in ascending order:(1)Early Triassic deposits that record marine transgression,including extensive shallow marine carbonate platform strata.(2)Middle Triassic Ladinian to Late Triassic Carnian deposits,including thin-bedded limestone,fine clastics,and siliceous rocks,that accumulated at greater depths than underlying Early Triassic strata and reflect the peak of the *** activity appears to have occurred in some areas during this stage.(3)Late Triassic Norian deposits that record the onset of marine regression as suggested by the widespread occurrence of platform *** is noteworthy that stage 3 deposits of the Qin-Qi-Kun area in the northernmost region of the QPT is dominated by terrestrial strata and displays evidence of local erosion.(4)Late Triassic Rhaetian littoral and shallow marine clastic and coal-bearing deposits that preserve the record of continued marine regression *** Indus-Yarlungzangbo Suture Zone(IYSZ)appears to have been the rifting axis during Triassic time as suggested by sedimentary facies trends that reflect deepening to south and ***,the Himalaya Block to the south of the IYSZ was part of the passive margin

关键词： Qinghai-Tibetan Plateau Triassic Biostratigraphy Lithostratigraphy Palaeobiogeography Sedimentary palaeogeography

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New Discovery of Radiolarians in the Pomulong Mélange, Middle part of the Yarlung Zangbo Suture Zone, Tibet

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 1139-1141页

作者： SUN Qian JI Zhansheng wu guichun WAN Xiaoqiao School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Chinese Academy of Geological Sciences Beijing 100037China Institute of Geology CAGSBeijing 100037China

Objective The Pomulong mélange was established in the regional geological survey of Lhaze County at the scale of 1:250000 by the Geological Survey Institute of Hubei Province.

关键词： Middle Radiolarians lange

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Conodont Biostratigraphy and Age Determination of the Lower-Middle Triassic Boundary in South Guizhou Province,China

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Acta Geologica Sinica(English Edition) 2011年第2期85卷 408-420页

作者： YAO Jianxin JI Zhansheng WANG Liting WANG Yanbin wu Zhenjie LIU Dunyi wu guichun ZHANG Jianwei LI Suping Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Guizhou Bureau of Geology and Mineral Resources Guiyang 550004 China

The demarcation of the Lower-Middle Triassic boundary is a disputed problem in global stratigraphic research. Lower-Middle Triassic strata of different types, from platform to basin facies,are well developed in Southwest China. This is favorable for the study of the Olenekian-Anisian boundary and establishing a stratotype for the Qingyan Stage. Based on research at the Ganheqiao section in Wangmo county and the Qingyan section in Guiyang city, Guizhou province, six conodont zones have been recognized, which can be correlated with those in other regions, in ascending order as follows： 1, Neospathodus cristagalli Interval-Zone; 2, Neospathodus pakistanensis Interval-Zone; 3,Neospathodus waageni Interval-Zone; 4, Neospathodus homeri-N, triangularis Assemblage-Zone; 5,Chiosella timorensis Interval-Zone; and 6, Neogongdolella regalis Range-Zone. An evolutionary series of the Early-Middle Triassic conodont genera Neospathodus-Chiosella-Neogongdolella discovered in the Ganheqiao and Qingyan sections has an intermediate type named Neospathodus qingyanensis that appears between Neospathodus homeri and Chiosella timorensis in the upper part of the Neospathodus homeri-N, triangularis Zone, showing an excellent evolutionary relationship of conodonts near the Lower-Middle Triassic boundary. The Lower-Middle Triassic boundary is located at 1.5 m below the top of the Ziyun Formation, where Chiosella timorensis Zone first appears in the Qingyan section,whereas this boundary is located 0.5 m below the top of the Ziyun Formation, where Chiosella timorensis Zone first appears in the Ganheqiao section. There exists one nearly 6-m thick vitric tuff bed at the bottom of the Xinyuan Formation in the Ganheqiao section, which is usually regarded as a lithologic symbol of the Lower-Middle Triassic boundary in South China. Based on the analysis of high -precision and high-sensitivity Secondary Ion Mass Spectrum data ,the zircon age of this tuff has a weighted mean 206Pb/238U age of 239.0±2.9

关键词： L-M Triassic Qingyan Stage conodont biostratigraphy isotope chronology South China

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Distribution of the Permian Monodiexodina in Karakorum and Kunlun and its Geological Significance

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Acta Geologica Sinica(English Edition) 2009年第2期83卷 229-237页

作者： YAO Jianxin WANG Naiwen XIAO Xuchang JI Zhansheng wu guichun wu Zhenjie LI Boqin WANG Jun WANG Yong ZHAI Qingguo Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Chang＇an University Xi＇an Shaanxi 712000 China

The Permian fusulinoidean genus Monodiexodina is widely distributed in east Tethys. The genus might be an important indicator for the northern margin of Gondwana in northwestern China, but this is disputed. Monodiexodina-bearing areas can be restored as in either northern or southern middle latitudes with a symmetrical distribution between a high latitudinal, cool/cold water climatic realm and a paleotropical, warm water realm. Permian strata bearing Monodiexodina in Karakorum, Muztag Pear, and Buka Daban Pear of the east Kunlun Mountains can be correlated with each other. Faunal analyses and the stratigraphical position of Monodiexodina-bearing strata indicate that both Karakorum, east Kunlun, and the Pamirs were formed in a cool temperate sea area of the northern hemisphere in middle latitudes during the Permian, rather than at the Gondwana margin.

关键词： Monodiexodina middle latitude symmetric distribution cool temperate sea area,Karakorum east Kunlun northern hemisphere

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Status of Stratigraphy Research in China

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1069-1081页

作者： YAO Jianxin BO Jingfang HOU Hongfei WANG Zejiu MA Xiulan LIU Fengshan HU Guangxiao JI Zhansheng wu guichun wu Zhenjie LI Suping GUO Caiqing LI Ya Key Laboratory of Stratigraphy and Paleontology Ministry of Land and Resources Institute of GeologyChinese Academy of Geological Sciences Beijing 100037 China Chinese Academy of Geological Sciences Beijing 100037 China China Geological Survey Beijing 100037 China

Scientific research and productive practice for earth history are inseparable from the accurate stratigraphic framework and time framework. Establishing the globally unified, precise and reliable chronostratigraphic series and geological time series is the major goal of the International Commission on Stratigraphy （ICS）. Under the leadership of the ICS, the countries around the world have carried out research on the Global Standard Stratotype-section and Points （GSSPs） for the boundaries of chronostratigraphic systems. In the current International Chronostratigraphic Chart （ICC）, 65 GSSPs have been erected in the Phanerozoic Eonothem, and one has yet been erected in the Precambrian Eonothem. Based on the progress of research on stratigraphy especially that from its subcommissions, the ICS is constantly revising the ICC, and will publish a new International Stratigraphic Guide in 2020. After continual efforts and broad international cooperation of Chinese stratigraphers, 10 GSSPs within the Phanerozoic Eonothem have been approved and ratified to erect in China by the ICS and IUGS. To establish the standards for strafigraphic division and correlation of China, with the support from the Ministry of Science and Technology, the National Natural Science Foundation of China and the China Geological Survey, Chinese stratigraphers have carried out research on the establishment of Stages in China. A total of 102 stages have been defined in the ＂Regional Chronostratigraphic Chart of China （geologic time）＂, in which 59 stages were studied in depth. In 2014, the ＂Stratigraphic Chart of China＂ was compiled, with the essential contents as follows： the correlation between international chronostratigraphy and regional chronostratigraphy of China （geologic time）, the distributive status of lithostratigraphy, the characteristics of geological ages, the biostratigraphic sequence, the magnetostratigraphy, the geological events and eustatic sea-level change during every geological stage.

关键词： Stratigraphy research process status China.

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融合人工智能技术与AR实景技术的家装平台

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科技创新与生产力 2024年第1期45卷 138-141页

作者：吴桂纯陈梓璇李秋辉唐一星张金婷广州新华学院广东东莞523000

本文指出随着信息时代的飞速发展,人们的生活水平不断提高,对于居家环境的要求随之提高。以家装设计行业为研究对象,本文以AR技术、3D建模等理论为支撑,开发了一个虚拟现实家装设计App。该App功能齐全,满足客户需求以及商家运营需求,性... 详细信息

本文指出随着信息时代的飞速发展,人们的生活水平不断提高,对于居家环境的要求随之提高。以家装设计行业为研究对象,本文以AR技术、3D建模等理论为支撑,开发了一个虚拟现实家装设计App。该App功能齐全,满足客户需求以及商家运营需求,性能良好,经过测试,达到了预期效果,可用于实际中,帮助更多家装用户规避骗局、提升生活品质。

关键词：家装 AR 3D模拟场景云设计

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校园文化建设:社会主义特点、时代特征、学校特色

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高校理论战线 2006年第4期 43-45页

作者：吴贵春张敬文安徽科技学院社科部 233100 江西师范大学商学院 330022

校园文化建设必须把握社会主义特点、时代特征和学校特色,做到三者的有机统一,充分发挥其重要的育人功能。

关键词：校园文化社会主义特点时代特征学校特色

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A predatory soil bacterium reprograms a quorum sensing signal system to regulate antifungal weapon production in a cyclic-di-GMP-independent manner

A predatory soil bacterium reprograms a quorum sensing signa...

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中国植物病理学会2021年学术年会

作者：李开怀 XU Gaoge WANG Bo wu guichun HOU Rongxian 刘凤权 College of Plant Protection Nanjing Agricultural University Institute of Plant Protection Jiangsu Academy of Agricultural Sciences

Soil bacteria often provide multiple weapons to use against eukaryotes or prokaryotes *** signal factors（DSFs） represent a unique group of quorumsensing（QS） chemicals that modulate interspecies competition inbacteriathat do not produce antibiotic-like ***,themolecular mechanism by which DSF-mediated QS systems regulate weapons production for interspecies competition remains largely unknown in soil biocontrol *** this study,we found that the necessary QS system component protein RpfG from Lysobacter,in addition to being a cyclic dimeric GMP（c-di-GMP） phosphodiesterase（PDE）,regulates the biosynthesis of an antifungal weapon（heatstable antifungal factor,HSAF）,which does not appear to depend on the enzymatic ***,we showed for the first time that RpfG interacts with three hybrid two-component system（HyTCS） proteins,HtsHl,HtsH2,and HtsH3,to regulate HSAF production in *** vitro studies showed that each of these proteins interacted with RpfG,which reduced the PDE activity of ***,we showed that the cytoplasmic proportions of these proteins depended on their phosphorylation activity andbinding tothe promoter controlling the genes implicated in HSAF *** findings reveal apreviously uncharacterized mechanism of DSF signalling in antifungal weapon production in soilbacteria.

关键词： DSFs PDE HyTCS Quorum sensing signal system

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拉萨地块措勤地区早三叠世牙形石生物地层学新进展

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微体古生物学报 2021年第4期38卷 334-351页

作者：李涌溪纪占胜武桂春中国地质科学院北京100037 中国地质大学(北京) 北京100083 中国地质科学院地质研究所北京100037

牙形石生物地层学研究表明,拉萨地块发育海相下三叠统沉积,根据岩性可分为白云岩和灰岩。白云岩中的牙形石齿体粗壮,属种单一,属于Pachycladina-Hadrodontina序列;而灰岩中的牙形石属种分异度大,以齿片型牙形石为主,属于Neospathodus-No... 详细信息

牙形石生物地层学研究表明,拉萨地块发育海相下三叠统沉积,根据岩性可分为白云岩和灰岩。白云岩中的牙形石齿体粗壮,属种单一,属于Pachycladina-Hadrodontina序列;而灰岩中的牙形石属种分异度大,以齿片型牙形石为主,属于Neospathodus-Novispathodus序列。Neospathodus-Novispathodus序列因分布广、划分精细,在地层划分对比中得到了更为广泛的关注。然而,在前期对拉萨地块的研究中,该序列在划分精度上明显不足,Dienerian亚阶至Smithian亚阶牙形石带尚未建立,不利于与其他地区的下三叠统进行精确对比。为了完善拉萨地块早三叠世的Neospathodus-Novispathodus牙形石序列,本文对措勤地区敌布错剖面的下三叠统进行重新采样研究,取得了新的认识:首次确定牙形石种Eurygnathodus costatus在敌布错剖面的存在;识别并建立了Dienerian亚阶至Smithian亚阶的2个牙形石生物带,自下而上为Neospathodus dieneri带和Novispathodus waageni-Eurygnathodus costatus组合带。本研究表明拉萨地块灰岩相的早三叠世序列比较完整,可与华南等地区的牙形石带进行很好的对比。

关键词： Eurygnathodus costatus Neospathodus-Novispathodus 牙形石带早三叠世拉萨地块措勤地区

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Sigma factor 70 RpoD contributes to virulence via regulating cell motility,oxidative stress tolerance and manipulating the expression of hrpG and hrpX in Xanthomonas oryzae ***

Sigma factor 70 RpoD contributes to virulence via regulating...

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中国植物病理学会2023年学术年会

作者： XU Zhizhou wu guichun WANG Bo GUO Baodian ZHAO Yancun SHENG Cong LIU Fengquan Department of Plant Pathology College of Plant ProtectionNanjing Agricultural University Institute of Plant Protection Jiangsu Academy of Agricultural SciencesJiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology

Xanthomonas oryzae ***( Xoo) causes bacterial blight in rice, which reduces crop yield and leads to significant economic *** sigma factor are highly specialized proteins that allow RNA polymerase to recognize and bind to specific *** this study, we found that that sigma factor 70 RpoD is quite conservative among phytopathogenic bacteria by bioinformatics *** contributes to oxidative stress tolerance and cell motility, and is essential for full virulence of *** addition, RNA-seq and CUT & Tag analysis indicated that RpoD play an important role in positively regulating the type three secretion system(T3 SS) and related *** performing bacterial one-hybrid and eleetrophoretie mobility assay(EMSA), we observed that RpoD directly bound to the promoters of hrpG and ***, these results demonstrate the transcriptional mechanism and pathogenic roles of RpoD in regulating cell motility and oxidative stress response, and the findings will provide novel insights into potential targets for disease control.

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