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Conodont diversification during the Ordovician:A perspective from North China and Tarim(Northwestern China)

Science China Earth Sciences 2014年第3期57卷 397-407页

作者： wu rongchang Ian G. PERCIVAL Svend STOUGE ZHAN RenBin State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences W. B. Clarke Geoscience Centre Geological Survey of New South Wales Geological Museum University of Copenhagen

Review of the literature on Ordovician conodont diversification in palaeoplates of North and Western China reveals that four diversity peaks are present in North China,occurring in the middle Tremadocian,early Floian,late Floian,and late Darriwilian,with three of these peaks(excepting that in the late Floian)also being recorded in *** diversification intervals are present in North China,during the Tremadocian,late Floian,early and middle Darriwilian;comparable intervals are observed in the early and late Tremadocian,early Floian,and the Middle Ordovician in *** main conodont diversification episode in both palaeoplates took place in the Darriwilian,at the time of the Great Ordovician Biodiversification Event.A comparison of conodont diversity patterns in different palaeoplates(North China,Tarim,and South China)demonstrates that conodont radiation events mainly occurred within the Tremadocian,Floian,and *** diversifications in these paleoplates also display some *** contrasting with Tarim and South China,North China witnessed a rapid conodont diversification during late Floian *** diversity in North China and Tarim increased continually and reached a peak in the late Darriwilian,concurrent with a prominent decreasing trend in South *** of conodont diversification in these three palaeoplates may be related to their palaeogeography and tectonic *** conodont diversifications in North China and Tarim are analysed on the background of palaeoenvironments,the main episodes are seen to be partly coincident with second order sea-level changes,particularly in North *** general,conodont radiation correlates with large scale transgressions.

关键词： conodont diversification Ordovician North China Tarim

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Silurian integrative stratigraphy and timescale of China

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Science China Earth Sciences 2019年第1期62卷 89-111页

作者： Jiayu RONG Yi WANG Renbin ZHAN Junxuan FAN Bing HUANG Peng TANG Yue LI Xiaole ZHANG rongchang wu Guangxu WANG Xin WEI State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of Sciences Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences College of Earth and Planetary Science University of Chinese Academy of Sciences School of Earth and Space Science Peking University University of Science and Technology of China

Silurian is a period with the shortest duration in Phanerozoic except for the Neogene and Quaternary. It represents an important and unique interval when the biotic diversity recovered quickly after the end-Ordovician mass extinction, different paleoplates or terranes conjoined, big oceans disappeared or narrowed, climate and sea level changed frequently, global biotic provincialism became weaker, some primitive plants started to occupy the land. Silurian is also the first system of which all the chronostratigraphic stratotypes(i.e. the GSSPs) including four series and seven stages were established by the International Subcommission on Silurian Stratigraphy(ISSS). Nonetheless, during the post-GSSP studies conducted by ISSS in the middle1980 s, some Silurian GSSPs were found to have some congenital defects such as no index fossils available that hinder the high resolution subdivision and correlation on a regional or global scale. In this paper, based on the latest development of Silurian study in China, the progress in biostratigraphy, chronostratigraphy, event stratigraphy(such as facies differentiation, heterochrony of black shales, marine red beds, carbonate rocks and reefs), chemostratigraphy, and tectonic stratigraphy(e.g., widespread of the late Silurian rocks in South China and its tectonic implication) are systematically summarized. Some existing problems and the areas to be focused in future work are also discussed. It is suitable for chronostratigraphic study to concentrate not only on the boundary but also doing multidisciplinary analysis on the biotic, chemical, magnetic, environmental, and chronologic aspects, in order to enhance the reliability and the potential for regional and global correlation of a certain *** important achievements are expected in these areas in the Silurian study in China:(1) ecostratigraphy and basin analysis of the Llandovery, and the correlation of integrative stratigraphy with a high resolution;(2) establishment of the W

关键词： Silurian Biostratigraphy Chronostratigraphy Chemostratigraphy Black shales Shallow marine red beds Paleogeography Sedimentary hiatus

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Reconstruction of the Yangtze Ramp during Floian to Darriwilian(Ordovician)in South China:Its Morphology,Controlling Factors and Significances

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Acta Geologica Sinica(English Edition) 2023年第6期97卷 1756-1777页

作者： LUAN Xiaocong Andre DESROCHERS wu rongchang LIU Jianbo WANG Guangxu LIANG Yan ZHANG Yuchen WEI Xin LI Lixia ZHAN Renbin State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontologyand Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China Department of Geological Science University of SaskatchewanSaskatoonSaskatchewan S7N 5E2Canada Department of Earth and Environmental Sciences University of OttawaOttawaOntario K1N 6N5Canada Paleontology and Stratigraphy School of Earth and Space SciencesPeking UniversityBeijing 100871China University of Chinese Academy of Sciences Beijing 100049China

A robust stratigraphic framework and a coherent depositional ramp model for the Zitai,Dawan,Meitan and Ningkuo formations of Floian–Darriwilian age(Early–Middle Ordovician)in the Yangtze(Daoba,Xiangshuidong,Daling,Gudongkou and Honghuayuan sections)and Jiangnan regions(Nanba section)was created based on lithofacies and major element *** siliciclastic(LF1–3)and six carbonate(LF4–9)lithofacies are recognized representing sediments that were deposited in mixed siliciclastic and carbonate ramp *** intensity of mixed sedimentation and terrigenous input were evaluated using the elemental proxies Intensity of Mixed sedimentation(IM)and Aluminum Accumulation Rate(Al AR),as well as their mean values during certain time *** sediments are most well-developed along the marginal Yangtze region,strongly impacted by recurrent influx of westerly derived terrigenous materials in response to global eustatic changes and regional tectonic movements,shaping the gently southeast-dipping *** terrigenous influx resulted in periods of enhanced primary productivity on the Yangtze Ramp as evidenced by matching biodiversity peaks in planktonic organisms,i.e.,chitinozoans and *** and other shelly fauna were also able to proliferate as new niches developed along the gently dipping ramp floor with substrate *** biodiversification patterns suggest that terrigenous influx controlled in part by regional tectonics played a more important role than previously thought in the development of Great Ordovician Biodiversification Event in South China.

关键词： mixed siliciclastic-carbonate sedimentation ramp Stage Slice lithofacies major elements Great Ordovician Biodiversification Event(GOBE)

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川南布拖县乌科志留纪早期介形类丽足介目(Myodocopida)

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微体古生物学报 2014年第4期31卷 358-372页

作者：王尚启吴荣昌中国科学院南京地质古生物研究所南京210008

乌科剖面位于四川布拖县乌科乡境内。在此剖面的石门坎组上碎屑岩段中产有相当丰富的介形类丽足介目,特别是球茎介科的化石。经研究、鉴定,初步划分出2个属和6个种,其中包括3个新种(Entomozoe bispinosa ***.,***.,*** ***.),1个比较种... 详细信息

乌科剖面位于四川布拖县乌科乡境内。在此剖面的石门坎组上碎屑岩段中产有相当丰富的介形类丽足介目,特别是球茎介科的化石。经研究、鉴定,初步划分出2个属和6个种,其中包括3个新种(Entomozoe bispinosa ***.,***.,*** ***.),1个比较种和2个未定种。在分析上述属、种,特别是相关种的地质、地理分布特征的基础上,并参考其他门类化石(如腕足类动物群)和岩石性质,提出石门坎组上碎屑岩段可能要低于笔石***带上部,大致相当于志留纪兰多维列世特列奇期早期。Entomozoe和球茎介科的最早代表推测是产自石门坎组上碎屑岩段Entomozoe的那些分子,如***.,而非***(Jones),1861(或其亲缘种***)(Siveter et al.,1990,2006)。文中还就上述丽足介目动物群的生态环境进行了分析,指出石门坎组上碎屑岩段可能是在陆棚浅水到相对较深水、能量较低的、温暖的开阔海环境下沉积的。

关键词：介形类丽足介目新种志留纪兰多维列世特列奇期古生态乌科剖面布拖县四川

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外墙真石漆施工工艺及质量通病防治研究

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重庆建筑 2020年第12期19卷 48-51页

作者：吴荣昌厦门辉煌装修工程有限公司福建厦门361012

真石漆作为一种外墙装饰材料,具有耐污性好、耐擦洗、粘接力强、无毒环保、使用寿命长等优点,被广泛应用于外墙装饰等方面。该文简要介绍了真石漆的特点及施工工艺,针对工程实例中常见的几种质量通病出现的原因进行分析,并提出了一些预... 详细信息

真石漆作为一种外墙装饰材料,具有耐污性好、耐擦洗、粘接力强、无毒环保、使用寿命长等优点,被广泛应用于外墙装饰等方面。该文简要介绍了真石漆的特点及施工工艺,针对工程实例中常见的几种质量通病出现的原因进行分析,并提出了一些预防措施,对提高真石漆的施工质量有一定参考作用。

关键词：真石漆外墙装饰施工工艺质量通病

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湖北恩施志留系秀山组顶部的牙形刺及其地层意义

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微体古生物学报 2018年第2期35卷 157-169页

作者：闫冠州吴荣昌王怿唐鹏中国科学院南京地质古生物研究所中国科学院资源地层学与古地理学重点实验室南京210008 中国科学技术大学研究生院合肥230026 中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室南京210008

本文描述了湖北恩施太阳河灯草坪剖面志留系秀山组顶部灰岩夹层中的牙形刺。秀山组顶部的灰岩产出较丰富的牙形刺化石,共10属14种,包括Pterospathodus eopennatus,***,Apsidognathus sp.,Ozakodina paraplanussima,Ozakodina sp.,?Distomodus sp.,?Tuberocostadontus sp.,Coryssagnathus shaannanensis,wurmiella recave,wurmiella sp.,Oulodus shiqianensis,Oulodus sp.,Pseudooneotodus beckmanni,Distomodus sp.。根据牙形刺的产出情况,可识别出两个牙形刺带。秀山组顶部灰岩可归入Pterospathodus eopennatus超带的*** ssp.n.2带。需要指出的是,秀山组最顶部样品发现了***,因此,秀山组顶部的时代延伸至Pterospathodus celloni超带的***带,时代为兰多维列世特列奇早-中期。

关键词：牙形刺志留系兰多维列统秀山组恩施湖北

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Ballistic performances of the hourglass lattice sandwich structures under high-velocity fragments

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Defence Technology（防务技术） 2024年第1期31卷 312-325页

作者： He-xiang wu Jia Qu Lin-zhi wu Key Laboratory of Advanced Ship Materials and Mechanics College of Aerospace and Civil EngineeringHarbin Engineering UniversityHarbin150001China School of Civil Engineering Northeast Forestry UniversityHarbin150040China

In this paper,the numerical simulation method is used to study the ballistic performances of hourglass lattice sandwich structures with the same mass under the vertical incidence of *** is paid to elucidating the influences of rod cross-section dimensions,structure height,structure layer,and rod inclination angle on the deformation mode,ballistic performances,and ability to change the ballistic direction of *** results show that the ballistic performances of hourglass lattice sandwich structures are mainly affected by their structural *** this respect,structural parameters optimization of the hourglass lattice sandwich structures enable one to effectively improve their ballistic limit velocity and,consequently,ballistic performances.

关键词： Hourglass lattice sandwich structures Ballistic performances high-velocity Finite element analysis

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Resilience-incorporated seismic risk assessment of precast concrete frames with“dry”connections

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 403-425页

作者： wu Chenhao Tang Yuchuan Cao Xuyang wu Gang Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Nanjing 211102China Department of Civil and Environmental Engineering University of CaliforniaLos AngelesCA 90095USA School of Civil Engineering Southeast UniversityNanjing 211102China College of Civil and Transportation Engineering Hohai UniversityNanjing 210024China

A resilience-incorporated risk assessment framework is proposed and demonstrated in this study to manifest the advantageous seismic resilience of precast concrete frame(PCF)structures with“dry”connections in terms of their low damage and rapid *** framework integrates various uncertainties in the seismic hazard,fragility,capacity,demand,loss functions,and post-earthquake *** this study,the PCF structures are distinguished from ordinary reinforced concrete frame(RCF)structures by characterizing multiple limit states for the PCF based on its unique damage ***,probabilistic story-wise pushover analyses are performed to yield story-wise capacities for the predefined limit *** the seismic resilience analysis,a step-wise recovery model is proposed to idealize the functionality recovery process,with separate considerations of the repair and non-repair *** recovery model leverages the economic loss and downtime to delineate the stochastic post-earthquake recovery curves for the resilience loss *** such,contingencies in the probabilistic post-earthquake repairs are incorporated and the empirical judgments on the recovery parameters are largely *** proposed framework is demonstrated through a comparative study between two“dry”connected PCFs and one RCF designed as alternative structural systems for a prototype *** results from the risk quantification indicate that the PCFs show reduced loss hazards and lower expected losses relative to the ***,the PCF equipped with energy dissipation devices at the“dry”connections largely reduces the expected economic loss,downtime,and resilience loss by 29%,56%,and 60%,respectively,compared to the RCF.

关键词： precast concrete frame non-emulative precast system seismic resilience seismic risk functional recovery

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New findings on the influence of El Nino events on tropical cyclone formation

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Science China Earth Sciences 2024年第3期67卷 892-893页

作者： Liguang wu Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China

Tropical cyclones typically form over warm tropical and subtropical ocean surfaces, as their formation and intensification rely primarily on the energy provided by the ocean. Pioneering research by Gray (1968) revealed that the formation of tropical cyclones requires the sea surface temperature (SST) to be no less than 26.5℃. Consequently, SST is commonly recognized as a crucial parameter among the environmental factors influencing tropical cyclone formation(Gray, 1979;Emanuel and Nolan, 2004).

关键词： tropical cyclone ocean

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Two-dimensional semiconductor heterostructures for photocatalytic CO_(2)conversion

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Science China Chemistry 2024年第8期67卷 2434-2447页

作者： Yang wu Mingyu wu Yongfu Sun Yi Xie Hefei National Research Center for Physical Sciences at Microscale University of Science and Technology of ChinaHefei 230026China

The CO_(2)reduction into carbon-contained fuel via solar energy offers the powerful tools to realize the zero-emission carbon *** to the intriguing features of the two-dimensional(2D)heterostructures,it is susceptible to modulate the electronic structure as well as the surface geometry for optimizing the photocatalytic CO_(2)*** this perspective,we surveyed the fundamental insights of 2D semiconductor heterostructures,involving the fabrication strategies and classification of the 2D semiconductor ***,we have detailly discussed the overview of 2D semiconductor heterostructure for optimizing CO_(2)photocatalytic influenced factors,including the solar energy utilization,photogenerated carriers separation,and redox reaction ***,we showed the significant advantages of 2D heterostructures in elevating CO_(2)photoreduction performance,focusing on activity,selectivity and *** analyzing the limitations and developments,we ended by putting forward insights into the further researches about the CO_(2)photocatalysts and reactor design,even industrial applications.

关键词： two-dimensional semiconductor heterostructures photocatalysis CO_(2)conversion

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