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中国科学院地质与地球物理研究所2004学术年会

作者： wang fei~(a,*),li hongchun~b,zhu rixiang~a,qin feizhou~c a institute of geology and geophysics.chinese academy of sciences.beijing 100029.china b department of earth sciences.university of southern california.los angeles.ca 90089-074..usa c department of physics and information.university of ningxia.yinchuan 750021.china

Dating deposits in caves formed by rivers may yield insight into rates and processes of bedrock *** cave passages at different levels have developed in the walls of the Qianyou River valley in the qinling mountains,south of the city of Xian,*** speleothem samples near the position of palaeowater tables in three cave passages are dated by the 230Th dating method The results show that the river cut down at the rate of 0.23±0.02 mm/yr from 358,000±38,000 to 247,000±28,000 yr ago,0.19±0.03 mm/yr from 247,000±28,000 to 118.000±19,000 yr ago,and 0.51±0.08 mm/yr from 118.000±19,000 yr ago until *** fall very close to the glacialinterglacial transition following marine oxygen isotope stages 10,8,and 6,*** increase in downcutting rates during the interglacial period is consistent with warm,wet weather,increasing rates of *** may lead us toward an underlying mechanism for modulating incision that is not in a direct response to the presence of headwater glaciers,

关键词： Qianyou River Speleothem qinling mountains china

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Palaeomagnetism and 40Ar/39Ar age from a cretaceous volcanic sequence,Inner Mongolia,china:Implications for the field variation during the cretaceous normal superchron

Palaeomagnetism and 40Ar/39Ar age from a Cretaceous volcanic...

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中国科学院地质与地球物理研究所2008学术年会

作者： rixiang zhu~(a,*),Yongxin Pan~(a,b),Huaiyu He~(a,b),Huafeng qin~a,Shoumai Ren~c a Palaeomagnetism and Geochronology Laboratory(SKL-LE),institute of geology and geophysics.chinese academy of sciences.beijing 100029.china b Key Laboratory of the earth’s Deep Interior,institute of geology and geophysics.chinese academy of sciences.beijing 100029.china c Strategic Research centre of Oil and Gas Resources,Ministry of Land and Resources,beijing 100034,china

An integrated palaeomagnetic and Ar/ Ar dating study was carried out on an Early cretaceous volcanic lava sequence from the Suhongtu section,Inner Mongolia,to determine the field behavior within the cretaceous normal superchron(cNS).Ar/ Ar ages were obtained from 12 lava flows,indicating that the studied lava was formed around 114.1±0.3 Ma for the lower interval and 110.6±0.1 Ma for the upper ***-magnetic experiments and electron microprobe analyses indicate that the primary Fe-Ti oxides are the main magnetic *** lava flows carry normal palaeomagnetic directions,which can be grouped into 31 units by an F-test,with a Fisher mean characteristic remanent magnetization(chRM) of D/I= 12.8/58.6°(α = 2.3°).The corresponding palaeomagnetic pole is located at 80.3°N and 200.3°E (A = 3.2°,K=64.4),which is indistinguishable at the 95%confidence level from the Eurasia pole derived from the apparent polar wander path for the early *** a modified Thellier palaeointen-sity method with stringent acceptance criteria,we obtained two time-series of palaeointensity records from 15 independent palaeomagnetic units(total 136 samples).The virtual dipole moment(VDM) values varied from 2.53×10 Am to 9.92×10 *** mean VDMs for the upper and lower intervals are (5.38±2.06)×10 Am and(4.61±2.67)×10 Am,*** observed time-series of palaeointensity, together with the previously available data for the cNS,suggest that magnetic field strength during the cNS fluctuated significantly with time.

关键词： Palaeointensity cretaceous normal superchron 40Ar/39Ar dating Inner Mongolia

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Identifying the origin of the magnetic directional anomalies recorded in the Datong loess profile,northeastern chinese loess plateau

Identifying the origin of the magnetic directional anomalies...

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中国科学院地质与地球物理研究所2006学术年会

作者： rixiang zhu,~1 qingsong liu,~(1,2) Yongxin Pan,~1 chenglong Deng,~1 Jimin Sun~1 1 Palaeomagnetism and Geochronology Laboratory(SKL-LE),institute of geology and geophysics.chinese academy of sciences.beijing 100029.china 2 department of earth sciences.university of california at Santa cruz,ca 95064,usa

To better understand the origin of short-term features of palaeomagnetic signals recorded by the chinese loess,detailed palaeomagnetic and magnetic fabric studies were conducted on a loess profile at Datong,the northeastern margin of the loess plateau,which is characterized by both high sedimentation rate(□18 cm ka-1) and variations of sedimentary *** appears that the magnetic fabrics,specifically the inclination of the maximum magnetic susceptibility principal axis(K1-Inc),are robust means to identify the deposition *** results(cord four palaeodirectional anomalies(referred as A-D). Among them,anomaly c with relatively normal fabrics can be correlated to the Laschamp(□40 ka) *** contrast,anomalies A,b and D accompanying with Kl-Inc anomalies,are interpreted to be caused by post-depositional *** new results improve our understanding of the origins of the natural remanent magnetization recorded by the chinese loess.

关键词： chinese loess geomagnetic excursions magnetic fabrics

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TSR origin of sulfur in Permian and Triassic reservoir bitumen,East Sichuan basin,china

TSR origin of sulfur in Permian and Triassic reservoir bitum...

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中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： chunfang cai~(a,b,*),Kaikai li~b,Yangming zhu~c,Lei Xiang~b,Lei Jiang~b,Tenger~d,Xunyu cai~e,liuLu cai~b a State Key Lab of lithospheric Evolution,institute of geology and geophysics.chinese academy of sciences.beijing 100029.china b Key Lab of Petroleum Resources Research,institute of geology and geophysics.chinese academy of sciences.beijing 100029.china cdepartment of earth sciences,Zhejiang university,Houzhou 310027,china d institute of Petroleum Exploration and Development,cENOPEc,Wuxi,Jiansu Province,china e Oilfield department,cENOPEc,beijing 100029.china

Solid bitumen,HS,pyrite and anhydrite samples from the Lower Triassic feixianguan Formation and Upper Permian changxing Formation,and source rock kerogen samples from the cambrian,Ordovician, Silurian and Permian in the East Sichuan basin were analyzed for their sulfur content andδS values,to determine if the measurements were consistent with a thermochemical sulfate reduction(TSR) origin of the produced HS and solid *** results show that the solid bitumen samples have sulfur contents from 2.6 to 12.5 wt.%andδS values from +13.4‰to +22.1‰.TheδS values are significantly heavier than those of potential Upper Permian source rock kerogens that average +1.3‰(n = 3),suggesting that most of the sulfur in the solid bitumen is derived from isotopically heavy HS of TSR origin (from+12.0‰to+13.7‰).Interestingly,two gases produced from gas to water transition zones during drill stem testing(DST) show significantly lighterδS values(+3.3‰and +4.1‰) than the HS from gas-producing *** isotopically light HS may be genetically linked to fracture-filling isotopically heavy anhydrite withδS values from +38.5‰to +39.6‰,which are significantly heavier than those of coeval seawater sulfate(+11.8‰to+21.7‰) as measured for bedded *** link may have resulted from reduction of part of the dissolved sulfate by hydrocarbons under sulfate-limited conditions. Source rock kerogens show a secular change inδS values relative to source rock age.A dramatic decrease and then increase inδS was found toward the Permian/Triassic boundary for the first time in the East Sichuan basin.

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Phytoliths as quantitative indicators for the reconstruction of past environmental conditions in china I:phytolith-based transfer functions

Phytoliths as quantitative indicators for the reconstruction...

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中国科学院地质与地球物理研究所2006学术年会

作者： Hou-Yuan Lu~(a,b,),Nai-qin Wu~a,Xiang-Dong Yang~c,Hui Jiang~(d,e),Kam-biu liu~f,Tung-Sheng liu~a a institute of geology and geophysics.chinese academy of sciences.beijing 100029.china b institute of Tibetan Plateau Research,chinese academy of sciences.beijing 100085,china c Nanjing institute of Geography and limnology,chinese academy of sciences,Nanjing 210008,china d department of earth sciences.university of Aarhus,DK-8000 Aarhus c,Denmark e Laboratory of Geographic information Science,East china Normal university,200062 Shanghai,china f department of Geography and Anthropology,Louisiana State university,baton Rouge,LA 70803,usa

This study investigated the distribution of phytolith assemblages in china from surface soil samples at 243 sites along significant ecological and climatic gradients to develop transfer functions for quantitative reconstruction of *** correspondence analysis(cca) and detrended correspondence analysis(Dca) were used to determine the main environmental variables influencing phytolith *** results reveal that mean annual precipitation(MAP) is the dominant variable controlling the spatial distribution of phytoliths, which accounts for 39%of the total *** annual temperature(MAT),relative humidity (Humi),and annual evaporation(VAP) are another three significant variables,accounting for 6%, 10%,and 5%respectively of the total variance in phytolith *** functions,based on WA-PLS(weighted averaging plus partial least squares),were developed for MAP(R= 0.90,root-mean-square-error of prediction(RMSEP)=148 mm),MAT(R=0.84,RMSEP= 2.52℃),Humi(R=0.75,RMSEP=6.36%) and VAP(R=0.59,RMSEP=327 mm). Overall,our results confirm that phytoliths can provide reliable and robust estimates of MAP, MAT,Humi and ***,WA-PLS is a robust calibration method for quantitative palaeoenvironmental reconstruction based on phytolith data.

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Rare earth elements of aeolian deposits in Northern china and their implications for determining the provenance of dust storms in beijing

Rare earth elements of aeolian deposits in Northern China an...

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中国科学院地质与地球物理研究所2007学术年会

作者： Xiaoping Yang~(a,*),Yongsheng liu~(a,1),chaozhu li~(a,2), Yuling Song~b,Heping zhu~a,Xindi Jin~a a institute of geology and geophysics.chinese academy of sciences.beijing,china b department of physics and information Technology,ningxia Normal college,Guyuan,china 1 Present affiliation:china institute of Geoenvironment Monitoring, beijing. 2 Present affiliation:institute of Geomechanics,chinese academy of Geological sciences.beijing.

This paper contributes to a better understanding of the source of dust storms in northern china and the relationship between these sources and other aeolian sediments in this *** samples in potential source areas were collected from the Hunshandake Sandy Land,Heaven Desert,the loess deposits of the bashang area,the mountainous basins and valleys north of beijing and from the badain Jaran Desert and Hulunbaier Sandy Land(Fig.1).Dust samples were collected in beijing during two dust storms in March 2002 and April *** laboratory methods used in this study included measurements of abundance of trace elements,in particular the rare earth elements(REEs),mineral assemblages and grain *** REE contents,Eu and ce anomalies show clear differences between various *** is considered to be the key factor influencing REE patterns in the study *** REE abundances and patterns indicate that the aeolian sand north of beijing,such as in the Heaven Desert, is mainly of local origin rather than from desert encroachment from the *** mineral grains carried in dust storms,however, are highly mixed,and may come partly from local sources but mainly from distant desert regions in western china.

关键词： Sandy land Dust storm Rare earth element(REE) Loess Northern china

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A Tectonic Escape Model for the Formation of Sedimentary basins in the Yangzhou block of theLower Yangtze Region,Eastern china

A Tectonic Escape Model for the Formation of Sedimentary Bas...

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中国科学院地质与地球物理研究所2002学术年会

作者： Y.J.Shang~a,Z.Q.Yue~b,b.D.Xia~c,G.H.li~a a Engineering Geomechanics Laboratory,institute of geology and geophysics, chinese academy of sciences.beijing 100029,P.R.china b department of civil Engineering.The university of Hong Kong,Hong Kong,P.R.china c department of earth sciences,Nanjing university,Nanjing 210008,P.R.china

This paper presents a tectonic escape model for the formation of sedimentary basins in the Yangzhou block of the Lower Yangtze Region,Eastern *** sedimentary basins are identified in which the Pukou Formation of the Upper cretaceous has been *** south to north,the nine sedimentary basins are named:wangjing,Qiangshan,Wuwei,Nanxuan, changzhou,Jurong,Nanjing,Quanjiao and Subei *** form a wedge-shape fragment(the Yangzhou block) occupying an area of 100,000 km in the Lower Yangtze *** two side boundaries of the Yangzhou block are the strike-slip Tanlu Fault and the strike-slip Quangjiao-Xiangshui Fault on the northwest and the strike-slip qingyang-Nantong Fault on the *** wide end of the wedge faces the southern Yellow Sea in the northeast and the narrow end contacts the Dabie block in the southwest. During the Early Mesozoic,collision between the Yangtze block and the North china block resulted in the formation of the qinling-Dabie Orogenic belt and caused the Lower Yangtze Region to become a foreland basin with many strike-slip *** the Late Mesozoic,wide spread extension in Eastern china and shortening in qin-ling/Dabie Shan and in the Huaying Shan region resulted following establishment of an Andean-type arc margin to the east of the southern Yellow Sea area,when"Greater Japan"collided with ***,the wedge-shaped Yangzhou block escaped tectonically toward the northeast and formed distinctive geological features in nine sedimentary basins during Pukou time in the Late *** geological features are reflected in basin spatial distributions,basin geometries,sedimentary facies,sediment thicknesses, sedimentary environments,and the petrology of fanglomerates and *** basins are part of a large population of arc-crestal rifts formed on top of that Andean arc. The proposed tectonic escape model could be useful in petroleum exploration and mining in the region.

关键词： Late cretaceous Sedimentary basins Strike-slip fault Tectonic escape Lower Yangtze Region

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A nonlinear dynamical model of landslide evolution

A nonlinear dynamical model of landslide evolution

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中国科学院地质与地球物理研究所2002学术年会

作者： Siqing qin~a,Jiu Jimmy Jiao~b,Sijing wang~a a Engineering Geomechanics Laboratory.,institute of geology and geophysics.chinese academy of sciences,P.O. box 9825,beijing 100029,People’s Republic of china b department of earth sciences,The university of Hong Kong,Pokfulam Road,Hong Kong,People’s Republic of china

A nonlinear dynamical model for the evolution of landslide is *** parameters of this model are obtained through an improved iterative algorithm of inversion developed in the *** on the nonlinear dynamical model and nonlinear dynamical systems (NDS) theory,the approaches to determining the Lyapunov exponents,the predictable time scale and the stability criterion of the evolutional state of landslide are given.A case study of the Xintan slope is presented to illustrate the capability and merit of the nonlinear dynamical model.

关键词： Nonlinear dynamics chaos Predictable timescale Landslide

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Major types,characteristics and geodynamic mechanism of Upper Paleozoic copper deposits in northern Xinjiang,northwestern china

Major types,characteristics and geodynamic mechanism of Uppe...

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中国科学院地质与地球物理研究所2006学术年会

作者： chunming Han~a,Wenjiao Xiao~3,Guochun Zhao~b,Jingwen Mao~c,Sanzhong li~d, Zhen Yan~a,Qigui Mao~a a State Key Laboratory of lithospheric Evolution,institute of geology and geophysics.chinese academy of sciences.beijing 100029,P.R.china b department of earth sciences,The university of Hong Kong,Pokfulam Road,Hong Kong,china c institute of Mineral Deposits,chinese academy of Geological sciences,26 baiwanzhuang Road,beijing, 100037,P.R.china d college of Marine Geosciences,Ocean university of china,qingdao 266003,Shangdong,P.R.china

Syn- and post-orogenic cu mineralization in the northern Xinjiang Paleozoic accretionary and collisional orogenic belt in northwestern china is of great economic interest. About 40 cu-bearing deposits have been discovered in the area,making it one of the most important metallogenic belts in *** to their host rocks,these deposits can be classified into four principal types:(1) volcanic-hosted massive sulfide cu-Pb-Zn deposits;(2) porphyry cu-Mo-(Au) deposits;(3) magmatic cu-Ni sulfide deposits;and(4) cu-Mo-Au-Ag skarn ***,the development of these Upper Paleozoic deposits was closely associated with subduction and collision of the ancient Asian Ocean between the Siberian block and the Tarim *** important metallogenic epoch involving formation of cu-Pb-Zn-polymetallic deposits formed during southwestern rollback and associated slab-detachment during Devonian time(400-370 Ma).In southern Altay,southwestern-direct rollback and associated slab-detachment occurred during the Devonian(400-370 Ma),in response to later collision at the accreted continetal margin[Xiao,W.J.,Windley,b.F.,badarch,G.,Sun,S., li,J.L.,qin,K.Z.,wang,Z.H.,*** accretionary and convergent tectonics of the southern Altaids:implications for the lateral growth of central *** of the Geological Society of London 161,339-342],during which the Ashele cu-Pb-Zn and Keketale Pb-Zn deposits *** led to the accretion of the Junggar Ocean arc system in the Middle *** the Lower to Middle carboniferous,north-dipping subduction beneath the Dananhu arc triggered the emplacement of granitic porphyries in the Tousuquan and Dananhu island arc belt in the east Tianshan,leading to the formation of the Tuwu and Yandong porphyry cu-Mo-Au-Ag *** the Upper carboniferous to Lower Permian,large mafic-ultramafic complexes were emplaced during closure of the ancient Tianshan Ocean,resulting in the formation of several magmatic cu-Ni sulfide deposi

关键词： copper deposits Metallogenic belts Tectonic setting Xinjiang china

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Emerging contaminants:A One Health perspective

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The Innovation 2024年第4期5卷 140-170,139页

作者： Fang wang Leilei Xiang Kelvin Sze-Yin Leung Martin Elsner Ying Zhang Yuming Guo bo Pan Hongwen Sun Taicheng An Guangguo Ying bryan Wbrooks Deyi Hou Damian EHelbling Jianqiang Sun Hao Qiu Timothy MVogel Wei Zhang Yanzheng Gao Myrna JSimpson Yi Luo Scott Xchang Guanyong Su bryan MWong Tzung-May Fu Dong zhu Karl JJobst chengjun Ge Frederic coulon Jean Damascene Harindintwali Xiankui Zeng Haijun wang Yuhao Fu Zhong Wei Rainer Lohmann changer chen Yang Song concepcion Sanchez-cid Yu wang Ali El-Naggar Yiming Yao Yanran Huang Japhet cheuk-Fung Law chenggang Gu Huizhong Shen Yanpeng Gao chao qin Hao li Tong Zhang Natàlia corcoll Min liu Daniel SAlessi Hui li Kristian Kbrandt Yolanda Pico cheng Gu Jianhua Guo Jianqiang Su Philippe corvini Mao Ye Teresa Rocha-Santos Huan He Yi Yang Meiping Tong Weina Zhang Fidèle Suanon Ferdi brahushi Zhenyu wang Syed AHashsham Marko Virta qingbin Yuan Gaofei Jiang Louis A.Tremblay qingwei bu Jichun Wu Willie Peijnenburg Edward Topp Xinde cao Xin Jiang Minghui Zheng Taolin Zhang Yongming Luo lizhong zhu Xiangdong li Damiàbarceló Jianmin chen baoshan Xing Wulf Amelung Zongwei cai Ravi Naidu Qirong Shen Janusz Pawliszyn Yong-guan zhu Andreas Schaeffer Matthias c.Rillig Fengchang Wu Gang Yu James M.Tiedje State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China university of chinese academy of sciences Beijing 100049China department of chemistry Hong Kong Baptist UniversityHong KongChina HKbU institute of Research and continuing Education Shenzhen Virtual University ParkShenzhenChina Technical university of Munich TUM School of Natural SciencesInstitute of Hydrochemistry85748 GarchingGermany School of Resources&Environment Northeast Agricultural UniversityHarbin 150030China climate Air Quality Research UnitSchool of Public Health and Preventive MedicineMonash UniversityMelbourneVICAustralia Faculty of Environmental Science&Engineering Kunming University of Science&TechnologyKunming 650500China Ministry of Education Key Laboratory of Pollution Processes and Environmental criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Guangdong Key Laboratory of Environmental catalysis and Health Risk control School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Ministry of Education Key Laboratory of Environmental Theoretical chemistry South China Normal UniversityGuangzhouGuangdong 510006China department of Environmental Science Baylor UniversityWacoTXUSA center for Reservoir and Aquatic Systems Research(cRASR) Baylor UniversityWacoTXUSA School of Environment Tsinghua UniversityBeijing 100084China School of civil and Environmental Engineering Cornell UniversityIthacaNY 14853USA Key Laboratory of Microbial Technology for Industrial Pollution control of Zhejiang Province Zhejiang University of TechnologyHangzhou 310014China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Laboratoire d’Ecologie Microbienne Universite Claude Bernard Lyon 1UMR CNRS 5557UMR INRAE 1418VetAgro Sup69622 VilleurbanneFrance department of Pla

Environmental pollution is escalating due to rapid global development that often prioritizes human needs over planetary *** global efforts to mitigate legacy pollutants,the continuous introduction of new substances remains a major threat to both people and the *** response,global initiatives are focusing on risk assessment and regulation of emerging contaminants,as demonstrated by the ongoing efforts to establish the UN’s Intergovernmental Science-Policy Panel on chemicals,Waste,and Pollution *** review identifies the sources and impacts of emerging contaminants on planetary health,emphasizing the importance of adopting a One Health *** for monitoring and addressing these pollutants are discussed,underscoring the need for robust and socially equitable environmental policies at both regional and international *** actions are needed to transition toward sustainable pollution management practices to safeguard our planet for future generations.

关键词： pollution planet contaminants

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