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The features of gravity field and deep structure in western part of the South Yellow Sea

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Chinese Science Bulletin 2000年第8期45卷 759-764页

作者： WANG Qianshen1 & AN Yulin1. institute of Geophysics, Chinese Academy of Sciences, beijing 100101, China 2. Chinese University of {2., beijing 100083, China institute of Geophysics Chinesc Academy of Sciences Beijing China Chinese University of geology Beijing China

The gravity data from the sea region to the west of 12.° E of the South Yellow Sea have been processed and the feature of gravity fields analyzed. An experience relationship formula on the filter wavelength and corresponding depth has been put forward. Combined with the geological and seismic data, the deep tectonic framework and structural characters as well as possible favourable prospecting district for hydrocarbon in the South Yellow Sea have been discussed and analyzed.

关键词： western part of the South Yellow Sea gravity field deep structure.

Carbon and Oxygen Stable Isotope Values and Microfossils at 4..4.4.5ka BP in Tai Co,Tibet,China,and Their Paleoclimatic Significance

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Acta Geologica Sinica(English Edition) 2011年第5期85卷 1036-1050+1052-1056+1051页

作者： ZHENG Mianping~(1,2.*),LIU Junying~(1,3),MA Zhibang~(1,4.,WANG Hailei~(1,2. and MA Nina~(1,2. 1 MLR Key Laboratory of Saline Lake Resources and Environment,institute of Mineral Resources,CAGS, {4. 100037,China 2.Research and Development Center for Saline Lakes and Epithermal Deposits,Chinese Academy of Geological Sciences,{4. 100037,China 3 institute of {4.,Chinese Academy of Geological Sciences,{4. 100037,China 4.Key Laboratory of Cenozoic {4. and Environment,Chinese Academy of Sciences,{4. 10002., China MLR Key Laboratory of Saline Lake Resources and Environment Institute of Mineral Resources CAGS Beijing 100037 China Research and Development Center for Saline Lakes and Epithermal Deposits Chinese Academy of Geological Sciences Beijing 100037 China institute of geology Chinese Academy of Geological Sciences Beijing 100037 China Key Laboratory of Cenozoic geology and Environment Chinese Academy of Sciences Beijing 100029 China *Correspondence: Mianping ZHENG *Correspondence: Corresponding author. E-mail: zhengmp2010@***

Two sedimentary sections were measured at Tai Co(Co means lake in Tibetan) in western Tibet,*** two sections are almost all composed of clay carbonate beds except in their lower parts where there are carbonized plants at>10 cm depths and dark-colored carbonate clay and clay at 50-70 cm depths,yielding abundant gastropods,ostracods,and *** carbon and oxygen stable isotope values of carbonate,ostracods,and charophytes and ecological features of microfossil communities indicate the following climatic change in the area from 4..4.to 4.5 ka BP:at 4..4.2..2.ka BP,the climate was relatively wet;at 2..2.2..5 ka BP,it was slightly warm-dry;at 2..5-2..5 ka BP,it was warm-wet;at 2..5-2..0 ka BP,it was slightly cold-wet;at 2..5-17.5 ka BP,it became cold abruptly and slightly wet,implying the climate of the last glacial maximum;at 17.5-16.0 ka BP,it was slightly cold-dry;at 16.0-11.8 ka BP,it was slightly warm-wet;at 11.8-10.4.ka BP,it was relatively cold-dry, roughly equivalent to the climate of the Younger Dryas,and at 10.4.ka BP,the temperatures began to rise again;at 10.4.9.4.ka BP,it was slightly warm-wet;at 9.4.8.5 ka BP,there occurred short warm-wet oscillations;at 8.5-7.9 ka BP,it was slightly dry-cold,representing a strong temperature-lowering and drying event in the postglacial stage;at 7.8-6.3 ka BP,it was slightly warm-wet;at 6.3-4.5 ka BP,the climate tended to be cold-dry.4.5 ka BP recorded the maximum aridity since the late part of the late Pleistocene.

关键词： sedimentary environment index paleoclimatic changes late Pleistocene-Holocene(4..4.4.5 ka BP) Tai Co Tibet

National 2.00' GPS control network of China

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Progress in Natural Science:Materials International 2007年第8期17卷 983-987页

作者： Yang Yuanxi~(1**) Tang Yingzhe~1 Chen Chuanlu~2.Wang Min~3 Zhang Peng~4.Wang Xiaorui~2.Song Lijie~5 Zhang Zusheng~6 (1.Xi'an Research institute of Surveying and Mapping,Xi'an 710054.China 2.Geodetic Data Processing Center,Xi'an 710054.China 3.Center of Earthquake Analysis and Prediction,China {4. {2.,beijing 100036,China 4.National Geomatics Center of China,beijing 10004.,China 5.institute of Surveying and Mapping,Zhengzhou University of Information Engineering,Zhengzhou 4.0052.China 6.First Crustal Deformation Monitoring Center,China {4. {2.,Tianjin 300180,China) [a]Xi' an Research institute of Surveying and Mapping Xi' an China [b]Geodetic Data Processing Center Xi'an China [c]Center of Earthquake Analysis and Prediction China Seismological Bureau Beijing China [d]National Geomatics Center of Chinna Beijing China [e]institute of Surveying and Mapping Zhengzhou University of Information Engineering Zhengzhou China [f]First Crustal Deformation Monitoring Center China Seimological Bureau Tianjin China

An accurately unified national GPS network with more than 2.00 stations,named"National 2.00' GPS Control Net- work",signed the epoch 2.00.0,has been established by integrating the existing six nationwide GPS networks of China set up by differ- ent departments with different *** paper presents the characteristics of the existing GPS networks,summarizes the strategies in the integrated adjustment of the GPS network,including functional model,stochastic model as well as the adjustment principle modifi- *** modifying the adjustment strategies according to the characteristics of the existing GPS networks and under the support of the IGS stations,the accuracy of the integrated national GPS network is greatly *** datum differences among the sub networks disappear,the systematic error influences are weakened,and the effects of the outliers on the estimated coordinates and their variances are *** is shown that the average standard deviation for the horizontal component is smaller than 1.0 cm,the vertical component is smaller than 2.0 cm,and the three-dimensional (3-D) position of geocenter coordinates is smaller than 3.0 *** exterior checking ac- curacy for the 3-D position is averagely better than 1.0 cm.

关键词： GPS control network adjustment systematic errors robust estimation variance component estimation coordinate system

Summary of the Lithospheric Dynamics in China

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Acta Geologica Sinica(English Edition) 1987年第2期 15-29页

作者： Ma Xingyuan institute of geology, State {2. bureau, {4.

This paper presents a summary of the explanatory notes for the 1: 4. 000.000 scale"Lithgspheric Dynamics Map of China and Adjacent Seas". Which gives an outline of the geological and geophysical processes that are presently active or were once active during the Cenozoic. The focus is concentrated on intraplate phenomena and on explaining them in terms of fundamental plate tectonic *** lithosphere in China is very heterogeneous. Its dynamics can be described in terms of the relative motions of 8 active subplates and related 17 tectonic blocks, and the characteristics of neotectonic deformation. The present-day movement and deformation of the lithosphere in China, their relationship with the deep-seated processes, and the lateral heterogeneity, mass difference and stress state within it that will tend to cause crustal movement in the future are *** intraplate tectonics and stress field are mainly controlled by the heterogeneity of the lithosphere and the mode of interaction between subplates and their boundary conditions. The collision of the Indian plate with the Eurasian plate began and proceeded along the Tethys ocean side, which has produced a strong compressional stress in western China and brought about a high shear stress in the regions round the eastern and western corners of the Himalaya block. However, the eastern part of China is directly influenced by the western Pacific plate boundaries. The minimum principal stress here is tensional. which makes the shear stress high, it may be the cause of the high seismicity in North China and maritime region of southeastern China.

关键词： Summary of the Lithospheric Dynamics in China

Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean

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Chinese Science Bulletin 2003年第B06期48卷 106-110页

作者： LIU Jihua~(1,2.3), CHEN Lirong~1, WANG Yingxi~4.& HAN Jianxiu~5 1. institute of Oceanology, Chinese Acadcmy of ences, Qingdao 2.6071. China 2. Key Lab of Marine Sedimentology and Environmental {4., First institute of Oceanograpgy, State Oceanic Administration, Qingdao 2.6061. China 3. Graduate School, Chinese Academy of Sciences, beijing 100039. China 4. Modern Analysis Center, Nanjing University. Nanjing 2.0093. China 5. Guangzhou Marine Investigation {4., Guangzhou 510760. China 1. institute of Oceanology Chinese Academy of Sciences 266071 Qingdao China 2. Key Lab of Marine Sedimentology and Environmental geology First Institute of Oceanograpgy State Oceanic Administration 266061 Qingdao China 3. Graduate School Chinese Academy of Sciences 100039 Beijing China 4. Modern Analysis Center Nanjing University 210093 Nanjing China 5. Guangzhou Marine Investigation bureau 510760 Guangzhou China

Fifty-six samples of nannofossil ooze were collected from Core PC5794.in the northern equatorial Pacific at 5 cm intervals. With the methods of mass spectrometer (VG354. and ICP, the Nd isotopic compositions (εNd(t)), Mn contents and Mg/Sr ratios of carbonate phase have been analyzed. CaCO3 contents of bulk sediments were obtained by dissolution of 0.5 mol/L HCl. Based on these data, the high-resolution εNd(t) profile of seawater in early Miocene with core depth(or time) have been established. The values of εNd(t) range from -6.2.to -2.97 and 4.fluctuation cycles existed during 2..06-2..02.Ma. 4.low εNd(t) values (about -6.4. correspond to high CaCO3 contents, which implicates that there were 4.cold epochs or 4.times of Antarctic Bottom Water activity. They occurred at the time of 2..06 Ma, 2..85 Ma,2..88 Ma and 2..2. Ma, respectively. High εNd(t) values correspond to the high Mn contents and high values of Mg/Sr ratio, which indicates the existence of 4.intense hydrothermal activity periods during 2..06-2. Ma, the durations of them are 4.05-2..98 Ma, 2..69-2..15 Ma, 2..74.2..37 Ma and 2..06-2..02.Ma, respectively.

关键词：同位素钕示踪原子海水演化中新世太平洋微化石分光计持续期海水样品

Control of atmospheric CO_2.concentrations by 2.50: A calculation on the emission rights of different countries

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Science China Earth Sciences 2009年第10期52卷 1447-1469页

作者： DING ZhongLi1, DUAN XiaoNan2. GE QuanSheng3 & ZHANG ZhiQiang4.1 institute of geology and Geophysics, Chinese Academy of Sciences,{2., China 2.The General Office of Chinese Academy of Sciences, beijing 100864. China 3 institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, beijing 100101, China 4.The Lanzhou Branch of the National Science Library, the Scientific Information Center for Resources and Environment, Lanzhou 730000, China institute of geology and Geophysics Chinese Academy of Sciences Beijing 100029 China The General Office of Chinese Academy of Sciences Beijing 100864 China institute of Geographic Sciences and Natural Resources Research Chinese Academy

This paper is to provide quantitative data on some critical issues in anticipation of the forthcoming international negotiations in Denmark on the control of atmospheric CO2.concentrations. Instead of letting only a small number of countries dominate a few controversial dialogues about emissions reductions, a comprehensive global system must be established based on emissions allowances for different countries, to realize the long-term goal of controlling global atmospheric CO2.concentrations. That a system rooted in "cumulative emissions per capita," the best conception of the "common but differentiated responsibilities" principle affirmed by the Kyoto Protocol according to fundamental standards of fairness and justice, was demonstrated. Based on calculations of various countries' cumulative emissions per capita, estimates of their cumulative emissions from 1900 to 2.05, and their annual emissions allowances into the future (2.06―2.50), a 4.0 ppmv atmospheric CO2.concentration target was set. According to the following four objective indicators―total emissions allowance from 1900 to 2.50, actual emissions from 1900 to 2.05, emissions levels in 2.05, and the average growth rate of emissions from 1996 to 2.05―all countries and regions whose population was more than 300000 in 2.05 were divided into four main groups: countries with emissions deficits, countries and regions needing to reduce their gross emissions, countries and regions needing to reduce their emissions growth rates, and countries that can maintain the current emissions growth rates. Based on this proposal, most G8 countries by 2.05 had already expended their 2.50 emissions allowances. The accu-mulated financial value based on emissions has reached more than 5.5 trillion US dollars (2. dollars per ton of CO2.. Even if these countries could achieve their ambitious emissions reduction targets in the future, their per capita emissions from 2.06 to 2.50 would still be much higher than those of developing coun

关键词： international negotiations on climate change cumulative emissions per capita emission allowance

PRELIMINARY STUDY ON THE CONDUCTIVITY STRUCTURE OF THE CRUST AND UPPER MANTLE: THIRD REPORT ON THE GEOSCIENCE TRANSECT FROM XIANGSHUI, JIANGSU, TO MANDAL, NEI MONGOL

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地震地质 1990年第3期 200-206页

作者： Jiang Zhao, Sun Jie, Xu Chang-fang Wang Ji-jun and Shi Shu-lin (institute of geology, State {2. bureau,{4.)

The features of deep conductivity structure along Xiangshui-Mandal Geoscience Transect are described in this paper basing on newly obtained magnetotelluric data. Large resistivity contrasts can be found on both borders of North China platform. The depth of the crustal high conductivity layer changes abruptly from 2. km to 34.km beneath Nei Mongol fold system on the northwestern end of the transect. While it is absent beneath Subei-Jiaonan terrane on the southeastern end of the transect, where two high conductivity layers are detected in the upper mantle. The crustal high conductivity layer is well developed in the Cenozoic basins within North China Platform with a relatively shallow depth. The depth of the upper mantle high conductivity layer along the transect ranges from 60 to 12. kin, with a general tendancy of decreasing in depth from northwest to southeast, forming local uplifts beneath Ho-Bao basin, Central Hebei depression and Tan-Lu fault zone. It reflects the characteristics of the regional geo

关键词： Geoscience Transect Magnetotelluric measurements High conductivity layer Conductivity structure Jiangsu Nei Mongol

Co-seismic ground deformation and source parameters of Mani M7.9 earthquake inferred from spaceborne D-InSAR observation data

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Science China Earth Sciences 2004年第6期47卷 481-488页

作者： SHAN Xinjian1,MA Jin1,WANG Changlin2.LIU Jiahang1,SONG Xiaoyu1 & ZHANG Guifang1 1.institute of geology and Laboratory of Tectonophysics,China {2. {4.,{4. 10002.,China 2.institute of Remote Sensing Application,Chinese Academy of Sciences,{4. 100101,China 1. institute of geology and Laboratory of Tectonophysics China Seismological Bureau 100029 Beijing China 2. institute of Remote Sensing Application Chinese Academy of Sciences 100101 Beijing China

We obtain the co-seismic ground deformation field of the Mani M7.9 earthquake on November 8, 1997 through three-pass differential interferometric processing. Then we get the geometric and kinematics parameters of this event by the elastic half-space model and forward modeling with the InSAR data. The following results have been obtained: (i) The deformation fields on both sides of the seismogenic fault are affected by the co-seismic deformation field even in 110 km away from the fault. The loss of phase coherence belt caused by the zone of ground rupture crosses the image from east to west with a length of an area 110 km. (ii) The maximum horizontal displacement caused by the earthquake reaches 7.96 m. (iii) The earthquake fault can be divided into four parts, and the deformation field of the middle two parts is bigger than that of the other two, with lengths of 2. km and 37 km, respectively. And their average sliding values on the rupture surface are 6500 mm and 6000 mm, respectively, and their depths both are 35 km. The segment of 2. km length is the major rupture surface of this earthquake. The west part and the east part of the fault have lengths of 2. km and 2. km, respectively. The sliding value of the west one is 4.00 mm and that of the east one is 5800 mm. They extend to depths of 2. km and 18 km, respectively.

关键词： D-InSAR, surface deformation field in sight direction, Mani earthquake, characteristics of earthquake fault.

Principles and methods of quantitative analysis on b-axis disorder in 2.: 1 dioctahedral phyllosilicate

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Chinese Science Bulletin 1997年第22期42卷 1908-1912页

作者： WANG Ling and ZHANG Zhenyu1. Changsha institute of Geotectonics, Chinese Academy of Sciences, Changsha 4.0013, China 2. institute of geology, Chinese Academy of Sciences,{2., China Changsha institute of Geotectonics Chinese Academy of Sciences Changsha China institute of geology Chinese Academy of Sciences Beijing China

IN XRD patterns of clay minerals, a phenomenon that strong peaks often have (00l) and(hkl) (k=3n) indices and show symmetric figures can be seen commonly, while a minorityof reflection peaks (hkl) (k≠3n) are comparat... 详细信息

关键词： b-axis disorder pyrophvllile 2 phyllosilicate clay minerals dioctahedral minerals orientating structure of hy-droxyls crystal structure analysis DTA-TG.