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DEFORMATION OF THE EASTERN HIMALAYAN SYNTAXIS: EVIDENCES FROM STRUCTURES AND KINEMATICS OF ITS WESTERN BOUNDARY

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地学前缘 2000年第S1期7卷 18-20页

作者： Zhang J.,Zhong D.,ding L.,Ji J.,He S(institute of geology and geophysics, chinese academy of sciences, beijing 100029,china)

The western boundary of the Eastern Himalayan Syntaxis (EHS) is a deformation belt up to 30km wide (Fig.1). Trending ca. N35°E, it separates the Gangdise magmatic belt in the west from the gneiss of EHS in the east. Its rock association, mica\|schist, quartzite, marble, and amphibolite, can be traced to the south to Gangdise belt and they were probably metamorphosed from the sediments along Yarlung Zangbo. This belt consists of several intensive deformation zones, the largest one of which is along the belt’s western margin from Dongjug to Mainling and we called this ca. 10km wide shear zone as the Dongjug\|Mainling shear zone (DMSZ).DMSZ experienced earlier ductile shear and later ductile\|brittle normal faulting. The earlier deformation produced mylonitic rocks. Their foliation trends N30°～40°E and dips northwest with the angle ranging from 55°to 80°, steepening northeastward. The penetrative kinematic lineation in the rocks has a varying attitude along the trend of DMSZ. It dips southwest with an angle of ca.35° in the southwest near Mainling, whereas dips northeast in the northeast. Moreover, the northeast dipping lineation steepens northeastwards, e.g., its angle ranges form 30° to 45° in the segment from Serkyim La to Dongjug but becomes 60～70° in the northeast most in another zone near Parlung. Kinematic indicators show that the motion of DMSZ had a left\|lateral slipping component, but the vertical motion components were different in the southwest from the northeast. From Serkyim La to the northeast, DMSZ had a kinematics of NW plate (Gangdise belt) thrusting over the SE plate (EHS) and its thrusting component increased toward northeast. However, the DMSZ has a vertical motion with the SE plate (EHS) as the uplifting plate.

关键词： Eastern Himalayan Syntaxis indentation uplift

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Pleistocene chemical weathering history of Asian arid and semi-arid regions recorded in loess deposits of china and Tajikistan

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Pleistocene chemical weathering history of Asian arid and se...

中国科学院地质与地球物理研究所2006学术年会

作者： Shiling Yang,Feng ding,and zhongli ding institute of geology and geophysics,chinese academy of sciences,beijing 100029,china

Quaternary loess-soil sequences in china and Tajikistan are valuable archives of the chemical weathering history for arid and semi-arid regions of *** development of new proxies independent of grain size are vital to reconstruct the long-term chemical weathering history of eolian *** this study,we analyze major elemental and Rb,Sr and Ba concentrations of decarbonated residue from representative loess and soil units along a north-south transect on the chinese Loess Plateau and compare these concentrations among different grain-size *** show that most of the elemental abundances and ratios vary considerably among different grain-size fractions for both loess and paieosols,indicating transport-driven compositional differentiation of minerals during subaerial ***, (CaO+NaO+MgO)/TiO ratios show little variation among different size fractions for the loess-soil ***-soil sequences at Lingtai(northern china) and Chashmanigar(southern Tajikistan) for the past 1.50-1.77 Ma show lower(CaO+NaO+MgO)/TiO ratios in soil units than in adjacent loess horizons,in good agreement with greater weathering intensity in soils than in loess ***(CaO+NaO+MgO)/TiO ratio of the decarbonated residue is therefore a reliable proxy for chemical weathering of loess deposits that is independent of grain *** (CaO+NaO+MgO)/TiO ratios of the Lingtai and Chashmanigar sections display a relatively regular oscillation within a narrow range in the early Pleistocene,and a rapid increase in average values and in variance from 0.85-0.6 Ma to the present,indicating lowered chemical weathering intensity in both the dust source regions and the depositional *** event may be causally related to the expansion of northern hemisphere ice and/or the regional tectonic uplift of high mountains in Asia since the mid-Pleistocene.

关键词： carbon isotopes of organic matter C3 and C4 plants loess precipitation seasonality climate zones Central Asia

Augmented reality registration algorithm based on nature feature recognition

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Science china(Information sciences) 2010年第8期53卷 1555-1565页

作者： CHEN jing 1 , WANG YongTian 1,2 , GUO JunWei 1 , LIU Wei 1 , LIN jingDun 1 , XUE Kang 1 , LIU Yue 1 & ding GangYi 31 School of Optoelectronics, beijing institute of Technology, beijing 100081, china 2 School of Computer Science and Technology, beijing institute of Technology, beijing 100081, china 3 School of Software, beijing institute of Technology, beijing 100081, china School of Optoelectronics Beijing Institute of Technology School of Computer Science and Technology Beijing Institute of Technology

This paper presents an improved key frame based augmented reality registration algorithm for real-time motion tracking in outdoor environment. In such applications, wide-baseline feature matching is a critical problem. In this paper, we apply randomized tree method to match key points extracted from the input image to those key frames as a classification problem. Extended Kalman filter is also utilized for jitter correction. A video see-through mobile augmented reality system is built for the on-site digital reconstruction of Yuanmingyuan Garden. Experimental results demonstrate that this algorithm is real-time, robust and effective for outdoor tracking.

关键词： outdoor augmented reality camera tracking randomized tree

Aeolian origin of the red earth in southeast china

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Aeolian origin of the red earth in southeast China

中国科学院地质与地球物理研究所2002学术年会

作者： SHANFA XIONG DONGCHUAI SUN and zhongli ding institute of geology and geophysics,chinese academy of sciences,100029 beijing,china

A clay-like deposit known as‘red earth’ is widely distributed over the terraces and high lands of the Yangtze River valley in southeast *** typical pedo-stratigraphical features have attracted the interest of pedologists and geologists for many years,although its origin is still *** we report an analyses of the grain-sie distributions,rare -earth element(ree) patterns and upper continental crust(UCC)-normalised major elemental composition of the red earth and compare them with those of the loess and other Aeolian deposits in northern *** results show that the red earth in southeast china has two or three end -member grain-size distributions,similar to the sedimentary characteristics and geochemical composition of Aeolian deposits found in northern *** with other evdence from field observations,these results suggest that the red earth is probably of Aeolian *** the basis of these data,we suggest that thick Aeolian dusts were also deposited in the wet subtropics and that the effect of the winter monsoonal winds upon the dust transport in eastern china was more important than previously *** 2002 John Wiley & Sons,Ltd.

关键词： red earth southeast china grain-size distribution REE pattern

GEOLOGICAL EVIDENCE OF MU US DESERT EVO-LUTION SINCE 0.5MAB.P.

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Scientia Geologica Sinica 1997年第1期 93-102页

作者： Sun Jimin, ding zhongli and Liu Tungsheng ( institute of geology, chinese academy of sciences, beijing 100029

ＧＥＯＬＯＧＩＣＡＬＥＶＩＤＥＮＣＥＯＦＭＵＵＳＤＥＳＥＲＴＶＯ－ＬＵＴＩＯＮＳＩＮＣＥ０．５ＭＡＢ．Ｐ．TXＧＥＯＬＯＧＩＣＡＬＥＶＩＤＥＮＣＥＯＦＭＵＵＳＤＥＳＥＲＴＥＶＯ┐ＬＵＴＩＯＮＳＩＮＣＥ０．５ＭＡＢ．Ｐ．... 详细信息

ＧＥＯＬＯＧＩＣＡＬＥＶＩＤＥＮＣＥＯＦＭＵＵＳＤＥＳＥＲＴＶＯ－ＬＵＴＩＯＮＳＩＮＣＥ０．５ＭＡＢ．Ｐ．TXＧＥＯＬＯＧＩＣＡＬＥＶＩＤＥＮＣＥＯＦＭＵＵＳＤＥＳＥＲＴＥＶＯ┐ＬＵＴＩＯＮＳＩＮＣＥ０．５ＭＡＢ．Ｐ．ＳｕｎＪｉｍｉｎ，ＤｉｎｇＺｈｏｎ...

关键词： MAB SINCE DESERT MU US EVO-LUTION

A TENTATIVE CORRELATION OF CLIMATE CHANGES BETWEEN CENTRAL china AND HIGH LATITUDE IN THE NORTH HEMISPHERE

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中国科学院大学学报 1999年第1期 72-80页

作者： Ren Janzhang (china Japan Friendship Center for Environmental Protection,beijing 100029) Liu Tungsheng ding zhongli Zhou Xiaoquan (institute of geology,chinese academy of sciences,beijing 100029) Quan Hao\ Di Yan (china Japan Friendship Center

１ＩｎｔｒｏｄｕｃｔｉｏｎＬｏｅｓｓｄｅｐｏｓｉｔｓａｒｅａｋｉｎｄｏｆｔｙｐｉｃａｌｔｅｒｒｅｓｔｒｉａｌｓｅｄｉｍｅｎｔｓｗｉｄｅｓｐｒｅａｄ，ｃｏｖｅｒｉｎｇａｂｏｕｔ１０ｐｅｒｃｅｎｔｏｆｌａｎｄｓｕｒｆａｃ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＬｏｅｓｓｄｅｐｏｓｉｔｓａｒｅａｋｉｎｄｏｆｔｙｐｉｃａｌｔｅｒｒｅｓｔｒｉａｌｓｅｄｉｍｅｎｔｓｗｉｄｅｓｐｒｅａｄ，ｃｏｖｅｒｉｎｇａｂｏｕｔ１０ｐｅｒｃｅｎｔｏｆｌａｎｄｓｕｒｆａｃｅｏｆｔｈｅＥａｒｔｈ．Ｔｈｅｍａ...

关键词： chinese loess greenland ice cap dust high frequent climate change

Solid-state NMR study of the stability of MOR framework aluminum

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chinese Journal of Structural Chemistry 2024年第4期43卷 7-14页

作者： Xinzhi ding Chong Liu jing Niu Nan Chen Shutao Xu Yingxu Wei Zhongmin Liu National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China University of chinese academy of sciences Beijing 100049China School of Chemistry Dalian University of TechnologyDalian116024China

MOR zeolite has been effectively utilized for dimethyl ether(DME)carbonylation reaction due to its unique pore structure and *** industrial production,the transformation of ammonium type MOR zeolite(NH_(4)-MOR)into proton type MOR zeolite(H-MOR)causes inevitable ***,understanding the influencing factors and dynamic evolution mechanism of zeolite dealumination is *** this work,the stability of framework aluminum was studied by X-ray diffraction(XRD),Fourier transform infrared(FT-IR)spectroscopy,^(29)Si,^(27)Al,^(1)H magic angle spinning nuclear magnetic resonance(MAS NMR),and DME carbonylation performance *** results indicate that extra-framework cation Na^(+)and NH_(4)^(+)could better preserve the aluminum structure of the MOR zeolite framework compared to H^(+),primarily due to the different'attraction'of the framework to ***,the impact of water on the zeolite framework aluminum at high temperature was studied by manipulating the humidity of the calcination atmosphere,revealing the formation of extra-framework six-coordinated aluminum(Al(Ⅵ)-EF)and the mechanism of water influence on the zeolite framework aluminum.

关键词： H-MOR Solid-state NMR H2O Framework aluminum stability Dealumination

Advance-retreat history of the East-Asian summer monsoon rainfall belt over northern china during the last two glacial-interglacial cycles

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Advance-retreat history of the East-Asian summer monsoon rai...

中国科学院地质与地球物理研究所2008学术年会

作者： Shiling Yang~*,zhongli ding Key Laboratory of Cenozoic geology and Environment,institute of geology and geophysics,chinese academy of sciences,beijing 100029,china

In northern china,the history of desert migration provides a good measure of the East-Asian summer monsoon variations,since the desert margin environment is very sensitive to changes in summer monsoon *** margin migration can be well documented in the downwind loess deposits,since the grain size of chinese loess is principally controlled by source-to-sink distance and hence the loess grain size is an effective proxy for reconstructing the history of the East-Asian summer *** order to investigate the pattern and migration of the summer monsoon rainfall belt over northern china during the past two glacialinterglacial cycles,contour maps of loess grain size were constructed for MIS 2,3,4,5,6 and *** the grainsize isolines show a near north-south gradient for both glacials and interglacials,indicating a dominant dust source region in north and an approximately north-south dust transport pathway for dust deposits in the main body of the Loess Plateau,at least for the past two glacial-interglacial *** reconstructed southeast desert margin for MIS 2,3,4,5,6 and 7 roughly parallels the present isohyets,implying that the pattern of the East-Asian summer monsoon rainfall belt during the past two glacial-interglacial cycles is similar to the present,i.e.a northeast-southwest trend for the isohyets of the summer monsoon,despite the glacial-interglacial *** the grain-size isolines of MIS 2 as a reference,we derive a northerly desert retreat of～160 km,～19 km,～225 km and～223 km for MIS 3,4,5 and 7,respectively,and a southerly desert advance of～29 km for MIS 6,that could be preliminarily regarded as the relative migration distance for the East-Asian summer monsoon rainfall belt In addition,the inferred climate conditions in MIS 3 are cool and humid in northern china,while the driest and coldest interval of the last two glacial periods occurs in MIS 6.

关键词： East-Asian summer monsoon rainfall belt chinese loess grain size Mu Us desert glacial-interglacial cycle

Magnetostratigraphy of the Neogene Sikouzi section at Guyuan,Ningxia,china

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Magnetostratigraphy of the Neogene Sikouzi section at Guyuan...

中国科学院地质与地球物理研究所2007学术年会

作者： Hanchao Jiang ~*,zhongli ding,Shangfa Xiong institute of geology and geophysics.chinese academy of sciences,beijing.100029.china

The thick,widely distributed lacustrine sediments in northern china may have recorded abundant information on the Asian monsoon evolution during the Late ***,reconstruction of such a history with these materials has been hampered by the paucity of reliable chronological *** this study,systematic paleomagnetic measurements were conducted on a well-exposed, 2880-m thick fluviolacustrine sequence on the east side of the Liupan Mountains,a relatively monsoon-sensitive region. Correlation of the resultant magnetic polarity column to the Geomagnetic Polarity Timescale(GPTS) suggests that this sequence spans a time interval of 20.13-0.07 Ma and is generally *** reliability of this correlation was further supported by three lines of independent evidence:*** fossils,pollen assemblages and color changes of the *** of redness of the sedimentary succession suggest a remarkable decrease in air temperature over northern china,which may be closely associated with the global Mid-Miocene cooling caused by the extension of the Antarctic ice *** event may have had an important influence on the evolution of the Asian monsoon circulation.

关键词： Magnetostratigraphy Lacustrine sediments Neogene Ningxia china