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Slope Reinforcement for Housing in Three Gorges Reservoir Area

中国科学院地质与地球物理研究所2003.术年会

作者： wu Yasheng and FAN Jiasong institute of geology and {3.,{3. academy of sciences,Beijing 100029

The amplitude of pre-Quaternary sea level drop,H,can be calculated by using the formula H = D + To. where To is the original thickness from the top of the tidal deposits on the reef core to the bottom of the tidal deposits on the reef front,or to the bottom of the ancient meteoric vadose zone,or to the edge of the mixed-water dolostone zone. The identity and similarity between the sea-level drop amplitudes calculated from different reefs far away from each other indicates that such sea-level changes are eustatic rather than relative *** of an end-Permian sea-level drop has been found on the Changxingian(*** end of the Palaeofusulina zone) reefs at Ziyun in South China,including algal laminated deposits,sabkha-related *** cracks,dissolution collapse breccia. According to calculation based on the meteoric dissolution zone of the reef-core sequence at Ziyun,Guizhou province, the amplitude of the sea-level drop at the end-Permian is about 89.3.*** via the dolomitized upper part of the Changxingian reef in Lichuan,Hubei Province,yields an 88.9 m amplitude of the sea-level drop at the end-Permian. Comparison shows that the sea-level drop recorded in the two distantly located reefs may be of eustatic *** the amplitude of the sea level drop of the Tethys Sea at the end-Permian might be at least 89.3.m.

关键词： sea-level drop eustatic reef Permian Changxingian

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Journal of Mountain Science 2011年第2期8卷 314-320页

作者： wu Faquan LUO Yuanhua CHANG Zhonghua institute of geology and geophysics Chinese Academy of Sciences Beijing 100029 China Office of Three Gorges Project Construction Committee the State Council of China Beijing 100038 China

The Three Gorges Project of the Yangtze River is the largest hydropower-complex project under construction in the world. Under the largescale relocation projects, 2874 engineered slopes are formed along with the construction of new towns. In this paper, the cutting slopes are mainly soil slopes and rock slopes. Soil slopes include residual soil slopes, colluvial accumulation slopes, swelling soil slopes, and artificial earth fill slopes, etc. Rock slopes include blocky structure rock slopes, layer structure rock slopes, and clastic structure rock slopes, etc. Varied protection measures have been used for slope protection in the reservoir area including shotcrete concrete-anchor bars, frame beams, retaining walls, slope stabilizing piles, sheet-pile walls, anchorage anti-shear tunnels, flexible protection grids, and drainage, etc. Besides, slope deformation monitoring systems have been set up to monitor deformation failure and the stability state of slopes. The protection measures have guaranteed slope safety and maintained a harmony with the urban environment and surrounding landscape.

关键词： Slope reinforcement Housing for resettlement Three Gorges Reservoir

Tectonic setting of the Helong Block:Implications for the northern boundary of the eastern North China Craton

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Science China Earth sciences 2005年第10期48卷 1599-1612页

作者： ZHANG Yanbin1, wu Fuyuan1, ZHAI Mingguo1 & LU Xiaoping1,2 1. institute of geology and {3.,{3., P.O. Box 9825, Beijing 100029, China 2. Regional Geological and Mineral Resources Survey of Jilin Province, Changchun 13.062, China chinese academy of sciences Regional Geological and Mineral Resources Survey of Jilin Province

LA-ICP-MS zircon U-Pb dating indicates that the Bailiping granitic pluton was em-placed during Late Paleozoic to Early Cretaceous (285―116 Ma) by four distinct magmatic epi-sodes, arguing against the previous thought that the Bailiping granites were emplaced during Archean, Proterozoic or Early Paleozoic. It is suggested that the so-called Archean Jincheng-dong granite-greenstone belt, mainly composed of Bailiping granites, should be broken down. Sr-Nd isotopic compositions of the Bailiping granites are similar to those of the Phanerozoic granites in the Xing’an-Mongolian orogenic belt, suggesting that their parental magmas were mainly derived from a juvenile crust with some contamination of ancient crustal materials during magma rising and/or emplacement. Therefore, the basement of the Helong Block is similar to that in the northern Xing’an-Mongolian Orogenic Belt, but different from that of the North China Craton. It is proposed that the Archean Jinchengdong complex in this area is probably an exotic slice from the North China Craton, which indicates that the Fu’erhe-Gudonghe Fault, located in northern part of the Helong area, is not the boundary between the North China Craton and the Xing’an-Mongolian Orogenic Belt. The possible boundary should be located further southward more than 50 km and near the Baitoushan volcano.

关键词： LA-ICPMS ziron U-Pb dating, Bailiping complex, Helong Block, North China Craton, Sr-Nd isotope.

GEOCHEMICAL EVIDENCE FOR TWO TYPES OF BASALT IN THE HONGLIUGOU OPHIOLITE MELANGE IN THE ALTYN FAULT BELT, CHINA

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Scientia Geologica Sinica 2001年第2期 133-142页

作者： wu Jun, Lan Chaoli, Li Jiliang, and Yu Liangjun Laboratory of Lithosphere Tectonic Evolution, institute of geology and {3.,{3., Beijing, 100029 Wang Yitian institute of geology, chinese academy of Geological sciences, Beij

This paper further provides geochemical evidence for the Hongliugou ophiolite melange. The two types of basalt (MORB and OIB) indicates that an ocean, perhaps a large one, once existed in this region during Early Paleozoic. Their coexistence is clearly the result of late tectonic migrations. Considering a similar assemblage of MORB and OIB in north Qilian Mountains, the strike-slip distance along the Altun fault belt will be estimated possibly.

关键词： OIB meta GEOCHEMICAL EVIDENCE FOR TWO TYPES OF BASALT IN THE HONGLIUGOU OPHIOLITE MELANGE IN THE ALTYN FAULT BELT CHINA

India Collided with Asia at Least 72 Ma:Recognition of An Underfilled Foreland Basin in Central Himalaya

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地学前缘 2009年第S1期16卷 271-272页

作者： Xiumian Hu,Jiangang Wang,Luba Jansa,Fuyuan wu,Jinhai Yu 1.Department of Earth sciences,Nanjing University,Nanjing 210093.China. 2.Geological Survey of Canada-Atlantic,Dartmouth,N.S.,Canada 3.institute of {3. and {3.,chinese academy of sciences Beijing 100029,China

The Himalayan peripheral foreland basin developed when India and Asia *** studies in the Himalayan foreland were mostly concentrated on Neogene continental clastic sedimentation in sub-Himalaya or Paleogene shallow ma... 详细信息

关键词： Himalayan foreland underfilled foreland basin peripheral foreland

MINERAL AND CHEMICAL COMPOSITIONS OF VARIOLITIC ANDESITE IN THE DABIE MOUNTAINS, CHINA

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Scientia Geologica Sinica 2000年第4期 393-399页

作者： Fu Yongtao (Laboratory of Lithosphere Tectonic Evolution, institute of geology and geophysics,{3., Beijing 100029 institute of Oceanology,{3., Qingdao 266071) Li Jiliang and wu Yungao (Laboratory of Litho

The variolitic basaltic andesite in the Dabie Mountains occurs south of the boundary of the Susong high-pressure metamorphic belt and the South Dabie ultra-high-pressure metamorphic belt. The variolitic structure indicates an eruption beneath water. The variole contains primary, radiate plagioclase and minor pyroxene, hornblende and altered quartz. The matrix consists of glass, chlorite, epidote and zoisite. The major composition is SiO2=56.8%, TiO2=0.9%, MgO=6.4% and Fe2O3.total)=7.1%. Mg values are relatively high, ranging from 64.2 to 66.2. The variolitic andesite is believed to erupt beneath water before the continental collision between the North China Block and Yangtze Block.

关键词： ?

Lithosphere types in North China:Evidence from geology and geophysics

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Science China Earth sciences 2005年第11期48卷 1809-1827页

作者： QIU Ruizhao1,2, DENG Jinfu3. ZHOU Su3. LI Jinfa4, XIAO Qinghui1,5, wu Zongxu6 & LIU Cui3.1. institute of geology, {3. {3. of Geological sciences, Beijing 10003., China 2. Development and Research Center, China Geological Survey, Beijing 10003., China 3. China University of Geosciences, Beijing 100083. China 4. China University of Geosciences, wuhan 43.074, China 5. Information Center of Ministry of Land and Resources, Beijing 100812, China 6. institute of geology, State Seismological Bureau, Beijing 100029, China institute of geology Chinese Academy of Geological Sciences Beijing China Development and Research Center China Geological Survey Beijing China China University of Geosciences Beijing China China University of Geosciences Wuhan China Information Center of Ministry of Land and Resources Beijing China institute of geology State Seismological Bureau Beijing China

On the basis of the characteristics of geology and geophysics in North China, three types of lithosphere, namely, the cratonic, the orogenic and the rift lithospheres can be classified. In terms of petrological method (based on the information from Precambrian rock assemblages, igneous activities, deep-seated enclaves, etc.) and the relationship between seismic velocity and rock compositions, the crust-mantle petrological and chemical structure models can be set up. Researching results indicate that the geology and geophysics of North China platform bears the similar characteristics in comparison with those of the global typical cratons. The Eerduosi(Ordos) block located in the west of the North China Platform is a remnant of cratonic lithosphere after the North China platform had undergone “activation” in Mesozoic and “reconstruction” in Cenozoic times. The continental crust consists mainly of TTG rock assemblage while the subcontinental lithosphere mantle mainly consists of strongly depleted harzburgite. The craton was finally formed in late Archaean and early Proterozoic, and has been kept in stability up to present; its crustal-mantle petrological structures of lithosphere can be set up as a reference for the study of North China craton and even Sino-Korean craton. In the Mesozoic period, the middle and east areas of North China platform were activated in the Yanshanian orogenic process, the continental crust was reformed by material and heat-transfer of convective mantle and the original crustal TTG component was reconstructed to be granitic crust, and the subcontinental lithosphere man- tle was replaced by the Yanshanian harzburgite-lherzolite. The Yanshan-Taihang Mountains were the remnants of orogenic lithosphere after the rifting in eastern North China in Cenozoic. The present thickness of continental crust and lithosphere in the Yanshan-Taihang Mountains is not equal to their thickness during the Yanshanian orogenic movement because they had undergone the

关键词： lithospheric types,evidence of geology and geophysics,crust-mantle petrological structure,deep process

TWO TYPES OF XENOLITH—MANTLE XENOLITH AND CRUSTAL XENOLITH FOUND IN THE CENOZOIC VOLCANIC ROCKS FROM HOH XIL, NORTHERN TIBET PLATEAU

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地学前缘 2000年第S1期7卷 197-198页

作者： wu Cailai,Yang Jingsui,Li Haibing,Shi Rendeng[WT5,5”BX](institute of geology,{3. {3. of Geological sciences,Beijing 10003.,China)

It is known that large amounts of Cenozoic high potassium volcanic rocks occur on the Tibetan plateau. The question is where do those high potassium magmas come from? Since the plateau is being compressed by subduction and collision from the surrounding continents,it is a puzzle for us what is the formational environment and tectonic setting of these volcanic rocks? In particular,what is the relationship between these special rocks and formation and uplift of the plateau? We recently carried out an investigation on these Cenozoic volcanic rocks in Hoh Xil,northern Tibetan plateau,including volcanic rocks in the Jingyuhu,Xiongyingtai and Shuangquanzi areas. In the region,some older lava flows occur as thick sheets with a flat surface and weathering crust; while some relatively younger lavas remain a relict volcanic cone or vent. Most of the relict cones are small (1 or close to 1,and mostly belonged to shoshonite\|trachyte association and some to ultra\|potassic rocks. The K\|Ar dating of whole rock and mica shows that the volcanism lasts from middle Miocene (15 47Ma) to Pleistocene (0 69Ma); they are 0 69Ma,13.77Ma and 15 47Ma in Jingyuhu; 11 05Ma,12 22Ma and 12 83.a in Xiongyingai,; 1 58Ma,2 24Ma,5 23.a,5 85Ma,8 20Ma,8 41Ma and 10 67Ma in *** types of xenolith and xenocryst were found in Jingyuhu and Xiongyingtai,i.e..,crustal xenolith and mantle xenocryst.

关键词： xenolith xenocryst shoshonite trachyte Cenozoic volcanic r ock Tibet Hoh Xil

Study on kinetics of hydrocarbon generation from coals in the Qinshui Basin

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Science Bulletin 2005年第17期 90-97页

作者： DUAN Yi1, wu Baoxiang1,3. ZHENG Chaoyang1,3. WANG Chuanyuan1,3. ZHANG Hui1, TAO Mingxin1, LIU Jinzhong2 & ZHANG Xiaojun1,3.1. institute of geology and {3.,{3., Lanzhou 73.000, China 2. Guangzhou institute of Geochemistry,{3., Guangzhou 510640, China 3. Graduate School of{3., Beijing 10003., China

A new method for the quantitative assessment of hydrocarbon generation potential from coals by means of the chemical reaction kinetics has been developed gradually over the recent years. In this paper, the kinetic parameters of hydrocarbon gas generation are determined by high tem-perature and pressure, and closed- system thermal simula-tion for Late Paleozoic coals in the Qinshui Basin and the kinetic characteristics and the histories of hydrocarbon gas generation were studied using the parameters obtained. Re-sults show that during the longer period from the Triassic (T) to the Middle Jurassic (J2), the coal-derived methane yield increased more slowly under lower palaeogeotemperature in the Qinshui Basin; however, the shorter period from Late Jurassic to Early Cretaceous, the coal-derived methane yield increased more rapidly under higher palaeogeotemperature. The correlation between the thermal simulation and the fac-tual data shows that C1/ (C1+C2―4) coefficients computed by the histories of methane and C2―C4 hydrocarbon generation can provide evidence for the identification of the genesis of coal bed gas in the different areas of the Qinshui Basin. The kinetic simulating experiment of hydrocarbon generation for the peat considered as the original matter of coal formation was performed for the first time and the simulated results were compared with the characteristics of hydrocarbon gen-eration from coals undergoing various palaeogeotemperature in the Qinshui Basin. The result indicates that the peat has a higher potential of hydrocarbon generation than that of coals. Therefore, the hydrocarbon generation results obtained from kinetic simulation for coal with higher maturation rank could not stand for their original hydrocarbon generation potential and thus would lead to an underestimation for coal-bed gas resource. The generative amount of coal-derived gas in the Qinshui Basin was predicted using kinetic simula-tion results for the peat and their maximum was est

关键词： Qinshui Basin hydrocarbon generation of coal kinetic simulation prediction for the amount of coal-derived gas generation.