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Restoration of eroded stratal thickness in key periods of tectonic change in a multi-stage superimposed Tarim Basin in china

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Journal of Palaeogeography 2012年第2期1卷 149-171页

作者： Liu Hao1, Wang Yingmin2 1. school of Marine sciences, china university of geosciences (beijing), beijing 100083, china 2. school of geosciences, china university of Petroleum (beijing), beijing 102249, china school of Marine sciences China University of Geosciences (Beijing) Beijing 100083 China school of geosciences China University of Petroleum (Beijing) Beijing 102249 China

With an area of 56×104km2, the Tarim Basin is the largest inland basin in china and is also generally acknowledged as one of the most important areas for potential oil and gas exploration. On the basis of data from 22 regional seismic profiles and 40 drilling wells, 15 important first-order and second-order regional unconformities were *** all the main unconformities are superimposed unconfomities. Since the Cambrian, 5 key periods of tectonic change have occurred during the evolution of the Tarim Basin. The total eroded stratal thickness of the above-mentioned unconformities was calculated by using the method of virtual extrapolation of seismic reflection. The results indicate that the total eroded stratal thickness of different periods is quite different in different locations of the basin. Taking the Upper-Middle Ordovician as an example, its thickness restoration of eroded strata was calculated into individual stages i.e. its thickness restoration of eroded strata was calculated to different tectonic periods. Otherwise, as for the specific period of tectonic change, the underlying strata were, respectively eroded and thus the thickness restoration of eroded strata was calculated into individual intervals. Taking the Early Hercynian period as an example, the eroded stratal thickness was calculated into individual intervals to calculate the ratio of intervals of various ages occupying the total eroded thickness. The results show that for the same stratum, its degree of erosion is quite different in different periods and at different locations, due to the varying influence of tectonic movement. The unconformities of some key periods of tectonic change have different controls on the degree of erosion and the eroded range of the individual period of the underlying strata which are the typical characteristics of multi-stage superimposition of unconformities in the Tarim Basin.

关键词： Tarim Basin extrapolation of virtual surface key period of tectonic change superimposed unconformity restoration of eroded stratal thickness

Based on the Spectral Variation of Vegetation Monitoring the Heavy Metal Pollution of Soil

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地学前缘 2009年第S1期16卷 86-87页

作者： Li Mi school of Information Engineering,china university of geosciences(beijing),beijing 100083.china.

Heavy metal pollution of soil is one of serious problems of *** easy to break down, heavy metal was enriched and became the pollutants. It would not only destroy the normal function of soil and impede the growth of crops,but also through the food chain cause the harm to human *** the impact of heavy metal pollution of soil,the vegetation is also very easy to be *** the vegetation has been contaminated,its internal structure,

关键词： heavy metal pollution chlorophyll spectral variation red valley parameters

3D Geological Modeling with Multi-source Data Integration in Polymetallic Region:A Case Study of Luanchuan,Henan Province,china

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地学前缘 2009年第S1期16卷 166-167页

作者： Gongwen Wang~(1,2),Shouting Zhang~(1,2),Changhai Yan~3,Yaowu Song~3,Limei Wang~1 1.school of earth sciences and resources,china university of geosciences(beijing),beijing 100083.china. 2.State Key laboratory of Geological Processes and Mineral resources,china university of geosciences,beijing 100083.china 3.Henan Institute of Geological Survey,Zhengzhou 450007,china

The development of 3D geological models involves the integration of large amounts of geological data,as well as additional accessible proprietary lithological, structural,geochemical,geophysical,and borehole ***,the case study area,southwestern Henan Province,is an important molybdenum-tungsten -lead-zinc polymetallic belt in china.

关键词： 3D geological modeling multi-source data mineral exploration metallogenic model virtual geological section Luanchuan polymetallic region

3D Modeling Quantitative Evaluation for the Underground Space resources in beijing City

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地学前缘 2009年第S1期16卷 283-284页

作者： Yi Tian,Jianping Chen,Limei Wang school of Land resources and Technology,china university of geosciences(beijing),beijing 100083.china.

Recently,underground space evaluation has become fundamental for a city’s long term sustainable development *** paper,based on the 3D-GIS tools,adopts"multi-factors comprehensive evaluation"models to establish a prac... 详细信息

关键词： city underground space resources quantitative evaluation 3D modeling

Hydrocarbon Reservoir Model of Glutenite in the Fourth Member of Shahejie Formation in Northern Dongying Depression

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地学前缘 2009年第S1期16卷 136-137页

作者： Hui Liu~(1,2),Yingchang Cao~3,Yanzhong Wang~3 1.State Key Laboratory of Geological Processes and Mineral resources,china university of geosciences,beijing 100083, china. 2.school of Energy resources,china university of geosciences(beijing),beijing 100083.china 3.Faculty of Geo-resources and Information,china university of Petroleum,Dongying 257061,china

The glutenite in the fourth member of Shahejie Formation(Es^4) in northern Dongying depression straightforwardly penetrated into the muddy bathyal -abyss *** conditions of reservoir is very superior:(1) the high quality thick bedded oil source rock is developed very well in the Lijin sag and Minfeng sag of the study area,and it has the higher capability of generating hydrocarbon;(2) the

关键词： glutenite hydrocarbon reservoir formation northern Dongying depression fourth member of Shahejie Formation

Dehydration melting of solid amphibolite at 2.0 GPa: Effects of time and temperature

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Science china earth sciences 2005年第8期48卷 1120-1133页

作者： ZHOU Wenge1, XIE Hongsen1, LIU Yonggang1, ZHENG Xiaogang1, ZHAO Zhidan2 & ZHOU Hui3 1. Laboratory of Material in the earth’s Interior, Institute of Geochemistry, Chinese Academy of sciences, Guiyang 550002, china 2. Department of Geology, china university of geosciences, beijing 100083, china 3. Department of Geology, Peking university, beijing 100871, china Laboratory of Material in the earth’s Interior Institute of Geochemistry Chinese Academy of Sciences Guiyang China Department of Geology China University of Geosciences Beijing China Department of Geology Peking University Beijing China

Two sets of dehydration-melting with a natural solid amphibolite, collected from North Himalayan structure zone, Tibet, have been carried out in multi-anvil apparatus at 2.0 GPa and 800―1000℃, for 12―200 h. One is keeping the pressure at 2.0 GPa and the annealing time of 12 h, changing the temperature (800―1000℃). The other is keeping the pressure at 2.0 GPa and temperature at 850℃, varying the annealing time (12―200 h). The products are inspected with microscope and electron probe. The results indicate that at 2.0 GPa, annealing time of 12 h, garnets, melts and clinopyroxenes occur in amphibolite gradually with increasing temperature and the chemical compositions of melt vary from tonalite to granodiorite, and then to tonalite. However, at 2.0 GPa and 850℃, with the annealing time increasing, the garnets, melts and cli-nopyroxenes also occur in amphibolite gradually and the chemical compositions of melt vary from tonalite to granodiorite. In both cases, melts interconnect with each other when the contents of melt are over the 5 vol.%. the viscosities of the melt produced in amphibolite at temperature higher than 850℃ are on a level with 104 Pa·s. The interconnected melt with such a viscosity may segregate from the source rock and form the magma over reasonable geological time. Therefore, it is believed that at the lower part of the overthickened crust, the tonlitic and grano-dioritic magma may be generated through the dehydration melting of amphibolite.

关键词： solid amphibolite, high pressure, high temperature, time, partial melting.

A paleontological perspective of vertebrate origin

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Chinese Science Bulletin 2003年第8期48卷 725-735页

作者： SHU Degan Early Life Institute & Department of Geology, Northwest university, Xi抋n, 710069, china school of earth sciences and resources, china university of geosciences, beijing, 100083, china (e-mail: elidgshu@ ***) Early Life Institute Department of Geology Northwest University Xi'an 710069 China school of earth sciences and resources China University of Geosciences Beijing 100083 China

The Early Cambrian Haikouichthys and Haikouella have been claimed to be related to contribute in an important way to our understanding of vertebrate origin, but there have been heated debates about how exactly they are to be interpreted. New discoveries of numerous speci-mens of Haikouichthys not only confirm the identity of pre-viously described structures such as the dorsal and the ven-tral fins, and chevron-shaped myomeres, but also reveal many new important characteristics, including sensory or-gans of the head (e.g. large eyes), and a prominent notochord with differentiated vertebral elements. This 揻irst fish?ap-pears, however, to retain primitive reproductive features of acraniates, suggesting that it is a stem-group craniates. A new order (Myllokunmingiida) and a new family (Myllo-kunmingiidae) are erected, and a new species, Zhongjianich-thys rostratus (gen. et sp. nov.), is described herein. Over 1400 newly-discovered specimens of Haikouella provide a wealth of anatomical information on this organism. It differs from chordates in many organs and organ systems, including the skin, muscles, respiratory, circulatory and nervous sys-tems. In contrast, its body-design resembles that of vetuli-colians, and the presence of a 搕ransitional?nervous system with both dorsal and ventral nerve cords suggests an affinity with living hemichordates. On the basis of these and other recent findings of fossil deuterostomes, a five-step hypothesis for vertebrate origin is proposed, intended to bridge the long- standing gap between protostomes and vertebrates. Four of the five steps accord with established ideas current in modern evolutionary zoology. Evidence for the first step is obtainable only from fossils, and specifically from fossils found from South china, hence the crucial importance of S. china sites for our understanding of early vertebrate origins and evolution. Accordingly, South china is suggested as the oldest-known birthplace of the whole vertebrates.

关键词：脊椎动物动物起源寒武纪中国南部地区

SHRIMP U-Pb dating and Hf isotopic analyses of Middle Ordovician meta-cumulate gabbro in central Qiangtang, northern Tibetan Plateau

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Science china earth sciences 2010年第5期53卷 657-664页

作者： ZHAI QingGuo1 WANG Jun1, LI Cai2 & SU Li3 1 Institute of Geology, Chinese Academy of Geological sciences, beijing 100037, china 2 College of earth sciences, Jilin university, Changchun 130061, china 3 The Geological Laboratory Center and State Key Laboratory of Geological Processes and Mineral resources, china university of Geo- sciences, beijing 100083, china Institute of Geology Chinese Academy of Geological Sciences Beijing China College of earth sciences Jilin University Changchun China The Geological Laboratory Center and State Key Laboratory of Geological Processes and Mineral resources China University of Geosciences Beijing China

Metabasites consisting of metamorphic ultra-mafic rocks, cumulate gabbro, gabbro (diabase), basalt, and plagiogranite are exposed at the Taoxinghu area in central Qiangtang, northern Tibetan Plateau. Zircon SHRIMP U-Pb dating for the cumulate gabbro yields a weighted mean age of 467±4 Ma, which is the oldest and most reliable magmatic age in this area. Zircon 176Hf/177Hf ratios range from 0.282615 to 0.282657, with εHf(t) values of 5.02±0.28, indicating that the cumulate gabbro was mainly derived from the depleted mantle. In addition, geochemical data of metabasites suggest that they have similar characteristics to those in the mid-ocean ridge basalts (MORB). The Taoxinghu metabasites may represent the fragment of Early Paleozoic ophiolite in the "Central Uplift" of the Qiangtang, northern Tibetan Plateau.

关键词： Qiangtang cumulate gabbro SHRIMP dating Hf isotope

Cleaning of Chromate Manufacture Process

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International Journal of Minerals,Metallurgy and Materials 2000年第2期14卷 132-134页

作者： Xing Zou Yi Zhang(Applied Science school, university of Science and Technology beijing, beijing 100083, china)(Institute of Engineering Chemistry and Metallurgy, Chinese Academy of sciences, beijing 100080, china) Applied Science school University of Science and Technology Beijing Beijing 100083 China Institute of Engineering Chemistry and Metallurgy Chinese Academy of Sciences Beijing 100080 China

Sodium chromate solubility is determined in the range of NaOH concentrations from 450 to 810 g/L andsolution temperatUres from 30 to 110℃. The optimized conditions to separate sodium chromate from NaOH inleached solution are resolved. It is first found the method to efficiently separate sbdium chromate from NaOH andsodium altuninate in crude sodium chromate. Bench-scale studies on the separating are performed. Finally, goodseparation results are achieved.

关键词： chromate separation clean process