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There are 26 papers published in subject: > since this site started. |
Results per page: | 26 Total, 3 Pages | << First < Previous 1 2 3 |
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1. Sb Pollution in the Soil, Moss and Sediments of Ny-Alesund, Svalbard, Arctic | |||
Sun liguang,Linxi Yuana,Nan Jiaa,Kehua Youa,Xiaofei Wanga,Yuhong Wanga | |||
Earth Science 12 January 2010 | |||
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Abstract:The Sb concentrations in the soil, moss and sediment samples from Ny-Alesund, Svalbard, were determined. The Sb concentrations in the soil and moss samples from the area with previous coal mine are substantially higher than those from the area without, apparently caused by coal mining activities. The studied moss Dicranum anaqustum has a great enrichment of Sb, and thus a good potential of being used as bio-indicator for the Sb pollution in Ny-Alesund. The Sb level in the surface 10cm sediments of one sediment column has a striking associated with human activities such as coal mine exploitation and utilization and oil burning. | |||
TO cite this article:Sun liguang,Linxi Yuana,Nan Jiaa, et al. Sb Pollution in the Soil, Moss and Sediments of Ny-Alesund, Svalbard, Arctic[OL].[12 January 2010] http://en.paper.edu.cn/en_releasepaper/content/38842 |
2. A first-principles study of the structural properties of jadeite at high pressure | |||
Fan Xiaoyu ,Wu Xiuling ,Meng Dawei ,Liu Weiping ,Hong Hanlie ,Zheng Guang ,Zheng Jianping | |||
Earth Science 11 January 2010 | |||
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Abstract:The structural properties of jadeite are investigated using plane-wave pseudopotential density functional theory method. As a function of pressure, the monoclinic cell parameters were calculated and the compressibility coefficients are 0.0025, 0.0024 and 0.0025 GPa-1, respectively. The bond length, bond angle, and distortion variation were studied in order to obtain the information of polyhedral compression. The Birch-Murnaghan equation of state was considered in the theoretical calculations of E-V and P-V data for the bulk modulus B0, which were compared with the result based on the linear compressibilities. Comparison between the calculated B0 values and the experimental data suggested that the model provides reasonable insights into crystallographic and physical properties of jadeite. | |||
TO cite this article:Fan Xiaoyu ,Wu Xiuling ,Meng Dawei , et al. A first-principles study of the structural properties of jadeite at high pressure[OL].[11 January 2010] http://en.paper.edu.cn/en_releasepaper/content/38783 |
3. The Neoproterozoic molar-tooth carbonatite types in Northern Anhui and Jiangsu Provinces and the forming mechanism | |||
Jia Zhihai,Zhang Liwei,Hong Tianqiu,Zheng Wenwu | |||
Earth Science 08 January 2010 | |||
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Abstract:Molar-tooth carbonatites can be found in almost all the Neoproterozoic carbonatite strata in Northern Anhui and Jiangsu Provinces. According to their features in different strata, two molar-tooth carbonatite types can be differentiated in this area. Type 1 molar-tooth carbonatites coexisted with stromatolite bioherms, gravels, debris, slump structures, swash channels and hummocky crossbeddings, were formed in the upper Liulaobei Formation and Jiuliqiao Formaiton which belong to the lower Neoproterozoic in this area. Type 2 molar-tooth carbonatites consisted in widely spread rhythmic units with graded beds and typical erosion surfaces, were formed in other Formations which belong to the upper Neoproterozoic in this area. The initial forming power of the molar-tooth carbonatites in this area might be the crustal movements which were caused by the break-up of the Rodinia. Type 1 molar-tooth carbonatites formed in tempestuously changing environments might be a signal of the break-up prelude of the Rodinia, while Type 2 molar-tooth carbonatites formed in steadily, periodically changing environments might indicate the intermittent release of the earth stress during the break-up period of the Rodinia. | |||
TO cite this article:Jia Zhihai,Zhang Liwei,Hong Tianqiu, et al. The Neoproterozoic molar-tooth carbonatite types in Northern Anhui and Jiangsu Provinces and the forming mechanism[OL].[ 8 January 2010] http://en.paper.edu.cn/en_releasepaper/content/38685 |
4. Application of Multi-sensor Data Fusion Based on AIS to Landslide Data Analysis | |||
Xu Qiang,Yuan Yong | |||
Earth Science 10 January 2007 | |||
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Abstract:Current researches on landslide forecast are to a great extent dependent on the information from some key monitoring points. How to effectively use the information from all the different monitoring points in different parts of the landslide is a basic subject of landslide forecast. After a brief survey of multi-sensor data fusion and AIS with emphasis on data fusion methods and immune algorithm, this paper applies the algorithm of multi-sensor data fusion based on AIS to dealing with the monitoring information, and very successful results are obtained in the case study. | |||
TO cite this article:Xu Qiang,Yuan Yong. Application of Multi-sensor Data Fusion Based on AIS to Landslide Data Analysis[OL].[10 January 2007] http://en.paper.edu.cn/en_releasepaper/content/10662 |
5. Geochemical features of Tertiary lacustrine algal reef in western Qaidam basin,China | |||
Zhong Jianhua,Wen Zhifeng,Li Yong,Wang Haiqiao | |||
Earth Science 15 November 2006 | |||
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Abstract:Abundant and widely distributed lacustrine reef reservoirs with extraordinary property and high reserve are discovered in western Qaidam basin. Herein, the reef in Qaidam basin are first studied in terms of Lipoid compound, Chain alkane, Cycloalkane, Amino acid and Kerogen, so as to illustrate the geochemical properties of the algal reef, and deduce some origin and environmental significance. The kerogen type of the algal reef are described and classified into four types according to its specific component. | |||
TO cite this article:Zhong Jianhua,Wen Zhifeng,Li Yong, et al. Geochemical features of Tertiary lacustrine algal reef in western Qaidam basin,China[OL].[15 November 2006] http://en.paper.edu.cn/en_releasepaper/content/9574 |
6. A Model for the Wumishan Cycle and Their Vertical Stacking Patterns: Cyclic Sedimentation Genetically Related to Milankovitch Cycles in the Precambrian | |||
Mei Mingxiang,Zhou Hongrui,Du Benming,Luo Zhiqing | |||
Earth Science 19 December 2005 | |||
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Abstract: Carbonate strata of the Meso-Proterozoic Wumishan Formation in the Jixian area near Tianjin are ~3300 m thick and were deposited over some 100 million years (from ~1310±20 Ma to ~1207±10 Ma). Metre-scale cycles (parasequences) dominate the succession. They are generally of the peritidal carbonate type, and mostly show an approximately symmetrical lithofacies succession with thin stromatolite biostromes and small thrombolite bioherms constituting the central part and tidal-flat dolomites forming the upper and lower parts. Lagoonal dolomitic shales with palaeosoil caps make up the topmost layers. The boundaries of the Wumishan cycles are typically exposure surfaces, and there is abundant evidence for fresh-water diagenesis. Widespread 1:4 stacking patterns indicate that the individual Wumishan cycles are sixth-order parasequences, with 4 parasequences constituting one fifth-order parasequence set. Locally, 5-8 seventh-order beds or couplets, can be discerned in some of the cycles. The regular vertical stacking pattern of seventh-order beds within the sixth-order parasequences, forming the fifth-order parasequence sets, are interpreted as the result of environmental fluctuations controlled by Milankovitch rhythms, namely the superimposition of precession, and short and long-eccentricity. The widespread 1:4 stacking pattern in the cyclic succession, as well as the local 1:5-8 stacking patterns of the beds within the cycles, suggest that the Milankovitch rhythms had similar ratios in the Meso-Proterozoic as in the Phanerozoic. Based on the cycle stacking patterns, 26 third-order sequences can be distinguished and these group into 6 second-order, transgressive-regressive megasequences, all reflecting a composite, hierarchical succession of sea-level changes. | |||
TO cite this article:Mei Mingxiang,Zhou Hongrui,Du Benming, et al. A Model for the Wumishan Cycle and Their Vertical Stacking Patterns: Cyclic Sedimentation Genetically Related to Milankovitch Cycles in the Precambrian[OL].[19 December 2005] http://en.paper.edu.cn/en_releasepaper/content/4458 |
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