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沉积有机质激光热裂解色谱质谱探针分析技术的尝试及其前景探讨 总被引：1，自引：1，他引：1
激光热裂解－色谱－质谱分析方法具有从技术层面上融合分子地球化学方法和有机岩石学方法的潜能。通过抚顺煤镜质组分和树脂体的研究实例，介绍了激光热裂解－色谱－质谱探针分析的基本原理及测试方法。抚顺煤显微组分的微区热裂解产物特征中，镜质组和树脂体热解产物的正烷烃、烷基萘和四氢化萘的总体面貌相似，但树脂体中正烷烃含量较低，而烷基四氢化萘明显较高，这可能反映显微组分形成过程中发生过低分子烃类在各显微组分之间的混合作用。除此之外，还把激光热裂解－色谱－质谱探针技术与传统的分子地球化学方法、有机岩石学方法进行比较。探讨了激光热裂解－色谱－质谱探针技术的应用前景以及尚待解决的技术问题。落射到样品表面的激光束能量（温度）和控制和激光辐射时间的，激光束斑大小、热解产物量、色谱－质谱检验灵敏度极限三者关系等，都是限制新技术应用的技术问题。 相似文献
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宁芜玢岩铁矿成因新论：同化作用、高侵位和铁质聚合 总被引：3，自引：0，他引：3
通过矿物学、岩石学、矿床学、地层学等学科的综合研究证明:宁芜地区中生代中基性岩浆在其上侵和在高位岩浆房就位过程中,同化了基底青龙群灰岩和石膏灰岩;辉石闪长玢岩是早于辉石安山岩的高位侵入体,它是以侵入产状为主的;梅山富矿体是由形成闪长玢岩的岩浆中的铁质分馏、聚合而成,被同化的成分犹如添加剂,促进了这种不混溶成矿流体的形成。下扬子地区中下三叠统青龙群的分布是这一地区与火山岩有关的铁矿、锶矿形成的重要因素。 相似文献
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The four leading tidal constituents M2, S2, K1 and O1 in the South China Sea are simulated by using POM. The model is forced with tide-generating potential and four leading tidal constituents at the open boundary. In order to simulate more exactly, TOPEX/Poseidon altimeter data are assimilated into the model and the open boundary is optimized. The computed co-tidal charts for M2 and K1 constituents are generally consistent with previous results in this region. The numerical simulation shows that energetic internal tides are generated over the bottom topography such as the Dongsha Islands, the Xisha Islands, the Zhongsha Islands, the Nansha Islands and the Luzon Strait. 相似文献
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The Nonlinear Interaction Process in the wave Assimilation Model and Its Experiments 总被引：3，自引：0，他引：3
This paper presents a composite interaction formula based on the discrete-interaction operator of wave-wave nonlinear interaction for deriving its adjoint source function in the wave assimilation model.Assimilation experiments were performed using the significant wave heights observed by the TOPES/POSEIDON satellite,and the gradinet distribution in the physical space was also analyzed preliminarily. 相似文献
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With the aid of Meteorological Information Composite and Processing System （MICAPS）, satellite wind vectors derived from the Geostationary Meteorological Statellite-5 （GMS-5） and retrieved by National Satellite Meteorology Center of China （NSMC） can be obtained. Based on the nudging method built in the fifth-generation Mesoscale Model （MM5） of Pennsylvania State University and National Center for Atmospheric Research, a data preprocessor is developed to convert these satellite wind vectors to those with specified format required in MM5. To examine the data preprocessor and evaluate the impact of satellite winds from GMS-5 on MM5 simulations, a series of numerical experimental forecasts consisting of four typhoon cases in 2002 are designed and implemented. The results show that the preprocessor can process satellite winds smoothly and MM5 model runs successfully with a little extra computational load during ingesting these winds, and that assimilation of satellite winds by MM5 nudging method can obviously improve typhoon track forecast but contributes a little to typhoon intensity forecast. The impact of the satellite winds depends heavily upon whether the typhoon bogussing scheme in MM5 was turned on or not. The data preprocessor developed in this paper not only can treat GMS-5 satellite winds but also has capability with little modification to process derived winds from other geostationary satellites. 相似文献
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Using the latest version of Mesoscale Modeling System (MM5v3), we assimilated wind data from the scatterometer and built a model to assimilate the wind field over eastern China seas and adjacent waters and applied the wave model WAVEWATCH-Ⅲ to test the sea area with assimilative wind and blended wind of QSCAT and NCEP as driving forces. High precision and resolution numerical wave results were obtained. Analysis indicated that if we replace the model wind result with the blended wind, better sea surface wind results and wave results could be obtained. 相似文献
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大兴安岭南段林西地区中生代酸性岩类岩浆的混染作用 总被引：2，自引：3，他引：2
大兴安岭南段林西地区广泛出露以海相玄武安山岩、安山岩为主的晚古生代火山．沉积岩。中生代火山-侵入杂岩也广泛分布其中。花岗岩体的边部普遍二长花岗岩化和花岗闪长岩化(甚至出现闪长岩)，并含有丰富的以玄武质-安山质为主的岩石包体。侵入体-围岩接触带附近为围岩被岩浆侵蚀的港湾状交代反应过渡带。英安岩-粗面英安岩也含有相同的岩石包体，并且与流纹岩密切共生。岩石包体周缘的寄主岩常见淬冷边，聚集针状磷灰石，表明它被捕获时已是冷却的岩石，而非热的玄武岩浆团；它们的Nb／Ta、Zr／Hf比值、弱交代者的化学成分与晚古生代火山-沉积岩一致，Rb-Sr同位素比值散布在晚古生代火山-沉积岩等时线附近，其含量、未交代程度、尖棱状程度、刚性程度在侵入体中从内部到边部增多(强)，且较新鲜者结构构造与围岩相同，表明它们来自晚古生代火山-沉积岩组成的围岩；其含量与岩体边部的位置及二长花岗岩、花岗闪长岩、(粗面)英安岩的成分变化有关，表明包体成分已加入到这些岩石当中。这些岩石的环带状斜长石有两种内核：一种较富钙；另一种较贫钙。两种内核的斜长石外环成分趋同，强交代岩石包体成分和富含岩石包体的酸性岩成分趋同。两者皆记录了两种来源的物质成分同化的过程。同一岩体边部(或火山岩中)酸度较低的岩石化学成分、高场强元素在Harker图解和Nb／Ta(和Zr／Hf)-SiO2及Nb／Ta-Zr／Hf图解中具有中生代花岗或流纹岩浆与晚古生代火山-沉积岩物质混合的特征。这些事实证明林西地区中生代酸性岩浆被较基性的晚古生代火山物质混染，并生成酸度较低的混染岩浆。较基性的火山物质是在低绿片岩相变质的基础上，经钠化交代反应被酸性岩浆同化的。 相似文献
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The Limahe intrusion is a typical rock hosting Cu-Ni sulfide deposit in the Panxi district. The major element, trace element and Sr-Nd isotopic geochemical data are reported in this study both firstly and systemically. Age-corrected （87Sr/86Sr） and εNd（t） isotope values, ranging from 0.687062 to 0.709298, from -0.6 to -4.13 respectively, are partly overlap the field of the Emeishan basalt and OIB, and they lie between upper crust and OIB generally. The similar patterns between the Limahe intrusion and the picrites of the Emeishan large igneous province imply the genetic relationship to the Emeishan basalts. Their lower Nb/U （〈30）, higher （La/Nb）pM and （Th/Ta）pM ratio values （〉1） indicate contamination of the upper crust material. The correlation between MgO and major oxides reflects the fractional crystallization of olivine, clinopyroxene and minor plagioclase in the deep-seated chamber. Therefore increased SiO2 and lowered FeO by the upper crustal contamination may trigger immiscible sulfide melt, which then flowed along the structural fracture and intruded into gabbrodiorite, resulting in the formation of Cu-Ni sulfide orebody. 相似文献
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The effect of three-dimensional variational data assimilation of QuikSCAT data on the numerical simulation of typhoon track and intensity 总被引：4，自引：0，他引：4
In this paper, the three-dimensional variational data assimilation scheme (3DVAR) in the mesoscalemod el version 5 (MM5) of the US Pennsylvania State University/National Center for Atmospheric Research is used to study the effect of assimilating the sea-wind data from QuikSCAT on the prediction of typhoon track and intensity. The case of Typhoon Dujuan (2003) is first tested and the results show appreciable improvements. Twelve other cases in 2003 are then evaluated. The assimilation of the QuikSCAT data produces significant impacts on the structure of Dujuan in terms of the horizontal and vertical winds, sealevel pressure and temperature at the initial time. With the assimilation, the 24-h (48-h) track prediction of 11 (10) out of the 12 typhoons is improved. The 24-h (48-h) prediction of typhoon intensity is also improved in 10 (9) of the 12 cases. These experiments therefore demonstrate that assimilation of the QuikSCAT sea-wind data can increase the accuracy of typhoon track and intensity predictions through modification of the initial fields associated with the typhoon. 相似文献