302铀矿床热液脉体的垂直分带及其成因探讨   总被引：13，自引：0，他引：13  

金景福  倪师军  胡瑞忠 《矿床地质》1992,11(3):252-258

302铀矿床是一个垂幅大、垂直分带较完整的花岗岩型铀矿床。研究结果表明,热液脉体在垂向上表现出“上酸下碱、上氧化下还原”的分带性。这一垂直分带的主要原因是热液的混合和沸腾作用。  相似文献   

302铀矿床石英萤石和方解石的热释光的垂直分带     

倪师军  金景福 《矿物岩石》1992,12(4):103-108

302铀矿床是一个大型的隐伏花岗岩型铀矿床。矿床不同垂深部位产出的石英、萤石和方解石的矿物热释光研究结果表明,这些矿物的人工热释光(ATL)性质在矿床垂向上有明显的反映。矿床上部的石英的ATL发光曲线上只有一个单峰,而矿床下部则可出现有2—3个峰。矿床上部的石英、萤石和方解石的ATL发光强度相对较小,陷阱类型较少,陷阱深度较浅,而矿床下部的情况刚好相反。石英、萤石和方解石的人工热释光性质可以作为划分铀矿床垂直分带的良好标志。  相似文献   

中子测水技术在玻璃生产中的应用   总被引：3，自引：0，他引：3  

叶森钢  葛良全 《物探化探计算技术》2003,25(2):110-112

介绍了基于氢与中子相互作用的原理而形成的中子测水技术，通过在某玻璃厂的应用，表明中子测水技术不但能替代传统的实验室化学分析法，而且还具有在线连续测量、响应快、测量范围宽、精度高等诸多特点，从而比局部取样分析更具代表性和可靠性。  相似文献   

Kinetic Modeling of Diagenesis of Eogene Lacustrine Sandstone Reservoirs in the Jianghan Basin,Southeastern China     

倪师军  卿海若  唐建武  周美夫  李泽琴 《中国地球化学学报》2002,21(4):298-307

In the Tuoshi oilfield,located in the Cenozoic Jianghan Basin of southeastern China ,there have been found hydrocarbon reservoirs hosted in lacustrine sandstones of the Eogene Xingouzui Formation.The main diagenetic features identified in these sandstones include the dissolution of detrital K-feldspar and albite grains,the precipitation of quartz as overgrowths and /or cements ,and the precipitation and /or transformation of clay minerals.These diagenetic features were interpreted to have occurred in early,intermediate and late stages,based on the burial depth.The kinetics of fluid-mineral reactions and the concentrations of aqueous species au each stage of diagenesis were simulated numerically for these lacustrine sandstones,using a quasi-sta-tionary state approximation that incorporates simultaneous chemical reactions in a time-space continuum.During the early diagenetic stage,pore fluid was weakly acidic,which resulted in dissolution of K-feldspar and albite and,therefore,led to the release of K^ ,Na^ ,Al^3 and SiO2(aq) into the diagenetic fluid.The increased K^ ,Na^ ,Al^3 and SiO2(aq) concentrations in the diagenetic fluid caused the precipitation of quartz,kaolinite and illite.At the beginning of the intermediate diagenetic stage the concentration of H^ was built up due to the decomposition of organic matter,which was responsible for further dissolution of K-feldspar and albite and pre-cipitation of quartz,kaolinite,and illite.During the late diagenetic stage,the pore fluid was weakly alkaline,K-feldspar became stable and was precipitated with quartz and clay minerals.When the burial depth was greater than 3000 m,the pore fluids became supersaturated with respect to allbite,but undersaturated with respect to quartz,resulting in the precipitation of albite and the dissolution of quartz.The diagenetic reactions forecasted in the numerical modeling closely matched the diagenet-ic features identified by petrographic examination, and therefore,can help us to gain a better understanding of the diagenetic processes and associated porosity evolution in sandstone reservoirs.  相似文献   

城市生态地球化学评价的盖子模型     

倪师军  葛良全  滕彦国  陈德友  张成江  施泽明 《地质通报》2005,(11)

分析了城市生态地球化学评价的特点.建立了城市生态地球化学评价的盖子模型.按照盖子的阻隔效应,将城市生态地球化学评价分为盖上循环、盖下库内循环和盖子网眼及边缘的库内外开放性循环三大部分内容.城市化进程就是盖子的扩张与修补过程.按盖子模型进行的城市生态地球化学评价有利于预测和防治城市生态地球化学灾害,为城市规划、建设和管理服务.  相似文献   

Eco-Environmental Geochemistry of Heavy Metal Pollution in Dexing Mining Area   总被引：4，自引：0，他引：4  

滕彦国  倪师军  焦鹏程  邓坚  张成江  王金生 《中国地球化学学报》2004,23(4):349-358

An eco-environmental geochemical investigation was carried out in and around the Dexing mining area to determine the concentrations of heavy metals in the surface water, sediments, soils and plants. The main objective of this study is to assess the environmental situation and evaluate the transferring of heavy metals from mining activities into the food chain. Some samples of water, sediment, topsoil and plant were collected along the Lean River in the Dexing mining area. The total concentrations of Cu, Pb, Zn, Cd, and As were determined by AAS, and Hg was analyzed by cold-vapor AAS. Some indices such as ‘contamination degree‘ , ‘geoaccumulation index‘ , and ‘biological absorption coefficient‘ were used to assess eco-environmental quality. The investigation indicated a highly localized distribution pattern closely associated with the two pollution sources along the Le‘an River bank: one is strong acidity and a large amount of Cu in the drainage from the Dexing Cu mining area; and the other is the high concentrations of Pb and Zn in the effluents released from many smelters and mining, processing and extracting activities in the riparian zone. Results from the investigated localities indicated, at least in part, that some problems associated with environmental quality deterioration should be solved in the future.  相似文献   

基于地球化学基线的土壤重金属污染潜在生态风险评价   总被引：14，自引：1，他引：14  

宣昊  滕彦国  倪师军  王金生  张成江 《矿物岩石》2005,25(4):69-72

地球化学基线是区分地球化学背景和异常的重要参数。在采集和测试德兴地区约5000km^2面积的479个表层土壤样品基础上，采用标准化方法确定了样品中Cu，Pb，Zn，Cd，Cr，As和Hg等7种重金属元素的基线值，并以基线作为潜在生态风险评价的参比值，对德兴地区土壤重金属污染进行潜在生态风险评价。结果表明：研究区可划分为3个潜在生态风险等级：轻微生态风险、中等生态风险和强生态风险，强生态风险区主要分布在德兴铜矿和钟家山煤矿等矿业活动区附近。其他大部分地区为轻微生态风险区。  相似文献   

西藏地区联合应用X荧光法和快金分析法快速追踪和评价金异常源   总被引：1，自引：1，他引：1  

葛良全  曹志敏 《地质与勘探》1997,33(5):41-45

论述了在西藏地区某金矿区金异常的追踪和评价工作中，联合应用Ｘ荧光法和快金分析法的效果，以Ｘ荧光法现场测定与金矿化密切相关亲铜元素（或亲铜元素组合），发现，追踪含金矿（化）脉（带），以快金分析法及时对矿（化）脉定性，实践表明，这是一种简捷，快速，经济和有效的工作方法。  相似文献   

X射线荧光技术在胶东地区现场勘查金矿的研究   总被引：2，自引：0，他引：2  

章晔  谢庭周  周四春  葛良全  赖万昌 《物探与化探》1990,14(1):69-72

应用核物探X射线荧光技术，可以利用轻便型X射线荧光仪在野外原生产状条件下（在土壤中或原生露头上）直接测量，了解金矿的指示元素或指示元素总量（如砷、亲铜元素组和银组）的分布规律。由于金与其指示元素或其总量具有密切的相关关系，而且指示元素的分布范围宽广和深远，因  相似文献   

高校科技管理工作中十大辨证关系雏议     

倪师军 《地质科技管理》1994,(4):49-54

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