地下水中活性溶质迁移的野外与实验室研究     

Kent.  DB 史卫红 《华东地质学院学报》1990,13(3):59-61

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热磁技术确定矿床有效指示元素的试验与效果     

胡树起  马生明  刘崇民 《物探化探计算技术》2014,(6):730-735

针对找矿指标的有效性和找矿模型的普适性问题,研究引入热磁技术,以乌努格吐山铜矿和丰山洞铜矿为例,对比分析了土壤热磁组分与岩石、岩石热磁组分与黄铁矿的元素组合。试验表明,在确定成矿指示元素组合方面,土壤热磁组分是一种可行的介质,相比岩石具有更高的元素含量,可以挖掘出更多的异常信息;而岩石热磁组分与黄铁矿则具有一致的元素组合,比较而言,岩石热磁组分具有更宽的适用范围(如风化岩石)。作为一种人工方法分离组分,热磁组分弥补了岩石或黄铁矿等自然介质本身所固有的一些不足,为成矿指示元素的选择提供了一个新的研究平台;对于确定同一类型矿床有效指示元素组合,解决找矿模型的普适性问题,开拓了一种新思路。  相似文献   

成矿元素相态对地球化学异常识别的作用     

刘崇民  胡树起  马生明  汤丽玲 《物探与化探》2013,(6):1049-1055

为确定元素相态识别异常的作用,研究了斑岩铜矿Cu和热液铅锌矿床Zn的硫化物相、氧化物相和结合相组成。斑岩铜矿区,Cu以硫化物相和氧化物相为主,(w硫化物相Cu+w氧化物相Cu)/w结合相Cu≥21、(w硫化物相Cu+w氧化物相Cu)/w全量Cu≥96%,是矿化异常的标志。在铅锌矿区,背景区Zn的含量主要是结合相;在w(Zn)≥200×10-6异常地段,Zn主要是以硫化物相(包括氧化物相)存在,(w硫化物相Zn+w氧化物相Zn)/w全量Zn≥87%、(w硫化物相Zn+w氧化物相Zn)/w结合相Zn≥7时是有利的找矿地段,将是指示出露矿和隐伏矿的标志。  相似文献   

白银厂矿田折腰山海相火山岩型铜矿床地球化学异常特征   总被引：5，自引：1，他引：4  

刘崇民 《地质与勘探》1999,35(5):28-30,35

论述了白银厂矿田折腰山铜矿床的地质,地球化学特征,认为该矿床的主要指示元素是Ｃｕ,Ａｇ,Ａｓ,Ｓｂ,Ｈｇ,Ｐｂ,Ｚｎ,Ａｕ,Ｃｄ,Ｂａ,进而讨论了这些元素在区域,矿床的异常特征以及垂直分带规律,最后总结出矿床的地球化学异常模式。  相似文献   

Critical tissue copper residues for marine bivalve (Mytilus galloprovincialis) and echinoderm (Strongylocentrotus purpuratus) embryonic development: conceptual, regulatory and environmental implications     

Rosen G  Rivera-Duarte I  Chadwick DB  Ryan A  Santore RC  Paquin PR 《Marine environmental research》2008,66(3):327-336

Critical tissue copper (Cu) residues associated with adverse effects on embryo-larval development were determined for the Mediterranean mussel (Mytilus galloprovincialis) and purple sea urchin (Strongylocentrotus purpuratus) following laboratory exposure to Cu-spiked seawater collected from San Diego Bay, California, USA. Whole body no-observed-effect-residues (NOER) were similar, with means of 21 and 23mugg(-1)dw, for M. galloprovincialis and S. purpuratus, respectively. Mean whole body median effect residues (ER50) were 49 and 142mugg(-1)dw for M. galloprovincialis and S. purpuratus, respectively. The difference in ER50s between species was reduced to a factor of <2 when expressed as soft tissue residues. Coefficients of variation among whole body-ER50s were 3-fold lower than median waterborne effect concentrations (EC50) for both species exposed to samples varying in water quality characteristics. This suggests that tissue concentrations were a better predictor of toxicity than water concentrations. The CBRs described herein do not differentiate between the internal Cu concentrations that are metabolically available and those that are accumulated and then detoxified. They do appear, however, to be well enough related to the level of accumulation at the site of action of toxicity that they serve as useful surrogates for the copper concentration that affects embryonic development of the species tested. Results presented have potentially important implications for a variety of monitoring and assessment strategies. These include regulatory approaches for deriving saltwater ambient water quality criteria for Cu, contributions towards the development of a saltwater biotic ligand model, the conceptual approach of using CBRs, and ecological risk assessment.  相似文献   

阿伯特白垩系／第三系界线粘土中毫微米级金刚石     

Carl.  DB 杨玉卿 《地质科学译丛》1992,9(2):30-32

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西班牙纳维亚金矿带的硫同位素研究     

Arias.  D 刘崇民 《物探化探译丛》1998,(1):56-61

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三道沟铅锌（银）矿点地球化学找矿异常评价     

刘崇民 《有色金属矿产与勘查》1998,7(3):164-168

根据三道沟矿区地表岩石地球化学测量结果,讨论了Ｐｂ、Ｚｎ、Ａｇ、Ａｕ、Ｂ、ＢｉＩ、Ｈｇ、Ａｓ、Ｓｂ、Ｃｕ（Ｎｉ）和Ｃｏ元素的异常特征,进而研究了组分的横向分带,矿化剥饼程度。与蔡家营大型铅锌银矿床的地球化学异常模式对比研究认为该铅锌银矿矿化点具有较大的找矿远景,推测在已知矿脉南侧和东侧深部应赋存有一定规模的盲矿体。  相似文献   

Plume and lithologic profiling with surface resistivity and seismic tomography     

Watson DB  Doll WE  Gamey TJ  Sheehan JR  Jardine PM 《Ground water》2005,43(2):169-177

Improved surface-based geophysical technologies that are commercially available provide a new level of detail that can be used to guide ground water remediation. Surface-based multielectrode resistivity methods and tomographic seismic refraction techniques were used to image to a depth of approximately 30 m below the surface at the Natural and Accelerated Bioremediation Research Field Research Center. The U.S. Department of Energy (DOE) established the research center on the DOE Oak Ridge Reservation in Oak Ridge, Tennessee, to conduct in situ field-scale studies on bioremediation of metals and radionuclides. Bioremediation studies are being conducted on the saprolite, shale bedrock, and ground water at the site that have been contaminated with nitrate, uranium, technetium, tetrachloroethylene, and other contaminants (U.S. DOE 1997). Geophysical methods were effective in imaging the high-ionic strength plume and in defining the transition zone between saprolite and bedrock zones that appears to have a significant influence on contaminant transport. The geophysical data were used to help select the location and depth of investigation for field research plots. Drilling, borehole geophysics, and ground water sampling were used to verify the surface geophysical studies.  相似文献   

A missing link in the historical development of hydrogeology   总被引：1，自引：0，他引：1  

Stephens DB  Ankeny MD 《Ground water》2004,42(2):304-309

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