云南个旧锡矿区矿业活动对土壤重金属的累积贡献   总被引：1，自引：0，他引：1  

黄玉  蔡保新  王宇  李昊熹  柴金龙 《地质通报》2014,33(8):1167-1174

矿业活动是土壤重金属累积的重要原因之一。分析云南个旧锡矿区矿业活动区、与矿业活动区地质条件相同的矿业活动影响区和未受矿业活动影响的参照区表层土壤7种重金属元素之间的相关性,以参照区表层土壤重金属总量、参照区土壤重金属似背景值分别评价矿业活动对矿业活动区和矿业活动影响区土壤重金属的累积贡献量和贡献率。结果表明,矿业活动区重金属累积贡献率排序为PbZnAsCuCdCrHg,影响区重金属累积贡献率排序为PbZnAsCuCdCrHg,Pb、Cd、As、Zn、Cu与矿业活动关系密切,矿业活动区Pb、Cd、As均表现为极高累积和极高风险,应作为矿业活动治理的重点元素。  相似文献   

云南光茅山地区斑岩体地质特征及构造环境分析——来自主量元素地球化学方面的证据     

徐恒  ;崔银亮  ;荣惠锋  ;张苗红  ;梁庭祥 《矿产与地质》2014,(4):479-486

对云南光茅山地区斑岩体的岩石学和主量元素地球化学特征进行分析,研究区斑岩体的SiO2、Al2O3、Na2O和K2O的平均质量百分数分别为67.84%、15.39%、3.40%和4.37%,里特曼指数平均为2.40,固结指数和分异指数平均值分别为11.14和82.95。主量元素特征表明:其属SiO2过饱、过铝质和富碱高钾的钙碱性系列的斑岩体,属于造山期后A型花岗岩;其形成于喜山期陆陆碰撞接壤处的地壳消减带构造环境。研究区斑岩体在主量元素地球化学特征和成岩构造环境方面,不同程度的表现出与马厂箐斑岩体的相似性,具有寻找与马厂箐斑岩型矿床相同模式的铜、钼(金)多金属矿床的前景。  相似文献   

砚山炭房村供水水文地质特征分析     

张华  刘海峰  康晓波 《云南地质》2014,33(3):426-432

云南砚山县炭房村,处于南丘河（属珠江水系）与盘龙河（属红河水系）的分水岭地带,区域地貌为滇东南高原斜坡地带,炭房附近地貌以峰丛洼地为主.通过初步调查在炭房村水文地质钻孔周边开展物探激电测深电法,确定钻孔孔位,通过钻孔实施,水量5.145m3/d,几乎为干孔.总结这—失败原因,对今后该地区的水文地质钻探提供资料.  相似文献   

金矿石堆浸法中载金炭解析工艺的改进     

赵勤喜 《云南地质》2014,(1):114-116

在载金炭的解析生产过程中,有多种因素如解析柱的结构、解析温度等都会影响到载金炭的解析效果,把握并控制好这些环节成为解析的关键,在实际生产中对解析柱的结构进行改进使得解析效果有了明显的提高.  相似文献   

香格里拉东坝多金属勘查区找矿前景分析     

王璐  邹磊  胡文君 《云南地质》2014,(2):237-239

通过总结香格里拉县东坝铜金多金属勘查区的地质特征,类比邻近东炉房矿区的地质特征及化探异常,两者在许多方面具有很多的相似性,所以认为东坝勘查区具有找矿的良好前景.  相似文献   

云南重点岩溶流域水文地质及环境地质调查成果评析   总被引：2，自引：0，他引：2  

张华  王宇  张贵 《云南地质》2014,(2):259-263

2003～2012年云南岩溶水文地质及环境地质调查共安排10个地质调查项目,取得了重要的成果和显著的经济效益.完成成果报告12个,数据库11个,发表论文19篇,专著3本,建立岩溶水开发示范项目40项,解决85294人的缺水困难.成果资料为地方经济发展及抗旱救灾等提供了重要的基础水文地质资料.  相似文献   

广西鹿寨铜铅锌矿区成矿条件及找矿前景     

贺胜辉  荣惠锋  徐恒  张苗红 《四川地质学报》2014,(1):25-28

铜铅锌矿区位于广西著名的大瑶山西侧铜铅锌多金属成矿带的北段中西部。通过对矿床成矿地质背景、矿区地质以及该区与整个成矿带成矿地质条件对比分析等综合研究,对找矿前景作出了简要分析。  相似文献   

四酸溶样电感耦合等离子体发射光谱法测定地质样品中的钪     

王学伟  彭南兰  唐琦平  金婷婷 《岩矿测试》2014,33(2):212-217

分析地质样品中钪的含量,国家标准方法是采用过氧化钠熔融,过滤分离后电感耦合等离子体发射光谱法（ICP-AES）测定,过程繁琐,样品前处理引入大量盐类且分析结果精度不高,不能适应当前矿产勘查快速准确检测的需要。本文建立了采用硝酸、盐酸、高氯酸和氢氟酸处理样品,ICP-AES测定地质样品中钪的分析方法。选择5%盐酸为溶液介质,干扰元素含量低于2%时运用干扰因子校正法（IEC）优化谱线强度以及适量稀释溶液降低基体效应,提高了分析的准确度和精密度。方法测定范围宽（0.00003%~10%）;检出限为0.0016 μg/mL,优于国家标准方法检出限（0.004 μg/mL）;方法回收率为97.0%~99.3%,方法精密度（RSD,n=6）为0.4%~2.3%;国家一级标准物质的测定值和标准值吻合,分析结果准确可靠。虽然酸溶法不能完全溶解所有类型的地质样品,但对区域环境条件要求不高、简便快捷,本法以酸溶法替代碱熔法处理样品,避免了待测组分和干扰物质的引入,对ICP-AES测定钪的稳定性有较大改善,适用于批量快速分析地质样品中的钪元素。  相似文献   

A Review of Daytime Atmospheric Optical Turbulence Profile Detection Technology     

《Chinese Astronomy and Astrophysics》2023,47(2):257-284

Atmospheric turbulence has been confirmed as the primary source affecting the quality of ground-based telescope image. To reduce the effect of atmosphere, a good site should be selected, and adaptive optics (AO) should be installed for the telescope. In general, the daytime atmospheric turbulence is more intense than that at night under the effect of solar radiation. Numerous solar telescopes have built AO systems worldwide. Conventional AO is only capable of improving the image quality in a small field of view, whereas it cannot satisfy the needs of a large field of view. The novel wide field adaptive optical system is capable of achieving a large field of view and high-resolution images, whereas the atmospheric turbulence profile should be accurately detected, which is the prerequisite and key parameter of the novel AO system. Moreover, the astronomical high-resolution technology in accordance with the turbulence imaging theory requires more detailed detection of turbulence. Accordingly, a brief review about the latest detection technology of the daytime optical turbulence profile is valuable for astronomical observations. Besides, the parameters of atmospheric turbulence are briefly introduced. Subsequently, SNODAR, SHABAR, MOSP, DIMM+, A-MASP, and other detection technologies of the stratified atmospheric turbulence for daytime are primarily presented, and the advantages and disadvantages of the different technologies are summarized.  相似文献   

Advances in 3D Reconstruction of Coronal Mass Ejections     

《Chinese Astronomy and Astrophysics》2023,47(1):1-53

Coronal mass ejection (CME) is the large scale magnetized plasmoid ejected from the Sun, which brings huge amount of magnetic flux and plasma into interplanetary space. An earthward CME will interact with the magnetosphere of the Earth, and invokes the substorm and the other phenomena of the space weather as it approaches to the Earth. The 2-dimensional data provided by the current observational techniques cannot describe the true magnetic structure and the plasma distribution of CMEs comprehensively. We need to look into the 3-dimensional structure and the associated three components of CME speeds in order to predict the time when an ICME (Interplanetary CME) reaches the Earth, and the potential consequent impact on the Earth and the nearby environment. In this paper, 3D reconstruction methods of CME based on existing imaging observations are introduced, including two kinds of reconstruction methods based on coronagraph data and heliosphere imager data, and CME-driven shock wave 3D reconstruction methods with high correlation with CME imaging reconstruction. Each method shows apparent advantages in dealing with specific events, but its weakness and necessary constrains to its applications exist as well. Results obtained via various methods are compared in this work, and we found that CME velocities and moving directions deduced from these methods are fairly close to one another, which shows high reliability of these methods. Finally, the hot topics related to the 3-dimensional reconstruction of CME (ICME) and the relevant development in reconstructing methods are also discussed.  相似文献