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1.
金属矿山隐伏矿找矿预测理论与方法   总被引:1,自引:1,他引:4  
针对金属矿山隐伏矿找矿预测的特点和难点问题,简要介绍了矿床模式、成矿系列、成矿系统、多因复成成矿、地质异常理论等地质找矿预测的基本理论,以及模型找矿预测方法的内涵和发展趋势;重点介绍了物化探新技术新方法的性能特点和在隐伏矿找矿预测中的应用前景;对数学地质、地理信息系统、找矿技术方法的有效性定量评价等新技术新方法进行了扼要介绍。  相似文献
2.
Acid mine waters have the potential to seriously impair the environmental quality of aquatic systems long after mining activities have ceased. This detailed study of dissolved and particulate metal fluxes from adits, drains and streams in the River Tamar catchment, southwest England, showed that seven specific sources, of the 25 adits and streams surveyed, accounted for more than 75% each of the 13 t a− 1 Fe, 4.3 t a− 1 Mn, 4.2 t a− 1 Cu, 3.6 t a− 1 Zn and 1.4 t a− 1 As that we estimated to be discharged annually from the abandoned metalliferous mining area centred around Calstock and Gunnislake. Upstream of this study area, widespread multi-metallic mineralisation contributed to the flux of Fe, Mn, As, Co, Cu and Zn within the River Tamar. Simple mass balance calculations indicated that a large proportion (≥ 50% for most dissolved and particulate metals) of the metal flux in the River Tamar was unaccounted for by our survey, and therefore is likely to have an important diffuse component, which is subject to ongoing investigations. Potential impacts of mine contamination on the estuarine environment are discussed. The study provided information necessary to prioritise monitoring and remediation efforts in the context of sustainable catchment management.  相似文献
3.
In this study we investigated the sulphidic mine tailings from Frongoch and Grogwynion, two abandoned lead zinc mines in mid-Wales, UK. Despite falling within the same ore field the mine waste characterisation has identified differences in the tailings from the two sites. Bulk concentrations range from 10 to 52 g kg− 1 for Pb, 1.1 to 2.9 g kg− 1 for Zn in Grogwynion and from 1.0 to 130 g kg− 1 for Pb, 11 to 110 g kg− 1 for Zn in Frongoch. An experimental (European standard leaching tests TS 14429 and TS 14405) and geochemical modelling approach was used to study the leaching composition as a function of pH and liquid/solid ratio. There was little correlation between the tailings bulk metal concentrations and the leachate composition, but variations in Pb and Zn concentrations were found to be consistent with control of dissolved Pb and Zn by secondary minerals and the mechanisms of dissolution/precipitation/sorption involving them. Specifically, the Grogwynion mine tailings with near-neutral pH have predominantly lead and zinc carbonates controlling Pb and Zn solubility in the leachates, whereas the Pb and Zn concentrations in Frongoch leachates are best modelled with a surface complexation model for metal sorption to oxyhydroxides. The different speciation results in a greater sensitivity of Grogwynion tailings to acidification with a potential release of Pb in solution up to 10 times higher than in Frongoch, despite similar bulk Pb concentrations. At acid pH, Zn is similarly dissolved to a greater extent in Grogwynion than in Frongoch tailings. There was no evidence of sulphide oxidation during the batch and column leaching tests and the suitability of using these European leaching standards for the characterisation of sulphidic mine waste materials for waste management purposes has been considered.  相似文献
4.
针对金属矿山泥石流发育与潜势度的关系,对影响矿山泥石流发育的主要因素进行综合分析,确定其隶属函数,采用层次分析法确定各影响因素的权重系数,并应用模糊数学理论的方法来判定金属矿山泥石流发育潜势度的级别,通过确定潜势度的级别对矿区内地质灾害进行定量化评价确定灾害等级,为金属矿山泥石流地质灾害的防治提供依据。  相似文献
5.
CSAMT法具有分辨率高、探测深度大、工作效率高等优点,已广泛应用于勘查领域。本文通过实例介绍了CSAMT法的基本原理及方法技术,以及在老矿山勘查深部铜锌矿体中的应用及效果。  相似文献
6.
从大地构造位置及区域成矿背景来看,卫宁北山地区具备寻找到大型多金属矿床的良好前景。笔者对黄石坡沟典型矿段的研究,证明了该区广泛出露的石英闪长玢岩与成矿的关系非常密切。为了确定该矿床的成矿时代,首次使用锆石微区定年技术,对二人山、金场子等典型矿段中闪长玢岩内的锆石进行了年龄测定,确定了该区有2期岩浆侵入活动,2期岩浆侵入均与该区成矿关系密切。笔者还系统研究了该矿区的成矿类型,认为其总体上是一个统一的构造-岩浆热液成矿系统,目前已发现的矿床的成因类型属于浅成中-低温热液矿床,其工业类型属于构造蚀变岩型矿床。  相似文献
7.
张飞雨 《福建地质》2011,30(4):313-319
在上杭县紫金山矿田温屋多金属矿区勘查工作中,综合运用了磁法、激发极化法和激电测深法等多种物探勘查方法,取得较好的成果,对进一步评价物化探异常、寻找成矿有利地带具有指导意义。  相似文献
8.
多金属矿区由于含矿岩体结构与岩性的特殊性,地震反射波法一般应用效果较差。利用地面长排列接收到的初至波场信息建立初始速度模型,针对复杂地表和介质条件下,利用旅行时线性插值射线追踪方法(LTI方法)进行的初至波射线追踪正演模拟以及带松弛因子的联合迭代重建算法(SIRT)进行速度层析反演,获取与矿体或岩体的结构与岩性变化有关的速度场信息,以求解探测目标的分布范围和展布特征。结果表明,反演速度场中的异常变化带与地表地质调查结果中的矿体分布以及断裂构造吻合较好。因探测深度可达到数百米,可为浅层隐伏矿体和构造等的确定提供较可靠的依据,该方法技术可行。  相似文献
9.
金属矿地震勘探中原始数据的信噪比很低,多种干扰混杂在记录中,常规去噪手段难以达到理想效果。针对金属矿地震数据中强线性干扰,设计了f-k滤波、Radon变换方法二级衰减;针对强随机噪声,设计Radon变换以及Curvelet域组合变换法二级衰减,组成了f-k滤波法、Radon变换及Cur-velet域组合变换法串联去噪方法。应用于金昌金属矿多类混杂强噪声的地震实际数据中,大幅提高了数据的信噪比,经验证本文方法实用、有效。  相似文献
10.
金属矿山尾矿是一种含有微量金属矿物和大量非金属矿物的二次资源,近十年来中国金属矿产开发利用与金属尾矿持续堆积一直呈高速增长状态。经初步估算,仅2011年中国尾矿排放量就达13~14亿吨,但当前我国尾矿综合利用率尚不到10%。为了更有效的开发利用中国尾矿资源,本文在分析尾矿基本特征及十年来中国金属矿产资源开发与尾矿堆积现状的基础上,总结了当前尾矿综合利用两大途径—尾矿再选、尾矿整体利用两个方面的研究现状及取得的一些成绩。提高尾矿资源的综合利用率不仅是当前部分矿山解困的出路之一,而且可以带来长期的经济、社会、环境效益。  相似文献
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