An Eco-Friendly High-Effective Scale Inhibitor for High Salt Brine     

ZHANG Xin  SHAO Qianqian  CUI Zhaojie  TAN Xianfeng 《《地质学报》英文版》2014,88(Z1):408-409

正Now the mining of high salt underground brine has been an important aspect of salt lake mining,which is the necessary support to the development of national economy.With the change of underground geological  相似文献   

江西分宜下桐岭地区钨矿地质特征与成矿预测     

黄凝  徐平  袁晶 《江苏地质》2014,38(4):630-637

江西省分宜县下桐岭钨（钼铋）多金属矿床,以花岗岩体内、外的网脉型钨钼铋矿化为主,并发育少量大脉型钨钼铋矿体。在进行江西省钨矿资源潜力评价时,对该矿床1号、2号花岗岩体及钨矿成矿特征进行了资料收集和综合研究。按全国矿产资源潜力评价矿产预测有关技术要求,将其划归为岩体型钨矿,所在区域的预测类型归入＂下桐岭式＂岩体型。通过对该典型矿床地质特征、成矿要素、预测要素特征的综合分析,认为岩石类型、成矿时代、成矿环境、构造背景、矿体特征、控矿条件、化探和重砂异常是该钨矿的主要预测要素;在此基础上,对该预测工作区建造构造、成矿要素及预测要素等特征进行了归纳总结,认为大地构造位置、区域地层、区域主要断裂构造和区域岩浆岩、矿区断裂构造和成矿岩体、矿化类型、控矿断裂和地球化学异常特征等,是该区钨矿主要预测要素,并圈定了8个最小预测区。按地质体积参数法估算,其800 m以浅潜在资源量为24.98万t。  相似文献   

论石英脉型钨矿成矿系统的相对封闭性—以湖南瑶岗仙脉型钨矿床为例   总被引：6，自引：0，他引：6  

祝新友  王京彬  王艳丽  陈细音  傅其斌 《地质学报》2014,88(5):825-835

石英脉型与矽卡岩型是最重要的两类钨矿床,其成矿作用过程与成矿机制不同。矽卡岩型钨矿成矿作用经历了大规模隐爆过程,沟通了岩浆系统与地下水系统,体系中有大量大气降水的参与,成矿物质主要来自岩浆岩,岩浆热液体系与地下水体系的混合是大规模成矿的重要机制。石英脉型钨矿则不然,虽然发育大规模的控矿断裂体系,但成矿分带不明显,甚至发生逆向分带,大部分钨矿顶部以线脉带尖灭于砂岩中,矿床外围也不出现独立的铅锌矿体;一般划分不出明显的多成矿阶段,也不发育隐爆角砾岩;成矿流体温度、盐度变化范围小,无明显的沸腾流体包裹体组合,成矿流体的混合或降温演化过程皆不明显;成矿物质及流体都来自岩浆岩,成矿过程中无显著的外来成矿物质和/或大气降水的参与。与矽卡岩矿床相比,石英脉型钨矿成矿系统总体表现为相对的“封闭”性。石英脉两侧的云英岩化蚀变规模较小,石英的δ18O及流体包裹体δD变化很小,成矿体系的水/岩比例较低。形成黑钨矿石英脉的成矿流体可能并非简单的岩浆期后热液,而是一类含水相对低富含硅质和成矿物质的高温流体,通过快速充填形成矿床。  相似文献   

Effects of fracture grouting with sodium hydroxide during electro-osmosis on clay     

Jun Wang  Ziyang Gao  Lingyu Li  Hongtao Fu  Yuanqiang Cai 《Marine Georesources & Geotechnology》2013,31(2):245-255

ABSTRACT

Electro-osmosis is a foundation treatment method for clay that is not widely used because of its nonuniform consolidation effect and high cost. To overcome these limitations, this study investigates fracture grouting. To determine the optimal grouting method, anode grouting, polyurethane grouting, and fracture grouting were first compared in one-dimensional electro-osmosis consolidation tests using self-made model boxes under an equal electric potential gradient, and then different solution concentrations were tested. By comparing the current, drainage rate, and coefficient of energy consumption during the electro-osmosis process, as well as moisture content, electrical conductivity, and shear strength after the tests, the moisture and shear strength of clay after electro-osmosis were found to be significantly improved by adding chemical reagents at the fracture. In addition, the optimum concentration of fracture grouting was determined to be 1.5%, and the shear strength after testing of clay that had been treated with sodium hydroxide was found to be higher than that of the control group. However, the effects of fracture grouting in the early stage were clearer than the effects of fracture grouting at later stages.  相似文献   

Distinguishing human from animal faecal contamination in water: A review     

L. W. Sinton  R. K. Finlay  D. J. Hannah 《新西兰海洋与淡水研究杂志》2013,47(2):323-348

Management of faecal contamination of water would be improved if sources could be accurately identified through water analysis. Human faeces are generally perceived as constituting a greater human health risk than animal faeces, but reliable epidemiological evidence is lacking. United States waterborne disease data suggest that human‐specific enteric viruses account for over half the documented outbreaks. However, in New Zealand, where there is a high grazing animal:human ratio (increasing the relative importance of water‐transmissible zoonoses), it seems prudent to assume that human and animal faecal pollution both constitute a risk to human health. Irrespective of the relative risks, the ability to identify sources would assist in overall management of microbial water quality. Faecal streptococci do not appear to provide reliable faecal source identification. Human and animal sources, respectively, maybe distinguishable by two tests on Bifidobacterium spp.—growth at 45°C in trypticase phytone yeast broth and sorbitol fermentation. Different species of Bacteroides tend to be present in humans and animals, but poor survival in water is a problem. Phages of the Bacteroides fragilis strain HSP40 appear to be human specific, but low counts in effluent in some countries, including New Zealand, may limit their usefulness. Different F‐RNA phage subgroups appear to be associated with human and animal faecal sources. The actinomycete Rhodococcus coprophilus has potential as a grazing animal indicator but it is persistent, and existing culturing techniques are time consuming. The development of DNA‐based techniques, such as polymerase chain reaction (PCR), may assist in the assay of some microbial faecal source indicators. Various faecal sterol isomers offer the possibility of distinguishing between human and animal sources, and even between different animals. Washing powder constituents such as fluorescent whitening agents, sodium tripolyphosphate and linear alkyl benzenes, offer useful human source identifiers. It is unlikely that any single determinand will be useful in all situations, but statistical analysis of appropriate “baskets” of microbial and chemical determinands offers the possibility of identifying and apportioning human and animal faecal inputs to natural waters.  相似文献   

安徽宁墩地区金钨地球化学异常找矿远景   总被引：1，自引：0，他引：1  

陈富荣 《物探与化探》2010,34(2)

宁墩地区金、钨地球化学异常以Au、As、W、Bi元素组合为主,异常套合较好、分带明显,异常强度高、规模大,受北东向断裂控制。通过水系沉积物加密采样和土壤、岩石剖面测量及路线地质调查,该区存在次生晕异常和原生晕异常,查证方法技术有效。位于褶皱和断裂构造发育部位的异常,有Au、W等高背景花岗闪长斑岩脉的侵入,物质来源和热源充足,成矿地质条件优越。路线地质调查发现金矿化体四处,但与该区异常强度和规模不相称,尤其是在破碎带矿化蚀变岩石中,Au、W、Mo成矿元素与As、Sb、Bi伴生元素含量均较高,该区显示出较好的Au、W、Mo找矿前景。  相似文献   

硫酸钠亚型富锂卤水25℃等温蒸发过程的计算机模拟   总被引：5，自引：0，他引：5  

卜令忠  乜贞  宋彭生 《地质学报》2010,84(11):1708-1714

我国青藏高原上分布有许多盐湖,其中扎布耶等碳酸盐型盐湖、东台吉乃尔等硫酸镁亚型盐湖是著名的富锂盐湖,已成功开发生产出碳酸锂产品。青藏高原上还有许多硫酸钠亚型盐湖,其卤水锂浓度高,钾、镁、硼等有用成分丰富。针对这些盐湖资源,目前尚未进行开发利用研究。这些卤水的等温蒸发实验研究,是必不可少的关键工作之一。本文使用我们由Pitzer电解质溶液理论建立的Li+,Na+,K+,Mg2+/Cl-,SO24--H2O体系的热力学模型,对25℃下几种硫酸钠亚型富锂卤水等温蒸发过程进行了计算机模拟,预测蒸发过程中盐类矿物的析出顺序、卤水组成变化规律、钠、钾、镁、锂盐的饱和点,并在此基础上进行卤水蒸发过程物料平衡关系的理论计算等。本文对西藏3种硫酸钠亚型卤水和国外2种硫酸钠亚型卤水25℃等温蒸发过程进行了模拟。其析盐顺序的特点是:在第一个矿物石盐饱和析出后,接着析出的含钾矿物是钾芒硝,而不是钾镁矾类矿物。其后钾盐则会以钾岩盐形式析出。锂盐饱和后则主要以复盐Li2SO4.K2SO4形式析出。美国银峰卤水的模拟结果与实验蒸发过程完全一致,并给出其继续蒸发时的析盐状况。另4种硫酸钠亚型卤水的模拟结果不仅可以作为未来实验研究的基本参考和注意点,同样也可作为其盐田设计和工艺安排的基本理论依据。本文研究为该类型卤水资源综合开发利用工艺路线的确立提供理论参考。  相似文献   

中蒙边境沙麦-玉古兹尔地区钨和钨(钼)矿床地质特征, 形成时代和成因机理   总被引：7，自引：1，他引：6  

聂凤军  胡朋  江思宏  刘翼飞 《地球学报》2010,31(3):383-394

首次对横跨中蒙边境线的沙麦-玉古兹尔钨和钨(钼)矿化集中区代表性钨和钨(钼)矿床进行了系统研究。含矿花岗岩体锆石SHRIMP铀-铅同位素年龄为225.9±2.1 Ma, 钨(钼)矿石辉钼矿铼-锇同位素年龄为224±6.2 Ma, 二者具有明显的成因联系。无论是沙麦钨矿床, 还是玉古兹尔钨(钼)矿床, 其主要成矿期石英流体包裹体数据十分相似, 属中-高温度和中-低盐度NaCl-CO2±H2O流体。考虑到含矿花岗岩的?Nd(t)值均为正值, 同时结合其它地质证据, 可以推测, 钨和钨(钼)矿床是岩浆流体与大气降水相混合的产物。印支期中酸性岩浆活动不仅为成矿体系“注入”大量成矿物质, 而且为热液的对流循环提供了动力和热力来源。研究结果表明, 沙麦-玉古兹尔地区钨和钨(钼)矿床成矿作用与印支期构造-岩浆活动有关, 属与深成侵入岩有关的中-高温热液脉型金属矿床。  相似文献