安徽铜山铜矿床地球化学特征及其成因

铜山铜矿床不同矿石类型在硫、铅、氢、氧同位素，硫化物矿物中微量元素，稀土元素，矿物生成温度等地球化学方面明显地显示了内生成矿作用和外生成矿作用两种不同特征。结合成矿地质条件所进行的矿床成因分析表明，该矿床为一矿石矿质和含矿热液（介质水）分别来自燕山期中酸性岩浆和地下热雨水的多来源矿床，并据此建立了成矿模式。     

吉林东南部早寒武含铜层及其形成的古地理分析

吉林省东南部早寒武世晚期地层中含有数层含铜层，它们主要赋存在红色岩层所夹的灰绿黄绿色岩层之中。本区含铜层的形成与当时富氧阶段中的缺氧时期息息相关；而且该类型含铜层主要产自滨海或滨浅海地带，受当时古地理严格控制     

柿竹园钨锡钼铋矿床合理的勘探方法及储量比例探讨

本文剖析了柿竹园钨锡钼铋矿床地勘阶段地质观察粗浅，勘探投入超前，探明储量积压、Ｂ＋Ｃ级储量比例偏大等不合理的勘查工作及其原因。在此基础上，探讨矿区合理的勘探程度，储量比例及由此带来的经济效益。     

陆相火山岩铜矿床成矿条件研究

研究陆相火山岩铜矿床的成矿条件，对于多发现新的铜矿资源有着重要的意义。本文就陆相火山岩型铜矿床的实际存在，大陆玄武岩型铜矿的成矿系列，大陆裂谷的成矿环境和热液成矿作用等方面进行讨论。     

狮子山铜矿岩壁X取样研究与应用

本文主要介绍了应用 X射线荧光方法在狮子山铜矿进行岩壁 X取样的技术和工作过程 ,提出了一些克服岩壁 X取样影响因素的方法。并对使用效果进行了评价     

毛登锡铜矿床成矿分带及其成因讨论

毛登矿主档是产于花岗斑岩内，外接触带的热液脉型锡铜矿床在容矿构造、矿脉类型及矿石类型、金属矿物组合及主要金属矿物标型，热液蚀变及元素地球化学等诸方面，自花岗斑岩向外，显示出明显的顺向（侧向）脉动分带。     

山东沂南金场矽卡岩型金铜矿床地质地球化学特征及矿床成因

金场金铜矿床是沂沐断裂带西侧与中生代次火山作用有关金铜矿床的典型代表。该矿地质地球化学特征的综合研究表明“其成矿岩体具有富碱、富钾、富轻稀土和大离子亲石元素的特点，是由成熟度较高的中－下部地壳物质经重熔再生的 产物。     

楚雄盆地铜、盐、有机质相互作用与砂岩铜矿生成

矿床的有机地球化学研究表明:楚雄盆地含煤、含铜和含膏盐建造中的有机质在来源、类型和成熟度上是不一致的。成岩期干酪根降解形成的短链羧酸是矿源层中铜活化的重要因素,石油烃是矿质搬运的重要载体。改造成矿期,天水淋滤膏盐展形成富SO_4~(2-)的下渗氧化性流体,为改造成矿提片供了硫源。另一方面,来自基底的含矿流体沿同生断裂上涌,混染煤系地层形成还原性流体,沿次级断裂进入到高渗透的砂岩储集层。当两种流体在砂岩中相遇时,发生氧化-还原作用而形成改造期矿体。     

Estimation of in situ viscoelastic parameters of weak floor strata by plate-loading tests

Summary This paper explores an approach to estimation of the viscoelastic parameters of weak floor strata using plate-loading tests. Mathematical equations are derived to describe deformation-time history for the standard Burgers model under three-dimensional stress-strain conditions, which are verified with a finite element model. A number of time-dependent in-mine plate-loading tests were conducted and the values of the viscoelastic parameters were estimated based on the derived equation. It is shown that large discrepancies between the parameter values estimated from the plate-loading tests and those acquired from the in-mine convergence data are the results of neglecting adjacent pillar interaction. Finite element modelling was conducted to investigate the effects of adjacent pillar interactions upon the pillar settlement. Based on the finite element analyses, a correction curve was developed to adjust the viscoelastic parameter values to take into account the interaction between adjacent pillars. With the correction, the parameter values estimated from the plate-loading tests compared favourably with those acquired from the in-mine convergence results.     

Feasibility and cost of creating an iron-phosphate coating on pyrrhotite to prevent oxidation

 Acid mine drainage (AMD) occurs when sulfide minerals are exposed to an oxidizing environment. Most of the methods for preventing AMD are either short-term or high cost solutions. Coating with iron phosphate is a new technology for the abatement of AMD. It involves treating the sulfide with a coating solution composed of H₂O₂, KH₂PO₄, and sodium acetate as a buffer agent. The H₂O₂ oxidizes the sulfide surface and produces Fe³⁺ so that iron phosphate precipitates as a coating on the sulfide surface. Experiments performed under laboratory conditions prove that an iron phosphate coating can be established on pyrrhotite surfaces with optimal concentrations of the coating solution in the range of: 0.2M/0.01M H₂O₂, 0.2M KH₂PO₄, and 0.2M sodium acetate NaAc, depending on the experimental scale. Iron phosphate coating may be a long-term solution to the problem of AMD. The method would be easy to implement; the reagent cost, however, is not low enough, although it is lower than the conventional treatment with lime. Received: 30 March 1995 · Accepted: 6 September 1995