用含锰废水生产高纯碳酸锰

介绍了用含锰废水生产高纯碳酸锰的原理和工艺条件,生产出的高纯碳酸锰产品质量可以达到了ＧＢ１０５０３－８９Ⅱ型一等品标准,此法具有较好的经济效益和环境效益。     

长江中下游中生代沉积盆地的含矿建造

本文讨论了长江中下游地区中生代沉积盆地演化与成矿作用的关系。印支旋回本区在挤压构造环境下，形成坳褶盆地和海退序列的含矿建造；早中三叠世在局限台地-萨布哈环境下形成周冲村组富铁碳酸盐、铅锌、膏（盐）等合矿建造；中三餐世与三角洲前线亚相有关的沉积环境下形成黄马青组含铜砂岩建造。南象运动是一次变格运动，其界面直接控制象山组砂岩铀矿。晚自垩世与拉伸引张构造有关，形成断陷盆地中的巨厚膏盐矿产．作者认为盆地演化及卤水流体是本区多旋回成矿作用最本质的因素。     

Characteristics of metal enrichment in Deep Bay, Hong Kong

Abstract: Sediment cores, suspended particles and overlying water were collected in Deep Bay, Hong Kong. Enrichment of Zn in surface sediments in the landward direction and the decreasing of exchangeable Cd, Ni and Zn in sediment from the inner bay to the outer bay indicated the influence of anthropogenic pollutants discharged from the riparian runoffs.     

津巴布韦大岩墙Darwendale次岩浆房铂族元素成矿分布和成矿机制探讨

大岩墙超铁镁质岩层上部主要有三个硫化物带,铂族元素(PGE)主要分布在这些矿带中,尤其富集在硫化物带的底部。下部两个矿带属星散硫化物成矿,二者距离较远;上部矿带铂族元素品位较高,分布在十分薄的岩层中。目前对层状硫化物矿床形成的模式尚未进行足够的研究。初步认为下部两个矿带是硫化物从硅酸盐岩浆中经连续的结晶分凝作用形成;上部矿带是由于岩浆房底部比较原始的岩浆与顶部伴生浆液混合形成。     

贵溪冷水坑银矿田银元素富集规律研究

贵溪冷水坑银矿田具超大型规模,矿化型式多样,主要有产于花岗斑岩体内及接触带附近的斑岩型矿化和产于上侏罗统打鼓顶组火山岩中层控叠改型矿化二大类。它们各自拥有不同的空间展布、矿物组成、结构构造、围岩蚀变和伴生元素特征。深入探讨银元素的空间分布特征,可以开拓矿田深部及外围找矿的思路。     

云南土壤锰元素背景值及其特征研究

对云南省土壤锰元素背景值进行了采样分析,结果显示:锰元素含量呈对数正态分布,中位值560 0mg/kg,几何均值486 5mg/kg,95%置值区间18 3～1648 4mg/kg。并对其特征进行了研究。     

Sedimentation of short cylindrical pollutants with mechanical contacts

Lattice Boltzmann method and elastic particle collision model were used to investigate the sedimentation of short cylindrical pollutant particles with mechanical contacts for varying bulk number density ε and terminal Reynolds number ReT. The corresponding experiments were performed as a comparison. The clusters of pollutant particles with an inverted “T” structure were observed, the pollutant particles for high ε and large ReT scattered wider than that for low ε and small ReT. The sedimentation velocities increased suddenly at the initial stage, then decreased drastically, after that swayed around and approached to a steady value. The time to steady state did not depend on ε and ReT. The effect of particle interactions was to hinder the average sedimentation velocity, and hindrance was directly proportional to ε. The orientation distributions of pollutant particles depended on ReT and ε, especially on the former. Both the standard deviations of vertical and horizontal velocity, the former was larger than the latter, were nearly independent on ε and ReT.     

从废旧锌锰电池中回收锌和锰的工艺研究

废旧锌锰干电池经过剖开、焙烧处理，去除汞和碳粉，再用硫酸浸取，滤液采用沉淀法分离锌和锰。锌和锰的回收率分别为94．5％和93．6％。     

天然水中Ca^2＋的双波长分光光度法测定

依据胶体颗粒与入射光有A=φε~(-2)λ~(-ε)关系,又φε~(-6)与CaC_2O_4-乙醇胶体体系中的Ca~(2+)浓度呈正相关,φ、ε分别为胶粒的粒数函数和粒径函数。选择两个测定波长λ_1和λ_2,解联立方程,计算φ和ε,由φ和ε求Ca~(2+)浓度。方法的线性范围为0～20μg/ml,最低检出浓度为0.4μg/ml。     

西藏措勤尼雄地区地面磁法测量及其地质意义

在《西藏措勤-昂仁地区铁铜矿评价》工作中,安排了1∶ 5万地面磁法测量.地面ΔT表明：整个工区属磁异常区,表现出北西低、南东高的总趋势.通过对磁测资料的转换处理,发现磁场特征与青藏高原中西部航磁调查所反映的地球物理特征基本吻合,反映了全工区磁场的变化特征,证实了藏C-99-297航磁异常的存在,应为矿致异常,可以指导青藏高原中西部找矿工作.通过对磁测剖面数据的推断,结合异常查证,在全工区圈出一批具有找矿意义的异常,为今后该地区基础地质研究和矿产资源评价提供了可靠的地球物理资料,并为今后在青藏高原开展矿产资源评价工作提供了切实可行的工作思路.