基于多维概率分布的多金属矿床储量估算模型

为解决不同边界品位下多金属矿床的储量快速估算问题,针对多金属矿床有用组分之间具有相关性的特点,基于多维概率分布函数建立了多金属矿床储量估算数学模型.以某金铜矿床为例,分析证明了矿床中金、铜品位的概率密度呈对数正态分布,并对金、铜品位分布的相关性特征进行检验.在此基础上将一维概率密度扩展至多维,建立了金铜矿床品位分布的多维概率密度函数,得出了不同边界品位下矿床保有的资源储量,并进行了可靠性验证.结果表明,模型的计算误差在10%以内,符合储量管理的精度要求.     

云南省香格里拉市伊隆迈铜多金属矿区物探异常特征

伊隆迈多金属矿位于西南"三江"义敦岛弧的南段东部斑岩成矿带中。以地质勘查资料为依据,通过开展物探工作获得了以下成果:60线长剖面的重力测量在2 780~4 500区间获得了明显的相对低重力异常,推断该区间深部存在隐伏中-酸性岩体;激电中梯扫面工作在测区东西两侧各获得一个北北西向展布的高极化率条带,推断这两个条带与玄武岩和黄铁矿化凝灰岩有关;利用放射性伽马总量测量对平面上石英二长斑岩脉的走向延伸情况进行了推测;利用高密度电法、激电测深及音频大地电磁测深对该区深部的地质特征进行了推测,根据高密度电法工作成果推断,石英二长斑岩在埋深30m范围内产状陡倾略偏南西,闪长玢岩前期侵入灰岩地层并形成较陡的接触面,石英二长斑岩在后期侵位于闪长玢岩与灰岩的接触面。     

激发极化法在河北杨树沟矿区银多金属矿勘察中的应用

介绍了工作区的地质概况,利用激电中梯扫面和温纳测深对河北杨树沟银多金属矿进行了物探,其中激电中梯扫面圈定了构造带的位置,温纳测深准确测定了矿化体的空间赋存形态。     

三相氧化法富集分离大洋多金属结核中有价金属

大洋多金属矿是以铁锰氧化物为主相的复杂矿物,利用大洋多金属矿三相氧化法提取锰,并使铁铜钴镍富基于渣中的方法是富集分离有价金属的新途径.最佳反应条件是:温度240℃;时间2 h;碱锰的物质的量的比为45;通气量0.5 m3·h-1;锰粉粒度为-200目.铁镍的固相富集率接近100%,铜钴大于93%.液相氧化反应后Fe,Cu,Co,Ni等金属基本上被分配到渣中,赋存在矿物中的变价金属氧化物对锰酸钾的反向分解有促进作用,初步实现了这些金属与Mn的分离.     

人工合成1nm锰矿相与多金属结核的富集机制研究

利用人工合成的 1nm锰矿相与铜、钴、镍等二价金属阳离子的离子交换实验的结果表明 :人工合成 1nm锰矿相具有强烈的金属阳离子交换能力 ,其交换能力大小顺序为Cu2 +>Co2 +>Zn2 +>Ni2 +;有机质存在对离子交换起到抑制作用 .阳离子交换是多金属结核成矿后期的重要途径 .从镍离子较弱的交换能力和其在结核中较高含量的矛盾中可推测 :铜、钴、镍等有价金属元素在多金属结核中的富集 ,可能是生物成矿和化学作用等多种因素共同作用的结果     

PGE patterns of ores of Dajing Cu-polymetallic deposit in Linxi County,Inner Mongolia: Indicator to source of metallogenic elements

By comparing PGE patterns of sulfide ores with that of basic-ultrabasic dikes occurring in the Dajing Cu-polymetallic deposit, we discover that there are similar positive slopes between the basic-ultrabasic dikes and the black ores composed mainly of sphalerite and galena, reflecting affinity of their source. The PGE patterns of the yellow ores composed basically of chalcopyrite, arsenopyrite and pyrite are actually different. One is close to the pattern of the mantle lherzolite, and others resemble the pattern of the basic rocks. However, the concentrations of Ru are higher in the yellow ores, reflecting that sulfur attains or approaches saturation in their parent magma. The PGE characteristics of ores and dikes show that the magmas derived from the deep of crust and the metallogenic elements were supplied mainly by growth material of the crust. In addition, the mantle-derived magma also offered some elements.     

Nanometer properties of oceanic polymetallic nodules and cobalt-rich crusts

An ammonia leaching process was utilized to extract Co, Ni and Cu from oceanic polymetallic nodules, whereas an acid leaching process was utilized to extract Co, Ni, Cu, Zn and Mn from cobalt-rich crusts. Both processes produced nanometer materials—ammonia leaching residue and acid leaching residue. A systematic study was conducted on the phase, composition and physicochemistry properties of these residues. The result shows that both residues contain a large amount of nanometer minerals. Ammonia l eaching residue mainly consists of rhodochrosite, with the average grain diameter of 17.9 nm; whereas the acid leaching residue mainly consists of well-developed bassanite, with the average grain deameter of 9.5 nm. The bassanite also has a microporous structure, the volume of the pore space is 1.23 × 10⁻² mL/g. Both the ammonia and acid leaching residues have a large specific surface area, and they display a strong adsorption capacity to saturate sodium chloride vapour, N₂ and SO₂. Both residues have high contents of rare earth elements, and most of these elements exist in the state of ionic adsorption. The content of σ FeO is high. The P₂O₅ enrichment is observable in acid leaching residues. The unique composition and nanometer solid properties of the leaching residues displayed their potential value and promised a bright future for their application in the field of environmental protection and materials.     

黔西北某地伴生多金属低品位铁矿工艺矿物学研究

以化学分析、化学物相分析、透反射显微镜及EPMA为主要研究手段,对黔西北某地伴生多金属低品位铁矿的工艺矿物学特征进行了详细研究。该区含矿岩石为一套以火山成因为主的火山碎屑岩,矿石中有价元素除铁外,伴生有钛、铜、镓、铌等。载铁矿物工艺矿物学研究结果表明,矿石中铁主要以褐铁矿形式存在,与粘土矿物常常混杂出现,分布不均,团块大小差异也大,矿物间的嵌布关系复杂,提示依靠传统物理选矿难达到有用矿物的富集。除褐铁矿外,矿石中存在少量硅铁钛金属互化物。     

山西繁峙县金鸡沟矿区多金属矿地质特征及成矿规律

繁峙县金鸡沟多金属矿区位于华北地台北缘,山西断隆—五台隆起北东部,矿区经多次构造变动,在区内形成了一系列断裂破碎带,后经热液多次充填、叠加,金、多金属元素得到进一步的富集,在部分有利地段形成了金、多金属矿体。通过对地质、矿床特征、控矿因素的分析研究,总结出了区内构造发育,岩浆活动频繁,矿产资源丰富,周边已知金属矿产有金、银、铜、铅、锌、钼、铁矿床多处,成矿地质条件良好,找矿潜力巨大。     

吉林省磐石市小红石砬子铅锌块状硫化物矿床的特征及意义

磐石市小红石砬子银铅锌多金属矿区处在磐石—永吉—双阳海西期花岗岩与石炭系碳酸岩建造的外接触带,产在中生代北西向线性火山断陷盆地内,位于海西晚期近圆形的火山穹隆构造南东部,属于块状硫化物型银铅锌多金属矿床;通过对该矿床地质特征的描述,区域分布规律及其成矿机理的探讨,为吉中地区寻找类似矿床打开了思路。