辽宁四合顺硫铁矿地质找矿分析

通过对辽宁四合顺硫铁矿床成矿地质背景条件、矿床体空间展布特征、矿石及蚀变矿物组合的分析研究,得出四合顺铁矿属中一高温热液充填交代型矿床。硅化、绢云母化、绿泥石化等蚀变矿物组合是其主要的找矿标志,结合地球物理和地球化学异常,指出了该区地质一地球物理_±也球化学找矿方向,实现区域深边部找矿突破。     

新疆青河县沙尔布拉克金矿地质特征及远景评价

青河县沙尔布拉克金矿区处于克兰铜、铅锌、金、铁、银、稀有金属、白云母成矿带,成矿地质条件优越。文章通过对矿区地质、矿化蚀变、矿体特征分析,总结于玛因鄂博脆-韧性剪切带找金之远景,进一步开展综合地质找矿工作有望发现具有工业意义的金矿床。     

焦家金矿床地球化学及深部矿体预测

焦家金矿床是破碎带蚀变岩型金矿（又称“焦家式”金矿）的代表。在对其关键区段重点研究的基础上,结合地球化学、构造演化和成矿作用的研究成果,建立了焦家金矿床地球化学勘查模式,预测并确立了焦家金矿深部存在第二成矿富集带盲矿体,并且认为这种规律可扩展到整个焦家金矿田。     

阜新排山楼金矿南带两家子金矿区矿床成因及找矿方向探讨

两家子金矿是辽宁省矿产勘查院2011年地球化学异常查证时,发现的新型金成矿带。通过对区域地质、矿体地质、地层、矿床的研究,为在该区找矿提供了重要理论依据。     

阜新排山楼金矿南带两家子金矿区矿床成因及找矿方向探讨

两家子金矿是辽宁省矿产勘查院2011年地球化学异常查证时,发现的新型金成矿带。通过对区域地质、矿体地质、地层、矿床的研究,为在该区找矿提供了重要理论依据。     

黑龙江258岩金矿床地质特征及找矿潜力研究

258高地岩金矿体产于侏罗世花岗闪长岩侵入体中,金矿体呈北西向雁行式排列,含矿岩石为碎裂蚀变花岗岩,围岩蚀变为强硅化、黑云母化、钾化等。该矿床为与闪长玢岩侵入体相关的斑岩型铜金矿床,笔者对矿区内地质、物探和化探进行了综合的分析研究,认为该区具有较大的找矿前景。     

阜新排山楼金矿南带两家子金矿区矿床成因及找矿方向探讨

两家子金矿是辽宁省矿产勘查院2011年地球化学异常查证时,发现的新型金成矿带。通过对区域地质、矿体地质、地层、矿床的研究,为在该区找矿提供了重要理论依据。     

湖南省醴陵团山背金矿区地质、物化特征及找矿

团山背金矿区位于湖南省醴陵市,区内发育与金矿化有关的存在破碎带、蚀变带、金矿脉等多条,通过研究该区的地质、物化探工作成果,建立本区地球化学、地球物理综合找矿模式,寻找深部矿、盲矿体或隐伏矿床,总结了该金矿床的成矿规律,取得了新的找矿方法和找矿标志,为今后找同类金矿床起指导意义。     

阜新排山楼地区金矿成矿条件分析与成矿预测

阜新排山楼金矿位于锦州后三角山-瓦子峪-阜新大巴韧性剪切带中段,为典型的同韧性剪切带变质热液型金矿床。金矿体产于蚀变糜棱岩内,透人性的铁白云石化一黄铁矿化是金赋存有利岩组,是直接的找矿标志,南北两个韧性剪切糜棱岩蚀变带内的物化探异常集中区为主要成矿靶区。     

新疆青河县察干郭勒金矿地质、地球化学特征及找矿潜力分析

新疆青河县察干郭勒金矿区处于哈龙-青河Au-Cu-Ni-Sn-云母-宝石Ⅳ级矿带,区域成矿地质条件较为有利。本文通过对察干郭勒金矿区地质、地球化学、矿化特征分析,总结该区成矿规律,其目的于察干郭勒一带进一步开展地质找矿工作,有望发现具有一定规模、工业意义的金(铜)矿床。     

南澜沧江火山岩带铜成矿地质背景及找矿前景

南澜沧江火山岩成矿带位于特提斯亚构造域(东段)之澜沧江晚古生代-三叠纪火山岩浆弧带。成矿带构造复杂,岩浆活动频繁,矿产资源丰富,矿种和类型多,具有良好的成矿地质条件。成矿带内铜矿类型有火山岩及火山沉积型铜矿床;与酸性侵入岩有关的热液脉状型、矽卡岩型和斑岩型铜矿床,以及复合成因的脉状铜矿床。介绍了区带内相继发现的一批以海相火山岩型(大平掌、三达山等)、热(卤)水沉积-改造型和斑岩-火山岩型(民乐铜矿)为主的大、中型铜矿床;展望了澜沧江火山岩成矿带具有寻找火山岩型铜矿的良好前景。     

云南龙脖河铜矿东矿带火山岩浆杂岩及其含矿性

变钠质的中基性火山杂岩-细碧角斑岩系是龙脖河铜矿区东矿带铜矿床的成矿母岩和容矿岩石,它固有的含矿性控制着区内铜矿床的空间展布和规模大小,为矿床的形成及定位提供了较为充分的物质保证。     

滇西沙河厂火山岩型铜矿找矿的新认识

介绍了已开发利用的滇西火山岩型铜矿;讨论了以保山市沙河厂铜矿为代表的寒武系海相火山岩型铜矿的特征及其找矿开发前景,此种火山岩型铜矿化分布面广、矿点多,勘查和研究程度较低,有待进一步开发研究。     

Initial epitaxial growth of (111) Au/(111) Cu and (111) Cu/(111) Au

The room temperature modes of growth of Au/(111) Cu and Cu/(111) Au are described. For the former growth mode initial deposits (2.4 Å) of gold on copper form smooth flat islands delineated by coincidence lattice misfit dislocations. For 6.0 Å of gold deposit, both thick and thin gold areas were observed with almost complete substrate coverage. For a 10 Å deposit, surface coverage was complete. Strain measurements and dislocation densities obtained on the (111) Au/(111) Cu films suggest the presence of two separate misfit dislocation networks at the interface. The coincidence lattice networks were large enough for transmission electron microscopy observation but contributed little to total overlayer strain. The (van der Merwe) natural lattice misfit dislocations were too closely spaced for direct observation but their presence was inferred because of the strain measurements. The initial epitaxy of Cu/(111) Au was similar to the Stranski-Krastanov model: the initial monolayer of copper (also delineated by coincidence misfit dislocations) grew smoothly on the gold; additional copper formed essentially stress-free “nuclei” on top of the initial copper layer.     

北衙金多金属矿床地质特征与成因

详细讨论了北衙矿区的地质特征,通过对勘探资料的深入研究和野外观察,初步确定,北衙矿区存在两期岩浆活动,早期的石英正长斑岩、正长斑岩等近南北向分布,晚期的黑云正长斑岩、煌斑岩脉等呈近东西向展布。矿化主要与近南北向岩体关系密切。北衙地区存在五种矿床类型,即矽卡岩型铁金矿床,其形成时代相对较早,分布于万硐山矿段、马头湾矿段等地;斑岩-隐爆角砾岩筒型金铜矿床,分布于北衙矿区的西矿带的万硐山-红泥塘(观音箐一带,形成时代相对较晚,并叠加于早期的矽卡岩型矿床之上;裂隙-溶洞型铁金矿床,主要分布于北衙矿区的东矿带的笔架山一带,属强氧化高品位金矿石;砂岩型铁金矿床,分布于本区的三叠系下统腊美组(T1l)砂岩中,呈似层状产出,成矿潜力巨大;红土型金矿床,主要分布于北衙盆地浅表部位的丽江组(E2l)和第四系堆积物中,易采易选,可供利用。北衙地区下一步勘探和研究的主要矿床类型应是深部具有潜力的斑岩(隐爆角砾岩筒型金铜矿床和三叠系下统碎屑岩中产出的砂岩型铁金矿床。     

Electron diffraction from periodic arrays of misfit dislocations formed during epitaxial growth

Changes in transmission electron diffraction patterns were examined during the epitaxial growth of copper and palladium on (111) gold substrates. Bicrystal patterns contain discrete reflections which can be explained by diffraction from uniformly strained deposit and substrate layers or by double diffraction between these two layers. Extra reflections are also observed, which vary markedly in intensity with increasing deposit thickness. It is shown that the extra reflections may be ascribed to periodic arrays of perfect edge misfit dislocations which are observed directly in both Cu/(111)Au and Pd/(111)Au films. The interpretation of these results is discussed and their significance for more general studies of epitaxial growth is briefly considered.     

Stimulated crystallization of polycrystalline ZnTe films

Ultrathin (about 1.5 nm) initial deposits of chromium, aluminium, copper, gold and silver on carbon film substrates were used for the subsequent deposition of ZnTe films. Transmission electron microscopy studies revealed that a silver deposit acts as the best stimulator for the grain growth ZnTe films. It is observed that an increase in the thickness of the initial deposit of silver helped in increasing substantially the grain size of ZnTe. It is also observed that the electrical properties of the ZnTe films are improved with an increase in the thickness of the initial deposit of silver (below 2.5 nm).     

果洛龙洼金矿床地质特征及成因探讨

果洛龙洼金矿床是近年在东昆仑造山带东段新发现的一处中型金矿床,通过对矿床的成矿地质条件、矿床地质特征,成矿机理的分析和研究,认为该矿床由早期形成的热水沉积建造提供主要成矿物质来源,在后期动力挤压、变形、变质作用下,成矿物质富集,形成含金石英脉型、构造蚀变岩型、具有典型的韧性剪切带型金矿床特点。     

Forming conditions for Au-Sb and Ag-Sb ore according to thermodynamic modeling data

Ore forming conditions for Au-Sb and Ag-Sb deposits have been estimated using thermodynamic modeling. PTX-parameters of ore-forming fluids obtained by fluid inclusion study in the minerals were used as original data for modeling. Analysis of composition of fluid inclusion solutions in the minerals of Au-Sb deposits together with mineralogical and geochemical data show that Au-Sb deposits were formed by two types of solutions: neutral–weak alkaline (C_Cl < 5 wt % NaCl-eq.), and acid high concentrated chloride solution (up to 30 wt% NaCl-eq.), containing FeCl₂ and CaCl₂ besides NaCl. In low concentrated chloride solution Sb is transported as sulfide and hydroxide complexes, and Au and Ag as bihydrosulfide species. In acid high chloride solution of late superimposed stage, which contains Cu, Ag, Pb, and Zn, predominating Au and Ag species are chloride complexes, and for Sb chloride and hydroxy-complexes. The main factors determining geochemical specialization of Ag-Sb ore are high chloride concentration and pH = 3.5–4, determining low Au-bearing capacity of the solution. Unsaturated in Ag low concentrated chloride solutions took part in Au-Sb deposit forming that determines their specific composition.     

某含砷微细粒金矿石浮选-氧化预处理-氰化提金试验研究

某金矿石中的金属矿物主要有黄铁矿、毒砂等,金矿物以自然金的形式存在且颗粒细小,属于微细粒金,大部分被金属硫化矿包裹。试验采用浮选法富集金矿物,获得了金品位63．8g／t,金回收率92．08％的金精矿,并对金精矿进行了常温常压碱性氧化预处理,处理后的精矿金氰化浸出率达到88．56％,该金矿石选冶总回收率达到81．55％。