肃北县二段井地区铅多金属矿土壤地球化学特征及找矿前景

通过对北山南带二段井铅多金属矿开展1∶1万土壤地球化学测量,结合成矿地质条件进行了土壤地球化学找矿研究。得出以下几点认识:1)矿区土壤中Au、Pb富集系数和变异系数大,成矿潜力好;2)相关分析、因子分析表明Ag、Zn,As、W、Mo,分别代表了中低温成矿作用,可作为Au、Pb的间接找矿标志;3)圈定了7个综合异常,在HT4号异常区中圈定1条金铅矿体,认为该异常区找矿前景很好,是寻找热液型矿床的有利地区,为下一步找矿工作重点靶区。     

安徽宁国石口金矿找矿前景——来自Ⅲ矿化带地球化学原生晕的证据

石口金矿位于钦杭成矿带,是新近发现的具有一定找矿潜力的金矿。为进一步扩大找矿成果,该文通过对石口金矿Ⅲ-②矿体原生晕特征进行综合分析,并结合土壤地球化学测量成果,对找矿前景进行探讨。研究表明:主成矿元素Au与元素As、Ag、Sb密切相关,挥发份F可作为特征指示元素;Ⅲ-②矿体有可能为多期叠加形成,尾晕元素出现在原生晕分带序列前端,指示深部具有一定的成矿潜力。这些研究成果暗示Ⅲ矿化带沿走向及Ⅲ-②号矿体深部具有进一步找矿空间。     

我国黑色岩系中硒矿资源及其前景分析

黑色岩系广泛分布于我国南方各省区。黑色岩系赋存有石煤层、镍相矿、磷块岩、钒矿、银钒矿和金矿，并伴生有硒、铜、锌、铀、稀土、铂族元素等，硒还可形成有工业意义的独立硒矿床。自然界中已发现９１种硒矿物和含硒矿物。目前仅发现三个不同地质时期的黑色岩系的硒矿产资源。     

与碱性花岗岩有关的稀有稀土矿床

概述了含矿碱性花岗岩产出的地质背景，含矿岩体的主要特征。根据岩石中暗色矿物与主要成矿元素的关系，将碱性花岗岩矿床划分为３种矿化类型：含Ｎｂ（Ｓｎ）黑云母花岗岩；含Ｎｂ（Ｓｎ）、ＨＲＥＥ钠铁闪石－钠闪石花岗岩；含ＬＲＥＥ霓石花岗岩，并指出，碱性花岗岩矿床在我国北部边区和攀西裂谷带具有良好的成矿前景。     

Exhalites Associated with Pb-Zn Mineralization in Devonian System and Their Prospecting Implications,Qinling,China

The exhalation origin of the ankerite-siliceous rocks associated with Pb-Zn mineralizations in the Devonian system of Qinling is discussed in the light of geologic setting,sedimentary-tectonic environment,lithological and chemical characteristics.On this basis,criteria for distinguishing them and their potential role as an indicator in prospecting are described.Ankerite-siliceous rocks are developed in the strata-bound Pb-Zn polymetallic belt in the Devonian system of Qinling.They are microcrystalline,dark grey and compact in appearance and are commonly carbonaceous,As a persistent ore-bearing horizon in the region,their genetic relation to the Pb-Zn deposits in generally accepted.However,a consensus has yet to be reached among geologists concerning their origein as a product of hydrothermal metasomtism at the late stage of sedimentation or as exhalite resulting from submarine exhalation.Accumulating evidence from direct observations on modern submarine hydrothermal systems strongly indicates that seafloor exhalation is a much more common geologic process than previously thought nd its metallogenic implications have long been overlooked.Characteristics of the ankerite-siliceous rocks as a product of exhalation and their significance as a guide in prospecting are described on the basis or geological setting,lithology,lithochemistry,REE,and isotopic and trace element features.     

九瑞地区方解石矿地质特征及应用前景

江西九瑞地区方解石矿分布较广，主要产于二叠－三叠系碳酸盐地层中，主要类型有次生淋滤型和大理岩型两大类。本文以瑞昌市３号方解石矿区的４号方解石矿区为例，阐述矿床及其矿石特征方面的差异，评述了其开发应用前景。     

豫西寨凹地区地质物化探综合找矿效果

豫西寨凹地区1/5万水系沉积物测量成果显示该区元素组合以银、铅、铜为主,以寨凹为中心出现W,Sn,Bi,Mo,Cu等高温元素组合;1/万沟系次生晕测量表现为Cu,Ag,Bi,Sb中高温元素组合;极化率异常则显示为宽幅面状,具高阻高极化异常特征;经过对地物化资料的综合分析研究,认为该区具备良好的斑岩型铜矿成矿地质条件,其Z4脉可能为深部斑岩型铜矿的脉状延伸,进一步找矿前景乐观.     

青海小赛什腾铜矿地质特征及找矿前景

小赛什腾铜矿受控于加里东期花岗闪长斑岩及细粒闪长岩体,在岩体内部的构造裂隙系统中发育钾长石化、硅化、绢云母化、绿泥石化、碳酸盐化等围岩蚀变,矿体主要赋存在钾长石硅化带内;共有3个铜矿体,矿化以铜为主,伴有金钼矿化;矿石类型主要为细脉状、细脉浸染状及浸染状.矿床具有斑岩型矿床的特征,预测可达中型规模.