多金属矿地质矿产特征及找矿方向分析

随着全球矿产资源日益匮乏和对多种金属需求增加,多金属矿床勘探和开发成为矿产资源开发主要方向之一.多金属矿是指同时含有多种有用金属矿石的矿床,其开发具有重要的经济价值和战略意义,多金属矿的地质矿产特征和找矿方向对于科学进行资源勘探和开发具有重要的指导作用.本文将从多金属矿地质及矿产特征及找矿方向三个方面进行详细分析.

内蒙古天顺成银多金属矿地质特征

通过收集内蒙古天顺成银多金属矿区的区域地质资料,结合实际地质勘查工作成果,对天顺成银多金属矿区地层、矿区构造格局、岩浆岩分布等地质特征进行了概述;对矿区矿床成因、找矿标志进行了规律性总结,并对矿区找矿远景作出了评价。

铅锌铜多金属矿地质地球化学特征与找矿潜力分析

铅锌铜多金属矿作为矿区勘查的重点,已成为近年来矿产资源研究的关键方向,以此开展了铅锌铜多金属矿地质地球化学特征与找矿潜力的分析。绘制地质地球化学分带示意图,按照矿产资源在整体矿区的占比,分析铅锌铜多金属矿地层含量丰度,结合矿区勘查数据集合中的特征点,划分铅锌铜元素地球化学分带,提取地球化学异常分布特征,根据同位金属元素化学特性分析,判定区域矿产资源赋存情况,为找矿提供方向。

绿色勘查技术在多金属矿地质勘查中的应用

随着技术的优化和升级以及人们环保意识的不断提升,在多金属矿地质勘查的过程中,绿色勘查技术也得到了重视。结合目前多金属矿地质勘查的现状来说,若是采取传统的地质勘查方式,在进行具体勘查的过程中,会对周边的环境造成严重的破坏,传统的勘查方式仅关注多金属矿勘查效益而忽视环保。为此,本文针对当前多金属矿勘查过程中绿色勘查技术的应用进行了观点的阐释和分析,希望为推动当前绿色多金属矿勘查过程中的环保工作提供切实的支撑和帮助。

安徽省旌德县庙首地区金多金属矿地质成矿基本状况

描述旌德县庙首区域地质背景,区内围岩、岩体、岩脉、构造、矿体、矿石、围岩蚀变的基本状况。

内蒙古鄂伦春旗某钼多金属矿矿床地质特征及找矿前景分析

内蒙古鄂伦春旗某钼多金属矿位于内蒙古自治区东部,区域大地构造位置为华北板块与西伯利亚板块结合部附近,次级构造位置为西伯利亚板块南侧岛弧火山岩带。在近年找矿工作所发现,利用少量山地工程和一个验证钻孔,发现数层钼、铜矿体。矿体赋存于二叠纪花岗岩中,受岩体接触带的控制,已初步发现矿体16条,厚度最小1.2,最大17.45,品位为0.03%~0.618%。据现有物化探资料分析含矿花岗岩存在两期活动,后期上侵形成的小岩枝及与早期岩体的结合部位是良好的成矿场所,具备斑岩型成矿条件。找矿潜力巨大。

Re-Os isotopic data for molybdenum from Hejiangkou tungsten and tin polymetallic deposit in Chenzhou and its geological significance

Hejiangkou W-Sn-polymetallic deposit is a newly found deposit in Xitian ore field,one of the important and large scale W-Sn-polymetallic ore fields in the middle segment of Nanling metallogenic zone.Re-Os isotope dating was used on three molybdenite samples from Hejiangkou deposit to determine the ore forming period.The result is(224.9±2.6)Ma-(225±3.1)Ma and isochron age is(225.5±3.6)Ma.The field geological observations,geochronological data and optical petrography indicated that Hejiangkou deposit underwent multi-period of superimposed mineralization.It can be differentiated into three periods composed of six mineralization stages.The first period is the initial period for hydrothermal metasomatism and metal element enrichment during Indosinian Epoch.Further enrichment,strong brittle fracturing and hydrothermal metasomatism,remobilization and superimposition happened in the second period,during early Yanshanian.It is the major mineralization period of Hejiangkou deposit and can be subdivided into four mineralization stages,namely the skarn stage,oxide stage,high-temperature sulfide stage and low-temperature sulfide stage.And the third period is the mineralization period of a porphyry-skarn system related to the emplacement of the granite porphyry dyke.As minerogenic epoch of Hejiangkou deposit is similar with Hehuaping deposit,they show the possibility of Indosinian mineralization event in Nanling metallogenic zone.It can be an important perspective in any future mineral exploration in the same metallogenic zone.

Geological characteristics and mineralization setting of the Zhuxi tungsten(copper) polymetallic deposit in the Eastern Jiangnan Orogen

The Zhuxi ore deposit is a super-large scheelite(copper) polymetallic deposit discovered in recent years. It grew above copper/tungsten-rich Neoproterozoic argilloarenaceous basement rocks and was formed in the contact zone between Yanshanian granites and Carboniferous-Permian limestone. Granites related to this mineralization mainly include equigranular, middle- to coarse-grained granites and granitic porphyries. There are two mineralization types: skarn scheelite(copper) and granite scheelite mineralization. The former is large scale and has a high content of scheelite, whereas the latter is small scale and has a low content of scheelite. In the Taqian-Fuchun Basin, its NW boundary is a thrust fault, and the SE boundary is an angular unconformity with Proterozoic basement. In Carboniferous-Permian rock assemblages, the tungsten and copper contents in the limestone are both very high. The contents of major elements in granitoids do not differ largely between the periphery and the inside of the Zhuxi ore deposit. In both areas, the values of the aluminum saturation index are A/CNK>1.1, and the rocks are classified as potassium-rich strongly peraluminous granites. In terms of trace elements, compared to granites on the periphery of the Zhuxi ore deposit, the granites inside the Zhuxi ore deposit have smaller d Eu values, exhibit a significantly more negative Eu anomaly, are richer in Rb, U, Ta, Pb and Hf, and are more depleted in Ba, Ce, Sr, La and Ti, which indicates that they are highly differentiated S-type granites with a high degree of evolution. Under the influence of fluids, mineralization of sulfides is evident within massive rock formations inside the Zhuxi ore deposit, and the mean SO_3 content is 0.2%. Compared to peripheral rocks, the d Eu and total rare earth element(REE) content of granites inside the Zhuxi ore deposit are both lower, indicating a certain evolutionary inheritance relationship between the granites on the periphery and the granites inside the Zhuxi ore deposit. For peripheral and ore district plutons, U-Pb zircon dating shows an age range of 152–148 Ma. In situ Lu-Hf isotope analysis of zircon in the granites reveals that the calculated e_(Hf)(t) values are all negative, and the majority range from -6 to -9. The T_(DM2) values are concentrated in the range of 1.50–1.88 Ga(peak at 1.75 Ga), suggesting that the granitic magmas are derived from partial melting of ancient crust. This paper also discusses the metallogenic conditions and ore-controlling conditions of the ore district from the perspectives of mineral contents, hydrothermal alteration, and ore-controlling structures in the strata and the ore-bearing rocks. It is proposed that the Zhuxi ore deposit went through a multistage evolution, including oblique intrusion of granitic magmas, skarn mineralization, cooling and alteration, and precipitation of metal sulfides. The mineralization pattern can be summarized as "copper in the east and tungsten in the west, copper at shallow-middle depths and tungsten at deep depths, tungsten in the early stage and copper in the late stage".