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四川矿泉水在川西地区主要分布在盆周山区,且多集中在前龙门山,在川东地区则主要分布于川东褶皱束。矿泉水受构造断裂、活动断裂构造蚀变带及褶皱控制明显,或沿深大断裂深部循环,或沿褶皱层间裂隙、构造裂隙向倾伏方向富集、运移、承压出露。矿泉水类型较为单一,以锶、偏硅酸及其复合型为主,多为淡矿泉水,应注意寻找锌、硒、碘等稀有类型的矿泉水。 相似文献
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长坡区锡多金属矿床地质特征与成矿条件分析 总被引:1,自引:0,他引:1
长坡区锡多金属矿床位于大厂锡多金属矿田的西矿带,它是在地层、断裂构造和岩浆岩“三位一体”作用下形成的,地层是基础条件,断裂构造起了主导作用,岩浆提供热源以及可能提供了液源甚至矿质.因此,今后找矿中,更应关注断裂构造的研究。 相似文献
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长坡区锡多金属矿床位于大厂锡多金属矿田的西矿带,它是在地层、断裂构造和岩浆岩“三位一体“作用下形成的,地层是基础条件,断裂构造起了主导作用,岩浆提供热源以及可能提供了液源甚至矿质.因此,今后找矿中,更应关注断裂构造的研究. 相似文献
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湘南地区泥盆系碳酸盐岩分布广泛,文章在分析湖南省新田县新圩富锶饮用天然矿泉水形成的岩性、构造、水文地质条件、水文地球化学成因的基础上,通过探究影响锶富集的因素,揭示出泥盆系碳酸盐岩分布区富锶饮用天然矿泉水的成矿规律:泥盆系佘田桥组泥灰岩中锶的高丰度、相对封闭的地下水循环交替条件和弱的水动力条件是形成富锶饮用天然矿泉水的根本条件,循环深度和水温是锶富集的重要影响因素。湘南地区台盆相佘田桥组泥灰岩分布区是寻找富锶饮用天然矿泉水的首选靶区,特别是平缓的溶丘岗地地区的阻水断裂上盘以及靠近岩浆岩岩体和区域导热断裂附近是寻找富锶饮用天然矿泉水的有利地段。 相似文献
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安徽东至查册桥金矿断裂构造型式、控岩控矿和区域构造意义 总被引:3,自引:0,他引:3
查册桥金矿是近年在安徽省东至县发现的具一定规模的金矿床,矿床的形成与燕山期强烈的构造岩浆活动有密切的时空和成因联系。我们通过金矿勘查及专题研究,对区内的主要断裂构造进行了划分,对可观测的主要断裂构造基本特征、形成与演化、相互关系及控岩控矿作用进行较系统的研究,初步认为,区内主要断裂构造在印支期前构造基础上经印支期和燕山期强烈的构造活动形成,记录了江南过渡带北缘中生代构造转换的过程;区内断裂构造具重要的控岩控矿作用,其中高坦断裂控制了东西向构造岩浆岩带,兰程畈断层带控制了北东向构造岩浆岩带,区内的矿体多受O/S界面逆冲推(滑)覆断裂、花山洋湖断层带和北东向断层带控制,并主要赋存于其断层破碎带及次级断裂构造破碎带内。同时对区内高坦断裂表现形式、形成机制、与其他构造的关系及本区和区域控岩控矿作用进行了探讨,建立了区内主要断裂的形成模型。 相似文献
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兴国环形断裂对岩浆岩及金银矿的产出具有控制作用,其空间展布格局控制岩浆岩及金银矿带的展布方向,其派生的次级主干断裂控制金银矿田的产出,褶皱构造及其派生的走向断裂、层间构造破碎带联合控制金银矿床定位.果子坳、金田坑-黄金坑为找矿靶区. 相似文献
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炼锌废渣中重金属 Pb、Zn的矿物学特征 总被引:8,自引:1,他引:8
利用X射线衍射(XRD)和带能谱的电子显微镜(TEM/SEM)等方法研究土法炼锌固体废物的矿物组成,特别是重金属Pb和Zn的矿物学赋存特征。结果表明:固体废物是一种高度不均匀的复杂集合体。废渣主要是由石英、长石、碳酸盐矿物、铁质和铝质的非晶质玻璃以及少量风化次生矿物相组成。Pb在废渣中主要以金属Pb形式存在,或呈纳米金属Pb颗粒包裹或吸附于其它矿物表面及玻璃质集合体中。废渣中Zn的存在形式比Pb复杂得多,有硅锌矿、 锰硅锌矿、丝锌铝石等矿物存在形式,在其它矿物表面或玻璃质集体体中也能见到少量纳米级金属Zn。 相似文献
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The influence of Zn speciation on Zn transport by drainage from different soils to surface water is examined in a stream catchment
in an agricultural area. Drainage waters were collected from two types of soils, a mineral soil (MS) and a soil rich in organic
matter (OS) by means of artificial drainage pipes. The speciation of dissolved Zn in the stream and the drainage waters was
determined using ligand-exchange and voltammetry. About 50–95% of dissolved Zn is bound in strong complexes, and the free
Zn2+ ion concentration is in the range of 1–16% of dissolved Zn. A substantial part of Zn is present in weaker organic or inorganic
complexes. The simulated Zn speciation using the WHAM VI model is compared to the determined speciation. Free Zn2+ concentrations predicted by the WHAM VI model are generally higher than the analytically determined free Zn2+, but are mostly within the same order of magnitude. Effects of different soil organic matter content on Zn speciation and
transport are discussed. Zn speciation in the drainage at the OS site is influenced by the distribution of organic matter
between the solid and solution phase. The abundant organic Zn complexes in solution contribute to facilitate Zn transport
from soil into surface waters, through the drainage at the OS site. Drainage from the OS site contributes about twice as much
Zn input to the receiving water as the MS soil, as related to specific area. The mineral soil contains much lower organic
matter, and a part of Zn bound with inorganic phases can hardly be released by dissolved organic ligands, leading to much
higher Zn retention at the MS site. 相似文献
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峨眉山玄武岩与铅锌矿床成矿关系初探—以云南会泽铅锌矿床为例 总被引:31,自引:4,他引:31
本文以云南会泽铅锌矿为例,从成矿时代、成矿物来源、成矿流体来源和成矿热动力等方面初步讲座主峨眉山玄武岩与铅锌矿床成矿的关系。结果表明:矿床成矿时代可能与峨眉山玄武岩岩浆活动时代相近;峨眉山玄武岩在成矿过程中提供了部分成矿物质;伴随峨眉山玄武岩岩浆活动过程去气作用(包括地幔去气作用和岩浆去气作用)形成的流体参与了会泽铅锌矿成矿流体的形成;峨眉山玄武岩岩浆活动为成矿热动力的主要来源。 相似文献
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Hemimorphite, Zn4Si2O7(OH)2·H2O, one of the most common minerals in non-sulfide Zn deposits, together with smithsonite and hydrozincite, is one of the most abundant minerals in the “calamine” deposits in SW Sardinia. In spite of their importance for the development of ore genesis models, the stability properties of hemimorphite are poorly known. This paper presents solubility experiments on two different types of hemimorphite: a “geological” hemimorphite from a supergene non-sulfide Zn deposit, of supposed abiotic origin, and a hemimorphite precipitated by bacterial activity. Both specimens were characterized, before and after the experiment, by Synchrotron Radiation X-ray powder diffraction, Scanning Electron Microscopy, and X-ray Absorption Spectroscopy. The calculated solubility product constants (logKs) are similar for both “geological” and biogenic hemimorphite (30.3 ± 0.4 and 30.5 ± 0.1, respectively). During the solubility experiment, biological hemimorphite undergoes an amorphous to crystalline phase transition, and the distinctive features (mineralized bacterial sheaths and organic filaments), that allowed us to demonstrate its biological origin, are no longer recognizable by Scanning Electron Microscopy.The results of this study may be useful for developing ore genesis models, including evolution in a supergene environment, and in general for performing geochemical speciation and equilibrium calculations. Moreover, our findings open the way for a new interpretation of hemimorphite-forming processes, and suggest the possibility that bacteria may have played a role in the formation of this mineral in ore deposits. 相似文献
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Zn and Pb smelters are the major contributors to Zn and Pb emissions among all anthropogenic sources, thus, it is essential to understand Zn isotopic variations within the context of metallurgical industries, as well as its fractionation in different environments impacted by smelting activities. This mini review outlines the current state of knowledge on Zn isotopic fractionation during the high-temperature roasting process in Zn and Pb refineries; δ66Zn values variations in air emissions, slags and effluents from the smelters in comparison to the geogenic Zn isotopic signature of ores formation and weathering. In order to assess the environmental impact of these smelters, the available and measured δ66Zn values are compiled for smelter impacted natural water bodies (groundwater, stream and river water), sediments (lake and reservoir) and soils (peat bog soil, inland soil). Finally, the discussion is extended to the fractionation induced during numerous physicochemical reactions and transformations, i.e. adsorption, precipitation as well as both inorganic and organic surface complexation. 相似文献
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多接收器等离子体质谱法Zn同位素比值的高精度测定 总被引:12,自引:3,他引:9
详细报道了Zn同位素比值的多接收器等离子体质谱(MC-ICP-MS)高精度测定方法,包括:MC-ICP-MS Zn同位素测量过程中的质量歧视校正、同质异位素干扰评估、基质效应调查和同位素测量的长期重现性检验.研究表明,在测定条件下,运用标样一样品交叉法能有效地进行仪器质量歧视校正.同质异位素干扰的评估通过3种方式进行,即:在高分辨状态下同质异位数干扰信号的直接测定,低分辨状态下Zn同位素原始数据间相关关系的检验和低分辨下浓度梯度效应研究.结果表明,在低分辨模式下,尽管66Zn、67Zn、68Zn的同质异位素干扰信号很小,但的确存在,要获得准确同位素比值,必须使标样和样品的浓度在合适的范围内匹配.在基质效应方面,主要考察Fe对Zn同位素比值测定的影响.结果表明,当溶液中Fe/Zn(质量比)不大于0.2时,Fe对Zn同位素比值测定无影响.重复性测定中,δ66ZnGSB-Romil=6.96‰±0.11‰(2sd),δ67ZnGSB-Romil=10.4‰±0.20‰(2sd),δ68ZnGSB-Romil=13.8‰±0.22‰(2sd),达到国际同类实验室先进水准.运用所建立的方法,对地质岩石成分分析国家标准物质GBW 07270(闪锌矿)进行了Zn同位素平均成分测定为:δ66Zn=6.71‰±0.03‰(20),δ67Zn=10.08‰±0.05‰(20),δ68Zn=13.37‰±0.07‰(2σ). 相似文献
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西藏勒青拉铅锌矿床稀土元素地球化学特征 总被引:5,自引:0,他引:5
文章通过对西藏勒青拉铅锌矿床稀土元素的研究,判定矿石与地层(灰岩)有着相同的稀土元素特征,同时矿石与岩浆岩也有着密切的关联.夕卡岩全岩的稀土元素分布模式表现出承袭了围岩的分布模式,与长江中下游地区的夕卡岩矿床相比表现出截然不同的特征,造成这一现象的主要原因可能是由于岩体距碳酸盐岩地层(围岩)较远,热液需经过构造等通道的远距离运移后才能流经围岩并与其发生接触交代作用,而在接触交代作用过程中,热液又萃取了大量地层中的成矿物质所造成.稀土元素相关的特征值变化表明在成矿过程中,成矿温度逐渐降低,成矿环境从相对还原条件向相对氧化条件改变. 相似文献