Filizchay黄铁矿多金属矿床(大高加索南坡)——作为SEDEX型黄铁矿矿床的典型代表

IF 0.4 Q4 GEOSCIENCES, MULTIDISCIPLINARY
N. Imamverdiyev, Nigar A. Sattar-zade
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引用次数: 0

摘要

这篇文章专门讨论了大高加索南坡最大的矿床之一-菲利兹查伊黄铁矿多金属矿床。发现Filizchay矿床的黄铁矿多金属矿床的主要形态特点是它是一个单一的、致密的片状体,主要由硫铁矿、闪锌矿、方铅矿和少量黄铜矿、磁黄铁矿等硫化物矿石的集合体组成(占90-95%)。碳酸盐矿物在矿床组成中占次要地位,石英、绢云母和绿泥石占次要地位。矿床黄铁矿多金属矿石的主要矿物结构品种有:层状层状黄铁矿多金属、块状硫黄铁矿、块状黄铁矿多金属、斑状浸染黄铁矿多金属和脉状浸染黄铁矿多金属。脉状浸染的矿石与下盘的矿床相邻,被认为是独立的体。在矿床中发现了两种工业技术类型的矿石,即氧化型和黄铁矿多金属型。后者又分为两个等级:混合矿石和原生矿石。这三种矿石的氧化铅形态含量不同。将氧化铅形态含量在60%以上的矿石归类为氧化矿石,20% ~ 60%的矿石归类为混合矿石,20%以下的矿石归类为原生矿石。Filizchay矿床由薄层状块状硫化物与页岩、粉砂岩或砂岩互层(“矿石复理岩”)组成,它们完全或主要是由于海底的喷发作用而形成的,与火山岩中的块状硫化物矿床不同。在此基础上,并根据矿床地质构造,认为该矿床有价值的Zn + Pb组分储量为SEDEX型,是铅、锌、银最重要的来源。该矿床自沉积期至铜磁黄铁矿阶段形成,经历了较长时间的发育。成矿年龄下限由上普林恩巴氏统热液沉积矿石的存在决定。年龄上限由热液蚀变岩石中的鹅卵石及其在上侏罗统下部沉积物下的砾岩中的硫化物矿石确定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Filizchay pyrite-polymetallic deposit (the southern slope of the Greater Caucasus) – as a typical representative of the SEDEX type pyrite deposits
The article has been devoted to one of the largest deposits of the southern slope of the Greater Caucasus – the Filizchay pyrite-polymetallic deposit. It has been found that the main morphology peculiarity of the pyrite-polymetallic deposit of the Filizchay deposit is that it is a single, compact sheet-like body composed mainly (at 90-95%) by the aggregates of the sulfide ores which are based on pyrite, sphalerite, galena and to a far lesser extent chalcopyrite and pyrrhotite. The carbonate minerals played a subordinate role in the deposit composition and quartz, sericite and chlorite – even less. The pyrite –polymetalic ores of the deposit are characterized by the following main mineralogical-textural varieties of ores: layered-bedded pyrite-polymetallic, massive sulfur-pyrite, massive pyrite-polymetallic, spotted-disseminated pyrite-polymetallic and vein-disseminated pyrite-polymetallic. The vein-disseminated ores are adjacent to the deposit on the footwall and are considered as independent bodies. Two industrial-techno- logical types of ores, oxidized and pyrite-polymetallic, have been distinguished at the deposit. The latter is in turn divided into two grades: mixed and primary ores. These three varieties of ores differ in the content of the oxidized lead forms. The ores with a content of the oxidized lead speciation above 60% have been classed as oxidized ores, those from 20% to 60% as mixed and those below 20% as primary. The Filizchay deposit consists of thin-bedded massive sulfides with shales, siltstones or sandstones interbeds («ore flysch») which have been formed exclusively or mainly as a result of the exhalative processes on the seabed and differ from massive sulfide deposits in volcanic rocks. On the basis of this and also according to the geological structure, the reserves of the valuable Zn + Pb components of the deposit belong to the SEDEX type that is the most important source of lead, zinc and silver. The deposit had been developing for a long time starting from the period of sedimentation and up to the ore’s formation of the copper-pyrrhotite stage. The lower age limit of the mineralization is determined by the presence of the hydrothermal-sedimentary ores of the Upper Pliensbachian. The upper age limit is established by the presence of the pebbles of the hydrothermally altered rocks and by their sulfide ores in the conglomerates underlying the deposits of the lower parts of the Upper Jurassic.
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来源期刊
Journal of Geology Geography and Geoecology
Journal of Geology Geography and Geoecology GEOSCIENCES, MULTIDISCIPLINARY-
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