ORE CONTROL OF KHIZOVAARA STRUCTURE DEPOSITS

A. Nikiforov
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Abstract

Abstract Ore-controlling factors determine the patterns of formation and localization of mineralization within ore regions and deposits. The need for this study arises from the importance of integrated assessment of mineral resources and improvement of metasomatic formation techniques. This is especially important for  geological materials which are mined for their direct commercial value (industrial materials). This article is devoted to the study of the ore control of complex industrial minerals. The Khizovaara structure belongs to the Tikshozero greenstone belt. Within the structure, a multistage metamorphism and metasomatism processes are manifested. The totality of lithological, structural and petrologic ore control factors determines the existence within the structure of several deposits. These are deposits of industrial minerals, such as garnet, quartz, muscovite, kyanite, staurolite. In almost all cases, the ores are complex. The following objects were studied: Southern Lens (kyanite + quartz) deposit, Northern lens (kyanite + quartz) deposit, East Khizovaara (muscovite + quartz) deposit, Vysota-181 (garnet + staurolite + kyanite + muscovite + quartz) deposit, ore occurence Fuxit (decorative rocks). For the ores of each site, the processes of regional metamorphism of the amphibolite facies of kyanite-biotite and muscovite-chlorite-kyanite subfacies are important. Metamorphism, tectonic regime and geological connection with rocks  has been studied as a ore control factor, based on this, data on the quantitative distribution of industrial minerals of metamorphic genesis have been obtained. Acidic and alkaline metasomatites of each site are considered. On the basis of these data, metasomatic processes that lead to the formation of complex ores are revealed. The process of superposition of metasomatosis products of the late stage on the products of early stage metasomatosis was studied. This process leads to the formation of complex ores of three or four minerals. The result of the work is a general scheme of metamorphic and metasomatic ores control
khizovaara构造矿床的控矿作用
控矿因素决定了矿区和矿床的形成模式和矿化定位。矿产资源的综合评价和交代形成技术的改进具有重要意义,因此需要进行这项研究。这对于开采具有直接商业价值的地质材料(工业材料)尤其重要。本文对复杂工业矿物的控矿问题进行了研究。Khizovaara构造属于Tikshozero绿岩带。构造内部表现出多期变质和交代作用。岩性、构造和岩石控矿因素共同决定了若干矿床在构造内的存在性。这些是工业矿物的矿床,如石榴石、石英、白云母、蓝晶石、橄榄石。在几乎所有情况下,矿石都很复杂。研究对象有:南透镜体(蓝晶石+石英)矿床、北透镜体(蓝晶石+石英)矿床、东Khizovaara(白云石+石英)矿床、Vysota-181(石榴石+橄榄石+蓝晶石+白云石+石英)矿床、产状Fuxit(装饰岩)。对于各站点的矿石来说,蓝晶石—黑云母角闪岩相和白云母—绿泥石—蓝晶石亚相的区域变质作用是重要的。研究了变质作用、构造制度及与岩石的地质联系作为控矿因素,在此基础上获得了变质成因工业矿物的定量分布资料。考虑了每个地点的酸性和碱性交代岩。在这些资料的基础上,揭示了导致复杂矿石形成的交代过程。研究了晚期化脓产物与早期化脓产物的叠加过程。这个过程导致形成由三种或四种矿物组成的复杂矿石。研究结果为变质交代控矿提供了总体方案
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