Hydrotermální karbonáty a termometrie žilné mineralizace v terciérních vulkanitech u Uherského Brodu

Q4 Earth and Planetary Sciences

Geological Research in Moravia and Silesia Pub Date : 2020-12-21 DOI:10.5817/GVMS2020-13701

Kateřina Rusňáková, Marek Slobodník, Rastislav Milovský

{"title":"Hydrotermální karbonáty a termometrie žilné mineralizace v terciérních vulkanitech u Uherského Brodu","authors":"Kateřina Rusňáková, Marek Slobodník, Rastislav Milovský","doi":"10.5817/GVMS2020-13701","DOIUrl":null,"url":null,"abstract":"Hydrothermal mineralization in the Bučník quarry near Uherský Brod is the best locality for the study of this type of mineralization in the Outer Western Carpathians. The studied sulfide vein mineralization is genetically linked to Tertiary volcanics and represents a distance manifestation of the same vein type in the metallogenetic region of the Central Slovakian Volcanic Field.Study of vein structure, ore textures and structures, chemical composition of carbonates, isotope thermometry (isotopic composition of sulfur sphalerite/galena) and fluid inclusions, including microthermometry, shows that mineralization occurred under complex and variable conditions. Carbonates, defined as calcites with a proportion of Fe and Mn, dolomites and Fe- and Mn-dolomites, Mg-ankerites, show a highly variable chemical composition clearly documented as fine zones in CL-microscopy and BSE images.Fluid inclusions contain the aqueous system H2O-NaCl and H2O-NaCl + MgCl2 + FeCl2-3. Fluid salinity ranges from 2.7 to 14.7 mass% NaCl eq. whereas it is higher for sphalerite than for carbonates. The same trend is for homogenization temperatures in the range of 121-272 °C.Isotopic thermometry in combination with microthermometry shows a relatively wide probable range of temperature conditions. The younger carbonate mineralization may begin at temperatures of 125 °C and around 200 °C may overlap with a temperature of sulfide association that ranges from 170 °C to 335 °C. Isotopic thermometry also suggests possible higher temperatures up to 450 °C and above, but these highest temperatures are rather unlikely. The wide temperature range in which the mineralization originated is in accordance with the development of the hydrothermal system in a very dynamic environment in terms of tectonic, magmatic and hydrothermal. The studied hydrothermal system has a number of physico-chemical parameters similar to vein systems in the Central Slovakian volcanics region.","PeriodicalId":37485,"journal":{"name":"Geological Research in Moravia and Silesia","volume":"1 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geological Research in Moravia and Silesia","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5817/GVMS2020-13701","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}

引用次数: 0

Abstract

Hydrothermal mineralization in the Bučník quarry near Uherský Brod is the best locality for the study of this type of mineralization in the Outer Western Carpathians. The studied sulfide vein mineralization is genetically linked to Tertiary volcanics and represents a distance manifestation of the same vein type in the metallogenetic region of the Central Slovakian Volcanic Field.Study of vein structure, ore textures and structures, chemical composition of carbonates, isotope thermometry (isotopic composition of sulfur sphalerite/galena) and fluid inclusions, including microthermometry, shows that mineralization occurred under complex and variable conditions. Carbonates, defined as calcites with a proportion of Fe and Mn, dolomites and Fe- and Mn-dolomites, Mg-ankerites, show a highly variable chemical composition clearly documented as fine zones in CL-microscopy and BSE images.Fluid inclusions contain the aqueous system H2O-NaCl and H2O-NaCl + MgCl2 + FeCl2-3. Fluid salinity ranges from 2.7 to 14.7 mass% NaCl eq. whereas it is higher for sphalerite than for carbonates. The same trend is for homogenization temperatures in the range of 121-272 °C.Isotopic thermometry in combination with microthermometry shows a relatively wide probable range of temperature conditions. The younger carbonate mineralization may begin at temperatures of 125 °C and around 200 °C may overlap with a temperature of sulfide association that ranges from 170 °C to 335 °C. Isotopic thermometry also suggests possible higher temperatures up to 450 °C and above, but these highest temperatures are rather unlikely. The wide temperature range in which the mineralization originated is in accordance with the development of the hydrothermal system in a very dynamic environment in terms of tectonic, magmatic and hydrothermal. The studied hydrothermal system has a number of physico-chemical parameters similar to vein systems in the Central Slovakian volcanics region.

查看原文本刊更多论文

乌赫尔斯克基布罗德附近第三纪火山的热液碳酸盐岩和脉成矿温度测定

Uherský Brod附近Bučník采石场的热液成矿作用是研究喀尔巴阡山脉西部外缘此类成矿作用的最佳地点。研究的硫化物脉状矿化与第三系火山岩有遗传联系，是中斯洛伐克火山田成矿区内同一脉状矿化的一种距离表现。矿脉结构、矿石结构和构造、碳酸盐化学组成、同位素测温(含硫闪锌矿/方铅矿同位素组成)和流体包裹体(包括显微测温)研究表明，成矿发生在复杂多变的条件下。碳酸盐，定义为含有铁和锰比例的方解石，白云岩，铁和锰白云岩，镁铁铁白云岩，显示出高度变化的化学成分，在cl显微镜和BSE图像中清晰地记录为细区。流体包裹体包含H2O-NaCl和H2O-NaCl + MgCl2 + FeCl2-3水体系。流体盐度范围为2.7 ~ 14.7质量% NaCl当量，闪锌矿高于碳酸盐。均质温度在121-272℃范围内也有相同的趋势。同位素测温与显微测温相结合，可显示出相对较宽的温度条件可能范围。较年轻的碳酸盐矿化可能开始于125℃，200℃左右可能与硫化物结合温度重叠，温度范围从170℃到335℃。同位素测温也表明可能有450°C以上的高温，但这些最高温度是不太可能的。成矿形成的较宽温度范围与热液系统在构造、岩浆和热液等动力环境下的发育相适应。所研究的热液系统具有许多与斯洛伐克中部火山区脉系统相似的物理化学参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Geological Research in Moravia and Silesia Earth and Planetary Sciences-Geology

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The Geological research is peer-reviewed open access journal that publishes original research articles. The journal aims principally at quick publication of variety results from different fields of geological sciences and its applied sectors including interdisciplinary topics, laboratory experiments and modelling. Journal is focused on basic data and their simple and clear interpretation. Its aim is to facilitate the systematic development of the scientific body of knowledge in the field of geosciences with a span beyond the region of Central Europe. The form of articles/texts is as concise as possible. There is a section for publication of extended abstracts from conferences and meetings as well.