Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia)
We present a physicochemical model for the formation of magnetite-chlorite-carbonate rocks with copper gold in the Karabash ultramafic massif in the Southern Urals, Russia. The model was constructed based on the formation geotectonics of the Karabash massif, features of spatial distribution of metas...
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doaj-a4d26087ae3548708a69653be3edeb2d2020-11-25T01:13:42ZengMDPI AGMinerals2075-163X2018-07-018730610.3390/min8070306min8070306Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia)Valery Murzin0Konstantin Chudnenko1Galina Palyanova2Aleksandr Kissin3Dmitry Varlamov4A.N. Zavaritsky Institute of Geology and Geochemistry, Ural Branch of Russian Academy of Sciences, Vonsovskogo str., 15, Ekaterinburg 620016, RussiaA.P. Vinogradov Institute of Geochemistry, Siberian Branch of Russian Academy of Sciences, Favorskogo str., 1a, Irkutsk 664033, RussiaV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Akademika Koptyuga pr., 3, Novosibirsk 630090, RussiaA.N. Zavaritsky Institute of Geology and Geochemistry, Ural Branch of Russian Academy of Sciences, Vonsovskogo str., 15, Ekaterinburg 620016, RussiaInstitute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, Moscow Region 142432, RussiaWe present a physicochemical model for the formation of magnetite-chlorite-carbonate rocks with copper gold in the Karabash ultramafic massif in the Southern Urals, Russia. The model was constructed based on the formation geotectonics of the Karabash massif, features of spatial distribution of metasomatically altered rocks in their central part, geochemical characteristics and mineral composition of altered ultramafic rocks, data on the pressure and temperature conditions of formation, and composition of the ore-forming fluids. Magnetite-chlorite-carbonate rocks were formed by the hydrothermal filling of the free space, whereas chloritolites were formed by the metasomatism of the serpentinites. As the source of the petrogenic and ore components, we considered rocks (serpentinites, gabbro, and limestones), deep magmatogenic fluids, probably mixed with metamorphogenic fluids released during dehydration and deserpentinization of rocks in the lower crust, and meteoric waters. The model supports the involvement of sodium chloride-carbon dioxide fluids extracting ore components (Au, Ag, and Cu) from deep-seated rocks and characterized by the ratio of ore elements corresponding to Clarke values in ultramafic rocks. The model calculations show that copper gold can also be deposited during serpentinization of deep-seated olivine-rich rocks and ore fluids raised by the tectonic flow to a higher hypsometric level. The results of our research allow predicting copper gold-rich ore occurrences in ultramafic massifs.http://www.mdpi.com/2075-163X/8/7/306Karabash ultramafic massifmagnetite-chlorite-carbonate rockschloritolitesAu-Cu mineralizationcopper goldthermodynamic modeling |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Valery Murzin Konstantin Chudnenko Galina Palyanova Aleksandr Kissin Dmitry Varlamov |
spellingShingle |
Valery Murzin Konstantin Chudnenko Galina Palyanova Aleksandr Kissin Dmitry Varlamov Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia) Minerals Karabash ultramafic massif magnetite-chlorite-carbonate rocks chloritolites Au-Cu mineralization copper gold thermodynamic modeling |
author_facet |
Valery Murzin Konstantin Chudnenko Galina Palyanova Aleksandr Kissin Dmitry Varlamov |
author_sort |
Valery Murzin |
title |
Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia) |
title_short |
Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia) |
title_full |
Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia) |
title_fullStr |
Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia) |
title_full_unstemmed |
Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia) |
title_sort |
physicochemical model of formation of gold-bearing magnetite-chlorite-carbonate rocks at the karabash ultramafic massif (southern urals, russia) |
publisher |
MDPI AG |
series |
Minerals |
issn |
2075-163X |
publishDate |
2018-07-01 |
description |
We present a physicochemical model for the formation of magnetite-chlorite-carbonate rocks with copper gold in the Karabash ultramafic massif in the Southern Urals, Russia. The model was constructed based on the formation geotectonics of the Karabash massif, features of spatial distribution of metasomatically altered rocks in their central part, geochemical characteristics and mineral composition of altered ultramafic rocks, data on the pressure and temperature conditions of formation, and composition of the ore-forming fluids. Magnetite-chlorite-carbonate rocks were formed by the hydrothermal filling of the free space, whereas chloritolites were formed by the metasomatism of the serpentinites. As the source of the petrogenic and ore components, we considered rocks (serpentinites, gabbro, and limestones), deep magmatogenic fluids, probably mixed with metamorphogenic fluids released during dehydration and deserpentinization of rocks in the lower crust, and meteoric waters. The model supports the involvement of sodium chloride-carbon dioxide fluids extracting ore components (Au, Ag, and Cu) from deep-seated rocks and characterized by the ratio of ore elements corresponding to Clarke values in ultramafic rocks. The model calculations show that copper gold can also be deposited during serpentinization of deep-seated olivine-rich rocks and ore fluids raised by the tectonic flow to a higher hypsometric level. The results of our research allow predicting copper gold-rich ore occurrences in ultramafic massifs. |
topic |
Karabash ultramafic massif magnetite-chlorite-carbonate rocks chloritolites Au-Cu mineralization copper gold thermodynamic modeling |
url |
http://www.mdpi.com/2075-163X/8/7/306 |
work_keys_str_mv |
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