Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit
Multiphase fine aggregates of galena, pyrrhotite, freibergite, pyrargyrite, diaphorite, fizelyite, uchucchacuaite, ullmanite, and some other minerals are found in the ores of the Oleninskoe gold deposit in the Kolmozero-Voronya greenstone belt (Kola Peninsula, Russia). The aggregates are considered to be the product of crystallization of sulfide melt formed of the minerals of low-melting-point chalcophile elements (Zn, Ag, Cd, Tl, Pb, As, Sb, Bi, Se, Te, etc.) during heating to the temperature above 500 °C. This origin of the aggregates is affirmed by: 1) multiphase composition (up to 6 minerals) of the aggregates; 2) absence of signs of replacing early minerals by the late ones; 3) essential presence in the aggregates of the minerals of chalcophile elements Ag, Pb, Sb, i. e. elements with a low melting point of their compounds; 4) roundish droplet form of inclusions of minor minerals in the main sulfide, and 5) aggregates' position at the boundary sulfide – quartz or in fractures in vein minerals. Partial melting and crystallization of sulfide melts took place during Paleoproterozoic metamorphic event, when the Neoarchean sulfide-bearing rocks were mid-amphibolite metamorphosed under the temperature > 500 °C. Signs of the Paleoproterozoic metamorphism are found in the ores of the neighboring Cu-Mo porphyry Pellapahk deposit as well.
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Format: | Journal Contribution biblioteca |
Language: | Russian |
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2020
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Subjects: | Sulfide melt, Galena, Freibergite, Cульфидный расплав, Галенит, Фрейбергит, ASFA_2015::G::Geology, ASFA_2015::G::Geophysics, ASFA_2015::M::Metamorphism, ASFA_2015::S::Silver, |
Online Access: | http://hdl.handle.net/1834/41527 |
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dig-aquadocs-1834-415272021-10-21T03:32:12Z Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit Структуры кристаллизации сульфидных расплавов как признак метаморфизма руд Оленинского месторождения золота Kalinin, A. A. Savchenko, Ye. E. Sulfide melt Galena Freibergite Cульфидный расплав Галенит Фрейбергит ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::M::Metamorphism ASFA_2015::S::Silver Multiphase fine aggregates of galena, pyrrhotite, freibergite, pyrargyrite, diaphorite, fizelyite, uchucchacuaite, ullmanite, and some other minerals are found in the ores of the Oleninskoe gold deposit in the Kolmozero-Voronya greenstone belt (Kola Peninsula, Russia). The aggregates are considered to be the product of crystallization of sulfide melt formed of the minerals of low-melting-point chalcophile elements (Zn, Ag, Cd, Tl, Pb, As, Sb, Bi, Se, Te, etc.) during heating to the temperature above 500 °C. This origin of the aggregates is affirmed by: 1) multiphase composition (up to 6 minerals) of the aggregates; 2) absence of signs of replacing early minerals by the late ones; 3) essential presence in the aggregates of the minerals of chalcophile elements Ag, Pb, Sb, i. e. elements with a low melting point of their compounds; 4) roundish droplet form of inclusions of minor minerals in the main sulfide, and 5) aggregates' position at the boundary sulfide – quartz or in fractures in vein minerals. Partial melting and crystallization of sulfide melts took place during Paleoproterozoic metamorphic event, when the Neoarchean sulfide-bearing rocks were mid-amphibolite metamorphosed under the temperature > 500 °C. Signs of the Paleoproterozoic metamorphism are found in the ores of the neighboring Cu-Mo porphyry Pellapahk deposit as well. В рудах месторождения золота Оленинское (северо-западная часть зеленокаменного пояса Колмозеро-Воронья, Кольский п-ов, Россия) в краевой части зерен галенита, пирротина, фрейбергита отмечены тонкие полиминеральные срастания, в состав которых кроме перечисленных сульфидов входят пираргирит, диафорит, физелиит, учукчакуаит, ульманит и некоторые другие минералы. Эти срастания рассматриваются нами как результат кристаллизации сульфидного расплава, получившегося при нагреве до температуры свыше 500 °C входящих в состав руды минералов халькофильных элементов, имеющих низкую температуру плавления (Zn, Ag, Cd, Tl, Pb, As, Sb, Bi, Se, Te и некоторые другие). О таком происхождении изученных срастаний свидетельствуют: 1) сложный полиминеральный (до 6 минеральных видов) состав срастаний; 2) отсутствие признаков замещения ранних минералов поздними; 3) обязательное участие в составе срастаний минералов свинца, серебра, сурьмы, т. е. элементов с низкой температурой плавления их соединений; 4) каплевидные либо неправильной формы округлые выделения сульфидов и сульфосолей в матрице основного сульфида-хозяина; 5) выделение таких срастаний в виде обособлений на границе сульфидов и жильных минералов либо в виде микропрожилков в кварце. Частичное плавление рудных минералов с образованием сульфидного расплава и последующая его кристаллизация проходили на палеопротерозойском этапе при метаморфизме сформировавшихся ранее рудоносных пород в условиях средней части амфиболитовой фации при температуре выше 500 °C. Признаки наложенного метаморфизма руды выявлены также и на расположенном в той же части пояса Колмозеро-Воронья медно-молибденовом порфировом месторождении Пеллапахк. Published Refereed 2021-10-20T07:50:47Z 2021-10-20T07:50:47Z 2020 Journal Contribution http://hdl.handle.net/1834/41527 ru http://vestnik.mstu.edu.ru/show-eng.shtml?art=2049 http://vestnik.mstu.edu.ru/show.shtml?art=2049 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ pp.29-37 Kolmozero-Voronya greenstone belt Oleninskoe deposit Kola Peninsula Зеленокаменный пояс Колмозеро-Воронья Оленинское месторождение Кольский полуостров |
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Sulfide melt Galena Freibergite Cульфидный расплав Галенит Фрейбергит ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::M::Metamorphism ASFA_2015::S::Silver Sulfide melt Galena Freibergite Cульфидный расплав Галенит Фрейбергит ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::M::Metamorphism ASFA_2015::S::Silver |
spellingShingle |
Sulfide melt Galena Freibergite Cульфидный расплав Галенит Фрейбергит ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::M::Metamorphism ASFA_2015::S::Silver Sulfide melt Galena Freibergite Cульфидный расплав Галенит Фрейбергит ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::M::Metamorphism ASFA_2015::S::Silver Kalinin, A. A. Savchenko, Ye. E. Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit |
description |
Multiphase fine aggregates of galena, pyrrhotite, freibergite, pyrargyrite, diaphorite, fizelyite, uchucchacuaite, ullmanite, and some other minerals are found in the ores of the Oleninskoe gold deposit in the Kolmozero-Voronya greenstone belt (Kola Peninsula, Russia). The aggregates are considered to be the product of crystallization of sulfide melt formed of the minerals of low-melting-point chalcophile elements (Zn, Ag, Cd, Tl, Pb, As, Sb, Bi, Se, Te, etc.) during heating to the temperature above 500 °C. This origin of the aggregates is affirmed by: 1) multiphase composition (up to 6 minerals) of the aggregates; 2) absence of signs of replacing early minerals by the late ones; 3) essential presence in the aggregates of the minerals of chalcophile elements Ag, Pb, Sb, i. e. elements with a low melting point of their compounds; 4) roundish droplet form of inclusions of minor minerals in the main sulfide, and 5) aggregates' position at the boundary sulfide – quartz or in fractures in vein minerals. Partial melting and crystallization of sulfide melts took place during Paleoproterozoic metamorphic event, when the Neoarchean sulfide-bearing rocks were mid-amphibolite metamorphosed under the temperature > 500 °C. Signs of the Paleoproterozoic metamorphism are found in the ores of the neighboring Cu-Mo porphyry Pellapahk deposit as well. |
format |
Journal Contribution |
topic_facet |
Sulfide melt Galena Freibergite Cульфидный расплав Галенит Фрейбергит ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::M::Metamorphism ASFA_2015::S::Silver |
author |
Kalinin, A. A. Savchenko, Ye. E. |
author_facet |
Kalinin, A. A. Savchenko, Ye. E. |
author_sort |
Kalinin, A. A. |
title |
Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit |
title_short |
Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit |
title_full |
Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit |
title_fullStr |
Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit |
title_full_unstemmed |
Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit |
title_sort |
structures of sulfide melt crystallization as an indication of metamorphism of the ores in the oleninskoe gold deposit |
publishDate |
2020 |
url |
http://hdl.handle.net/1834/41527 |
work_keys_str_mv |
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1756080171126882304 |