Gold occurrences in the Kolmozero-Voronya Archean greenstone belt, Kola region: Geological, mineralogical, geochronological and isotope-geochemical characteristics
A multidisciplinary study of the Oleninskoe and Nyalm-1 gold occurrences located in the Kolmozero-Voronya greenstone belt (Kola region) has been carried out. These gold occurrences are interpreted as orogenic and connected with a complex of gabbrodiorite-diorite-granodiorite-quartz porphyry minor in...
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A.N. Zavaritsky Institute of Geology and Geochemistry
2015
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ftdoajarticles:oai:doaj.org/article:5c63ab956cb24fb2afd5c96ee9143f8b 2023-05-15T16:13:03+02:00 Gold occurrences in the Kolmozero-Voronya Archean greenstone belt, Kola region: Geological, mineralogical, geochronological and isotope-geochemical characteristics N. M. Kudryashov A. A. Kalinin L. M. Lyalina P. A. Serov D. V. Elizarov 2015-12-01T00:00:00Z https://doaj.org/article/5c63ab956cb24fb2afd5c96ee9143f8b EN RU eng rus A.N. Zavaritsky Institute of Geology and Geochemistry https://www.lithosphere.ru/jour/article/view/161 https://doaj.org/toc/1681-9004 https://doaj.org/toc/2500-302X 1681-9004 2500-302X https://doaj.org/article/5c63ab956cb24fb2afd5c96ee9143f8b Литосфера, Vol 0, Iss 6, Pp 83-100 (2015) рудопроявления золота геохронология изотопная геохимия зеленокаменный пояс колмозеро-воронья фенноскандинавский щит неоархей gold isotope-geochronological study greenstone belt kolmozero-voronya fennoscandian shield neoarchean Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 article 2015 ftdoajarticles 2022-12-31T08:54:02Z A multidisciplinary study of the Oleninskoe and Nyalm-1 gold occurrences located in the Kolmozero-Voronya greenstone belt (Kola region) has been carried out. These gold occurrences are interpreted as orogenic and connected with a complex of gabbrodiorite-diorite-granodiorite-quartz porphyry minor intrusions. U-Pb age of zircon from a quartz porphyry dyke in the Oleninskoe occurrence is 2828 ± 8 Ma. An identical age of 2825 ± 7 Ma has been yielded by zircon from a granodiorite porphyry hosting the Nyalm-1 gold mineralization. The gold mineralization was formed in the Neoarchean time after the crystallization of minor intrusions ≈2.83 Ga ago and before the formation of tourmaline-bearing granites and rare-metal pegmatite veins (both dated at ≈2.5 Ga), during hydrothermal alteration of rocks at the retrograde stage of regional metamorphism. Rb-Sr isochron age 2779 ± 72 Ma, obtained for the whole rock samples and apatite from the Nyalm-1 granodiorite porphyry, probably is close to the age of this event. Values of εNd( t ) calculated for granodiorite-porphyries from the Oleninskoe and Nyalm-1 gold occurrences vary from +0.01 to +2.63, suggesting that their parental magma originated from a mantle source and that an addition of crust material was not significant. Article in Journal/Newspaper Fennoscandian Directory of Open Access Journals: DOAJ Articles |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
рудопроявления золота геохронология изотопная геохимия зеленокаменный пояс колмозеро-воронья фенноскандинавский щит неоархей gold isotope-geochronological study greenstone belt kolmozero-voronya fennoscandian shield neoarchean Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
spellingShingle |
рудопроявления золота геохронология изотопная геохимия зеленокаменный пояс колмозеро-воронья фенноскандинавский щит неоархей gold isotope-geochronological study greenstone belt kolmozero-voronya fennoscandian shield neoarchean Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 N. M. Kudryashov A. A. Kalinin L. M. Lyalina P. A. Serov D. V. Elizarov Gold occurrences in the Kolmozero-Voronya Archean greenstone belt, Kola region: Geological, mineralogical, geochronological and isotope-geochemical characteristics |
topic_facet |
рудопроявления золота геохронология изотопная геохимия зеленокаменный пояс колмозеро-воронья фенноскандинавский щит неоархей gold isotope-geochronological study greenstone belt kolmozero-voronya fennoscandian shield neoarchean Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
description |
A multidisciplinary study of the Oleninskoe and Nyalm-1 gold occurrences located in the Kolmozero-Voronya greenstone belt (Kola region) has been carried out. These gold occurrences are interpreted as orogenic and connected with a complex of gabbrodiorite-diorite-granodiorite-quartz porphyry minor intrusions. U-Pb age of zircon from a quartz porphyry dyke in the Oleninskoe occurrence is 2828 ± 8 Ma. An identical age of 2825 ± 7 Ma has been yielded by zircon from a granodiorite porphyry hosting the Nyalm-1 gold mineralization. The gold mineralization was formed in the Neoarchean time after the crystallization of minor intrusions ≈2.83 Ga ago and before the formation of tourmaline-bearing granites and rare-metal pegmatite veins (both dated at ≈2.5 Ga), during hydrothermal alteration of rocks at the retrograde stage of regional metamorphism. Rb-Sr isochron age 2779 ± 72 Ma, obtained for the whole rock samples and apatite from the Nyalm-1 granodiorite porphyry, probably is close to the age of this event. Values of εNd( t ) calculated for granodiorite-porphyries from the Oleninskoe and Nyalm-1 gold occurrences vary from +0.01 to +2.63, suggesting that their parental magma originated from a mantle source and that an addition of crust material was not significant. |
format |
Article in Journal/Newspaper |
author |
N. M. Kudryashov A. A. Kalinin L. M. Lyalina P. A. Serov D. V. Elizarov |
author_facet |
N. M. Kudryashov A. A. Kalinin L. M. Lyalina P. A. Serov D. V. Elizarov |
author_sort |
N. M. Kudryashov |
title |
Gold occurrences in the Kolmozero-Voronya Archean greenstone belt, Kola region: Geological, mineralogical, geochronological and isotope-geochemical characteristics |
title_short |
Gold occurrences in the Kolmozero-Voronya Archean greenstone belt, Kola region: Geological, mineralogical, geochronological and isotope-geochemical characteristics |
title_full |
Gold occurrences in the Kolmozero-Voronya Archean greenstone belt, Kola region: Geological, mineralogical, geochronological and isotope-geochemical characteristics |
title_fullStr |
Gold occurrences in the Kolmozero-Voronya Archean greenstone belt, Kola region: Geological, mineralogical, geochronological and isotope-geochemical characteristics |
title_full_unstemmed |
Gold occurrences in the Kolmozero-Voronya Archean greenstone belt, Kola region: Geological, mineralogical, geochronological and isotope-geochemical characteristics |
title_sort |
gold occurrences in the kolmozero-voronya archean greenstone belt, kola region: geological, mineralogical, geochronological and isotope-geochemical characteristics |
publisher |
A.N. Zavaritsky Institute of Geology and Geochemistry |
publishDate |
2015 |
url |
https://doaj.org/article/5c63ab956cb24fb2afd5c96ee9143f8b |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Литосфера, Vol 0, Iss 6, Pp 83-100 (2015) |
op_relation |
https://www.lithosphere.ru/jour/article/view/161 https://doaj.org/toc/1681-9004 https://doaj.org/toc/2500-302X 1681-9004 2500-302X https://doaj.org/article/5c63ab956cb24fb2afd5c96ee9143f8b |
_version_ |
1765998654925045760 |