Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast
Research subject. This study was devoted to magmatic complexes in Northwestern Chukotka associated with the largest gold and silver deposits across Kupol’skii (Kupol field) and Ilirnei (Dvoinoe and September fields) ore junctions. Materials and methods. The petrogenic elements of ore-containing igne...
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A.N. Zavaritsky Institute of Geology and Geochemistry
2020
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Online Access: | https://doi.org/10.24930/1681-9004-2019-19-6-861-888 https://doaj.org/article/a43ad7b8cebc443ea1c897fc0f7e69b6 |
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ftdoajarticles:oai:doaj.org/article:a43ad7b8cebc443ea1c897fc0f7e69b6 2023-05-15T15:12:34+02:00 Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast V. G. Sakhno L. S. Tsurikova S. O. Maksimov 2020-01-01T00:00:00Z https://doi.org/10.24930/1681-9004-2019-19-6-861-888 https://doaj.org/article/a43ad7b8cebc443ea1c897fc0f7e69b6 EN RU eng rus A.N. Zavaritsky Institute of Geology and Geochemistry https://www.lithosphere.ru/jour/article/view/1223 https://doaj.org/toc/1681-9004 https://doaj.org/toc/2500-302X 1681-9004 2500-302X doi:10.24930/1681-9004-2019-19-6-861-888 https://doaj.org/article/a43ad7b8cebc443ea1c897fc0f7e69b6 Литосфера, Vol 19, Iss 6, Pp 861-888 (2020) magmatism mineralization circumpolar western chukotka shrimp-dating rms generation features Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 article 2020 ftdoajarticles https://doi.org/10.24930/1681-9004-2019-19-6-861-888 2022-12-31T01:55:08Z Research subject. This study was devoted to magmatic complexes in Northwestern Chukotka associated with the largest gold and silver deposits across Kupol’skii (Kupol field) and Ilirnei (Dvoinoe and September fields) ore junctions. Materials and methods. The petrogenic elements of ore-containing igneous rocks were determined using a spectrometer ICAP 6500Duo (USA). An elemental analysis of igneous and ore samples was performed by inductively coupled plasma spectrometry (ICP-MS). The age was determined by zircons (SHRIMP-II, VSEGEI isotope research center, St. Petersburg) using a laser ablation system NWR-213 (USA). Results. New information concerning the dating of magmatic complexes and gold-bearing magmatic systems in the ore junctions under study was obtained. It was established that the manifestations of magmatism in the Kupol and Ilirnei ore junctions differ in terms of the main phase formation age. The age of the Ilirnei ore junction, which is represented by large-volume intrusions of granitoids, leucogranites and volcanites of medium-basic composition, was determined to be 124–114 Ma. The age of mineralization, which is associated with later magmatism phases – small intrusions and a dike complex of predominantly granodiorite composition –, was estimated to be (93– 92) ± 2.0 Ma. In the Kupol ore junction, the magmatism associated with mineralization was dated 91.0 ± 1.4 Ma, while the age of rhyolite dikes containing mineralization was estimated to be 88.9–89.0 Ma.Conclusion. The results of the RMS analysis of the Kupol and Ilirney ore junctions suggest that ore formation in this region was connected with a single stage of activation of deep processes and mantle-crust interaction with participation of deep (mantle) fluids. Article in Journal/Newspaper Arctic Chukotka Directory of Open Access Journals: DOAJ Articles Arctic Ilirney ENVELOPE(167.951,167.951,67.255,67.255) Kupol ENVELOPE(68.533,68.533,-72.633,-72.633) LITHOSPHERE (Russia) 19 6 861 888 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
magmatism mineralization circumpolar western chukotka shrimp-dating rms generation features Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
spellingShingle |
magmatism mineralization circumpolar western chukotka shrimp-dating rms generation features Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 V. G. Sakhno L. S. Tsurikova S. O. Maksimov Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast |
topic_facet |
magmatism mineralization circumpolar western chukotka shrimp-dating rms generation features Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
description |
Research subject. This study was devoted to magmatic complexes in Northwestern Chukotka associated with the largest gold and silver deposits across Kupol’skii (Kupol field) and Ilirnei (Dvoinoe and September fields) ore junctions. Materials and methods. The petrogenic elements of ore-containing igneous rocks were determined using a spectrometer ICAP 6500Duo (USA). An elemental analysis of igneous and ore samples was performed by inductively coupled plasma spectrometry (ICP-MS). The age was determined by zircons (SHRIMP-II, VSEGEI isotope research center, St. Petersburg) using a laser ablation system NWR-213 (USA). Results. New information concerning the dating of magmatic complexes and gold-bearing magmatic systems in the ore junctions under study was obtained. It was established that the manifestations of magmatism in the Kupol and Ilirnei ore junctions differ in terms of the main phase formation age. The age of the Ilirnei ore junction, which is represented by large-volume intrusions of granitoids, leucogranites and volcanites of medium-basic composition, was determined to be 124–114 Ma. The age of mineralization, which is associated with later magmatism phases – small intrusions and a dike complex of predominantly granodiorite composition –, was estimated to be (93– 92) ± 2.0 Ma. In the Kupol ore junction, the magmatism associated with mineralization was dated 91.0 ± 1.4 Ma, while the age of rhyolite dikes containing mineralization was estimated to be 88.9–89.0 Ma.Conclusion. The results of the RMS analysis of the Kupol and Ilirney ore junctions suggest that ore formation in this region was connected with a single stage of activation of deep processes and mantle-crust interaction with participation of deep (mantle) fluids. |
format |
Article in Journal/Newspaper |
author |
V. G. Sakhno L. S. Tsurikova S. O. Maksimov |
author_facet |
V. G. Sakhno L. S. Tsurikova S. O. Maksimov |
author_sort |
V. G. Sakhno |
title |
Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast |
title_short |
Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast |
title_full |
Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast |
title_fullStr |
Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast |
title_full_unstemmed |
Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast |
title_sort |
geochronological and geochemical features of magmatic gold- and silverbearing complexes in the chukotka sector of the russian arctic coast |
publisher |
A.N. Zavaritsky Institute of Geology and Geochemistry |
publishDate |
2020 |
url |
https://doi.org/10.24930/1681-9004-2019-19-6-861-888 https://doaj.org/article/a43ad7b8cebc443ea1c897fc0f7e69b6 |
long_lat |
ENVELOPE(167.951,167.951,67.255,67.255) ENVELOPE(68.533,68.533,-72.633,-72.633) |
geographic |
Arctic Ilirney Kupol |
geographic_facet |
Arctic Ilirney Kupol |
genre |
Arctic Chukotka |
genre_facet |
Arctic Chukotka |
op_source |
Литосфера, Vol 19, Iss 6, Pp 861-888 (2020) |
op_relation |
https://www.lithosphere.ru/jour/article/view/1223 https://doaj.org/toc/1681-9004 https://doaj.org/toc/2500-302X 1681-9004 2500-302X doi:10.24930/1681-9004-2019-19-6-861-888 https://doaj.org/article/a43ad7b8cebc443ea1c897fc0f7e69b6 |
op_doi |
https://doi.org/10.24930/1681-9004-2019-19-6-861-888 |
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LITHOSPHERE (Russia) |
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19 |
container_issue |
6 |
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861 |
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