Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia
Mineralization of Te and Se was found in gold deposits and uranium occurrences, located in the Paleoproterozoic greenstone belts in Northern Fennoscandia. These deposits are of different genesis, but all of them formed at the late stages of the Svecofennian orogeny, and they have common geochemical...
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2021
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ftdoajarticles:oai:doaj.org/article:46c6402e09de4327aa4080fb1c8d9d7c 2023-05-15T16:11:52+02:00 Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia Arkadii A. Kalinin 2021-05-01T00:00:00Z https://doi.org/10.3390/min11060574 https://doaj.org/article/46c6402e09de4327aa4080fb1c8d9d7c EN eng MDPI AG https://www.mdpi.com/2075-163X/11/6/574 https://doaj.org/toc/2075-163X doi:10.3390/min11060574 2075-163X https://doaj.org/article/46c6402e09de4327aa4080fb1c8d9d7c Minerals, Vol 11, Iss 574, p 574 (2021) Fennoscandian Shield Salla-Koulajarvi belt Mayskoe gold deposit Ozernoe uranium occurrence kawazulite skippenite Mineralogy QE351-399.2 article 2021 ftdoajarticles https://doi.org/10.3390/min11060574 2022-12-31T12:36:25Z Mineralization of Te and Se was found in gold deposits and uranium occurrences, located in the Paleoproterozoic greenstone belts in Northern Fennoscandia. These deposits are of different genesis, but all of them formed at the late stages of the Svecofennian orogeny, and they have common geochemical association of metals Au, Cu, Co, U, Bi, Te, and Se. The prevalentTe minerals are Ni and Fe tellurides melonite and frohbergite, and Pb telluride altaite. Bismuth tellurides were detected in many deposits in the region, but usually not more than in two–three grains. The main selenide in the studied deposits is clausthalite. The most diversified selenium mineralization (clausthalite, klockmannite, kawazulite, skippenite, poubaite) was discovered in the deposits, located in the Russian part of the Salla-Kuolajarvi belt. Consecutive change of sulfides by tellurides, then by selenotellurides and later by selenides, indicates increase of selenium fugacity, f Se 2 , in relation to f Te 2 and to f S 2 in the mineralizing fluids. Gold-, selenium-, and tellutium-rich fluids are potentially linked with the post-Svecofennian thermal event and intrusion of post-orogenic granites (1.79–1.75 Ga) in the Salla-Kuolajarvi and Perapohja belts. Study of fluid inclusions in quartz from the deposits in the Salla-Kuolajarvi belt showed that the fluids were high-temperature (240→300 °C) with high salinity (up to 26% NaCl-eq.). Composition of all studied selenotellurides, kawazulite-skippenite, and poubaite varies significantly in Se/Te ratio and in Pb content. Skippenite and kawazulite show the full range of Se-Te isomorphism. Ni-Co and Co-Fe substitution plays an important role in melonite and mattagamite: high cobalt was detected in nickel telluride in the Juomasuo and Konttiaho, and mattagamites from Ozernoe and Juomasuo contain significant Fe.In the Ozernoe uranium occurrence, the main mineral-concentrator of selenium is molybdenite, which contains up to 16 wt.% of Se in the marginal parts of the grains. The molybdenite is rich in Re ... Article in Journal/Newspaper Fennoscandia Fennoscandian Directory of Open Access Journals: DOAJ Articles Salla ENVELOPE(28.667,28.667,66.833,66.833) Minerals 11 6 574 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Fennoscandian Shield Salla-Koulajarvi belt Mayskoe gold deposit Ozernoe uranium occurrence kawazulite skippenite Mineralogy QE351-399.2 |
spellingShingle |
Fennoscandian Shield Salla-Koulajarvi belt Mayskoe gold deposit Ozernoe uranium occurrence kawazulite skippenite Mineralogy QE351-399.2 Arkadii A. Kalinin Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia |
topic_facet |
Fennoscandian Shield Salla-Koulajarvi belt Mayskoe gold deposit Ozernoe uranium occurrence kawazulite skippenite Mineralogy QE351-399.2 |
description |
Mineralization of Te and Se was found in gold deposits and uranium occurrences, located in the Paleoproterozoic greenstone belts in Northern Fennoscandia. These deposits are of different genesis, but all of them formed at the late stages of the Svecofennian orogeny, and they have common geochemical association of metals Au, Cu, Co, U, Bi, Te, and Se. The prevalentTe minerals are Ni and Fe tellurides melonite and frohbergite, and Pb telluride altaite. Bismuth tellurides were detected in many deposits in the region, but usually not more than in two–three grains. The main selenide in the studied deposits is clausthalite. The most diversified selenium mineralization (clausthalite, klockmannite, kawazulite, skippenite, poubaite) was discovered in the deposits, located in the Russian part of the Salla-Kuolajarvi belt. Consecutive change of sulfides by tellurides, then by selenotellurides and later by selenides, indicates increase of selenium fugacity, f Se 2 , in relation to f Te 2 and to f S 2 in the mineralizing fluids. Gold-, selenium-, and tellutium-rich fluids are potentially linked with the post-Svecofennian thermal event and intrusion of post-orogenic granites (1.79–1.75 Ga) in the Salla-Kuolajarvi and Perapohja belts. Study of fluid inclusions in quartz from the deposits in the Salla-Kuolajarvi belt showed that the fluids were high-temperature (240→300 °C) with high salinity (up to 26% NaCl-eq.). Composition of all studied selenotellurides, kawazulite-skippenite, and poubaite varies significantly in Se/Te ratio and in Pb content. Skippenite and kawazulite show the full range of Se-Te isomorphism. Ni-Co and Co-Fe substitution plays an important role in melonite and mattagamite: high cobalt was detected in nickel telluride in the Juomasuo and Konttiaho, and mattagamites from Ozernoe and Juomasuo contain significant Fe.In the Ozernoe uranium occurrence, the main mineral-concentrator of selenium is molybdenite, which contains up to 16 wt.% of Se in the marginal parts of the grains. The molybdenite is rich in Re ... |
format |
Article in Journal/Newspaper |
author |
Arkadii A. Kalinin |
author_facet |
Arkadii A. Kalinin |
author_sort |
Arkadii A. Kalinin |
title |
Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia |
title_short |
Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia |
title_full |
Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia |
title_fullStr |
Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia |
title_full_unstemmed |
Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia |
title_sort |
tellurium and selenium mineralogy of gold deposits in northern fennoscandia |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/min11060574 https://doaj.org/article/46c6402e09de4327aa4080fb1c8d9d7c |
long_lat |
ENVELOPE(28.667,28.667,66.833,66.833) |
geographic |
Salla |
geographic_facet |
Salla |
genre |
Fennoscandia Fennoscandian |
genre_facet |
Fennoscandia Fennoscandian |
op_source |
Minerals, Vol 11, Iss 574, p 574 (2021) |
op_relation |
https://www.mdpi.com/2075-163X/11/6/574 https://doaj.org/toc/2075-163X doi:10.3390/min11060574 2075-163X https://doaj.org/article/46c6402e09de4327aa4080fb1c8d9d7c |
op_doi |
https://doi.org/10.3390/min11060574 |
container_title |
Minerals |
container_volume |
11 |
container_issue |
6 |
container_start_page |
574 |
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1765997072830431232 |