Kivilompolo Mo mineralization in the Peräpohja belt revisited:trace element geochemistry and Re-Os dating of molybdenite
Abstract The Kivilompolo molybdenite occurrence is located in the northern part of the Peräpoh jabelt, within the lithodemic Ylitornio nappe complex. It is hosted within a deformed porphyritic granite belonging to the pre-orogenic 1.99 Ga Kierovaara suite. The mineralization occurs mostly as coarse-...
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ftunivoulu:oai:oulu.fi:nbnfi-fe202102175165 2023-07-30T04:07:28+02:00 Kivilompolo Mo mineralization in the Peräpohja belt revisited:trace element geochemistry and Re-Os dating of molybdenite Ranta, J.-P. (Jukka-Pekka) Hanski, E. (Eero) Stein, H. (Holly) Goode, M. (Matthew) Mäki, T. (Timo) Taivalkoski, A. (Atte) 2020 application/pdf http://urn.fi/urn:nbn:fi-fe202102175165 eng eng The Geological Society of Finland info:eu-repo/semantics/openAccess © 2020 The Authors. All published content of BGSF is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. https://creativecommons.org/licenses/by-nc/4.0/ Finland Molybdenum Peräpohja belt Porphyry deposits Re-Os dating info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftunivoulu 2023-07-08T19:57:35Z Abstract The Kivilompolo molybdenite occurrence is located in the northern part of the Peräpoh jabelt, within the lithodemic Ylitornio nappe complex. It is hosted within a deformed porphyritic granite belonging to the pre-orogenic 1.99 Ga Kierovaara suite. The mineralization occurs mostly as coarse-grained molybdenite flakes in boudinaged quartz veins, with minor chalcopyrite, pyrite, magnetite, and ilmenite. In this study, we report new geochemical data from the host-rock granite and Re-Os dating results of molybdenite from the mineralization. For the whole-rock geochemistry, the mineralized granite is similar to the Kierovaara suite granites analyzed in previous studies. Also, the ca. 2.0 Ga Re-Os age for molybdenite is equal, within error, to the U-Pb zircon age of the Kierovaara suite granite. In addition, similar molybdenite and uraninite ages have been reported from the Rompas-Rajapalot Au-Co occurrence located 30 km NE of Kivilompolo. We propose that the magmatism at around 2.0 Ga ago initiated the hydrothermal circulation that was responsible for the formation of the molybdenite mineralization at Kivilompolo and the primary uranium mineralization associated with the Rompas-Rajapalot Au-Co occurrence or at least, the magmas provided heating, and in addition potentially saline magmatic fluids and metals from a large, cooling magmatic-hydrothermal system. Article in Journal/Newspaper Ylitornio Jultika - University of Oulu repository Kivilompolo ENVELOPE(24.267,24.267,66.305,66.305) Ylitornio ENVELOPE(23.677,23.677,66.309,66.309) |
institution |
Open Polar |
collection |
Jultika - University of Oulu repository |
op_collection_id |
ftunivoulu |
language |
English |
topic |
Finland Molybdenum Peräpohja belt Porphyry deposits Re-Os dating |
spellingShingle |
Finland Molybdenum Peräpohja belt Porphyry deposits Re-Os dating Ranta, J.-P. (Jukka-Pekka) Hanski, E. (Eero) Stein, H. (Holly) Goode, M. (Matthew) Mäki, T. (Timo) Taivalkoski, A. (Atte) Kivilompolo Mo mineralization in the Peräpohja belt revisited:trace element geochemistry and Re-Os dating of molybdenite |
topic_facet |
Finland Molybdenum Peräpohja belt Porphyry deposits Re-Os dating |
description |
Abstract The Kivilompolo molybdenite occurrence is located in the northern part of the Peräpoh jabelt, within the lithodemic Ylitornio nappe complex. It is hosted within a deformed porphyritic granite belonging to the pre-orogenic 1.99 Ga Kierovaara suite. The mineralization occurs mostly as coarse-grained molybdenite flakes in boudinaged quartz veins, with minor chalcopyrite, pyrite, magnetite, and ilmenite. In this study, we report new geochemical data from the host-rock granite and Re-Os dating results of molybdenite from the mineralization. For the whole-rock geochemistry, the mineralized granite is similar to the Kierovaara suite granites analyzed in previous studies. Also, the ca. 2.0 Ga Re-Os age for molybdenite is equal, within error, to the U-Pb zircon age of the Kierovaara suite granite. In addition, similar molybdenite and uraninite ages have been reported from the Rompas-Rajapalot Au-Co occurrence located 30 km NE of Kivilompolo. We propose that the magmatism at around 2.0 Ga ago initiated the hydrothermal circulation that was responsible for the formation of the molybdenite mineralization at Kivilompolo and the primary uranium mineralization associated with the Rompas-Rajapalot Au-Co occurrence or at least, the magmas provided heating, and in addition potentially saline magmatic fluids and metals from a large, cooling magmatic-hydrothermal system. |
format |
Article in Journal/Newspaper |
author |
Ranta, J.-P. (Jukka-Pekka) Hanski, E. (Eero) Stein, H. (Holly) Goode, M. (Matthew) Mäki, T. (Timo) Taivalkoski, A. (Atte) |
author_facet |
Ranta, J.-P. (Jukka-Pekka) Hanski, E. (Eero) Stein, H. (Holly) Goode, M. (Matthew) Mäki, T. (Timo) Taivalkoski, A. (Atte) |
author_sort |
Ranta, J.-P. (Jukka-Pekka) |
title |
Kivilompolo Mo mineralization in the Peräpohja belt revisited:trace element geochemistry and Re-Os dating of molybdenite |
title_short |
Kivilompolo Mo mineralization in the Peräpohja belt revisited:trace element geochemistry and Re-Os dating of molybdenite |
title_full |
Kivilompolo Mo mineralization in the Peräpohja belt revisited:trace element geochemistry and Re-Os dating of molybdenite |
title_fullStr |
Kivilompolo Mo mineralization in the Peräpohja belt revisited:trace element geochemistry and Re-Os dating of molybdenite |
title_full_unstemmed |
Kivilompolo Mo mineralization in the Peräpohja belt revisited:trace element geochemistry and Re-Os dating of molybdenite |
title_sort |
kivilompolo mo mineralization in the peräpohja belt revisited:trace element geochemistry and re-os dating of molybdenite |
publisher |
The Geological Society of Finland |
publishDate |
2020 |
url |
http://urn.fi/urn:nbn:fi-fe202102175165 |
long_lat |
ENVELOPE(24.267,24.267,66.305,66.305) ENVELOPE(23.677,23.677,66.309,66.309) |
geographic |
Kivilompolo Ylitornio |
geographic_facet |
Kivilompolo Ylitornio |
genre |
Ylitornio |
genre_facet |
Ylitornio |
op_rights |
info:eu-repo/semantics/openAccess © 2020 The Authors. All published content of BGSF is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. https://creativecommons.org/licenses/by-nc/4.0/ |
_version_ |
1772820774988546048 |