U-Pb zircon dating of metasedimentary rocks within the Ikkari gold deposit, Central Lapland belt, northern Finland
Abstract. The gold deposit of Ikkari located in Central Lapland belt, near Jeesiö and Rajala villages. Central Lapland belt have been divided to six units from oldest to youngest: Salla group, Kuusamo group, Sodankylä group, Savukoski group, Kittilä suite and Kumpu group. The purpose of this study w...
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ftunivoulu:oai:oulu.fi:nbnfioulu-202212143763 2023-07-30T04:05:50+02:00 U-Pb zircon dating of metasedimentary rocks within the Ikkari gold deposit, Central Lapland belt, northern Finland Harju, S. (Samuli) 2022-12-14 application/pdf http://jultika.oulu.fi/Record/nbnfioulu-202212143763 eng eng University of Oulu info:eu-repo/semantics/openAccess © Samuli Harju, 2022. Except otherwise noted, the reuse of this document is authorised under a Creative Commons Attribution 4.0 International (CC-BY 4.0) licence (https://creativecommons.org/licenses/by/4.0/). This means that reuse is allowed provided appropriate credit is given and any changes are indicated. For any use or reproduction of elements that are not owned by the author(s), permission may need to be directly from the respective right holders. Geologia ja mineralogia info:eu-repo/semantics/masterThesis info:eu-repo/semantics/publishedVersion 2022 ftunivoulu 2023-07-08T20:00:33Z Abstract. The gold deposit of Ikkari located in Central Lapland belt, near Jeesiö and Rajala villages. Central Lapland belt have been divided to six units from oldest to youngest: Salla group, Kuusamo group, Sodankylä group, Savukoski group, Kittilä suite and Kumpu group. The purpose of this study was to figure out how old metasediments of Ikkari are and what stratigraphy unit they represent by using U-Pb method to zircon grains and comparing these age results to older publications. Mineralogy and lithology of the samples were studied in petrography studies from thin section. Two of the samples are conglomerates and eight are sericite-albite altered quartzites. Major zircon populations of the conglomerates occur ca. 2.015 Ga and maximum deposit ages of them occur 1910 ± 10 Ma (120059_A) and 1919 ± 5 Ma (120071_A). Rocks of Kittilä suite and Savukoski group are probably the local source for the sedimentary material of this age. Major zircon populations of the quartzites occur ca. 1.95–1.90 Ga and maximum deposit ages of them are between 1.90–1.86 Ga. The felsic magmatism in the Lapland Granulite belt is potential source for the material of this age zircon populations. Based on U-Pb ages of the detrital zircon populations of this study, samples can be correlated in to the Kumpu group. The conglomerates are slightly older than the quartzites. Metamorphic overgrowth occurs in some zircon grains.U-Pb ikämääritys Ikkarin kultaesiintymän metasedimenttikivien zirkoneista, Keski-Lapin vyöhykkeellä, Pohjois-Suomessa. Tiivistelmä. Ikkarin kultaesiintymä sijaitsee Keski-Lapin vyöhykkeellä, lähellä Jeesiön ja Rajalan kyliä. KeskiLapin vyöhyke koostuu kuudesta stratigrafisesta yksiköstä, vanhimmasta nuorimpaan Sallan ryhmä, Kuusamon ryhmä, Sodankylän ryhmä, Savukosken ryhmä, Kittilän sviitti ja Kummun ryhmä. Tutkimuksen tarkoituksena oli selvittää, Ikkarin metasedimenttien ikäjakauma ja mihin stratigrafiseen yksikköön ne kuuluvat. Ikämääritykset tehtiin metasedimenteissä olevista detritaalisista zirkoneista zirkon U-Pb ... Master Thesis Northern Finland Salla Savukoski Sodankylä Lapland Jultika - University of Oulu repository Jeesiö ENVELOPE(26.042,26.042,67.509,67.509) Kittilä ENVELOPE(23.750,23.750,67.433,67.433) Kumpu ENVELOPE(26.183,26.183,67.383,67.383) Kuusamo ENVELOPE(29.183,29.183,65.967,65.967) Salla ENVELOPE(28.667,28.667,66.833,66.833) Sallan ENVELOPE(22.164,22.164,70.493,70.493) Savukoski ENVELOPE(28.158,28.158,67.293,67.293) Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) |
institution |
Open Polar |
collection |
Jultika - University of Oulu repository |
op_collection_id |
ftunivoulu |
language |
English |
topic |
Geologia ja mineralogia |
spellingShingle |
Geologia ja mineralogia Harju, S. (Samuli) U-Pb zircon dating of metasedimentary rocks within the Ikkari gold deposit, Central Lapland belt, northern Finland |
topic_facet |
Geologia ja mineralogia |
description |
Abstract. The gold deposit of Ikkari located in Central Lapland belt, near Jeesiö and Rajala villages. Central Lapland belt have been divided to six units from oldest to youngest: Salla group, Kuusamo group, Sodankylä group, Savukoski group, Kittilä suite and Kumpu group. The purpose of this study was to figure out how old metasediments of Ikkari are and what stratigraphy unit they represent by using U-Pb method to zircon grains and comparing these age results to older publications. Mineralogy and lithology of the samples were studied in petrography studies from thin section. Two of the samples are conglomerates and eight are sericite-albite altered quartzites. Major zircon populations of the conglomerates occur ca. 2.015 Ga and maximum deposit ages of them occur 1910 ± 10 Ma (120059_A) and 1919 ± 5 Ma (120071_A). Rocks of Kittilä suite and Savukoski group are probably the local source for the sedimentary material of this age. Major zircon populations of the quartzites occur ca. 1.95–1.90 Ga and maximum deposit ages of them are between 1.90–1.86 Ga. The felsic magmatism in the Lapland Granulite belt is potential source for the material of this age zircon populations. Based on U-Pb ages of the detrital zircon populations of this study, samples can be correlated in to the Kumpu group. The conglomerates are slightly older than the quartzites. Metamorphic overgrowth occurs in some zircon grains.U-Pb ikämääritys Ikkarin kultaesiintymän metasedimenttikivien zirkoneista, Keski-Lapin vyöhykkeellä, Pohjois-Suomessa. Tiivistelmä. Ikkarin kultaesiintymä sijaitsee Keski-Lapin vyöhykkeellä, lähellä Jeesiön ja Rajalan kyliä. KeskiLapin vyöhyke koostuu kuudesta stratigrafisesta yksiköstä, vanhimmasta nuorimpaan Sallan ryhmä, Kuusamon ryhmä, Sodankylän ryhmä, Savukosken ryhmä, Kittilän sviitti ja Kummun ryhmä. Tutkimuksen tarkoituksena oli selvittää, Ikkarin metasedimenttien ikäjakauma ja mihin stratigrafiseen yksikköön ne kuuluvat. Ikämääritykset tehtiin metasedimenteissä olevista detritaalisista zirkoneista zirkon U-Pb ... |
format |
Master Thesis |
author |
Harju, S. (Samuli) |
author_facet |
Harju, S. (Samuli) |
author_sort |
Harju, S. (Samuli) |
title |
U-Pb zircon dating of metasedimentary rocks within the Ikkari gold deposit, Central Lapland belt, northern Finland |
title_short |
U-Pb zircon dating of metasedimentary rocks within the Ikkari gold deposit, Central Lapland belt, northern Finland |
title_full |
U-Pb zircon dating of metasedimentary rocks within the Ikkari gold deposit, Central Lapland belt, northern Finland |
title_fullStr |
U-Pb zircon dating of metasedimentary rocks within the Ikkari gold deposit, Central Lapland belt, northern Finland |
title_full_unstemmed |
U-Pb zircon dating of metasedimentary rocks within the Ikkari gold deposit, Central Lapland belt, northern Finland |
title_sort |
u-pb zircon dating of metasedimentary rocks within the ikkari gold deposit, central lapland belt, northern finland |
publisher |
University of Oulu |
publishDate |
2022 |
url |
http://jultika.oulu.fi/Record/nbnfioulu-202212143763 |
long_lat |
ENVELOPE(26.042,26.042,67.509,67.509) ENVELOPE(23.750,23.750,67.433,67.433) ENVELOPE(26.183,26.183,67.383,67.383) ENVELOPE(29.183,29.183,65.967,65.967) ENVELOPE(28.667,28.667,66.833,66.833) ENVELOPE(22.164,22.164,70.493,70.493) ENVELOPE(28.158,28.158,67.293,67.293) ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Jeesiö Kittilä Kumpu Kuusamo Salla Sallan Savukoski Sodankylä |
geographic_facet |
Jeesiö Kittilä Kumpu Kuusamo Salla Sallan Savukoski Sodankylä |
genre |
Northern Finland Salla Savukoski Sodankylä Lapland |
genre_facet |
Northern Finland Salla Savukoski Sodankylä Lapland |
op_rights |
info:eu-repo/semantics/openAccess © Samuli Harju, 2022. Except otherwise noted, the reuse of this document is authorised under a Creative Commons Attribution 4.0 International (CC-BY 4.0) licence (https://creativecommons.org/licenses/by/4.0/). This means that reuse is allowed provided appropriate credit is given and any changes are indicated. For any use or reproduction of elements that are not owned by the author(s), permission may need to be directly from the respective right holders. |
_version_ |
1772818079800098816 |