Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type
Trace element analyses of magnetite samples from multiple ore deposits worldwide have recently been conducted, using both EPMA and LA-ICPMS, in order to try and understand the petrogenesis of Kiruna-type ore deposits. Here I employ literature data and new data from Kiruna and Grängesberg (Sweden) t...
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Uppsala universitet, Institutionen för geovetenskaper
2020
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ftuppsalauniv:oai:DiVA.org:uu-404021 2023-05-15T17:04:00+02:00 Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type Kinson, Siôn 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-404021 eng eng Uppsala universitet, Institutionen för geovetenskaper Examensarbete vid Institutionen för geovetenskaper, 1650-6553 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-404021 info:eu-repo/semantics/openAccess EPMA LA-ICPMS petrogenesis magnetite orthomagmatic igneous hydrothermal alteration petrogenes magnetit ortomagmatisk stollande hydrotermisk förändring Geology Geologi Geochemistry Geokemi Student thesis info:eu-repo/semantics/bachelorThesis text 2020 ftuppsalauniv 2023-02-23T21:51:35Z Trace element analyses of magnetite samples from multiple ore deposits worldwide have recently been conducted, using both EPMA and LA-ICPMS, in order to try and understand the petrogenesis of Kiruna-type ore deposits. Here I employ literature data and new data from Kiruna and Grängesberg (Sweden) to help constrain and visualise evolutionary trends recorded by our samples and derive an overall model for the evolutionary processes that lead to Kiruna-type deposits. The evolutionary trend of a Kiruna-type ore from a primarily igneous source (orthomagmatic), into a more hydrothermally controlled system with alteration at a later (cooler) stage, has recently been put forward as a key explanation for how such deposits are formed, rivalling the idea of potential hydrothermal replacement to form such magnetite deposits. Trace element analysis of Kiruna-type magnetites show that the influence of hydrothermal activity may have occurred, subsequent to magmatic formational conditions, such as late stage hydrothermal interaction during the end of a volcanic cycle. An opportunity for further discussion derives from isolated values that do not plot in linear trends, i.e. Kiruna sample data, not plotting within the Kiruna field on a Ni/Cr+Mn vs. Ti+V discriminant diagram. Spårelementsammansättningen i magnetit från järnmineraliseringar av Kiruna-typ världen över har använts för att försöka förstå ursprunget och utveckling av denna malm. I detta arbete har både litteratur- och ny EMP och LAICPMS-data från Kiruna och Grängesberg (Sverige) använts för att visa deras metallogenetiska utveckling samt för att ge en generell förklaringsmodell för de processer som leder till bildning av denna malmtyp. Bildning och utveckling av Kiruna-typmineraliseringar, från en övervägande magmatisk källa (ortomagmatisk) till ett hydrotermalt kontrollerat system under sjunkande temperaturer har nyligen föreslagits, som står i kontrast till tolkningen att de bildas genom hydrotermala ersättningsprocesser. ... Bachelor Thesis Kiruna Uppsala University: Publications (DiVA) Kiruna Malm ENVELOPE(12.222,12.222,65.323,65.323) |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
EPMA LA-ICPMS petrogenesis magnetite orthomagmatic igneous hydrothermal alteration petrogenes magnetit ortomagmatisk stollande hydrotermisk förändring Geology Geologi Geochemistry Geokemi |
spellingShingle |
EPMA LA-ICPMS petrogenesis magnetite orthomagmatic igneous hydrothermal alteration petrogenes magnetit ortomagmatisk stollande hydrotermisk förändring Geology Geologi Geochemistry Geokemi Kinson, Siôn Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type |
topic_facet |
EPMA LA-ICPMS petrogenesis magnetite orthomagmatic igneous hydrothermal alteration petrogenes magnetit ortomagmatisk stollande hydrotermisk förändring Geology Geologi Geochemistry Geokemi |
description |
Trace element analyses of magnetite samples from multiple ore deposits worldwide have recently been conducted, using both EPMA and LA-ICPMS, in order to try and understand the petrogenesis of Kiruna-type ore deposits. Here I employ literature data and new data from Kiruna and Grängesberg (Sweden) to help constrain and visualise evolutionary trends recorded by our samples and derive an overall model for the evolutionary processes that lead to Kiruna-type deposits. The evolutionary trend of a Kiruna-type ore from a primarily igneous source (orthomagmatic), into a more hydrothermally controlled system with alteration at a later (cooler) stage, has recently been put forward as a key explanation for how such deposits are formed, rivalling the idea of potential hydrothermal replacement to form such magnetite deposits. Trace element analysis of Kiruna-type magnetites show that the influence of hydrothermal activity may have occurred, subsequent to magmatic formational conditions, such as late stage hydrothermal interaction during the end of a volcanic cycle. An opportunity for further discussion derives from isolated values that do not plot in linear trends, i.e. Kiruna sample data, not plotting within the Kiruna field on a Ni/Cr+Mn vs. Ti+V discriminant diagram. Spårelementsammansättningen i magnetit från järnmineraliseringar av Kiruna-typ världen över har använts för att försöka förstå ursprunget och utveckling av denna malm. I detta arbete har både litteratur- och ny EMP och LAICPMS-data från Kiruna och Grängesberg (Sverige) använts för att visa deras metallogenetiska utveckling samt för att ge en generell förklaringsmodell för de processer som leder till bildning av denna malmtyp. Bildning och utveckling av Kiruna-typmineraliseringar, från en övervägande magmatisk källa (ortomagmatisk) till ett hydrotermalt kontrollerat system under sjunkande temperaturer har nyligen föreslagits, som står i kontrast till tolkningen att de bildas genom hydrotermala ersättningsprocesser. ... |
format |
Bachelor Thesis |
author |
Kinson, Siôn |
author_facet |
Kinson, Siôn |
author_sort |
Kinson, Siôn |
title |
Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type |
title_short |
Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type |
title_full |
Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type |
title_fullStr |
Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type |
title_full_unstemmed |
Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type |
title_sort |
laser ablation in magnetites; unravelling the signatures of trace element patterns for ore petrogenesis : trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the kiruna type |
publisher |
Uppsala universitet, Institutionen för geovetenskaper |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-404021 |
long_lat |
ENVELOPE(12.222,12.222,65.323,65.323) |
geographic |
Kiruna Malm |
geographic_facet |
Kiruna Malm |
genre |
Kiruna |
genre_facet |
Kiruna |
op_relation |
Examensarbete vid Institutionen för geovetenskaper, 1650-6553 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-404021 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766058027986714624 |