Vaikijaur Cu-Au-(Mo) deposit, northern Sweden : preliminary results from fluid inclusion and (O, H) isotope studies
The Vaikijaur Cu-Au-(Mo) deposit is located in the ca. 1.88 Ga calc-alkaline Jokkmokk granitoid near the Archaean-Proterozoic palaeoboundary within the Fennoscandian shield in northern Sweden. The Vaikijaur deposit occupies an area of 2×3 km within the Jokkmokk granitoid and includes stockwork quart...
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Luleå tekniska universitet, Geovetenskap och miljöteknik
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ftluleatu:oai:DiVA.org:ltu-34493 2023-05-15T16:13:02+02:00 Vaikijaur Cu-Au-(Mo) deposit, northern Sweden : preliminary results from fluid inclusion and (O, H) isotope studies Weihed, Pär Lundmark, Christina Broman, C. Boyce, A. 2006 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-34493 eng eng Luleå tekniska universitet, Geovetenskap och miljöteknik Stockholms Universitet Scottish Universities Environmental Research Centre Helsinki : Geological Society of Finland Bulletin of the Geological society of Finland, 0367-5211 Special issue 1 The 27th Nordic Geological Winter Meeting, January 9-12, 2006, Oulu, Finland : abstract volume, p. 95- http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-34493 Local 8b55caa0-ee88-11db-bb5c-000ea68e967b info:eu-repo/semantics/openAccess Geology Geologi Conference paper info:eu-repo/semantics/conferenceObject text 2006 ftluleatu 2022-10-25T20:53:51Z The Vaikijaur Cu-Au-(Mo) deposit is located in the ca. 1.88 Ga calc-alkaline Jokkmokk granitoid near the Archaean-Proterozoic palaeoboundary within the Fennoscandian shield in northern Sweden. The Vaikijaur deposit occupies an area of 2×3 km within the Jokkmokk granitoid and includes stockwork quartz-sulphide veinlets and disseminated sulphides and gold. The mineralized area is characterized by potassic, phyllic and propylitic alteration. A conductive pyrite-rich central part is surrounded by a conductive and magnetic zone with pyrite, chalcopyrite, and gold. Analyses of one metre drill core sections have shown up to 5% Cu and 7 ppm Au. Molybdenite is distributed irregularly in the deposit. Re-Os age data suggest that primary porphyry-style mineralization was associated with the calc-alkaline magmatism at ca. 1.89-1.87 Ga. Molybdenite records also a later metamorphic event at about 1750 Ma (Lundmark et al., 2005).Preliminary fluid inclusion data reveal no evidence for the involvement of high-salinity fluids typically for the Norrbotten Fe oxide-Cu-Au ores. By contrast, fluid inclusions in quartz veinlets associated with the sulphides at Vaikijaur indicate deposition from inflowing low- to medium-salinity aqueous and carbon dioxide-rich fluids. Oxygen and hydrogen isotope compositions of quartz, biotite, chlorite and amphibole in ore-related samples have mixed magmatic and seawater signatures. Godkänd; 2006; 20111007 (andbra) Conference Object Fennoscandian Jokkmokk Northern Sweden Norrbotten Luleå University of Technology Publications (DiVA) Jokkmokk ENVELOPE(20.150,20.150,66.500,66.500) Vaikijaur ENVELOPE(19.817,19.817,66.667,66.667) |
institution |
Open Polar |
collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Geology Geologi |
spellingShingle |
Geology Geologi Weihed, Pär Lundmark, Christina Broman, C. Boyce, A. Vaikijaur Cu-Au-(Mo) deposit, northern Sweden : preliminary results from fluid inclusion and (O, H) isotope studies |
topic_facet |
Geology Geologi |
description |
The Vaikijaur Cu-Au-(Mo) deposit is located in the ca. 1.88 Ga calc-alkaline Jokkmokk granitoid near the Archaean-Proterozoic palaeoboundary within the Fennoscandian shield in northern Sweden. The Vaikijaur deposit occupies an area of 2×3 km within the Jokkmokk granitoid and includes stockwork quartz-sulphide veinlets and disseminated sulphides and gold. The mineralized area is characterized by potassic, phyllic and propylitic alteration. A conductive pyrite-rich central part is surrounded by a conductive and magnetic zone with pyrite, chalcopyrite, and gold. Analyses of one metre drill core sections have shown up to 5% Cu and 7 ppm Au. Molybdenite is distributed irregularly in the deposit. Re-Os age data suggest that primary porphyry-style mineralization was associated with the calc-alkaline magmatism at ca. 1.89-1.87 Ga. Molybdenite records also a later metamorphic event at about 1750 Ma (Lundmark et al., 2005).Preliminary fluid inclusion data reveal no evidence for the involvement of high-salinity fluids typically for the Norrbotten Fe oxide-Cu-Au ores. By contrast, fluid inclusions in quartz veinlets associated with the sulphides at Vaikijaur indicate deposition from inflowing low- to medium-salinity aqueous and carbon dioxide-rich fluids. Oxygen and hydrogen isotope compositions of quartz, biotite, chlorite and amphibole in ore-related samples have mixed magmatic and seawater signatures. Godkänd; 2006; 20111007 (andbra) |
format |
Conference Object |
author |
Weihed, Pär Lundmark, Christina Broman, C. Boyce, A. |
author_facet |
Weihed, Pär Lundmark, Christina Broman, C. Boyce, A. |
author_sort |
Weihed, Pär |
title |
Vaikijaur Cu-Au-(Mo) deposit, northern Sweden : preliminary results from fluid inclusion and (O, H) isotope studies |
title_short |
Vaikijaur Cu-Au-(Mo) deposit, northern Sweden : preliminary results from fluid inclusion and (O, H) isotope studies |
title_full |
Vaikijaur Cu-Au-(Mo) deposit, northern Sweden : preliminary results from fluid inclusion and (O, H) isotope studies |
title_fullStr |
Vaikijaur Cu-Au-(Mo) deposit, northern Sweden : preliminary results from fluid inclusion and (O, H) isotope studies |
title_full_unstemmed |
Vaikijaur Cu-Au-(Mo) deposit, northern Sweden : preliminary results from fluid inclusion and (O, H) isotope studies |
title_sort |
vaikijaur cu-au-(mo) deposit, northern sweden : preliminary results from fluid inclusion and (o, h) isotope studies |
publisher |
Luleå tekniska universitet, Geovetenskap och miljöteknik |
publishDate |
2006 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-34493 |
long_lat |
ENVELOPE(20.150,20.150,66.500,66.500) ENVELOPE(19.817,19.817,66.667,66.667) |
geographic |
Jokkmokk Vaikijaur |
geographic_facet |
Jokkmokk Vaikijaur |
genre |
Fennoscandian Jokkmokk Northern Sweden Norrbotten |
genre_facet |
Fennoscandian Jokkmokk Northern Sweden Norrbotten |
op_relation |
Bulletin of the Geological society of Finland, 0367-5211 Special issue 1 The 27th Nordic Geological Winter Meeting, January 9-12, 2006, Oulu, Finland : abstract volume, p. 95- http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-34493 Local 8b55caa0-ee88-11db-bb5c-000ea68e967b |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1765998638447722496 |