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Geochronology, geochemistry and structural setting of the Uunimäki gold mineralisation, SW Finland

Jaakko Kara; Markku Väisänen; Janne Hokka; Hanna Leväniemi; Markku Tiainen; Iiro Pitkälä; Tuomas Leskelä; Yann Lahaye; Pietari Skyttä

dc.contributor.authorJaakko Kara
dc.contributor.authorMarkku Väisänen
dc.contributor.authorJanne Hokka
dc.contributor.authorHanna Leväniemi
dc.contributor.authorMarkku Tiainen
dc.contributor.authorIiro Pitkälä
dc.contributor.authorTuomas Leskelä
dc.contributor.authorYann Lahaye
dc.contributor.authorPietari Skyttä
dc.date.accessioned2022-10-28T12:27:00Z
dc.date.available2022-10-28T12:27:00Z
dc.identifier.isbn978-952-10-9594-8
dc.identifier.urihttps://www.utupub.fi/handle/10024/159569
dc.description.abstract<p>The Uunimäki gabbro was studied by zircon U-Pb geochronology which yielded an age of ~1.89 Ga, making it one of the oldest plutonic rocks in the Häme Belt. Geochemical analysis of the gabbro reveals that it lacks several characteristics for typical subduction zone rocks: (i) it does not have a negative Ta-Nb anomaly compared to average NMORB-composition, (ii) it shows a rather unfractionated REE pattern, (iii) it lacks clear enrichment of fluid-mobile elements (e.g. Ba, Rb, Th, Pb). Structurally, the Uunimäki gabbro is located at the intersection of several regional features: (i) steep NE-plunging folds, (ii) a ENE-WSW-trending deformation zone immediately to the north and (iii) a large N-S-trending deformation zone to the west. The gabbro itself has been deformed under both brittle and ductile conditions by primarily NW-SE-trending faults and shears.<br /></p>
dc.language.isoen
dc.relation.ispartofseriesREPORT
dc.titleGeochronology, geochemistry and structural setting of the Uunimäki gold mineralisation, SW Finland
dc.identifier.urlhttp://www.seismo.helsinki.fi/ilp/lito2018/Lito2018_Abstract_Volume_color.pdf
dc.identifier.urnURN:NBN:fi-fe2021042720473
dc.relation.volume67
dc.contributor.organizationfi=maantieteen ja geologian laitos, yhteiset|en=Department of Geography and Geology|
dc.contributor.organizationfi=geologia|en=Geology|
dc.contributor.organization-code2606902
dc.contributor.organization-code2606900
dc.converis.publication-id37200266
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/37200266
dc.format.pagerange68
dc.identifier.eisbn978-952-10-9595-5
dc.okm.affiliatedauthorSkyttä, Pietari
dc.okm.affiliatedauthorVäisänen, Markku
dc.okm.affiliatedauthorKara, Jaakko
dc.okm.discipline1171 Geotieteetfi_FI
dc.okm.discipline1171 Geosciencesen_GB
dc.okm.internationalcopublicationnot an international co-publication
dc.okm.internationalityDomestic publication
dc.okm.typeO2 Other
dc.relation.conferenceLITHOSPHERE
dc.title.bookLITHOSPHERE 2018: TENTH SYMPOSIUM ON STRUCTURE, COMPOSITION AND EVOLUTION OF THE LITHOSPHERE: PROGRAMME AND EXTENDED ABSTRACTS
dc.year.issued2018


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