Zircon dating of the basalt and felsic dyke in Haveri, SW Finland

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dc.contributor.authorKara Jaakko
dc.contributor.authorVäisänen Markku
dc.contributor.authorO'Brien Hugh
dc.contributor.organizationfi=geologia|en=Geology |
dc.contributor.organization-code1.2.246.10.2458963.20.72020864681
dc.converis.publication-id177978350
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/177978350
dc.date.accessioned2025-08-28T01:36:13Z
dc.date.available2025-08-28T01:36:13Z
dc.description.abstract<p>The E-MORB type Haveri basalt differs from the volcanic arc type rocks in the Tampere<br>belt showing no subduction signature. It is considered to have formed in a marginal<br>basin prior to the volcanic arc. We present here zircon U-Pb dating on two samples. The<br>basalt and the felsic dyke yielded 207Pb/206Pb ages of 1902 ± 5 Ma and 1891 ± 2 Ma,<br>respectively, interpreted as crystallisation ages. The basalt also contains older 1.98 Ga<br>grains while the felsic dyke contains older 1.92 Ga, 1.94 Ga, 1.98 Ga and 2.0 Ga grains,<br>which are inferred as inherited. The age dating of E-MORB type basalts can be used to<br>identify the extensional episodes of the accretionary Svecofennian orogeny.<br></p>
dc.format.pagerange109
dc.format.pagerange118
dc.identifier.eissn1799-4632
dc.identifier.jour-issn0367-5211
dc.identifier.olddbid207780
dc.identifier.oldhandle10024/190807
dc.identifier.urihttps://www.utupub.fi/handle/11111/57192
dc.identifier.urlhttp://dx.doi.org/10.17741%2Fbgsf%2F94.2.001
dc.identifier.urnURN:NBN:fi-fe202301265900
dc.language.isoen
dc.okm.affiliatedauthorKara, Jaakko
dc.okm.affiliatedauthorVäisänen, Markku
dc.okm.discipline1171 Geosciencesen_GB
dc.okm.discipline1171 Geotieteetfi_FI
dc.okm.internationalcopublicationnot an international co-publication
dc.okm.internationalityDomestic publication
dc.okm.typeA1 ScientificArticle
dc.publisherGeological Society of Finland
dc.publisher.countryFinlanden_GB
dc.publisher.countrySuomifi_FI
dc.publisher.country-codeFI
dc.relation.doi10.17741/bgsf/94.2.001
dc.relation.ispartofjournalBulletin of the Geological Society of Finland
dc.relation.issue2
dc.relation.volume94
dc.source.identifierhttps://www.utupub.fi/handle/10024/190807
dc.titleZircon dating of the basalt and felsic dyke in Haveri, SW Finland
dc.year.issued2022

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