A shoshonitic dyke in Lohja, Southern Finland

We describe here a newly discovered cross-cutting mafic dyke in the vicinity of Lohja, southern Finland. The dyke is E-W trending and about 6 m in width. Only a few zircons were recovered from the dyke despite the high Zr contents and they all were inherited. Therefore, the crystallisation age remai...

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Bibliographic Details
Main Authors: Hugh O’Brien, Jaakko Kara, Marek Lehtinen, Markku Väisänen, Marja Lehtonen
Other Authors: geologia, Geology, 2606902
Language:English
Published: Suomi 2022
Subjects:
Fennoscandia
Online Access:https://www.utupub.fi/handle/10024/161662
http://www.seismo.helsinki.fi/pdf/Lito2016.pdf
Description
Summary:We describe here a newly discovered cross-cutting mafic dyke in the vicinity of Lohja, southern Finland. The dyke is E-W trending and about 6 m in width. Only a few zircons were recovered from the dyke despite the high Zr contents and they all were inherited. Therefore, the crystallisation age remains uncertain. The dyke is shoshonitic in composition and the closest analogues are the åva lamprophyre dykes in SW Finland.

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