Structural observations on the Uusikaupunki trondhjemite sheet, SW Finland
1998; Taylor & Francis; Volume: 120; Issue: 4 Linguagem: Inglês
10.1080/11035899801204379
ISSN2000-0863
Autores Tópico(s)Paleontology and Stratigraphy of Fossils
ResumoAbstract The Uusikaupunki trondhjemite is located in SW Finland within high-grade Palaeoproterozoic Svecofennian supracrustal rocks. Three phases of deformation are identified in the supracrustal rocks. The D1 deformation produced a schistosity defined by biotite. The D2 deformation is characterized by recumbent or reclined folds with NW vergences and it is accompanied by thrusting towards the NW. The N–S compression and the E–W shear motion define a transpressional tectonic regime during the D3 deformation. The D3 is associated with F3 folds overturned towards the N. It is suggested that the Uusikaupunki trondhjemite intruded as gently dipping sheets before or during the D2 deformation. Keywords: Trondhjemitestructural analysisigneous rocksdimension stonePalaeoproterozoicSvecofennianUusikaupunkiFinland
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