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This paper presents results of preliminary geochemical studies of ultrabasic rocks occurring in the eastern part of the metamorphic envelope of the Karkonosze granite intrusion. They fom two small, stock-shaped bodies within: 1) amphibolites (locality: popiel Hill, nearby Janowice Wielkie) and (2) amongst greenschists (locality: Niedamirów). obtained results indicate that theymay represent subduction-related cumulates formed in early stages of the fractional crystallisation of the ultrabasic melt. The lack of any deformational features in analysed rocks suggests their emplacement just after the main phase of regional metamorphism, which affected their host rocks. A Lower Carboniferous age of these intrusions and their closely relationship to an early volcanic activity recorded in sedimentary series of the Intrasudetic Basin also is postulated.
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Tom
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93--108
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Bibliogr. 43 poz.
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- Instytut Nauk Geologicznych Uniwersytetu Wrocławskiego Pl. M. Borna 9 50-205 Wrocław
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bwmeta1.element.baztech-article-BSL3-0002-0047