Rapakivi-related basement structures in the Baltic Sea area; a regional approach

Autor:	Tom Flodén, Väino Puura
Rok vydání:	2000
Předmět:	Underplating geography geography.geographical_feature_category Geochemistry Paleontology Geology Crust Massif Igneous rock Basement (geology) Magmatism Mafic East European Craton Geomorphology
Zdroj:	GFF. 122:257-272
ISSN:	2000-0863 1103-5897
DOI:	10.1080/11035890001223257
Popis:	The largest massifs of rapakivi granites and related rocks in the western part of the East European Craton are located within the junction area of the Baltic Sea and the Gulfs of Bothnia, Finland and Riga, and along the Gulf of Finland. The rapakivi massifs are of Palaeoproterozoic to Mesoproterozoic (Subjotnian) age, ranging from about 1.67 to 1.5 Ga. In the framework of the Palaeoproterozoic basement tectonics, all major and minor occurrences of rapakivi magmatism are areally limited to within the boundaries of the Svecofennian juvenile crustal domain and its frontiers. The most voluminous of the intrusive bodies are located within the originally thickest (55–65 km) primary part of Svecofennia, where they are coupled with crustal thinning to 40–45 km and mafic underplating anomalies. Only minor rapakivi bodies have intruded the originally thinner (40–45 km) peripheral Palaeoproterozoic crust. The largest igneous subprovinces, namely the Wiborg and Riga-Aland rapakivi massifs, are furthermore co...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::28ff363ce1d0c5c8a4bd1b3c9599f20d https://doi.org/10.1080/11035890001223257 Zobrazit plný text záznamu