Linking changes in tectonic style with magmatism in northern Europe during the late Carboniferous to latest Permian
作者： Martin Jan Timmerman , Michel Heeremans , Linda A. Kirstein , Bjørn Tore Larsen , Elizabeth-Anne Spencer-Dunworth
DOI: 10.1016/J.TECTO.2009.03.011
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摘要: Abstract Early Carboniferous to Permian magmatism associated with rifting within the northern foreland of Variscan Orogen was widespread across Europe. During long period magmatic activity regional tectonic setting changed region from early extension and basin formation a rifting–wrenching style deformation in late (Stephanian) Permian. Wrenching faulting were accompanied by widespread, voluminous episodic extrusion, intrusion underplating. This followed thermal relaxation development Northern Southern Basins later times. Thermal punctuated Permo-Triassic phase graben formation. 40Ar/39Ar Ar step-heating dating for mineral separates whole-rock samples rocks southern Scandinavia (Oslo Graben south Sweden) Rugen (north Germany) provides further radiometric evidence three proposed periods region. Latest earliest ages (c. 300–310 Ma) obtained volcanic Oslo dolerite sills dykes Sweden north Germany. can be time-correlated that occurred throughout Europe during large-scale dextral wrenching Orogeny. A second alkaline intrusions is confined related caldera collapse around c. 275 Ma. The third, 250 Ma) considered new cycle involving triggered minor melting enriched, fertile mantle.
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