Tournaisian age of granitoids from the Odra Fault Zone (southwestern Poland): equivalent of the Mid-German Crystalline High?

• Published in: International journal of earth sciences : Geologische Rundschau Vol. 95; no. 2; pp. 341 - 349
• Main Authors: Dörr, Wolfgang, Żelaźniewicz, Andrzej, Bylina, Paweł, Schastok, Janina, Franke, Wolfgang, Haack, Udo, Kulicki, Cyprian
• Format: Journal Article
• Language: English
• Published: Berlin Springer Nature B.V 01.04.2006
• Subjects: Boreholes; Carboniferous; Geology; Igneous rocks
• ISSN: 1437-3254; 1437-3262
• DOI: 10.1007/s00531-005-0044-8

Issue Title: Simulation and visualization of geoprocesses The Odra Fault Zone of southwestern Poland is a NW-trending horst marked by gravimetric and magnetic anomalies and composed of high- to low-grade metamorphic and igneous rocks which are only known from boreholes. This zone embraces a concealed border between Variscan internides and externides. It also contains an array of several I-type, metaluminous to peraluminous, high potassic granitoid bodies which intruded earlier metamorphosed rocks. Except for one case, they remain unfoliated and undeformed, and presumably play a role of stitching plutons at the suture between two obliquely colliding terranes. U-Pb TIMS dating of single zircons from one foliated and one unfoliated granitoid samples yielded identical concordant ages of 344±1 Ma (Tournaisian). They resemble a Pb-Pb age of 350±5 Ma obtained for S-type granitoids from the Luckau area further west in Germany, which is generally regarded as an eastern segment of the Mid-German Crystalline High. Carboniferous granitic intrusions in the high are generally younger (340-290 Ma). Correlations of the the Odra Fault Zone with the Mid-German Crystalline High appear plausible, but by no means certain and require further confirmation.[PUBLICATION ABSTRACT]