Paleomagnetism of the Upper Proterozoic and Devonian rocks from the klodzko metamorphic complex in the west Sudetes (SW Poland): tectonic implications for the variscan belt of central Europe

摘要

The Klodzko Metamorphic Complex (KMC) consists of Upper Proterozoic metaigneous and metasedimentary rocks forming a stack pile thrusted over the Givetian and overlain by Frasnian-Fammenian sediments. Magnetomineralogical experiments show that the magnetic minerals are secondary. The paleomagnetic experiments identified three components of the Natural Remanent Magnetization; labeled A1, A2 and M. The mean pole positions calculated in situ correspond with the Baltica Upper Devonian (A1: Plats=-18degrees, PlongE=317degrees), Permo-Carboniferous (A2: PlatS=-39degrees, PlongE=2degrees) and Triassic-Jurassic (M: Plats=-60degreesC, P1ongE=308degrees) segments of the Apparent Polar Wander Path (APWP) for Baltica. This indicates that the region studied was situated close to the Baltica plate at least since the Upper Devonian and was not folded after this period. (C) 2003 Published by Elsevier B.V. [References: 32]