Multiply remagnetized Silurian carbonate sequence in Estonia; pp. 170–180

Abstract

Palaeomagnetic studies were carried out on Silurian sedimentary rocks of Estonia. The studied sequence (126 samples from 4 localities) is composed of Silurian lime- and dolostones of Llandovery and Wenlock age (444–423 Ma). Rock magnetic data revealed magnetite, (titano)hematite, and pyrrhotite as the main carriers of remanent magnetization. We found that different secondary magnetizations characterize rocks at different localities, whereas similarities exist between the localities. The virtual poles fall near the Silurian–Early Devonian and Late Palaeozoic segment of the Baltica’s APWP. The heritage of these components is related to either syndepositional or early diagenetic changes, and to chemical remagnetization due to late diagenetic processes and/or regional events that affected Baltica during the Late Palaeozoic.