Resumen de Paleomagnetic reconnaissance of the Región de Los Lagos, southern Chile, and its tectonic implications.
Alfredo Rodolfo Garcia Riccomini, Myrl E. Beck, Russel F. Burmester, Francisco E. Munizaga, Francisco Hervé
Several paleomagnetic sites from upper Paleozoic through upper Tertiary rocks in Southern Chile have given valuable Tectonic information. Paleomagnetic data suggest clockwise rotation associated with the Liquine-Ofqui fault; however, some rocks present a small counterclockwise rotation. Nevertheless, the general pattern of rotation indicates dextral Shear along the fault. These data further suggest that rocks west of the Liquine-Ofqui fault have been transported northward, probably 400 to 500 km, in at least the last 50 Ma. Rocks east of the fault have either had a southward transport or more likely have remained static with respect to cratonal South America. However, errors associated with the rotations and translations are large, and some of these results are suspect. Rotation and translation appear to affect Rocks as young as 3 or 4 Ma, indicating that the Liquine-Ofqui fault has moved recently and probably is still active. Evidence of volcanism associated with the fault supports this result.
