[SEM18-P02] Remagnetization during vertical axis rotation. A Carboniferous tale from the Iberian peninsula.
We have performed a paleomagnetic study on Carboniferous granitoids and Cambrian and carboniferous limestones within the hinge of the curve. Paleomagnetic and rock magnetic results show a primary magnetization in Carboniferous granitoids and a widespread Carboniferous remagnetization in the sedimentary rocks studied.
Granitoids show ca. 70° counter-clockwise rotations consistent with the southern limb of the Cantabrian Orocline (the one to the north). Post-kinematic granitoids and Cambrian limestones show consistent inclinations but very scattered declinations suggesting that they were magnetized coevally to and after the ~ 70° rotation. Our results show no differential rotations between northern, southern limb and the hinge zone. Therefore, I discard a late Carboniferous oroclinal origin for the Central Iberian curve.