| Popis: |
Paleomagnetism is a technique very useful in structural geology providing that the rocks keep a stable record of the paleoearth magnetic field information. Paleomagnetism has been used in deciphering the evolution and geometry of orogens and extensional basins. The evolution of an orogen has many points of view, but the use of paleomagnetism allows (i) calculating vertical and/or horizontal rotations during basin and orogen evolution and hence providing actual data to calculate out-of-plane movements particularly important when constructing cross-sections to calculate shortening, (ii) dating syntectonic sediments at foreland basins, which in combination with exhumation rates, for example, allow for a complete reconstruction of the evolution of the orogen, and (iii) deducing chemical interactions when remagnetization occurs. At larger scale, paleomagnetism has been fundamental for paleogeographic reconstructions and evolution of tectonic plates. |
