Compartir
Título
Linking metamorphism, magma generation, and synorogenic sedimentation to crustal thickening during Southern Appalachian mountain building, USA
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Lithosphere
Número de la revista
5
Datos de la obra
Stowell, H. H.; Schwartz, J.; Ingram III, S.; Madden, J.; Jermigan, J.; Steltenpohi, M.; Mueller, P. (2019). Linking metamorphism, magma generation, and synorogenic sedimentation to crustal thickening during Southern Appalachian mountain building, USA. Lithosphere, 11, 722-749(5), https://doi.org/10.1130/L1053.1
Editor
The Geological Society of America
Fecha
2019
ISSN
1941-8264
Abstract
[EN] The present-day topography in Iberia is related to geodynamic processes dealing with lithospheric-scale deformation. However, little attention has been paid to the role of inherited crustal- or lithospheric-scale structures involved in the recent observed large-scale topographic patterns. Whereas the analysis of brittle structures focuses on the evolution of Mesozoic sedimentary basins and their subsequent response to tectonic inversion, their contribution to mountain building has been underestimated. Large numbers of structures, from ductile to brittle, which affected the whole lithosphere, were developed during the evolution of the Cantabrian orocline (ca. 310-300 Ma). The contribution of these Paleozoic post-Variscan structures, together with lithospheric mantle evolution and replacement during orocline development in the Mesozoic and Cenozoic geological evolution of Iberia, remains unexplored. To explore the role of these inherited structures on the final configuration of topography during N-S Pyrenean shortening, we carried out a series of analogue experiments complemented by surface velocity field analyses. Our experiments indicate that strain was concentrated along preexisting crustal- to lithospheric-scale discontinuities, and they show several reactivation events marked by differences in the velocity vector field. Differences in fault displacement were also observed in the models depending upon preexisting fault trends. The obtained results may explain the different amount of displacement observed during the reactivation of some of the post-orocline structures in Iberia during the Cenozoic, indicating the key role of unveiled structures, which probably have accommodated most of the Alpine shortening.
Materia
Palabras clave
Peer review
SI
URI
DOI
Aparece en las colecciones
- Untitled [5577]
Files in questo item
Tamaño:
2.704
xmlui.dri2xhtml.METS-1.0.size-megabytes
Formato:
Adobe PDF