Influence of diapirs on the development of non-cylindrical arcuate fold-and-thrust belts: Results from analogue models of progressive arcs
In this paper, we present analogue models built to test the diapir role on the along-strike segmentation of fold-and-thrust belts in progressive arcs. To model the progressive arc, we used a protruding backstop that deformed in map view while the experiments run. This backstop indented a parallelepi...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/15164 |
| Acceso en línea: | http://hdl.handle.net/10272/15164 |
| Access Level: | acceso abierto |
| Palabra clave: | Progressive arc Fold-and-thrust belt Diapir Analogue model Arco progresivo Cinturón de pliegues y cabalgamientos Diapiro Modelo analógico |
| Sumario: | In this paper, we present analogue models built to test the diapir role on the along-strike segmentation of fold-and-thrust belts in progressive arcs. To model the progressive arc, we used a protruding backstop that deformed in map view while the experiments run. This backstop indented a parallelepiped formed by silicone at the bottom and sand, in which silicone cylinders were added to simulate diapirs. Various types of models with different size and distribution of the diapirs were made in order to investigate the strain partitioning modes around these heterogeneities. The deformation style of the models is characterized by a highly non-cylindrical arcuate fold-and-thrust belt with blocks bounded by normal or strike-slip faults that strongly rotated clockwise or anticlockwise. The diapirs are key heterogeneities for the nucléation and linking of structures at the beginning of the experiment. When shortening proceed, their influence on the fold-and-thrust belt geometry diminished with respect to that of the backstop protrusion |
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