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Título: | The structure of the central Taiwan mountain belt |
Autor: | Brown, Dennis CSIC ORCID ; Alvarez-Marrón, Joaquina CSIC ORCID ; Camanni, Giovanni CSIC ORCID | Palabras clave: | Taiwan trust belt transpression |
Fecha de publicación: | 2012 | Editor: | Sociedad Geológica de España | Citación: | Geo-Temas 13: 485- 487 (2012) | Resumen: | The structure of the Taiwan mountain belt is thought to be that of an imbricate thrust and fold belt developed above a shallowly dipping basal detachment. In recent years, however, a growing amount of seismicity data from the internal part of the mountain belt indicates the existence of widespread fault activity in the middle and lower crust. Here, we present new geological mapping from the central part of Taiwan. We suggest that the foreland basin part of the Western Foothills comprises an imbricate thrust system that is structurally and kinematically linked to a basal detachment at between 7 and 10 km depth. To the east of the foreland basin, in the Hsuehshan Range, our data show the presence of major faults that are steeply dipping and which penetrate deep into the crust. A structural and kinematic model in which this part of the mountain belt forms a zone of transpression better fits the available data. Eastward, in the Central Range, deep water sediments appear to form an allochthon that is being overthrust by Mesozoic basement rocks. The involvement of Mesozoic basement in the deformation is suggestive of the reactivation of pre-existing basin-bounding faults | URI: | http://hdl.handle.net/10261/87583 | Identificadores: | issn: 1567-5172 |
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