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Title: Tectonic geomorphology of the Acambay Graben, central Mexican volcanic belt
Author: Ramirez-Herrera, Maria Teresa
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1994
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Relevant geomorphological evidence indicative of neotectonic activity in the Acambay graben, a major structure in the central part the Mexican Volcanic Belt, has been derived from topographic maps, in conjunction with morphometric analysis and detailed field mapping, and remote sensing analysis, employing large-scale aerial photos and digitally enhanced Landsat imagery. The Acambay-Tixmadeje, Pastores, Venta de Bravo and Temascalcingo fault systems, which are generally orientated east-west, are associated with linear ridges, sag ponds, offset drainage and shutter and compression ridges which indicate a left-lateral component. Prominent fault scarps and triangular facets show vertical displacement along the faults flanking the graben. The existence and freshness of such morphological features implies that these faults have been active during the Quaternary. Tectonic landforms in the Acambay graben reflect faulting characterised by normal south-facing and normal north-facing faults combined with left-lateral displacement. Geomorphological data for the Acambay graben are consistent with a system of faults which have experienced transtensive, large-scale, left-lateral shear along the Mexican Volcanic Belt. Morphological evidence and the historical occurrence of seismic activity reveal areas of more active tectonics and seismic risk along the Acambay graben. Morphotectonic characteristics of the Venta de Bravo fault system suggest that it is the most seismic and potentially active fault system in the Acambay graben.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available