Tectonic development of the Jalisco Triple Junction (western Mexico) from SPOT-DEM data processing

The Digital Elevation Model of the Jalisco Triple Junction area obtained from a SPOT panchromatic stereopair makes it possible to infer the tectonic development of this area: 1) an old NS trending fault network developed throughout the studied area. The faults which bound the southern Colima Graben are considered as a heritage of this system. 2) The E-W Citala Graben cuts the preceding fault network. 3) The N 135 trending Zacoalco Graben is associated with a detachment fault dipping to the NE and the N 40 trending northern part of the Colima Graben, bounded by the Techaluta Fault, are part of an active fault network associated with the recent development of the Jalisco Triple Junction. There is an abridged English version. -English summary