Cargas corticales y subcorticales en cuencas intermontanas e intracratónicas, y sus influencias en la historia de subsidencia

DÁVILA, F.M.; ASTINI, R.A.

Mar del Plata

Congreso; VI Congreso de Exploracion y Desarrollo de Hidrocarburos; 2005

Asociación Argentina de Geólogos Petroleros

Abstract. Crustal and subcrustal loads in intermontane and intracratonic basins, and their influence on the subsidence history. In the Central Andes, supracrustal tectonic loading has been extensively invoked to explain retroarc flexure and foreland basin subsidence. However, we present surface and subsurface stratigraphic data from the Sierras Pampeanas broken foreland, Argentina, that suggest a longwavelength subsidence pattern, likely driven by processes occurring in the upper mantle or lower crust. Short-wavelength flexure driven by various factors enhances regional subsidence features.Crustal and subcrustal loads in intermontane and intracratonic basins, and their influence on the subsidence history. In the Central Andes, supracrustal tectonic loading has been extensively invoked to explain retroarc flexure and foreland basin subsidence. However, we present surface and subsurface stratigraphic data from the Sierras Pampeanas broken foreland, Argentina, that suggest a longwavelength subsidence pattern, likely driven by processes occurring in the upper mantle or lower crust. Short-wavelength flexure driven by various factors enhances regional subsidence features.. In the Central Andes, supracrustal tectonic loading has been extensively invoked to explain retroarc flexure and foreland basin subsidence. However, we present surface and subsurface stratigraphic data from the Sierras Pampeanas broken foreland, Argentina, that suggest a longwavelength subsidence pattern, likely driven by processes occurring in the upper mantle or lower crust. Short-wavelength flexure driven by various factors enhances regional subsidence features.