. Estudio de la Génesis y Evolución de la Cordillera Andina en el Norte argentino a partir de las ondulaciones del Geoide

CARUGATI, GUILLERMO; INTROCASO, ANTONIO

Mendoza, Argentina

Congreso; XXIV Reunión Científica Asociación Argentina de Geofísicos y Geodestas – AAGG; 2009

<!-- /* Font Definitions */ @font-face {font-family:"Palatino Linotype"; panose-1:2 4 5 2 5 5 5 3 3 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870009 1073741843 0 0 415 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; mso-bidi-font-size:12.0pt; font-family:"Palatino Linotype"; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> From the Global Geopotential Model EGM2008 available on-line, we have obtained for an Andean section at latitude 24° S:    (1)    An acceptable isostatic compensated crustal model with a 63 km value as the maximum thickness and 440 km of shortening.    (2)    From (1) and assuming: (a) instantaneous deformation, (b) a width/altitude relation for the Andes equal to 100, (c) 6,675 coefficient between the root and the topographic altitude, (d) successive shortening pulses of 50 km step; we have found the mountain range evolution from its origin (27 Ma ago) up to the present.The Earth´s gravity field deformation (gravity anomalies and geoid undulations), increasing from the beginning up to the present, complete this contribution.