02321nmc a2200205 4500 20260520010332.0 260224s xxu CD I116 64 0015469 Cinemática del flanco noroccidental de los Andes de Mérida, Venezuela: interacción entre estructuras de piel fina y piel gruesa 16/11/2016 ; 16/11/2016 17 p. Kinematics of the Northwestern flank of Mérida Andes, Venezuela: Interaction between thick and thinskinned structures The Mérida Andes (MA) constitutes a SW-NE trending asymmetric, doubly vergent orogen, located in the northern part of South America. The main deformation of this belt took place since the Late Miocene as a result of the interaction between the South America, Nazca and Caribbean plates. Study of structures in the northwestern flank of MA, based on subsurface and field data, allow us to recognize kilometric scale structures interpreted as stacked basement wedges. These wedges were inserted in the sedimentary cover following a detachment level located at the base of the early Cretaceous sequences, developing thin skinned thrusts that form duplex structures linked to a passive-roof detachment which generate a triangle zone. In addition, it was observed an important thin and thick-skinned backthrusting in the hangingwall and out of sequence faults that placed basement rocks against Neogene deposits. The balancing of three cross-sections allowed calculate shortenings of ~26 km and ~22 km in the south and central zones respectively, while in the north zone the shortening is about 8 km. This important variation in the tectonic contraction can be assigned to the presence of the Valera fault. Kinematic models were made for each balanced cross-section in order to illustrate the interaction between thick and thin skinned structures, responsible of the MA northwestern flank development from late Miocene to the present CONGTP Requena, Joaquín 55695 Turienzo, Martín 55813 Congreso de Exploración y Desarrollo de Hidrocarburos (9no. : 2014 nov. 3-7 : Mendoza) 54287 189847 189847 https://biblioteca.iapg.org.ar/ArchivosAdjuntos/CONEXPLOR2014/659-CinematicadelFlanco.pdf 0 0 0 0 257666 BAAB BAAB CD I116 64 0015469 2026-03-06 200062093 0 CD I116 64 0015469 200062093 2026-03-06 00:20:00 2026-03-06 ARCHIVO