Proceedings of the 12th International INQUA meeting on paleoseismology, active tectonic and archaeoseismology

A N A L O G M O D E L S R E S U LT S The expressed geometry can be observed when sectioning the models obtained into E-W profiles. The result is a compressional structural complex of reverse faults, which form up to two pop-up structures (Pup1 and Pup2, Fig. 3). Pup1 evolves into a fault-bend fold with a width of approximately 10-12 cm. Pup2 forms a symmetric fan-shaped fold. The height reached by Pup2 above the pre-tectonic sequence (PTS) is lower than that of Pup1. Pup2 only appears in some models, while Pup1 is always present. The syntectonic sequence (SS) is represented by the intercalation of blue and white layers deposited during the compression process over the pre-existing stratigraphic sequence (PTS, Fig. 3). The latter is observed as the intercalation of layers of white and black sand and represents volcano- sedimentary rock units (Fig. 3). From the analysis of the various models, it a directly proportional behavior is observed as the syntectonic sedimentation rate varies for: (a) the height of the Coulomb wedge, (b) the displacement of the Pa fault, (c) the angle of the Pa2 fault, and (d) the slope of the PTS wedge (Figs. 3 and 4). On the other hand, an inversely proportional behavior is observed with the sedimentation rate of: (a) the distance between the propagation front of the PTS wedge and the Pa fault and (b) the topographic slope of the wedge (Figs. 3 and 4). More complex structural geometry is expressed in models without sedimentation compared to models or areas where the structural system presents higher syntectonic sedimentation (Fig. 4). ogy, Active Tectonics and Archaeoseismology (PATA), 024, Los Andes, Chile Fig. 3: Sectional view of a base model indicating recurrent and significant structures in the series of analog models. The pre- tectonic sequence (PTS) is also highlighted (white and black sand), along with the syntectonic sequence (SS) deposited simultaneously with the compression process (sequence in white and blue sand). Fig. 3: Sectional view of a base model indicating recurrent and significant structures in the series of analog models. The pre-tectonic sequence (PTS) is also highlighted (white and black sand), along with the syntectonic sequence (SS) deposited simultaneously with the compression process (sequence in white and blue sand).