Abstract
Marine Cenozoic strata crop out in the western flank of the North Patagonian Andes at Lago Ranco (40°S) and Ayacara (42°S). These deposits, known as the Estratos de Lago Ranco and Ayacara formations, consist of rhythmic successions of sandstone and siltstone. In order to unravel the sedimentary environment, age, and tectonic history of this area during the Neogene, we conducted sedimentological, ichnological, and micropalaeontological studies. In addition, we dated detrital zircons by U–Pb (LAICPMS and SHRIMP). Our results show that these strata were deposited in a deep-marine environment during the early–middle Miocene. Our findings indicate that the uplift of the western flank of the North Patagonian Andes took place after the early–middle Miocene.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Cembrano, J., Lavenu, A., Reynolds, P., Arancibia, G., López, G., & Sanhueza, A. (2002). Late cenozoic transpressional ductile deformation north of the Nazca-South America–Antarctica triple junction. Tectonophysics,354, 289–314.
Covacevich, V. (1996). Muestreos paleontológicos en el Teciario marino de la costa sur del lago Ranco (p. 4). Informe interno, Servicio Nacional de Geología y Minería.
Hervé, F. (1994). The southern andes between 39° and 44°S latitude: The geological signature of a transpresive tectonic regime related to a magmatic arc. In K. J. Reutter, E. Scheuber & P. Wigger (Eds.), Tectonics of the Southern Central Andes (pp. 243–248). Springer.
Levi, B., Aguilar, A., & Fuenzalida, R. (1966). Reconocimiento geológico en las provincias de Llanquihue y Chiloé. Santiago, Inst. Invest. Geol. 19, p. 45.
Martínez-Pardo, R. (1965). Edad de la Formación Ayacara en Caleta El Manzano e Isla El Manzano. Soc. Geol. Chile, Resúmenes, 19–22.
Sernageomin (1995) Carta metalogénica décima región sur, Chile. SERNAGEOMIN-BRGM, Internal Report IR-95-05. Vol. 10, Santiago.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Encinas, A. et al. (2014). Tectonic Implications of Deep-Marine Miocene Strata in the Western Andean Cordillera of South–Central Chile (40°–42°S). In: Rocha, R., Pais, J., Kullberg, J., Finney, S. (eds) STRATI 2013. Springer Geology. Springer, Cham. https://doi.org/10.1007/978-3-319-04364-7_95
Download citation
DOI: https://doi.org/10.1007/978-3-319-04364-7_95
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-04363-0
Online ISBN: 978-3-319-04364-7
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)