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    Tectono-magmatic evolution of Central Chile

    Description: This is in one of the most classic sections between the Pacific coast and the Andean foreland in Argentina, visited by Charles Darwin in 1835. The Andes consist here of the following morphologic units, from west to east: Coastal Cordillera, Principal Cordillera, Frontal Cordillera, Precordillera and Sierras Pampeanas. The highest ridge of the Principal Cordillera forms the water divide and marks the international border. This section is located in the southern part of the Pampean flat-slab subduction segment (~27ºS to ~33ºS). Here, the Juan Fernández Ridge subducts with an angle of ~15º E beneath the forearc to almost horizontal beneath the retroarc. The objective of this 6-days field-trip is to introduce the participants in the general aspects of the tectonic evolution of the Andean cordillera. The trip will start in Viña del Mar and move ~100 km to the north to visit the Late Carboniferous Coastal Batholith, the late Paleozoic accretionary complex, Triassic outcrops, and Plio-Quaternary deposits and landforms. From there we will move to the south-east crossing the Coastal Cordillera to reach the Aconcagua valley and go east crossing the western Principal Cordillera and reach the international border. On the eastern Andean versant, we will follow the Mendoza valley and cross the eastern Principal Cordillera, the Frontal Cordillera and the Precordillera and reach the city of Mendoza in the Andean foreland. On the way we will cross Jurassic, Triassic, Cretaceous and Cenozoic stratified volcanic and sedimentary deposits and plutonic units. Stops are considered in the best exposed examples.

    Program / Itinerary (tentative):

    • Viña del Mar – Los Vilos
    • Los Vilos – Punta Claditas – Los Vilos
    • Los Vilos – Uspallata
    • Uspallata – Mendoza
    • Mendoza – Uspallata
    • Uspallata – Santiago

    Tentative travel and field trip hours are approximately 10 hours a day.  In some sectors, participants will have to walk through rough terrain.


    Reynaldo Charrier

    Born: January 1941 in Santiago de Chile
    Studies: Geologist – Universidad de Chile; Dr. Natural Sciences – Free University Berlin
    Full Professor: University of Chile and Universidad Andrés Bello (Santiago)
    Lectures: Structural Geology, Field Geology, Geology of Chile.
    Awards:

    • Corresponding Member of the Argentinian Geological Association
    • National Prize in Geology, Geological Society, Chile
    • Honorary Fellow of the Geological Society of America

    Selected references:

    Charrier, R., Baeza, O., Elgueta, S., Flynn, J.J., Gans, P., Kay, S.M., Muñoz, N., Wyss, A.R., and Zurita, E., 2002. Evidence for Cenozoic extensional basin development and tectonic inversion south of the flat-slab segment, southern Central Andes, Chile, (33º-36º S.L.). Journal of South American Earth Sciences, Vol. 15, p. 117-139.

    Charrier, R., Chávez, A., Elgueta, S., Hérail, G., Flynn, J.J., Croft, D., Wyss, A., Riquelme, R. y García, M., 2005. Rapid tectonic and paleogeographic evolution associated with the development of the Chucal Anticline and the Chucal-Lauca Basin in the Altiplano of Arica, northern Chile. Journal of South American Earth Sciences (Número Especial sobre Evolución de Cuencas Cenozoicas Andinas, editado por R. Charrier y G. Hérail), Vol. 19, Nº 1, p. 35-54.

    Charrier, R., Pinto, L. y Rodríguez, M.P., 2007. Tectono-stratigraphic evolution of the Andean orogen in Chile, in: Geology of Chile, Chapter 3 (Moreno, T. & Gibbons, W., editors), The Geological Society, London, Special Publication, p. 21-116.

    Charrier, R., Hérail, G., Pinto, L., García, M., Riquelme, R., Farías, M. and Muñoz, N., 2013. Cenozoic tectonic evolution in the Central Andes in northern Chile and west-central Bolivia. Implications for paleogeographic, magmatic and mountain building evolution. International Journal of Earth Sciences, 102: 235-264. doi:10.1007/s00531-012-0801-4.

    Charrier, R., Ramos, V.A., Tapia, F. and Sagripanti, L., 2015. Tectonostratigraphic evolution of the Andean orogeny between 31º and 37ºS (Chile and Western Argentina). In: Sepúlveda, S. A., Giambiagi, L. B., Moreiras, S. M., Pinto, L., Tunik, M., Hoke, G. D. & Farías, M. (eds.) Geodynamic Processes in the Andes of Central Chile and Argentina. Geological Society, London, Special Publications, 399:13-61. doi 10.1144/SP399.20


    María Pía Rodríguez

    Geologist (2008) and PhD in Geology, Universidad de Chile (2013).  She is a professor at Universidad de Atacama specialized in Geomorphology, Geochronology of cosmogenic isotopes, thermochronology of fission traces and of (U-Th) / He in apatito, and Sedimentary provenance through heavy detrital minerals.

    Publications:

    Carretier, S., Regard, V., Vassallo, R., Aguilar, G., Martinod, J., Riquelme, R., Christophoul, F., Charrier, R., Gayer, E., Farías, M., Audin, L. and Lagane, C., 2015. Differences in 10Be concentrations between river sand, gravel and pebbles along the western side of the
    Central Andes. Quaternary Geochronology 27: 33-51.

    Rodríguez, M. P., Charrier, R., Brichau, S., Carretier, S., Farías, M., de Parseval, P., & Ketcham, R.A., 2018. Latitudinal and Longitudinal Patterns of Exhumation in the Andes of North-Central Chile. Tectonics, 37(9), 2863-2886. https://doi.org/10.1029/2018TC004997

    Carretier, S., Tolorza, V., Rodríguez, M. P., Pepin, E., Aguilar, G., Regard, V., Martinod, J., Riquelme, R., Bonnet, S., Brichau, S., Hérail, G., Pinto, L., Farías., M. and Charrier, R. 2015. Erosion in the Andes between 27° and 40°S: Tectonic, climatic or geomorphic control. In: Sepúlveda, S. A., Giambiagi, L. B., Moreiras, S. M., Pinto, L., Tunik, M., Hoke, G. D. & Farías, M. (eds) Geodynamic Processes in the Andes of Central Chile and Argentina. Geological Society, London, Special Publication 399: 401-418.

    Rodríguez, M.P., Aguilar, G., Urresty, C. & Charrier, R. 2014. Neogene landscape evolution in the Andes of north-central Chile between 28 and 32°S: interplay between tectonic and erosional processes. In: Sepúlveda, S. A., Giambiagi, L. B., Moreiras, S. M., Pinto, L., Tunik, M., Hoke, G. D. & Farías, M. (eds) Geodynamic Processes in the Andes of Central Chile and Argentina. Geological Society, London, Special Publication 399: 419-446.

    Rodríguez, M. P., Carretier, S., Charrier, R., Saillard, M., Regard, V., Hérail, G., Hall, S., Farber, D. and Audin, L., 2013. Geochronology of pediments and marine terraces in north-central Chile and their implications for Quaternary uplift in the Western Andes. Geomorphology, 180-181, 33-46.

    Rodríguez, M.P., Lincoñir, L.P., Encinas, A., 2012. Cenozoic erosion in the Andean forearc in Central Chile (33°–34°S): Sediment provenance inferred by heavy mineral studies. Geological Society of America Special Papers 487, 141–162.

    Charrier, R., Pinto, L. and Rodríguez, M.P., 2007. Tectono-stratigraphic evolution of the Andean orogen in Chile, In The Geology of Chile, Ed .Geological Society, London.

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