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Laboratorio de Paleomagnetismo

    Descripción

    En el Laboratorio de Paleomagnetismo y Tectónica se pueden caracterizar las propiedades y mineralogía magnética de las rocas: Estudiar el magnetismo remanente de las muestras y también determinar la fábrica magnética de éstas. Además contamos con un completo set de Pc y software que permite el modelamiento geológico estructural en 2, 3 y 4 dimensiones.

    Equipamiento e instrumentos

    Magnetómetros: El magnetómetro mide el campo magnético inducido por la muestra ubicada en su interior, la que gira rápidamente a velocidad constante dentro de un par de bobinas de Helmholtz.

    1. Magnetómetro de rotación JR5Agico (Advanced Geoscience Inst. Company)
    2. Magnetómetro de rotación Molspin.

    Desmagnetizadores

    1.) Horno (TD-48, ASC Scientific).
    2.) Desmagnetizador por campo magnético alternativo

    Minerales magnéticos y fábrica magnética:

    Los siguientes equipos permiten caracterizar los minerales magnéticos que portan la magnetización. También es posible determinar la fábrica magnética presente en la muestra (la orientación de los minerales magnéticos)

    1.) Susceptibilímetro Bartington (MS2)
    2.) Kappabridge de multifrecuencia para medir susceptibilidad magnética y anisotropía de susceptibilidad magntica de rocas.
    3.) Imantador de impulso (ASC scientific, modelo IM-10-30

    Académico responsable

    Proyectos asociados

    • SERNAGEOMIN (PLAN NACIONAL), 2011 – 2016, mapping project of northern Chile scale 1:100.000. PI.
    • CODELCO 2012 – 2013, División El Teniente Project, 3D Structural model of the northern pit in the El Teniente Mine. PI.
    • UNTEC-CODELCO 2011 – 2012, División El Teniente project, 3D structural study in the El Teniente porphiry cooper deposit. PI.
    • UNTEC-Cartográfica S.A. 2011–2011 (Pucobre – Explorator). Structural geology of the El Espino region in northern Chile. PI.
    • UNTEC-Yamana Gold 2010–2011. Structural geology of the El Peñon region, northern Chile. PI.
    • FONDECYT 1080468, 2008-2012, The anatomy, nature, ascent and emplacement of the Illapel Plutonic Complex, Coastal Range, Central Chile. Co-Research.
    • FONDECYT 1070964, 2007-2010. Shortening Estimations and Tectonic Modeling for the Paleogene “Incaic” Event in Northern Chile: Implications for the Origin of the Bolivian Orocline and the Uplift of the Central Andes. PI.
    • ANILLO PROJECT. 2006-2008, Research projects of investigation in Antartic Science. Geological connections between, west Antarctica and Patagonia since the late Paleozoic. Co-Research.
    • FONDECYT 1050750, 2005-2007. Paleogene Rotational vs Neogene Non Rotational Deformation in the Central Andes: A Paleomagnetic and structural Study. PI
    • FONDECYT 3030050, 2003-2005. A Tectonic Study About the origin of the Clockwise Rotations in Northern Chile and Implications for the origin of the Bolivian Orocline using a Combined Paleomagnetic and Structural Approach and Numerical and Analogical Modeling. PI.

    Publicaciones

    • 1. Rubilar, J.*, Becerra, J. *, Arriagada, C., Martínez, F., Contreras-Reyes, E., Maksymowicz, A., Rojas, L. Structure of the Cordillera de la Sal: A key tectonic element for the Oligocene-Neogene evolution of the Salar de Atacama basin, Central Andes, Northern Chile. Submitted to Tectonics

      2. Becerra, J. *, Arriagada, C., Contreras-Reyes, E., Bascuñan, S. *, De Pascale, G. P., Reichert, C., Díaz-Naveas, J. and Cornejo, N. (2016), Gravitational deformation and inherited structural control on slope morphology in the subduction zone of north-central Chile (~29-33°S). Basin Research. Accepted Manuscript. doi:10.1111/bre.12205

      3. Poblete, F. *, Roperch, P., Arriagada, C., Ruffet, G., Ramírez de Arellano, C., Hervé, F., Poujol, M. (2016) Late Cretaceous-early Eocene counterclockwise rotation of the Fueguian Andes and evolution of the Patagonia-Antarctic Peninsula system. Tectonophysics, 668–669, pp. 15-34.

      4. Martínez, F. *, Arriagada, C., Peña, M. *, Deckart, K., Charrier, R. (2016) Tectonic styles and crustal shortening of the Central Andes "Pampean" flat-slab segment in northern Chile (27-29°S). Tectonophysics, 667, pp. 144-162.

      5. Bascuñán, S. *, Arriagada, C., Le Roux, J., Deckart, K. (2016) Unraveling the Peruvian Phase of the Central Andes: Stratigraphy, sedimentology and geochronology of the Salar de Atacama Basin (22°30-23°S), northern Chile. Basin Research, 28 (3), pp. 365-392.

      6. Martínez, F. *, Arriagada, C., Valdivia, R. *, Deckart, K., Peña, M. *. (2015) Geometry and kinematics of the Andean thick-skinned thrust systems: Insights from the Chilean Frontal Cordillera (28°-28.5°S), Central Andes. Journal of South American Earth Sciences, 64, pp. 307-324.

      7. Folguera, A., Alvarado, P., Arriagada, C., Ramos, V.A. (2015) Tectonics of the Argentine and Chilean Andes: An introduction. Journal of South American Earth Sciences, 64, pp. 259-260.

      8. Narea, K. *, Peña, M. *, Bascuñán, S. *, Becerra, J. *, Gómez, I. *, Deckart, K., Munizaga, F., Maksaev, V., Arriagada, C., Roperch, P. (2015) Paleomagnetism of Permo-Triassic and Cretaceous rocks from the Antofagasta region, northern Chile. Journal of South American Earth Sciences, 64, pp. 261-272.

      9. Contreras-Reyes, E; Ruiz, JA; Becerra, J.*; Kopp, H; Reichert, C; Maksymowicz, A; Arriagada, C. (2015) Structure and tectonics of the central Chilean margin (31 degrees-33 degrees S): implications for subduction erosion and shallow crustal seismicity. Geophysical Journal International, 203/2, pp: 776-791.

      10. Ferrando, R. *, Roperch, P., Morata, D., Arriagada, C., Ruffet, G., Córdova, M.L. (2014) A paleomagnetic and magnetic fabric study of the Illapel Plutonic Complex, Coastal Range, central Chile: Implications for emplacement mechanism and regional tectonic evolution during the mid-Cretaceous. Journal of South American Earth Sciences, 50, pp. 12-26.

      11. Payacán, I.*, Gutiérrez, F., Gelman, S. E., Bachmann, O., & Parada, M. Á. (2014). Comparing magnetic and magmatic fabrics to constrain the magma flow record in La Gloria pluton, central Chile. Journal of Structural Geology, 69, 32-46.

      12. Poblete, F. *, Roperch, P., Hervé, F., Diraison, M., Espinoza, M., Arriagada, C. (2014) The curved Magallanes fold and thrust belt: Tectonic insights from a paleomagnetic and anisotropy of magnetic susceptibility study. Tectonics, 33 (12), pp. 2526-2551.

      13. Arriagada, C., Ferrando, R. *, Córdova, L. *, Morata, D., Roperch, P. (2013) The Maipo Orocline: A first scale structural feature in the miocene to recent geodynamic evolution in the Central Chilean Andes. Andean Geology, 40 (3), pp. 419-437.

      14. Álvarez, J. *, Mpodozis, C., Blanco-Quintero, I., García-Casco, A., Arriagada, C., Morata, D. (2013) U-Pb ages and metamorphic evolution of the La Pampa Gneisses: Implications for the evolution of the Chilenia Terrane and Permo-Triassic tectonics of north Central Chile. Journal of South American Earth Sciences, 47, pp. 100-115.

      15. Gutierrez, F., Payacan, I.*, Gelman, S. E., Bachmann, O., & Parada, M. A. (2013). Late‐stage magma flow in a shallow felsic reservoir: Merging the anisotropy of magnetic susceptibility record with numerical simulations in La Gloria Pluton, central Chile. Journal of Geophysical Research: Solid Earth,118(5), 1984-1998.

      16. Becerra, J. *, Contreras-Reyes, E., Arriagada, C. (2013) Seismic structure and tectonics of the southern Arauco Basin, south-central Chile (~38°S). Tectonophysics, 592, pp. 53-66.

      17. Martínez, F. *, Arriagada, C., Peña, M. *, Del Real, I. *, Deckart, K. (2013) The structure of the Chañarcillo Basin: An example of tectonic inversion in the Atacama region, northern Chile. Journal of South American Earth Sciences, 42, pp. 1-16.

      18. Martínez, F. *, Arriagada, C., Mpodozis, C., Peña, M*. (2012) The Lautaro Basin: A record of inversion tectonics in northern Chile. Andean Geology, 39 (2), pp. 258-278.

      19. González, D. *, Pinto, L., Peña, M. *, Arriagada, C. (2012) 3D deformation in strike-slip systems: Analogue modelling and numerical restoration. Andean Geology, 39 (2), pp. 295-316.

      20. Álvarez, J. *, Mpodozis, C., Arriagada, C., Astini, R., Morata, D., Salazar, E., Valencia, V.A., Vervoort, J.D. (2011) Detrital zircons from late Paleozoic accretionary complexes in north-central Chile (28°-32°S): Possible fingerprints of the Chilenia terrane. Journal of South American Earth Sciences, 32 (4), pp. 460-476.

      21. Creixell, C., Parada, M.Á., Morata, D., Vásquez, P., de Arce, C.P., Arriagada, C. (2011) Middle-Late Jurassic to early Cretaceous transtension and transpression during arc building in central Chile: Evidence from mafic dike swarms. Andean Geology, 38 (1), pp. 37-63.

      22. Arriagada, C., Arancibia, G., Cembrano, J., Martínez, F., Carrizo, D., Van Sint Jan, M., Sáez, E., González, G., Rebolledo, S., Sepúlveda, S.A., Contreras-Reyes, E., Jensen, E., Yañez, G. (2011) Nature and tectonic significance of co-seismic structures associated with the Mw 8.8 Maule earthquake, central-southern Chile forearc. Journal of Structural Geology, 33 (5), pp. 891-897.

      23. Poblete, F. *, Arriagada, C., Roperch, P., Astudillo, N., Hervé, F., Kraus, S., Le Roux, J.P. (2011) Paleomagnetism and tectonics of the South Shetland Islands and the northern Antarctic Peninsula. Earth and Planetary Science Letters, 302 (3-4), pp. 299-313.

      24. Kraus, S., Poblete, F. *, Arriagada, C. (2010) Dike systems and their volcanic host rocks on King George Island, Antarctica: Implications on the geodynamic history based on a multidisciplinary approach. Tectonophysics, 495 (3-4), pp. 269-297.

      25. Arriagada, C., Martínez, F, *. (2010) Effects of the 27 February Chile Earthquake. Journal of Structural Geology, 32 (4), p. 393.

      26. Astudillo, N., Roperch, P., Townley, B., Arriagada, C., Chauvin, A. (2010) Magnetic polarity zonation within the El Teniente copper-molybdenum porphyry deposit, central Chile. Mineralium Deposita, 45 (1), pp. 23-41.

      27. Creixell, C., Parada, M.Á., Morata, D., Roperch, P., Arriagada, C. (2009) The genetic relationship between mafic dike swarms and plutonic reservoirs in the mesozoic of central chile (30°-33°45′S): Insights from AMS and geochemistry. International Journal of Earth Sciences, 98 (1), pp. 177-201.

      28. Arriagada, C., Roperch, P., Mpodozis, C., Cobbold, P.R. (2008) Paleogene building of the Bolivian Orocline: Tectonic restoration of the central Andes in 2-D map view. Tectonics, 27 (6), TC6014.

      29. Astudillo, N., Roperch, P., Townley, B., Arriagada, C., Maksaev, V. (2008) Importance of small-block rotations in damage zones along transcurrent faults. Evidence from the Chuquicamata open pit, Northern Chile. Tectonophysics, 450 (1-4), pp. 1-20.

      30. Townley, B., Roperch, P., Oliveros, V., Tassara, A., Arriagada, C. (2007) Hydrothermal alteration and magnetic properties of rocks in the Carolina de Michilla stratabound copper district, northern Chile. Mineralium Deposita, 42 (7), pp. 771-789.

      31. Creixell, C., Parada, M.Á., Roperch, P., Morata, D., Arriagada, C., de Arce, C.P. (2006) Syntectonic emplacement of the Middle Jurassic Concón Mafic Dike Swarm, Coastal Range, central Chile (33° S). Tectonophysics, 425 (1-4), pp. 101-122.

      32. Arriagada, C., Roperch, P., Mpodozis, C., Fernandez, R. (2006) Paleomagnetism and tectonics of the southern Atacama Desert (25-28°S), northern Chile. Tectonics, 25 (4), TC4001.

      33. Roperch, P., Sempere, T., Macedo, O., Arriagada, C., Fornari, M., Tapia, C., García, M., Laj, C. (2006) Counterclockwise rotation of late Eocene-Oligocene fore-arc deposits in southern Peru and its significance for oroclinal bending in the central Andes. Tectonics, 25 (3), TC3010.

      34. Arriagada, C., Cobbold, P.R., Roperch, P. (2006) Salar de Atacama basin: A record of compressional tectonics in the central Andes since the mid-Cretaceous. Tectonics, 25 (1), TC1008.

      35. Mpodozis, C., Arriagada, C., Basso, M., Roperch, P., Cobbold, P., Reich, M. (2005) Late Mesozoic to Paleogene stratigraphy of the Salar de Atacama Basin, Antofagasta, Northern Chile: Implications for the tectonic evolution of the Central Andes. Tectonophysics, 399 (1-4), pp. 125-154.

      36. Arriagada, C., P. Roperch, C. Mpodozis, G. Dupont-Nivet, P. R. Cobbold, A. Chauvin, and J. Cortés (2003), Paleogene clockwise tectonic rotations in the forearc of central Andes, Antofagasta region, northern Chile, Journal of Geophysical Research, 108, 2032, doi:10.1029/2001JB001598, B1.

      37. Arriagada, C., Roperch, P., Mpodozis, C. (2000) Clockwise block rotations along the eastern border Cordillera de Domeyko, Northern Chile (22° 45'-30'S). Tectonophysics, 326 (1-2), pp. 153-171.

      (*) Universidad de Chile students

     

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