Abstract
After a Late Cretaceous to Paleocene stage of mountain building, the North Patagonian Andes were extensionally reactivated leading to a period of crustal attenuation. The result was the marine Traiguén Basin characterized by submarine volcanism and deep-marine sedimentation over a quasi-oceanic basement floor that spread between 27 and 22 Ma and closed by 20 Ma, age of syndeformational granitoids that cut the basin infill. As a result of basin closure, accretion of the Upper Triassic metamorphic Chonos Archipelago took place against the Chilean margin, overthrusting a stripe of high-density (mafic) rocks on the upper crust, traced by gravity data through the Chonos Archipiélago. After this, contractional deformation had a rapid propagation between 19 and 14.8 Ma rebuilding the Patagonian Andes and producing a wide broken foreland zone. This rapid advance of the deformational front, registered in synorogenic sedimentation, was accompanied at the latitudes of the North Patagonian Andes by an expansion of the arc magmatism between 19 and 14 Ma, suggesting a change in the subduction geometry at that time. Then a sudden retraction of the contractional activity took place around 13.5–11.3 Ma, accompanied by a retraction of magmatism and an extensional reactivation of the Andean zone that controlled retroarc volcanism up to 7.3–(4.6?) Ma. This particular evolution is explained by a shallow subduction regime in the northernmost Patagonian Andes, probably facilitated by the presence of the North Patagonian massif lithospheric anchor that would have blocked drag basal forces creating low-pressure conditions for slab shallowing. Contrastingly, to the south, the accretion of the Chonos Archipelago explains rapid propagation of the deformation across the retroarc zone. These processes occurred at the time of rather orthogonal to the margin convergence between Nazca and South American plates after a long period of high oblique convergence. Finally, convergence deceleration in the last 10 My could have led to extensional relaxation of the orogen.
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References
Alvarez O, Gimenez ME, Braitenberg C, Folguera A (2012) GOCE satellite derived gravity and gravity gradient corrected for topographic Effect in the South Central Andes region. Geophys J Int 190:941–959. https://doi.org/10.1111/j.1365-246X.2012.05556.x
Alvarez O, Gimenez ME, Braitenberg C (2013) Nueva metodología para el cálculo del efecto topográfico para la corrección de datos satelitales. Rev Asoc Geol Argent 70:422–429
Amante C, Eakins BW (2009) ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24. National Geophysical Data Center. Biblioteca Digital ILCE 1, p 19
Aragón E, Castro A, Díaz-Alvarado J, Liu DY (2011) The North Patagonian batholith at Paso Puyehue (Argentina-Chile). SHRIMP ages and compositional features. J South Am Earth Sci 32:547–554
Bechis F, Encinas A, Concheyro A, Litvak V, Aguirre-Urreta B, Ramos VA (2014) New age constraints for the Cenozoic marine transgressions of northwestern Patagonia, Argentina (41°–43° S): Paleogeographic and tectonic implications. J South Am Earth Sci 52:72–93
Bilmes A, D’Elia L, Franzese J, Veiga G, Hernández M (2013) Miocene block uplift and basin formation in the Patagonian foreland: The Gastre Basin, Argentina. Tectonophysics 601:98–111
Bissig T, Clark AH, Lee JKW, von Quadt, (2003) Petrogenetic and metallogenetic responses to miocene slab flattenig: New constrains from the El Indio-Pascua Au-Ag-Cu Belt, Chile/Argentina. Mineralium Deposita 38: 844–862
Cande SC, Leslie RB (1986) Late Cenozoic tectonics of the Southern Chile Trench. J Geophys Res 91:471–496
Bouman J, Ebbing J, Fuchs M (2013) Reference frame transformation of satellite gravity gradients and topographic mass reduction. J Geophys Res: Solid Earth 118:759–774. https://doi.org/10.1029/2012JB009747
Braitenberg C, Ebbing J, Gotze H (2002) Inverse modelling of elastic thickness by convolution method the Eastern Alps as a case example. Earth Planet Sci Lett 202:387–404
Braitenberg C, Mariani P, Ebbing J, Sprlak M (2011) The enigmatic Chad lineament revisited with global gravity and gravity gradient fields. In: van Hinsbergen DJJ, Buiter S, Torsvik TH, Gaina C, Webb S (eds) The Formation and Evolution of Africa: A Synopsis of 3.8 Ga of Earth History. Geological Society of London 357, London, pp 329–343
Cembrano J, Hervé F, Lavenu A (1996) The Liquiñe Ofqui fault zone: a long-lived intra-arc fault system in southern Chile. Tectonophysics 259:55–66
Echaurren A, Folguera A, Gianni G, Orts D, Tassara A, Encinas A, Giménez M, Valencia V (2016) Tectonic evolution of the North Patagonian Andes (41°–44° S) through recognition of syntectonic strata. Tectonophysics 677:99–114. https://doi.org/10.1016/j.tecto.2016.04.009
Encinas A, Folguera A, Oliveros V, del Mauro L, Tapia F, Riffo R, Hervé F, Finger K, Valencia V, Gianni G, Álvarez O (2015) Late Oligocene-Early Miocene submarine volcanism and deep-marine sedimentation in an extensional basin of southern Chile. Implications on the tectonic development of the North Patagonian Andes. Geol Soc Am Bulletin 128:807–823
Espinoza F, Morata D, Polve M, Lagabrielle Y, Maury R, De la Rupelle A, Guivel C, Cotten J, Bellon H, Suarez M (2010) Volcanismo calcoalcalino durante el Mioceno Medio en Patogonia Central (47° S): petrogenesis e implicaciones en la dinamica de placas. Andean Geol 37:300–328
Feruglio E (1947) Descripción Geológica de la Hoja 40b, San Carlos de Bariloche, Río Negro, Carta Geológico-Económica de la República Argentina, escala 1:200,000. Dirección Nacional de Geología y Minería, Buenos Aires, Argentina
Flynn J, Novacek M, Dodson H, Frassinetti D, Mc Kenna M, Norell M, Sears K, Swisher C, Wuss A (2002) A new fossil mammal assemblage from the southern Chilean Andes: implications for geology, geochronology, and tectonics. J South Am Earth Sci 15:285–302
García-Sansegundo J, Farias P, Gallastegui G, Giacosa RE, Heredia N (2009) Structure and metamorphism of the Gondwanan basement in the Bariloche region (North Patagonian Argentine Andes). Int J Earth Sci 98:1599–1608
Giacosa R, Heredia N (2004) Structure of the North Patagonian thick-skinned fold-and-thrust belt, southern central Andes, Argentina (41°–42° S). J South Am Earth Sci 18:61–72
Gianni G, Navarrete C, Orts D, Tobal J, Folguera A, Giménez M (2015a) Patagonian broken foreland and related impactogene: The origin of the Chubut Basin. Tectonophysics 649:81–99
Gianni G, Folguera A, Navarrete C, Encinas A, Echaurren A (2015b) The North Patagonian orogen: Meso-Cenozoic evolution from the Andes to the foreland area. In: Folguera A, Naipauer M, Sagripanti L, Ghiglione M, Orts D, Giambiagi L (eds) Growth of the Southern Andes. Springer International Publishing, pp 173–200
Gordon A, Ort MH (1993) Edad y correlación del plutonismo subcordillerano en la provincias de Río Negro y Chubut (41°–42°30′ L.S.). In: Ramos VA (ed) Geología y Recursos Naturales de la Provincia de Mendoza. Mendoza, Relatorio del XII Congreso Geológico Argentino, pp 120–127
Grombein T, Heck B, Seitz K (2013) Optimized formulas for the gravitational field of a tesseroid. J Geod 87:645–600
Gutscher M-A, Spakman W, Bijwaard H, Engdahl ER (2000) Geodynamics of flat subduction: Seismicity and tomographic constraints from the Andean margin. Tectonics 19. https://doi.org/10.1029/1999TC001152
Haller M, Pécskay Z, Németh K, Gméling K, Massaferro GI, Meister CM, Nullo FE (2009) Preliminary K-Ar geochronology of Neogene back arc volcanism in Northern Patagonia, Argentina. III International Maar Conference. IAVCEI, Malargüe, pp 40–41
Hervé F (1998) Late Triassic rocks in the subduction complex of Aysén, southern Chile. Event Stratigraphy of Gondwana: J Afr Earth Sci 10:224
Hervé F, Fanning CM (2001) Late Triassic detrital zircons in meta-turbidites of the Chonos Metamorphic Complex, southern Chile. Rev Geol Chile 28:91–104
Hervé F, Pankhurst RJ, Drake R, Beck ME (1995) Pillow metabasalts in a mid-Tertiary extensional basin adjacent to the Liquiñe-Ofqui fault zone: the Isla Magdalena area, Aysén, Chile. J South Am Earth Sci 8:33–46
Hervé F, Sanhueza A, Silva C, Pankhurst RJ, Fanning MC, Campbell H, Crundwell M (2001) A Neogene age for Traiguén Formation, Aysén, Chile, as revealed by shrimp U-Pb dating of detrital zircons. In: III Simposio Sudamericano de Geología Isotópica, Pucón, pp 570–574
James D, Sacks IE (1999) Cenozoic formation of the Central Andes: a geophysical perspective. In: Skinner BJ (ed) Geology and Ore Deposits of the Central Andes. Soc Econ Geol: 1–26
Janak J, Sprlak M (2006) New Software for Gravity Field Modelling Using Spherical Armonic. Geodetic and Cartographic Horizon 52:1–8
Jordan T, Burns W, Veiga R, Pángaro F, Copeland P, Kelley S, Mpodozis C (2001) Extension and basin formation in the Southern Andes caused by increased convergence rate: Amid-Cenozoic trigger for the Andes. Tectonics 20:308–324
Kay SM, Coira BL (2009) Shallowing and steepening subduction zones, continental lithospheric loss, magmatism, and crustal flow under the Central Andean Altiplano-Puna Plateau. In: Kay SM, Ramos VA, Dickinson WR (eds) Backbone of the Americas: Shallow Subduction, Plateau Uplift, and Ridge and Terrane Collision. Geol Soc Am Memoirs 204, Boulder, pp 229–259
Kay SM, Maksaev VA, Moscoso R, Mpodozis C, Nasi C (1987) Probing the evolving Andean lithosphere: Mid-Late Tertiary Magmatism in Chile (29°–30°30´) over the modern zone of subhorizontal subduction. J Geophys Res 92:6173–6189
Kay SM, Mpodozis C, Ramos VA, Munizaga F (1991) Magma source variations for mid late Tertiary magmatic rocks associated with shallowing zone and thickening crust in the central Andes (28° to 33° S). In: Harmon RS, Rapela CW (eds) Andean magmatism and its tectonic setting. Geological Society of America, Special Paper 265: 113–137
Kay SM, Mpodozis C, Coira B (1999) Neogene magmatism, tectonism and mineral deposits of the Central Andes (22º–23º S Latitude). In: Skinner BJ (ed) Geology and Ore Deposits of the Central Andes. Society of Economic Geologists, Special Publication 7, pp 27–59
Kay SM, Burns M, Copeland P (2006) Upper Cretaceous to Holocene Magmatism over the Neuquén basin: Evidence for transient shallowing of the subduction zone under the Neuquén Andes (36° S to 38° S latitude). In: Kay SM, Ramos VA (eds) Late Cretaceous to Recent magmatism and tectonism of the Southern Andean margin at the latitude of the Neuquen basin (36–39º S). Geological Society of America, Special Paper 407, pp 19–60
Kay SM, Ardolino AA, Gorring ML, Ramos VA (2007) The Somuncura Large Igneous Province in Patagonia: Interaction of transcient mantle thermal anomaly with a subduction slab. J Petrol 48:43–77
Lange D, Rietbrock A, Haberland C, Bataille K, Dahm T, Tilmann F, Flüh ER (2007) Seismicity and geometry of the south Chilean subduction zone (41.5° S–43.5° S): Implications for controlling parameters. Geophys Res Lett 34:L06311. https://doi.org/10.1029/2006GL029190
Lara L, Rodriguez C, Moreno H, Pérez de Arce C (2001) Geocronología K-Ar y geoquímica del volcanismo plioceno superior-pleistoceno de los Andes del sur (39–42° S). Rev Geol Chile 28:67–90
Lavenu A, Cembrano J (1999) Compressional- and transpressional-stress pattern for Pliocene and Quaternary brittle deformation in fore arc and intra-arc zones (Andes of Central and Southern Chile). J Struct Geol 21:1669–1691
Li X (2001) Vertical resolution: gravity versus vertical gravity gradient. Lead Edge 20:901–904
Litvak VD, Poma S, Kay SM (2007) Paleogene and Neogene magmatism in the Valle del Cura region: a new perspective on the evolution of the Pampean flat slab, San Juan province, Argentina. J South Am Earth Sci 24:117–137
Litvak VD, Spagnuolo MG, Folguera A, Poma S, Jones R, Ramos VA (2015) Late Cenozoic calc-alkaline volcanism over the Payenia shallow subduction zone, South-Central Andean back-arc (34°30–3’7S), Argentina. J South Am Earth Sci 64:365–380
Manea VC, Pérez-Gussinyé M, Manea M (2012) Chilean flat slab subduction controlled by overriding plate thickness and trench rollback. Geology 40:35–38. https://doi.org/10.1130/G32543.1
Marshall L, Salinas P (1990) Stratigraphy of the Río Frías Formation (Miocene), along the Alto Río Cisnes, Aisén, Chile. Rev Geol Chile 17:57–87
Marshall LG, Pascual R, Curtis GH, Drake RE (1977) South american geochronology: radiometric time scale for middle to late tertiary mammal-bearing horizons in patagonia. Science 195:1325–8. https://doi.org/10.1126/science.195.4284.1325
Massaferro G, Haller M, D’Orazio M, Alric V (2006) Sub-recent volcanism in Northern Patagonia: A tectonomagmatic approach. J Volcanol Geoth Res 155:227–243
Maus S, Sazonova T, Hemant K, Fairhead JD, Ravat D (2007) Na-tional Geophysical Data Center candidate for the World Digital Magnetic Anomaly Map. Geochem Geophys Geosyst 8:Q06017. https://doi.org/10.1029/2007GC001643
Mazzoni M, Benvenuto A (1990) Radiometric ages of Tertiary ignimbrites and the Collón Curá Formation northwestern Patagonia. In: XI Congreso Geológico Argentino, San Juan, pp 87–90
Mena M, Ré GH, Haller MJ, Singer SE, Vilas JF (2006) Paleomagnetism of the late Cenozoic basalts from northern Patagonia. Earth Planets Sp 58:1273–1281
Müller RD, Sdrolias M, Gaina C, Roest WR (2008) Age, spreading rates, and spreading asymmetry of the world’s ocean crust. Geochem Geophys Geosyst 9:1–19. https://doi.org/10.1029/2007GC001743
Muñoz J, Troncoso R, Duhart P, Crignola P, Farmer L, Stern CR (2000) The relation of the mid-Tertiary coastal magmatic belt in south-central Chile to the late Oligocene increase in plate convergence rate. Rev Geol Chile 27:177–203
Orts D, Folguera A, Encinas A, Ramos M, Tobal J, Ramos VA (2012) Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30′–43° S). Tectonics 31: TC3012. https://doi.org/10.1029/2011TC003084
Orts D, Folguera A, Gimenez M, Ruiz F, Rojas Vera E, Lince Klinger F (2015) Cenozoic building and deformational processes in the North Patagonian Andes. J Geodyn 86:26–41
O’Driscoll LJ, Richards MA, Humphreys ED (2012) Nazca-South America interactions and the late Eocene-late Oligocene flat-slab episode in the central Andes. Tectonics 31:TC2013. https://doi.org/10.1029/2011TC003036
Pankhurst RJ, Weaver SD, Hervé F, Larrondo P (1999) Mesozoic-Cenozoic evolution of the North Patagonian Batholith in Aysen, southern Chile. J Geol Soc London 156:673–694
Pardo-Casas F, Molnar P (1987) Relative motion of the Nazca (Farallón) and South American plates since Late Cretaceous time. Tectonics 6:233–248
Pavlis NK, Holmes SA, Kenyon SC, Factor JK (2008) An Earth Gravitational Model to Degree 2160: EGM2008. EGU General Assembly, Vienna, pp 13–18
Pavlis NK, Holmes SA, Kenyon SC, Factor JK (2012) The development and evaluation of the Earth Gravitational Model 2008 (EGM2008). J Geophys Res 117:B04406. https://doi.org/10.1029/2011JB008916
Pécskay Z, Haller M, Németh K (2007) Preliminary K/Ar geochronology of the Crater Basalt volcanic field (CBVF), northern Patagonia. Rev Asoc Geol Argent 62:25–29
Peroni GO, Hegedus AG, Cerdan J, Legarreta L, Uliana MA, Laffite G (1995) Hydrocarbon Accumulation in an Inverted Segment of the Andean Foreland: San Bernardo Belt, Central Patagonia. In: Tankard AJ, Suárez R, Welsink HJ (eds) Petroleum Basins of South America. Am Assoc Petrol Geol Memoir 62, pp 403–419
Ramírez de Arellano C, Putlitz B, Müntener O, Ovtcharova M (2012) High precision U/Pb zircon dating of the Chaltén Plutonic Complex (Cerro Fitz Roy, Patagonia) and its relationship to arc migration in the southernmost Andes. Tectonics 31: TC4009. https://doi.org/10.1029/2011TC003048
Ramos VA (1981). Descripción geológica de la hoja 47ab, Lago Fontana: provincia del Chubut. Buenos Aires
Ramos VA, Kay SM (1992) Southern Patagonian plateau basalts and deformation: Backarc testimony of ridge collisions. Tectonophysics 205:261–282. https://doi.org/10.1016/0040-1951(92)90430-E
Ramos M, Orts D, Calatayud F, Pazos P, Folguera A, Ramos VA (2011) Estructura, estratigrafía y evolución tectónica de la cuenca de Ñirihuao en las nacientes del río Cuyamen (Chubut, Argentina). Rev Asoc Geol Argent 68:210–224
Ramos M, Tobal J, Sagripanti L, Folguera A, Orts D, Giménez M, Ramos V (2015) The North Patagonian orogenic front and foreland evolution: Ñirihuau-Ñorquinco Depocenter (~42º S). J South Am Earth Sci 64:467–485
Rapela C, Kay S (1988) Late Paleozoic to Recent magmatic evolution of northern Patagonia. Episodes 11:175–182
Rapela C, Munizaga F, Dalla Salda L, Hervé F, Parada M, Cingolani C (1987) Nuevas edades potasio-argón de los granitoides del sector nororiental de los Andes Patagónicos. X Congreso Geológico Argentino, Tucumán, Actas 1:18–20
Rapela C, Spalletti L, Merodio JC, Aragón E (1988) Temporal evolution and spatial variation of early tertiary volcanism in the Patagonian Andes (40° S–42°30′S). J South Am Earth Sci 1:75–88. https://doi.org/10.1016/0895-9811(88)90017-X
Rapela CW, Pankhurst RJ, Fanning CM, Herve F (2005) Pacific subduction coeval with the Karoo mantle plume: the Early Jurasssic Subcordilleran belt of northwestern Patagonia. Geological Society of London, Special Publication 246:217–239. https://doi.org/10.1144/GSL.SP.2005.246.01.07
Rojas Vera EA, Folguera A, Valcarce GZ, Giménez M, Ruiz F, Martínez P, Bottesi G, Ramos V (2010) Neogene to Quaternary extensional reactivation of a fold and thrust belt: The Agrio belt in the Southern Central Andes and its relation to the Loncopué trough (38°–39° S). Tectonophysics 492:279–294
Silver PG, Russo RM, Lithgow-Bertelloni C (1998) Coupling of South American and African Plate Motion and Plate Deformation. Science 279:60–63. https://doi.org/10.1126/science.279.5347.60
Somoza R, Ghidella ME (2005) Convergencia en el margen occidental de América del sur durante el Cenozoico: Subducción de las placas de Nazca, Farallón y Aluk. Rev la Asoc Geol Argent 60:797–809
Suárez M, De La Cruz R (2001) Jurassic to Miocene K-Ar dates from eastern central Patagonian Cordillera plutons, Chile (45°–48° S). Geol Mag 138:53–66
Suárez M, De La Cruz R, Bell CM (1996). Estratigrafía de la región de Coyhaique (Latitud 45o-46oS), Cordillera Patagónica, Chile. In: XIII Congreso Geológico Argentino and III Congreso de Exploración de Hidrocarburos, Capital Federal, pp 575–590
Tašárová ZA (2007) Towards understanding the lithospheric structure of the southern Chilean subduction zone (36° S-42° S) and its role in the gravity field. Geophys J Int 170:995–1014. https://doi.org/10.1111/j.1365-246X.2007.03466.x
Thomson S (2002) Late Cenozoic geomorphic and tectonic evolution of the Patagonian Andes between latitudes 42° S and 46° S: An appraisal based on fission-track results from the transpressional intra-arc Liquiñe-Ofqui fault zone. Geol Soc Am Bulletin 114:1159–1173
Tobal J, Folguera A, Naipauer M, Sellés D, Likerman J, Boedo F, Gimenez M, Ramos VA (2015) Late Miocene extensional relaxation of the North Patagonian Andes (41°30´–42° S). Tectonophysics. https://doi.org/10.1016/j.tecto.2015.06.032
Uieda L, Ussami N, Braitenberg CF (2010) Computation of the gravity gradient tensor due to topographic masses using tesseroids. In: Eos Transactions AGU, 91, Meeting of the Americas supplement, Abstract G22A–04
Utgé S, Folguera A, Litvak VD, Ramos VA (2009) Geología del sector norte de la Cuenca de Cura Mallín: Zona de las lagunas de Epulaufquen (36°40’–50’S, 71°–71°10’W). Rev Asoc Geol Argent 64:230–247
Vicente JC (2005) Dynamic paleogeography of the Jurassic Andean Basin: pattern of transgression and localisation of main straits through the magmatic arc. Rev Asoc Geol Argent 60:221–250
Von Gosen W (2009) Stages of Late Palaeozoic deformation and intrusive activity in the western part of the North Patagonian Massif (southern Argentina) and their geotectonic implications. Geol Mag 146:48–71. https://doi.org/10.1017/S0016756808005311
Von Gosen W, Loske W (2004) Tectonic history of the Calcatapul Formation, Chubut province, Argentina, and the “Gastre fault system”. J South Am Earth Sci 18:73–88
Wienecke S (2006). A new analytical solution for the calculation of flexural rigidity: significance and applications. PhD thesis, Freie Universität Berlin
Wienecke S, Braitenberg C, Goetze H (2007) A new analytical solution estimating the flexural rigidity in the Central Andes. Geophys J Int 169:789–794
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Folguera, A. et al. (2018). Neogene Growth of the Patagonian Andes. In: Folguera, A., et al. The Evolution of the Chilean-Argentinean Andes. Springer Earth System Sciences. Springer, Cham. https://doi.org/10.1007/978-3-319-67774-3_19
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