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Distribution of Triassic and Jurassic intrusive rocks in the Cordillera de la Costa, 34°–37°S. The geologic units are outlined after Dávila et al. (1979), Escobar et al. (1977), Godoy (1970), Gajardo (1981), Gana and Hervé (1983), Hervé and Munizaga (1978), Vásquez et al. (2005), Vásquez and Franz (2008), and this study. The published ages are from (1) Dávila et al. (1979), (2) Hervé et al. (1984), (3) Gana and Hervé (1983), (4) Willner et al. (2005) (5), Hervé and Munizaga (1978), (6) Vásquez et al. (2005), (7) Hervé et al. (1988), and (8) Lucassen et al. (2004). Amph = amphibole; Bt = biotite; WR = whole rock; Zrn = zircon. Triassic-Jurassic basin distribution after Escobar et al. (1977). Outcrops of the Southern Coastal Batholith after SERNAGEOMIN (2003).

Distribution of Triassic and Jurassic intrusive rocks in the Cordillera de ...

Published: 01 March 2011
Figure 2. Distribution of Triassic and Jurassic intrusive rocks in the Cordillera de la Costa, 34°–37°S. The geologic units are outlined after Dávila et al. ( 1979 ), Escobar et al. ( 1977 ), Godoy ( 1970 ), Gajardo ( 1981 ), Gana and Hervé ( 1983 ), Hervé and Munizaga ( 1978 ), Vásquez et al
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FIGURE 4—Schematic diagram showing different stages of tectonic evolution in the area of interest. (A) Early development of the Rocas Verdes basin and deposition of the Tobifera formation. (B) Later stage of the Rocas Verdes with deposition of the Zapata formation in the paleogeographic setting in which the Torres del Paine Ichthyosaur lived. (C) Closure of the basin and formation of the modern Andean Cordillera. Modified after Herve, et al. (2000)

FIGURE 4 —Schematic diagram showing different stages of tectonic evolution ...

Published: 01 February 2003
in which the Torres del Paine Ichthyosaur lived. (C) Closure of the basin and formation of the modern Andean Cordillera. Modified after Herve, et al. (2000)
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Regional map of the South Patagonian Andes showing the location of sites with metamorphic constraints. The inset plots P–T estimates for the northeastern belt of the Eastern Andean Metamorphic Complex (Hervé et al. 1999; Ramírez-Sánchez et al. 2005) and also includes a fossil accretionary prism (Willner et al. 2004) and back-arc basin closure (Muller et al. 2021) as a reference, both from southern Patagonia.

Regional map of the South Patagonian Andes showing the location of sites wi...

Published: 17 May 2024
Fig. 8. Regional map of the South Patagonian Andes showing the location of sites with metamorphic constraints. The inset plots P – T estimates for the northeastern belt of the Eastern Andean Metamorphic Complex ( Hervé et al. 1999 ; Ramírez-Sánchez et al. 2005 ) and also includes a fossil
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Age vs εHf plots. (a) Diagram showing all the data from the literature and this study. This includes all data available for the region from the Antarctic Peninsula to northern Chile. DZ: Detrital zircon. Data for the Neuquén Basin are from Tunik et al. (2010), Balgord (2017) and Naipauer et al. (2018). Data for the Cañadón Asfalto Basin from Hauser et al. (2017). Data for the Chilean Coastal Batholith from Deckart et al. (2014). Data for the Magmatic Intracratonic Corridor from Castillo et al. (2017) and Chernicoff et al. (2019); for Puna Salta from Poma et al. (2014); and for the Collahuasi Area from Munizaga et al. (2008). Data for the Chilean Frontal Andes are from Hervé et al. (2014) and Del Rey et al. (2016), and for the Principal Cordillera from Jones et al. (2015). Data for Patagonia are from Pepper et al. (2016); for the Antarctic Peninsula from Fanning et al. (2011) and Castillo et al. (2016). Data for the Accretionary Complex of Central Chile from Hervé et al. (2013). Data for South Patagonia from Fanning et al. (2011) and Castillo et al. (2016). Data for North Patagonia from Fanning et al. (2011), Chernicoff et al. (2013), Pankhurst et al. (2014), Castillo et al. (2017), and this study. Data for the Paraná Basin are from Canile et al. (2016), and for the Cordillera del Viento from Hervé et al. (2013). (b) Plot showing the age vs εHf evolution for the NAT, CAT and SAT regions from 265 Ma onward. The crustal evolution trends represent the bulk-rock trends for Mesoproterozoic juvenile crust, calculated using the 176Lu/177Hf ratio of 0.0113 (Taylor & McLennan, 1985; Wedepohl, 1995). Pre-ChMP: previous magmatism in the Choiyoi Magmatic Province; L-ChMP: Lower Choiyoi Magmatic Province; U-ChMP: Upper Choiyoi Magmatic Province; SRCP: San Rafael Compressional Phase; HEP: Huárpica Extensional Phase.

Age vs ε Hf plots. (a) Diagram showing all the data from the literature ...

Published: 29 June 2022
), Chernicoff et al. ( 2013 ), Pankhurst et al. ( 2014 ), Castillo et al. ( 2017 ), and this study. Data for the Paraná Basin are from Canile et al. ( 2016 ), and for the Cordillera del Viento from Hervé et al. ( 2013 ). (b) Plot showing the age vs ε Hf evolution for the N AT , C AT and S
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Summary of geochronological and isotopic data from the Patagonian Andes. (A) Detrital zircon εHf(t) from samples from this study (black) and a previous study (orange; Pepper et al., 2016) and igneous whole rock εNd(t) from samples from the Southern Patagonian Batholith (red; Martin et al., 2001; Hervé et al., 2007; Dobbs et al., 2022) and the modern volcanic arc (purple; Stern and Kilian, 1996) versus age. Abbreviations: DM—depleted mantle; CHUR—chondritic uniform reservoir (Vervoort and Blichert-Toft, 1999; Bouvier et al., 2008); RVB—Rocas Verdes Basin. (B) Distance of arc samples from modern trench versus age (Halpern, 1973; Weaver et al., 1990; Bruce et al., 1991; Martin et al., 2001; Hervé et al., 2007). Plots A and B show moving averages (window size = 20; orange line), two standard deviations (red shaded area), and error bars (2σ). (C) Comparison of detrital and igneous zircon age distributions shown as a kernel density estimate plot (bandwidth = 5 m.y.).

Summary of geochronological and isotopic data from the Patagonian Andes. (A...

Published: 28 February 2024
; Martin et al., 2001 ; Hervé et al., 2007 ; Dobbs et al., 2022 ) and the modern volcanic arc (purple; Stern and Kilian, 1996 ) versus age. Abbreviations: DM—depleted mantle; CHUR—chondritic uniform reservoir ( Vervoort and Blichert-Toft, 1999 ; Bouvier et al., 2008 ); RVB—Rocas Verdes Basin. (B
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(A–F) Simplified paleogeographic maps showing the geologic history of the Magallanes-Austral Basin that emphasize the deposition or emplacement of Magallanes-Austral Basin source rocks and their distribution through time, modified from Blakey (2008), Fanning et al. (2011), Hervé et al. (2010), Castillo et al. (2016), and Poblete et al. (2016). EAMC—Eastern Andean Metamorphic Complex; DYC—Duque du York; SA—South America; AF—Africa; AN—Antarctica; WP—Antarctic western peninsula.

(A–F) Simplified paleogeographic maps showing the geologic history of the M...

Published: 12 July 2019
Figure 3. (A–F) Simplified paleogeographic maps showing the geologic history of the Magallanes-Austral Basin that emphasize the deposition or emplacement of Magallanes-Austral Basin source rocks and their distribution through time, modified from Blakey (2008) , Fanning et al. (2011) , Hervé et
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a, Distribution of different crustal segments in the Central Andes. The limit between the pre-Ordovician–early Paleozoic mobile belt in the west and the craton in the east is uncertain south of 18°S (Lucassen et al. 2000). The western limit of the Ordovician basin is marked by an early Paleozoic morphological high in northern Chile (Bahlburg and Hervé 1997). The gray box shows the sampling area. b, Distribution of the Ordovician sediments in south Bolivia and sample locations. The arrows indicate the principal directions of transport in the basin (Egenhoff 2000).

a , Distribution of different crustal segments in the Central Andes. The li...

Published: 01 July 2003
by an early Paleozoic morphological high in northern Chile (Bahlburg and Hervé 1997 ). The gray box shows the sampling area. b , Distribution of the Ordovician sediments in south Bolivia and sample locations. The arrows indicate the principal directions of transport in the basin (Egenhoff 2000 ).
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Structural cross section A-A′ from Figure 1 of the Andean margin at 51°30′S, showing the forearc region (after Polonia et al., 2007), the Southern Patagonian Batholith (schematically shown following intrusive ages from Hervé et al., 2007b), uplifted Paleozoic metamorphic basement, the Sarmiento ophiolite complex, the Patagonian fold-and-thrust belt, and Magallanes foreland basin. Lithospheric structure beneath the thrust belt and foreland region is based on geophysical studies by Robertson et al. (2003) and Lawrence and Wiens (2004) and extrapolated beneath the magmatic arc. RVB—Rocas Verdes Basin.

Structural cross section A-A′ from Figure 1 of the Andean margin at 51°30...

Published: 01 September 2011
Figure 2. Structural cross section A-A′ from Figure 1 of the Andean margin at 51°30′S, showing the forearc region (after Polonia et al., 2007 ), the Southern Patagonian Batholith (schematically shown following intrusive ages from Hervé et al., 2007b ), uplifted Paleozoic metamorphic basement
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General geology of the Southern Patagonian region (modified from Malkowski et al., 2017) showing new (1: EC141 and EC75, 2: RG47, 3:TN25, 4: RSC) and compiled (Halpern, 1973; Weaver et al., 1990; Bruce et al., 1991; Stern and Kilian, 1996; Martin et al., 2001; Hervé et al., 2007; 5, 6, and 7: Pepper et al., 2016) sample locations included in this study. The basin drainage area from the modern river sands is shown surrounded by yellow polygons. Ignimbrite U-Pb ages (brown circles) are from Pankhurst et al. (2000) and Malkowski et al. (2016).

General geology of the Southern Patagonian region (modified from Malkowski...

Published: 28 February 2024
Figure 2. General geology of the Southern Patagonian region (modified from Malkowski et al., 2017 ) showing new (1: EC141 and EC75, 2: RG47, 3:TN25, 4: RSC) and compiled ( Halpern, 1973 ; Weaver et al., 1990 ; Bruce et al., 1991 ; Stern and Kilian, 1996 ; Martin et al., 2001 ; Hervé et al
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Comparison of chemistry and arc tempo between the Neuquén Basin segment of the Andean arc and the central and southern Andes. Hf isotopic vales from this study are compared to 143Nd/144Nd isotopic vales reported by Haschke et al. (2002, 2006) for the central Andes and a compilation of data from Pankhurst et al. (1999), López-Escobar (1984), Muñoz et al. (2000), Lara et al. (2001), Pankhurst et al. (1992), and Pankhurst and Herve (1994) for the southern Andes. CHUR—chondritic uniform reservoir; DM—depleted mantle.

Comparison of chemistry and arc tempo between the Neuquén Basin segment of ...

Published: 01 June 2017
Figure 6. Comparison of chemistry and arc tempo between the Neuquén Basin segment of the Andean arc and the central and southern Andes. Hf isotopic vales from this study are compared to 143 Nd/ 144 Nd isotopic vales reported by Haschke et al. (2002 , 2006 ) for the central Andes
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Kernel density estimates (bandwidth = 5 m.y.) and histograms of U-Pb detrital zircon age distributions of nine La Anita, Piedra Clavada, and Springhill Formation subsurface samples and four outcrop Springhill Formation samples from 300 to 50 Ma. Age data are divided by periods: pre-Jurassic basement ages (200+ Ma); Jurassic silicic volcanic events, 200–178 Ma (V1), 172–162 Ma (V2), and 157–142 Ma (V3) (Pankhurst et al., 2000; Calderón et al., 2007); and Cretaceous Patagonian arc magmatism, 144–137 Ma (K1), 136–127 Ma (K2), and 126–75 Ma (K3) (Hervé et al., 2007). Bar and pie charts represent summary of sample's age distribution. Inset map shows location of each sample. n—number of grains dated; CGO—Cañadón Grande Oeste; CLC—Campo La Criolla; DYMC—Duque de York metamorphic complex; ER—Estancia Rosita; EAMC—Eastern Andean metamorphic complex; LA—Lago Argentino; LV—Lago Viedma; LDT—Laguna del Turco; MAB—Magallanes-Austral Basin; RVB—Rocas Verdes Basin.

Kernel density estimates (bandwidth = 5 m.y.) and histograms of U-Pb detrit...

Published: 20 November 2024
-Jurassic basement ages (200+ Ma); Jurassic silicic volcanic events, 200–178 Ma (V1), 172–162 Ma (V2), and 157–142 Ma (V3) ( Pankhurst et al., 2000 ; Calderón et al., 2007 ); and Cretaceous Patagonian arc magmatism, 144–137 Ma (K1), 136–127 Ma (K2), and 126–75 Ma (K3) ( Hervé et al., 2007 ). Bar and pie
Journal Article

Thrust-related metamorphism in Carboniferous slates of southern Patagonia (South America): the fate of forearc successions

Rodrigo Javier Suárez, Pablo Diego González, Sebastián Oriolo, Martín Nazareno Parada, Miguel Esteban Ramos, Matías C. Ghiglione, Claudia Zaffarana, Juan Albano, Juan José Ponce
Published: 17 May 2024
Journal of the Geological Society (2024) 181 (4): jgs2023-173.
DOI: https://doi.org/10.1144/jgs2023-173
...Fig. 8. Regional map of the South Patagonian Andes showing the location of sites with metamorphic constraints. The inset plots P – T estimates for the northeastern belt of the Eastern Andean Metamorphic Complex ( Hervé et al. 1999 ; Ramírez-Sánchez et al. 2005 ) and also includes a fossil...
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Composite kernel density estimates (bandwidth = 5 m.y.), histograms, and cumulative frequency distributions of U-Pb detrital zircon age distributions from Rocas Verdes Basin and Magallanes-Austral Basin stratigraphy grouped by lithostratigraphic formation from 300 to 50 Ma. La Anita, Piedra Clavada, and Springhill Formation core samples were analyzed as part of this study. La Anita Formation data were replotted from Dobbs et al. (2022), Austral sector Punta Barrosa Formation data were replotted from Malkowski et al. (2017a), and Última Esperanza sector Punta Barrosa Formation data were replotted from Fildani et al. (2003) and Malkowski et al. (2017a). Age data are divided by periods: pre-Jurassic basement ages (200+ Ma); Jurassic silicic volcanic events, 200–178 Ma (V1), 172–162 Ma (V2), and 157–142 Ma (V3) (Pankhurst et al., 2000; Calderón et al., 2007); and Cretaceous Patagonian arc magmatism, 144–137 Ma (K1), 136–127 Ma (K2), and 126–75 Ma (K3) (Hervé et al., 2007). Bar and pie charts represent summary of sample's age distribution. n— number of grains dated; UE—Última Esperanza.

Composite kernel density estimates (bandwidth = 5 m.y.), histograms, and cu...

Published: 20 November 2024
Figure 5. Composite kernel density estimates (bandwidth = 5 m.y.), histograms, and cumulative frequency distributions of U-Pb detrital zircon age distributions from Rocas Verdes Basin and Magallanes-Austral Basin stratigraphy grouped by lithostratigraphic formation from 300 to 50 Ma. La Anita
Journal Article

Detrital zircon provenance links between outcrop and subsurface, Rocas Verdes and Magallanes-Austral Basins, Patagonia

N. Gross Almonte, M.A. Malkowski, S.C. Dobbs, S.A. Graham
Journal: Geosphere
Published: 20 November 2024
Geosphere (2025) 21 (1): 74–94.
DOI: https://doi.org/10.1130/GES02745.1
...-Jurassic basement ages (200+ Ma); Jurassic silicic volcanic events, 200–178 Ma (V1), 172–162 Ma (V2), and 157–142 Ma (V3) ( Pankhurst et al., 2000 ; Calderón et al., 2007 ); and Cretaceous Patagonian arc magmatism, 144–137 Ma (K1), 136–127 Ma (K2), and 126–75 Ma (K3) ( Hervé et al., 2007 ). Bar and pie...
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View PDF for article title, Detrital zircon provenance links between outcrop and subsurface, Rocas Verdes and Magallanes-Austral <span class="search-highlight">Basins</span>, Patagonia
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Journal Article

Detrital isotopic record of a retreating accretionary orogen: An example from the Patagonian Andes

F.M. Rey, M.A. Malkowski, J.C. Fosdick, S.C. Dobbs, M. Calderón, M.C. Ghiglione, S.A. Graham
Journal: Geology
Published: 28 February 2024
Geology (2024) 52 (6): 395–399.
DOI: https://doi.org/10.1130/G51918.1
...; Martin et al., 2001 ; Hervé et al., 2007 ; Dobbs et al., 2022 ) and the modern volcanic arc (purple; Stern and Kilian, 1996 ) versus age. Abbreviations: DM—depleted mantle; CHUR—chondritic uniform reservoir ( Vervoort and Blichert-Toft, 1999 ; Bouvier et al., 2008 ); RVB—Rocas Verdes Basin. (B...
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View PDF for article title, Detrital isotopic record of a retreating accretionary orogen: An example from the Patagonian Andes
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Journal Article

Late Paleozoic magmatism and foreland deformation associated with opening and closing of marginal basins in the North Patagonian Andes

C. W. Rapela, M. García, F. Hervé, R. J. Pankhurst, M. Calderón, C. M. Fanning, S. O. Verdecchia
Published: 05 February 2024
Journal of the Geological Society (2024) 181 (2): jgs2023-171.
DOI: https://doi.org/10.1144/jgs2023-171
... continental arc of the Gondwana foreland ( Hervé et al. 2016 ). Accretion of a juvenile marginal basin that opened during the Early Devonian at the Gondwana active continental margin and closed in the Late Devonian to early Mississippian ( Rapela et al. 2021 ). In situ juvenile addition of magmas...
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View PDF for article title, Late Paleozoic magmatism and foreland deformation associated with opening and closing of marginal <span class="search-highlight">basins</span> in the North Patagonian Andes
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Journal Article

Magmatic arc evolution during the tectonic closure of the Rocas Verdes basin: insights from Cretaceous–earliest Paleocene intrusive rocks of Navarino Island (55°S), Fuegian Andes

Ricardo Velásquez, Joaquín Bastías-Silva, Esteban Salazar, Fernando Poblete, Mauricio González Guillot, David Chew, Matías Peña, Felipe Tapia, Adán Ramirez, Foteini Drakou
Published: 24 August 2023
Journal of the Geological Society (2023) 180 (5): jgs2022-163.
DOI: https://doi.org/10.1144/jgs2022-163
... , A. , Hervé , F. , Fanning , M. , Weislogel , A. and Cordani , U. 2007 . Late Jurassic bimodal magmatism in the northern sea-floor remnant of the Rocas Verdes basin, southern Patagonian Andes . Journal of the Geological Society, London , 164 , 1011 – 1022 , https://doi.org/10.1144/0016...
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View PDF for article title, Magmatic arc evolution during the tectonic closure of the Rocas Verdes <span class="search-highlight">basin</span>: insights from Cretaceous–earliest Paleocene intrusive rocks of Navarino Island (55°S), Fuegian Andes
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 (a) Late Cretaceous tectonic setting loosely based on Metcalf (1998), to show the possible transform fault margin setting of the West Burma block. The setting links the inferred transform fault setting of the Hpakan–Tawmaw jadeite tract with transpressional deformation in the Shan–Thai block. The motion of India is redrawn fromLeloup (2001, and website at http://image.univ-lyon1.fr/herve/RRF1.html). I–Y suture, Indus–Yardang suture. A note of caution regarding the hairpin path around 50 Ma: this extreme trajectory requires further work and verification before it can be considered reliable (P. H. Leloup, pers. comm.). (b, c) The regional geological evolution of SE Asia for the Eocene and Oligocene modified from Morley (2002). Dashed lines representing likely S directions are based on the sense of motion of major thrusts, strike-slip faults, metamorphic core-complex detachments, and faults in sedimentary basins (modified from Huchon et al. 1994).

( a ) Late Cretaceous tectonic setting loosely based on Metcalf (1998) , t...

Published: 01 September 2004
–Thai block. The motion of India is redrawn from Leloup (2001 , and website at http://image.univ-lyon1.fr/herve/RRF1.html). I–Y suture, Indus–Yardang suture. A note of caution regarding the hairpin path around 50 Ma: this extreme trajectory requires further work and verification before it can
Journal Article

The Cuesta de Rahue Basement Inlier (Southern Neuquén Precordillera, Argentina): a Devonian to Triassic polyphase orogenic record in northern Patagonia

Sebastián Oriolo, Pablo D. González, Pablo Alegre, Klaus Wemmer, Ricardo Varela, Miguel A. S. Basei
Published: 14 June 2023
Journal of the Geological Society (2023) 180 (4): jgs2022-143.
DOI: https://doi.org/10.1144/jgs2022-143
...-related magmatism and sedimentary basins (e.g. Varela et al. 2005 , 2015 ; Pankhurst et al. 2006 ; Hervé et al. 2008 , 2013 ; Navarrete et al. 2019 ; Oriolo et al. 2019 , 2023 ; Suárez et al. 2019 ). In particular, mid- to late Paleozoic tectonometamorphic and magmatic events...
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View PDF for article title, The Cuesta de Rahue Basement Inlier (Southern Neuquén Precordillera, Argentina): a Devonian to Triassic polyphase orogenic record in northern Patagonia
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Late Oligocene–early Miocene submarine volcanism and deep-marine sedimentation in an extensional basin of southern Chile: Implications for the tectonic development of the North Patagonian Andes

Alfonso Encinas, Andrés Folguera, Verónica Oliveros, Lizet De Girolamo Del Mauro, Francisca Tapia, Ricardo Riffo, Francisco Hervé, Kenneth L. Finger, Victor A. Valencia, Guido Gianni, Orlando Álvarez
Journal: GSA Bulletin
Published: 01 May 2016
GSA Bulletin (2016) 128 (5-6): 807–823.
DOI: https://doi.org/10.1130/B31303.1
... ). The origin of the Traiguén Basin is also debated, having been attributed to extensional tectonics ( Bartholomew and Tarney, 1984 ; Jordan et al., 2001 ), or to strike-slip tectonics ( Hervé et al., 1995 ). Submarine volcanism in the Traiguén Basin during the Cenozoic is significant because it indicates...
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View PDF for article title, Late Oligocene–early Miocene submarine volcanism and deep-marine sedimentation in an extensional <span class="search-highlight">basin</span> of southern Chile: Implications for the tectonic development of the North Patagonian Andes
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