Pennsylvanian glacimarine sedimentation in the Cushamen Formation, western North Patagonian Massif

Marcos, Paulo; Gregori, Daniel Alfredo; Benedini, Leonardo; Barros, Mercedes Virginia; Strazzere, Leonardo; Pivetta, Cecilia Mariana Pavon

doi:10.1016/j.gsf.2017.05.005

Cited by 15 publications

(12 citation statements)

References 33 publications

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“…Both lithotypes and metamorphic grade in the locus typicus of the Colohuincul Complex contrast significantly with those of the study area (sections and ; García‐Sansegundo et al, ; Martínez et al, ). In addition, metasedimentary rocks of the Colohuincul Complex were correlated with those of the Cushamen Formation (Cingolani et al, , and references therein), which may have a late Carboniferous deposition age (Hervé et al, ; Marcos et al, ), being thus incompatible with Middle Devonian to Carboniferous ages of metamorphism reported for the study area (section ; Martínez et al, ). For this reason, the Bariloche Complex is proposed as a new stratigraphic unit to include basement rocks exposed to the south of the Nahuel Huapi lake, which record Devonian‐Carboniferous metamorphism and Early Paleozoic maximum deposition ages (Hervé et al, ).…”

Section: Discussion and Interpretationmentioning

confidence: 82%

The Late Paleozoic Tectonometamorphic Evolution of Patagonia Revisited: Insights From the Pressure‐Temperature‐Deformation‐Time (P‐T‐D‐t) Path of the Gondwanide Basement of the North Patagonian Cordillera (Argentina)

et al. 2019

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Combined field structural analysis with in situ electron probe microanalysis Th‐U‐Pb monazite dating, petrologic, and microstructural data provides a reconstruction of the pressure‐temperature‐deformation‐time (P‐T‐D‐t) path of the Gondwanide basement of the North Patagonian Cordillera. For samples from the Challhuaco hill, the timing of development of the metamorphic S2 foliation and associated L2 lineation and tight to isoclinal F2 folds is constrained by monazite ages of 299 ± 8 and 302 ± 16 Ma during peak metamorphic conditions of ~ 650 °C and 11 kbar, achieved during prograde metamorphism and progressive deformation. Metamorphism and deformation of metamorphic complexes of the North Patagonian Andes seem to record Late Paleozoic crustal thickening and are coeval with metamorphism of accretionary complexes exposed further west in Chile, suggesting a coupled Late Devonian‐Carboniferous evolution. Instead of the result of continental collision, the Gondwanide orogeny might thus be essentially linked to transpression due to advancing subduction along the proto‐Pacific margin of Gondwana. On the other hand, second generation of monazite ages of 171 ± 9 and 170 ± 7 Ma constrains the timing of low‐grade metamorphism related to kink band and F3 open fold development during Jurassic transtension and emplacement of granitoids. Finally, a Cretaceous overprint, likely resulting from hydrothermal processes, is recorded by monazite ages of 110 ± 10 and 80 ± 20 Ma, which might be coeval with deformation along low‐grade shear zones during the onset of Andean transpression.

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Section: Discussion and Interpretationmentioning

confidence: 82%

The Late Paleozoic Tectonometamorphic Evolution of Patagonia Revisited: Insights From the Pressure‐Temperature‐Deformation‐Time (P‐T‐D‐t) Path of the Gondwanide Basement of the North Patagonian Cordillera (Argentina)

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“…1; Varela et al, 2005, Pankhurst et al, 2006Deckart et al, 2014;Gregori et al, 2020, among others). In the western North Patagonian massif, the igneous bodies of the Permian magmatism correspond to the Mamil Choique Formation and were emplaced into the metamorphic rocks of Cushamen Formation (González et al, 2003;Varela et al, 2005;von Gosen, 2009;Marcos et al, 2018;Gregori et al, 2020).…”

Section: Geological Settingmentioning

confidence: 99%

“…sedimentation took place during pre-Carboniferous times, whileDuhart et al, (2002),Hervé et al, (2005) andMarcos et al, (2018) suggest formation in the Carboniferous. Based on the U/Pb ages presented here on the Cushamen Formation, the younger population of detrital zircons points to an age of sedimentation younger than 369 ± 8 Ma (Figs.…”

mentioning

confidence: 98%

“…probably later than Upper Devonian.The Precambrian detrital zircon populations (P1 and P2) are an important provenance source (Fig.9c) possibly comes from the ancient western Gondwana J o u r n a l P r e -p r o o f massifs (e.g., the Rio de La Plata Craton). Cambrian and Ordovician zircons (P3 and P4 -Fig.9c) are probably related to the magmatism and metamorphism recorded in the eastern North Patagonian Massif, while the Silurian-Devonian population (P5 -Fig.9c) possibly comes from igneous units that are presently in the Lake Region (Chile), the Septentrional Patagonian Cordillera and the North Patagonian Massif(Marcos et al, 2018). 9.1.2 Prograde metamorphism 9.1.2.1 First prograde metamorphic stage…”

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confidence: 99%

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Late Paleozoic geodynamic evolution of the western North Patagonian Massif and its tectonic context along the southwestern Gondwana margin

Marcos

Pivetta

Benedini

et al. 2020

Lithos

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“…Furthermore, both these units would be, at least in part, equivalents to the southern Río Lácteo/Bahía de la Lancha formations and equivalents (Giacosa and Márquez, 2002 and references therein). Recently, the Llanquihue basement Complex (Hervé et al, 2016) in the subsurface of Los Muermos (Chile, close to 41º S) was considered to be contemporaneous with the Esquel and Arroyo Pescado formations, all of them forming an hypothetical late Devonian-early Carboniferous marine basin in the extra-Andean Chubut and southern Chile (Marcos et al, 2017) ( Fig. 4).…”

Section: Stratigraphic Correlationsmentioning

confidence: 99%

Carboniferous deposits of northern Sierra de Tecka, central-western Patagonia, Argentina: paleontology, biostratigraphy and correlations

Taboada¹,

Pagani²,

Pinilla³

et al. 2019

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A narrow upper Paleozoic belt crops out in the northern tip of Sierra de Tecka through the Quebrada de Güera-Peña (Patagonia, Argentina). There, black shales of the Pampa de Tepuel Formation contain marine fossil invertebrates previously listed as belonging to the “Levipustula” fauna. Material recently recorded by the authors comprises, in order of abundance, gastropods [Glabrocingulum (Glabrocingulum) poperimense (Maxwell), G. (Stenozone) argentinum (Reed), G. (Stenozone) sp., Peruvispira teckaensis sp. nov., Ananias riccardii Pinilla], bivalves [Nuculopsis (Nuculopsis) patagoniensis González, Phestia tepuelensis González, Streblochondria sueroi González, Streblopteria sp.], conulariids [Paraconularia cf. ugartei Cúneo and Sabattini], brachiopods [Amosia sueroi Simanauskas, Languigneotus laevicaudatum (Amos), Beecheria patagonica Amos], trilobites [Australosutura argentinensis Hahn and Hahn], cephalopods [Pseudoorthoceratidae Flower and Caster, Sueroceras? sp., Mitorthoceras? sp.], and rugose corals [?Lophophyllidiidae Moore and Jeffords]. In addition, the present study includes the new key brachiopods Languigneotus dammanorum gen. et sp. nov. and Tuberculatella waterhousei sp. nov. from younger localities of the Tepuel-Genoa Basin. The Languigneotus laevicaudatum and Languigneotus-Verchojania subzones (late Pennsylvanian) are proposed herein to replace the former Tuberculatella Zone. In addition, previous stratigraphic relationships and correlations of the study section with the Arroyo Pescado (Estancia Ap Iwan) and Esquel areas are discussed. The general stratigraphic profile of a glacial-related section cropping out at Estancia Ap Iwan includes lower conglomeradic beds, which are reinterpreted as early Jurassic in age, and glacimarine levels that are partially equivalent to the Pampa de Tepuel Formation but older than those of Quebrada de Güera-Peña. A correlation of the Esquel Formation with the Arroyo Pescado Formation and other contemporaneous units on the paleopacific margin is assessed, implying that the Esquel Formation should be segregated from the Tepuel Group. The Esquel and Arroyo Pescado formations can be regarded as the basement of the glaciomarine column of the Tepuel-Genoa Basin.

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Pennsylvanian glacimarine sedimentation in the Cushamen Formation, western North Patagonian Massif

Cited by 15 publications

References 33 publications

The Late Paleozoic Tectonometamorphic Evolution of Patagonia Revisited: Insights From the Pressure‐Temperature‐Deformation‐Time (P‐T‐D‐t) Path of the Gondwanide Basement of the North Patagonian Cordillera (Argentina)

The Late Paleozoic Tectonometamorphic Evolution of Patagonia Revisited: Insights From the Pressure‐Temperature‐Deformation‐Time (P‐T‐D‐t) Path of the Gondwanide Basement of the North Patagonian Cordillera (Argentina)

Late Paleozoic geodynamic evolution of the western North Patagonian Massif and its tectonic context along the southwestern Gondwana margin

Carboniferous deposits of northern Sierra de Tecka, central-western Patagonia, Argentina: paleontology, biostratigraphy and correlations

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