Basement control, sedimentary basin inception and early evolution of the Mesozoic basins in the Patagonian foreland

Giacosa, Raúl Eduardo

doi:10.1016/j.jsames.2019.102407

Cited by 19 publications

(2 citation statements)

References 47 publications

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“…Continued extension, magmatism and the formation of associated hydrothermal systems gave rise to the development of low to intermediate sulfidation epithermal veins which have predominant NW strike (Echeveste, 2010). The distribution and orientation of these coincide with regional geological lineaments of NW and NNW orientation (Guido and Campbell, 2011;Giacosa et al, 2010), which imply reactivation of Lower Paleozoic NNW to NW basement structures (Homovc and Constantini, 2001;Giacosa, 2020). In turn, the effusive facies are associated with ENE and NNW lineaments, showing that the volcanic materials were mostly extruded through the Jurassic extensional fractures, occasionally generating caldera structures (Guido, 2004).…”

Section: Structural Frameworkmentioning

confidence: 87%

Influence of structures and lithologies in the morphology and localization of Au–Ag mineralization at Martinetas deposit, Don Nicolas mine, Deseado Massif, Argentina

Martino

Jovic

López

et al. 2022

Journal of South American Earth Sciences

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Section: Structural Frameworkmentioning

confidence: 87%

Influence of structures and lithologies in the morphology and localization of Au–Ag mineralization at Martinetas deposit, Don Nicolas mine, Deseado Massif, Argentina

Martino

Jovic

López

et al. 2022

Journal of South American Earth Sciences

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“…It belongs to an igneous metamorphic belt in the southern margin of the North Patagonian Massif (NPM, Fig. 1) with a NW-SE trend and its tectonic structures have had a strong influence on the geological evolution of central Patagonia (Figari et al, 2015;Bilmes et al, 2013;Echaurren et al, 2016;Zaffarana et al, 2017;Bucher et al, 2019;Renda et al, 2019;Suarez et al, 2019;Ruiz González et al, 2020;Foix et al, 2020;Giacosa et al, 2020;Serra-Varela et al, 2020;Marcos et al, 2020). The metamorphic and plutonic rocks comprising this belt have been grouped, in general, under the medium-high metamorphic grade Cushamen Formation (Volkheimer, 1964) and the plutonic Mamil Choique Formation (Ravazzoli and Sesana, 1977).…”

Section: Introductionmentioning

confidence: 99%

The Paleozoic Central Patagonian Igneous Metamorphic Belt: its geodynamic and tectonic interpretation based on Paleogeographic reconstructions

Vizán¹

2022

Preprint

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In the southwestern margin of the North Patagonian Massif there is a NW 26 SE belt of igneous and metamorphic rocks defining a limit between the North Patagonian Massif and southern Patagonia (including the Deseado Massif), named the Central Patagonian Igneous Metamorphic Belt (CPIMB). The objective of this paper is to better understand the geodynamic and tectonic processes that generated its rocks and structures. More specifically, explanations are offered for different questions: 1) the aforementioned belt corresponds to a collisional or accretionary orogen? 2) during which geological event it was built? 3) how was the South American plate driftting during that process? 4) why the foliation of the rocks of one of its localities presents a different structural attitude than others? To answer these questions, paleogeographic reconstructions were performed based on paleomagnetic data ranging from ca.415 Ma to ca.305 Ma. Through these reconstructions and considering the middle and upper Paleozoic rocks located in a central area of this deformational belt (the Taquetrén range) and the geological background of several authors, it was possible to separate the processes involved in two tectonic cycles: the Chanic (late Devonian) and the Gondwanan (Carboniferous-Permian) events. The CPIMB presents rocks from an ancient orogen that was built mainly during the Chanic event. In the Taquetrén range the orogenic process would extend between approximately 400 Ma and about 360 Ma. Based on the data of this area, the Chanic orogen collapsed between about 360 Ma and about 330 Ma as the result of an abrupt change in the movement of South America along with all the other continents that constituted Gondwana. From a global geodynamic perspective, it is known that Pangea formed on a mantle super downwelling, where subduction zones surrounded this supercontinent. This caused magmatic processes in its margins and, in the Taquetrén range, triggered a plutonic emplacement in the old structures of the previous metamorphic rocks of the orogen at about 315 Ma. In these plutonic rocks, a Gondwanan tectonic event is recorded at about 300 Ma. During this event, a suggested transpressive deformation could have determined the assembly of southern Patagonia with the rest of the lithospheric domains of South America. This tectonic event ended in the central area of CPIMB before the intrusion of non-deformed batholiths during the Permian.

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Early Paleozoic structural and metamorphic evolution of the Transpatagonian Orogen related to Gondwana assembly

González

Naipauer

Sato

et al. 2020

Int J Earth Sci (Geol Rundsch)

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Basement control, sedimentary basin inception and early evolution of the Mesozoic basins in the Patagonian foreland

Cited by 19 publications

References 47 publications

Influence of structures and lithologies in the morphology and localization of Au–Ag mineralization at Martinetas deposit, Don Nicolas mine, Deseado Massif, Argentina

Influence of structures and lithologies in the morphology and localization of Au–Ag mineralization at Martinetas deposit, Don Nicolas mine, Deseado Massif, Argentina

The Paleozoic Central Patagonian Igneous Metamorphic Belt: its geodynamic and tectonic interpretation based on Paleogeographic reconstructions

Early Paleozoic structural and metamorphic evolution of the Transpatagonian Orogen related to Gondwana assembly

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