Tectonic and palaeoenvironmental evolution of Mesozoic sedimentary basins along the Andean foothills of Argentina (32°-54°S)

J. Franzese, L. A. Spalletti, I. Gomez-Perez, David Iain MacPherson MacDonald

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

Chronoenvironmental and tectonic charts are presented for Mesozoic basins located along the Andean foothills of the South American plate. On the basis of the main tectonic events, pre-Andean basins, break-up-related basins, extensional back-arc basins, and Andean foreland basins are recognized. The pre-Andean basins were formed by continental extension and strike-slip movement before the development of the Mesozoic-Cenozoic Andean magmatic arc. Upper Permian to Middle Triassic extension along Palaeozoic terrane sutures resulted in rifting, bimodal magmatism (Choiyoi group), and continental deposition (Cuyo basin). From the Late Triassic to the Early Jurassic, continental extension related to the collapse of the Gondwana orogen initiated a series of long, narrow half-grabens that filled with continental volcaniclastic deposits. These depocenters were later integrated into the Neuquen basin. Coeval development of the shallow marine Pampa de Agnia basin (42-44degreesS) is related to short-lived extension, probably driven by dextral displacement along major strike-slip faults (e.g. the Gastre fault system).

Widespread extension related to the Gondwana breakup (180-165 Ma) and the opening of the Weddell Sea reached the western margin of the South American plate. As a result, wide areas of Patagonia were affected by intraplate volcanism (Chon Aike province), and early rifting occurred in the Magallanes basin.

The Andean magmatic arc was almost fully developed by Late Jurassic times. A transgressive stage with starvation and anoxia characterized the Neuquen basin. In western Patagonia, back-arc and intra-arc extension produced the opening of several grabens associated with explosive volcanism and lava flows (e.g. Rio Mayo, El Quemado). To the south, a deep marginal basin floored by oceanic crust (Rocas Verdes) developed along the back-arc axis. In mid-to late Cretaceous times, Andean compressional tectonics related to South Atlantic spreading caused the inversion of previous extensional structures and the beginning of a retro-arc foreland phase in the Neuquen and Austral basins. (C) 2003 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)81-90
Number of pages9
JournalJournal of South American Earth Sciences
Volume16
Issue number1
DOIs
Publication statusPublished - 2003

Keywords

  • Argentina
  • Gondwana
  • Mesozoic
  • paleogeography
  • sedimentary basins
  • South America
  • SOUTHERN SOUTH-AMERICA
  • BREAK-UP
  • SOUTHWESTERN GONDWANA
  • ANTARCTIC PENINSULA
  • SILICIC VOLCANISM
  • NEUQUEN BASIN
  • PATAGONIA
  • EXTENSION
  • PROVINCE

Cite this

Tectonic and palaeoenvironmental evolution of Mesozoic sedimentary basins along the Andean foothills of Argentina (32°-54°S). / Franzese, J.; Spalletti, L. A.; Gomez-Perez, I.; MacDonald, David Iain MacPherson.

In: Journal of South American Earth Sciences, Vol. 16, No. 1, 2003, p. 81-90.

Research output: Contribution to journalArticle

Franzese, J. ; Spalletti, L. A. ; Gomez-Perez, I. ; MacDonald, David Iain MacPherson. / Tectonic and palaeoenvironmental evolution of Mesozoic sedimentary basins along the Andean foothills of Argentina (32°-54°S). In: Journal of South American Earth Sciences. 2003 ; Vol. 16, No. 1. pp. 81-90.
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AU - MacDonald, David Iain MacPherson

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N2 - Chronoenvironmental and tectonic charts are presented for Mesozoic basins located along the Andean foothills of the South American plate. On the basis of the main tectonic events, pre-Andean basins, break-up-related basins, extensional back-arc basins, and Andean foreland basins are recognized. The pre-Andean basins were formed by continental extension and strike-slip movement before the development of the Mesozoic-Cenozoic Andean magmatic arc. Upper Permian to Middle Triassic extension along Palaeozoic terrane sutures resulted in rifting, bimodal magmatism (Choiyoi group), and continental deposition (Cuyo basin). From the Late Triassic to the Early Jurassic, continental extension related to the collapse of the Gondwana orogen initiated a series of long, narrow half-grabens that filled with continental volcaniclastic deposits. These depocenters were later integrated into the Neuquen basin. Coeval development of the shallow marine Pampa de Agnia basin (42-44degreesS) is related to short-lived extension, probably driven by dextral displacement along major strike-slip faults (e.g. the Gastre fault system).Widespread extension related to the Gondwana breakup (180-165 Ma) and the opening of the Weddell Sea reached the western margin of the South American plate. As a result, wide areas of Patagonia were affected by intraplate volcanism (Chon Aike province), and early rifting occurred in the Magallanes basin.The Andean magmatic arc was almost fully developed by Late Jurassic times. A transgressive stage with starvation and anoxia characterized the Neuquen basin. In western Patagonia, back-arc and intra-arc extension produced the opening of several grabens associated with explosive volcanism and lava flows (e.g. Rio Mayo, El Quemado). To the south, a deep marginal basin floored by oceanic crust (Rocas Verdes) developed along the back-arc axis. In mid-to late Cretaceous times, Andean compressional tectonics related to South Atlantic spreading caused the inversion of previous extensional structures and the beginning of a retro-arc foreland phase in the Neuquen and Austral basins. (C) 2003 Elsevier Science Ltd. All rights reserved.

AB - Chronoenvironmental and tectonic charts are presented for Mesozoic basins located along the Andean foothills of the South American plate. On the basis of the main tectonic events, pre-Andean basins, break-up-related basins, extensional back-arc basins, and Andean foreland basins are recognized. The pre-Andean basins were formed by continental extension and strike-slip movement before the development of the Mesozoic-Cenozoic Andean magmatic arc. Upper Permian to Middle Triassic extension along Palaeozoic terrane sutures resulted in rifting, bimodal magmatism (Choiyoi group), and continental deposition (Cuyo basin). From the Late Triassic to the Early Jurassic, continental extension related to the collapse of the Gondwana orogen initiated a series of long, narrow half-grabens that filled with continental volcaniclastic deposits. These depocenters were later integrated into the Neuquen basin. Coeval development of the shallow marine Pampa de Agnia basin (42-44degreesS) is related to short-lived extension, probably driven by dextral displacement along major strike-slip faults (e.g. the Gastre fault system).Widespread extension related to the Gondwana breakup (180-165 Ma) and the opening of the Weddell Sea reached the western margin of the South American plate. As a result, wide areas of Patagonia were affected by intraplate volcanism (Chon Aike province), and early rifting occurred in the Magallanes basin.The Andean magmatic arc was almost fully developed by Late Jurassic times. A transgressive stage with starvation and anoxia characterized the Neuquen basin. In western Patagonia, back-arc and intra-arc extension produced the opening of several grabens associated with explosive volcanism and lava flows (e.g. Rio Mayo, El Quemado). To the south, a deep marginal basin floored by oceanic crust (Rocas Verdes) developed along the back-arc axis. In mid-to late Cretaceous times, Andean compressional tectonics related to South Atlantic spreading caused the inversion of previous extensional structures and the beginning of a retro-arc foreland phase in the Neuquen and Austral basins. (C) 2003 Elsevier Science Ltd. All rights reserved.

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KW - sedimentary basins

KW - South America

KW - SOUTHERN SOUTH-AMERICA

KW - BREAK-UP

KW - SOUTHWESTERN GONDWANA

KW - ANTARCTIC PENINSULA

KW - SILICIC VOLCANISM

KW - NEUQUEN BASIN

KW - PATAGONIA

KW - EXTENSION

KW - PROVINCE

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DO - 10.1016/S0895-9811(03)00020-8

M3 - Article

VL - 16

SP - 81

EP - 90

JO - Journal of South American Earth Sciences

JF - Journal of South American Earth Sciences

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