Geodynamic Evolution of the Early Palaeozoic Continental Margin of Gondwana in the Southern Central Andes of Northwestern Argentina and Northern Chile

Bahlburg, Heinrich; Moya, M. Christina; Zeil, Werner

doi:10.1007/978-3-642-77353-2_21

Cited by 5 publications

(6 citation statements)

References 26 publications

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“…4b). Moreover, the CO was partially protected by a volcanic arc to the west which might explain why the composition of the www.nature.com/scientificreports/ assemblages of this area remained equally niche-and dispersal-assembled in the Tremadocian in comparison to the dispersal-assembled MN 44 . Another aspect of these data is that echinoderms in the CAA and the MN are assembled equally by both niche-and dispersal-processes during the Early Ordovician, without showing a change in community assembly processes (Fig.…”

Section: Resultsmentioning

confidence: 99%

Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation

Saleh

Guenser

Gibert

et al. 2022

Sci Rep

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The Early Ordovician is a key interval for our understanding of the evolution of life on Earth as it lays at the transition between the Cambrian Explosion and the Ordovician Radiation and because the fossil record of the late Cambrian is scarce. In this study, assembly processes of Early Ordovician trilobite and echinoderm communities from the Central Anti-Atlas (Morocco), the Montagne Noire (France), and the Cordillera Oriental (Argentina) are explored. The results show that dispersal increased diachronically in trilobite communities during the Early Ordovician. Dispersal did not increase for echinoderms. Dispersal was most probably proximally triggered by the planktic revolution, the fall in seawater temperatures, changes in oceanic circulation, with an overall control by tectonic frameworks and phylogenetic constraints. The diachronous increase in dispersal within trilobite communities in the Early Ordovician highlights the complexity of ecosystem structuring during the early stages of the Ordovician Radiation. As Early Ordovician regional dispersal was followed by well-documented continental dispersal in the Middle/Late Ordovician, it is possible to consider that alongside a global increase in taxonomic richness, the Ordovician Radiation is also characterized by a gradual increase in dispersal.

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Section: Resultsmentioning

confidence: 99%

Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation

Saleh

Guenser

Gibert

et al. 2022

Sci Rep

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“…Pampia has been correlated by some authors with the Arequipa-Antofalla block (Sims et al, 1998;Lucassen et al, 2000;Rapela, 2000;Bahlburg et al, 2000;Kleine et al, 2004;Steenken et al, 2004;Casquet et al, 2006;Collo et al, 2009). Very similar isotopic compositions of their basements and detrital zircon ages plus the absence of a major suture between them are important arguments in favor of this idea.…”

Section: Pampia: a Displaced Terrane From Kalahari?mentioning

confidence: 97%

“…Rapela (2000) and Von Gosen et al (2002) postulated that Pampia originated close to the Río de la Plata craton. Links with the Arequipa-Antofalla terrane have also been proposed (Rapela et al, 1998b;Keppie and Bahlburg, 1999;Bahlburg et al, 2000;Rapela, 2000;Kleine et al, 2004;Collo et al, 2009) as well as with Amazonia (Tosdal, 1996;Sims et al, 1998;Sánchez Bettucci and Rapalini, 2002;Steenken et al, 2004;Rapela et al, 2007;Adams et al, 2008a;Ramos et al, 2010) and the Kalahari craton (Schwartz and Gromet, 2004;Whitmeyer and Simpson, 2003;Rapela et al, 2007;Drobe et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Assembly of Pampia to the SW Gondwana margin: A case of strike-slip docking?

2012

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“…Sedimentary basin evolution provides crucial information to decipher past geodynamic constraints. Located on an active margin since at least the early Palaeozoic, the Central Andean Basin has been affected by various compressive, extensive and transpressive phases through time (e.g., Forsythe et al, 1993;Bahlburg et al, 1994;Bahlburg and Hervé, 1997;Dalziel, 1997;Coira et al, 1999;Rapalini, 2005;Ramos, 2008;Casquet et al, 2012;Weinberg et al, 2018). The Cambrian (Furongian -Stage 10) to Ordovician (Tremadocian -Tr1) interval of the basin consists of shallow-marine to fluvial sedimentary successions cropping out extensively in northwest Argentina (Provinces of Salta and Jujuy; Figures 1 and 2).…”

Section: Introductionmentioning

confidence: 99%

“…These stratigraphic units were subject to intense paleontological (e.g., Harrington and Leanza, 1957;Franco Tortello et al, 1999;Benedetto and Carrasco, 2002;Tortello and Esteban, 2003;Vaccari et al, 2004;Balseiro et al, 2011;Balseiro and Waisfeld, 2013;Albanesi et al, 2015;Muñoz and Benedetto, 2016;Waisfeld and Balseiro, 2016;Aris et al, 2017;Salas et al, 2018 among others) and paleoenvironmental (Moya, 1988;1998;Astini et al, 2003;Tortello and Esteban, 2003;Buatois et al, 2006) studies during the last decades. In addition, some studies focused on regional tectonostratigraphic reconstructions (e.g., Gohrbandt, 1992;Forsythe et al, 1993;Bahlburg et al, 1994;Bahlburg and Hervé, 1997;Ramos, 2008;. However, there is a marked paucity of studies attempting to frame detailed facies characterization within the perspective of basin evolution (Astini, 2003;Egenhoff, 2007).…”

Section: Introductionmentioning

confidence: 99%

Tectonic controls on deposition in the late Cambrian - Early Ordovician Central Andean Basin (Cordillera Oriental; northwest Argentina) – the first step towards an integrative reconstruction

Vaucher¹,

Vaccari²,

Balseiro³

et al. 2018

Preprint

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This study focuses on upper Cambrian – Lower Ordovician strata containing the lowermost fossil-bearing levels of the basin (Santa Rosita Formation and Guayoc Chico Group). Bounded by two major regional unconformities, this stratigraphic interval was previously considered as a retro-arc foreland basin displaying evidence of westward progradation without tectonic activity during its deposition. Throughout the sedimentary successions, four main facies zones are described, namely fluvial-estuarine, shoreface-foreshore, delta-front, and offshore-shelf environments. Biostratigraphic constrain is provided by trilobite biozones (Neoparabolina frequens argentina, Jujuyaspis keideli, Kainella andina, Kainella meridionalis and Kainella teiichii). Integrating sedimentary facies analysis, biostratigraphy, and sequence stratigraphy information from four selected areas across the Cordillera Oriental (Sierra de Cajas, Angosto del Moreno, Quebrada de Trancas and Quebrada de Moya; Province of Jujuy), a more complex evolution of the basin is proposed. Newly acquired data attest for a northward progradation of the system associated with a partially diachronic basin closure related to a first tectonic pulse induced by the Oclóyic phase. This southernmost tectonic pulse is recorded in various areas at the Cambrian-Ordovician boundary. It is highlighted by large highly erosive wave-ravinement surfaces and depositional geometries suggesting a major change in the basin physiography during the Cambrian-Ordovician transition. This study provides new results helping to constrain the evolution of the western Gondwana margin during the early Palaeozoic.

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Geodynamic Evolution of the Early Palaeozoic Continental Margin of Gondwana in the Southern Central Andes of Northwestern Argentina and Northern Chile

Cited by 5 publications

References 26 publications

Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation

Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation

Assembly of Pampia to the SW Gondwana margin: A case of strike-slip docking?

Tectonic controls on deposition in the late Cambrian - Early Ordovician Central Andean Basin (Cordillera Oriental; northwest Argentina) – the first step towards an integrative reconstruction

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