New Sakmarian ages for the Rio Bonito formation (Paraná Basin, southern Brazil) based on LA-ICP-MS U–Pb radiometric dating of zircons crystals

Cagliari, Joice; Lavina, Ernesto Luiz Corrêa; Philipp, Ruy Paulo; Tognoli, Francisco Manoel Wohnrath; Basei, Miguel Ângelo Stipp; Faccini, Ubiratan Ferrucio

doi:10.1016/j.jsames.2014.09.013

Cited by 59 publications

(18 citation statements)

References 37 publications

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“…Comparable faunas to those of western Australia were also recognized even further east, such as in Tibet of south China (Xinsheng, 1983), Malaysia (Shi et al, 1997), Western Yunnan (Shi et al, 1995, Irian Jaya (Archbold, 1982) and Timor (Archbold and Barkham, 1989;Archbold and Bird, 1989), in southeast Asia (Archbold, 2000; and references provided therein). On the other hand, Cagliari et al (2014) provided LA-ICP-MS U-Pb zircon age data, in parallel with the previous radiometric information mentioned above, which showed that deposition of the Rio Bonito Formation occurred between Sakmarian and Kungurian times, but suggesting the existence of significant hiatuses during its deposition. The period of time associated with such hiatuses suggests constraint deposition of the entire Itararé Group between Bashkirian-Moscovian times, contradicting absolute chronostratigraphy for most biochronology information (Cagliari et al, 2014) and significantly predating the age provided by marine fossil invertebrates in particular, including the Eurydesma fauna itself.…”

Section: The Taciba-bonete Eurydesma Faunal Composition: An Updated Csupporting

confidence: 81%

“…On the other hand, Cagliari et al (2014) provided LA-ICP-MS U-Pb zircon age data, in parallel with the previous radiometric information mentioned above, which showed that deposition of the Rio Bonito Formation occurred between Sakmarian and Kungurian times, but suggesting the existence of significant hiatuses during its deposition. The period of time associated with such hiatuses suggests constraint deposition of the entire Itararé Group between Bashkirian-Moscovian times, contradicting absolute chronostratigraphy for most biochronology information (Cagliari et al, 2014) and significantly predating the age provided by marine fossil invertebrates in particular, including the Eurydesma fauna itself.…”

Section: The Taciba-bonete Eurydesma Faunal Composition: An Updated Csupporting

confidence: 81%

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Eurydesma–Lyonia fauna (Early Permian) from the Itararé group, Paraná Basin (Brazil): A paleobiogeographic W–E trans-Gondwanan marine connection

Taboada

Neves

Weinschütz

et al. 2016

Palaeogeography, Palaeoclimatology, Palaeoecology

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Here, the biocorrelation of the marine invertebrate assemblages of the post-glacial succession in the uppermost portion of the Late Paleozoic Itararé Group (Paraná Basin, Brazil) is for the first time firmly constrained with other well-dated Gondwanan faunas. The correlation and ages of these marine assemblages are among the main controversial issues related to Brazilian Gondwana geology. In total, 118 brachiopod specimens were analyzed, and at least seven species were identified: Lyonia rochacamposi sp. nov., Langella imbituvensis (Oliveira),? Streptorhynchus sp.,? Cyrtella sp., Tomiopsis sp. cf. T. harringtoni Archbold and Thomas, Quinquenella rionegrensis (Oliveira) and Biconvexiella roxoi Oliveira. The presence of Tomiopsis sp. cf. T. harringtoni and the bivalve Atomodesma (Aphanaia) orbirugata (Harrington) in the Teixeira Soares beds plus Myonia argentinensis (Harrington) and Heteropecten paranaensis Neves et al., both of which recorded in deposits in the Teixeira Soares and Mafra beds (Butiá), suggests a biocorrelation with the Eurydesma fauna from the Bonete Formation, Sauce Grande-Colorado Basin, Argentina. Furthermore, the presence of Lyonia Archbold and Praeundulomya cf.subelongata Dickins in the Taciba Formation indicates affinities with deposits in the Lyons Group, Carnarvon Basin, and the Fossil Cliff Member, Perth Basin (Western Australia), suggesting a late Asselian-early Sakmarian age. Even more importantly, the collected data suggest the existence of an W-E trans-Gondwanan marine seaway between the Paraná (Brazil), Sauce Grande-Colorado (Argentina), Huab (Hardap shale of the Dwyka Group, Aranos area, Namibia, southwest Africa), the Carnavon (Western Australia) basins, and beyond eastward to the Cimmerian region. A V proto-rift system through two major axes of extensional basin development facilitated the W-E marine connection. Main axes formed by a north-northwesterly trending axis paralleling the future South Atlantic and a broadly north-northeasterly trending line of separation related to the future Indian Ocean. This proto-rift system coupled with a sea-level rise of at least 100 m, favored the establishment of a long narrow shallow seaway, allowing the exchange of Eurydesma fauna between eastern and western Gondwana.

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Section: The Taciba-bonete Eurydesma Faunal Composition: An Updated Csupporting

confidence: 81%

Section: The Taciba-bonete Eurydesma Faunal Composition: An Updated Csupporting

confidence: 81%

Eurydesma–Lyonia fauna (Early Permian) from the Itararé group, Paraná Basin (Brazil): A paleobiogeographic W–E trans-Gondwanan marine connection

Taboada

Neves

Weinschütz

et al. 2016

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…Although their age is not well established, Cagliari et al . [] constrained the upper limit for these units at 298 Ma from U‐Pb age. Both poles show single reversed polarity and were corrected for sedimentary inclination shallowing using the Tauxe and Kent [] elongation/inclination (E/I) statistical method, giving a flattening factor of 0.8.…”

Section: Resultsmentioning

confidence: 99%

A pure dipole analysis of the Gondwana apparent polar wander path: Paleogeographic implications in the evolution of Pangea

Gallo

Tomezzoli

Cristallini

2017

Geochem Geophys Geosyst

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The paleogeography of prebreakup Pangea at the beginning of the Atlantic Spreading has been a subject of debate for the past 50 years. Reconciling this debate involves theoretical corrections that cast doubt on available data and paleomagnetism as an effective tool for performing paleoreconstructions. This 50 year old debate focuses specifically on magnetic remanence and its ability to correctly record the inclination of the paleomagnetic field. In this paper, a selection of paleopoles was made to find the great circles containing the paleomagnetic pole and the respective sampling site. The true dipole pole (TDP) was then calculated by intersecting these great circles, effectively avoiding nondipolar contributions and inclination shallowing, in an innovative method. The great circle distance between each of these TDPs and the paleomagnetic means show the accuracy of paleomagnetic determinations in the context of a dominantly geocentric, axial, and dipolar geomagnetic field. The TDPs calculated allowed a bootstrap analysis to be performed to further consider the flattening factor that should be applied to the sedimentary‐derived paleopoles. It is argued that the application of a single theoretical correction factor for clastic sedimentary‐derived records could lead to a bias in the paleolatitude calculation and therefore to incorrect paleogeographic reconstructions. The unbiased APWP makes it necessary to slide Laurentia to the west in relation to Gondwana in a B‐type Pangea during the Upper Carboniferous, later evolving, during the Early Permian, to reach the final A‐type Pangea configuration of the Upper Permian.

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“…Despite some evidence for ash fall deposits in the Paraná Basin sequence (Matos et al, 2001;Guerra-Sommer et al, 2005, 2008aRocha-Campos et al, 2006Santos et al, 2006;Mori et al, 2012;Cagliari et al, 2014), there is no direct evidence for intrabasinal volcanic activity during the Permian Period, permitting us to discard the large-scale chemical interaction between sediments and volcanic materials to explain the negative values of δ 18 O found in the concretions. Likewise, there is no conclusive evidence of hydrothermal or metamorphic processes of percolation of hydrocarbon-rich fluids from the overlying hydrocarbon source units (i.e., the Rio Bonito and Irati formations; Milani and Zalán, 1999;Araújo et al, 2000).…”

Section: Discussionmentioning

confidence: 88%

Septarian carbonate concretions in the Permian Rio do Rasto Formation: Birth, growth and implications for the early diagenetic history of southwestern Gondwana succession

Alessandretti

Warren

Machado

et al. 2015

Sedimentary Geology

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a b s t r a c tBetween the Late Carboniferous and Early Triassic, the southwestern Gondwana supercontinent was characterized by the development of a huge intracratonic basin. A large confined epeiric sea and the accumulation of a transgressive-regressive sequence were formed by continuous subsidence related to tectonic effects caused by the Sanrafaelic Orogeny and the consequent generation of accommodation space. The Permian Rio do Rasto Formation documents the last progradational cycle related to the complete continentalization of this epeiric sea. The basal member of the Rio do Rasto Formation (Serrinha) is believed to have been deposited in a shallow epicontinental water body subjected to storms and influenced by episodic deltaic incursions. One of the most remarkable characteristics of the Serrinha Member is the presence of carbonate concretions hosted in mudstones and very fine sandstones. Here, we combine sedimentological and petrographic descriptions coupled with geochemical and stable carbon and oxygen isotopic data to elucidate the nature of these carbonate concretions. The nondeformed internal structure, decreasing proportion of carbonate cements relative to detrital grains toward the concretion edges, core-to-rim isotopic variations, and perhaps most importantly, the preservation of a welldeveloped cardhouse fabric support an early diagenetic origin for these structures at shallow burial depths of tens of meters. Stable isotope analyses of micritic calcite cements and calcites filling the septarian fractures reveal major negative excursions in both δ 18 O and δ 13 C values. Oxygen isotope ratios obtained for the micritic calcite cements vary between −12.1 and −2.6‰. The calcite filling septarian fractures also exhibit negative values of δ 18 O (− 14.2 to −13.8‰), with an average of − 14‰. The δ 13 C values of micritic calcite cements range from − 5.0-0.2‰. The carbon isotopic data from the calcite-filling septarian fractures are also negative (− 4.4 to −3.3‰). The δ 18 O signatures suggest that the early diagenetic carbonate concretions precipitated in a shallow freshwater environment rather than in a marine setting. The δ 13 C values suggest that the carbon isotopes were derived from a source with slightly depleted 13 C, supporting at least a partial organogenic contribution with weak sulfate reduction rates typical of freshwater systems. Sedimentological analysis shows that the epicontinental water body in which the Serrinha Member was deposited was constantly supplied by rivers and meteoric waters, which suggests that an enormous freshwater basin with restricted marine connections to the Panthalassa Ocean once existed.

show abstract

New Sakmarian ages for the Rio Bonito formation (Paraná Basin, southern Brazil) based on LA-ICP-MS U–Pb radiometric dating of zircons crystals

Cited by 59 publications

References 37 publications

Eurydesma–Lyonia fauna (Early Permian) from the Itararé group, Paraná Basin (Brazil): A paleobiogeographic W–E trans-Gondwanan marine connection

Eurydesma–Lyonia fauna (Early Permian) from the Itararé group, Paraná Basin (Brazil): A paleobiogeographic W–E trans-Gondwanan marine connection

A pure dipole analysis of the Gondwana apparent polar wander path: Paleogeographic implications in the evolution of Pangea

Septarian carbonate concretions in the Permian Rio do Rasto Formation: Birth, growth and implications for the early diagenetic history of southwestern Gondwana succession

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