A new stratigraphic framework built on U-Pb single-zircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil)

Griffis, Neil; Mundil, Roland; Montañez, Isabel P.; Isbell, John L.; Fedorchuk, Nicholas D.; Vesely, Fernando Farias; Iannuzzi, Roberto; Yin, Qing‐Zhu

doi:10.1130/b31775.1

Cited by 121 publications

(56 citation statements)

References 51 publications

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“…Volcaniclastic deposits within the lowermost Rio Bonito Formation confirm a pre-CPB deglaciation age (298.9 Ma) for all glacial deposits in the southern to southeastern Paraná Basin (Cagliari et al, 2016;Griffis et al, 2018). U-Pb zircon CA-TIMS ages for volcaniclastics within the Candiota coals to the south (298.23 ± 0.31 Ma [sample CT1] to 297.77 + 0.35/−0.59 Ma [sample HNC]; age marker 1 in Fig.…”

Section: U-pb Zircon Ca-tims Chronostratigraphy For Southwestern To Smentioning

confidence: 69%

“…1; see Holz et al, 2006). U-Pb zircon laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) ages for volcaniclastic deposits sampled above SB-2 are variable and range from 298.8 ± 1.9 Ma to 281.3 ± 3.4 Ma, providing insufficient temporal resolution for constraining the unconformity (see the GSA Data Repository 1 ; Griffis et al, 2018).…”

Section: Geologic Setting Stratigraphy and Existing U-pb Geochronologymentioning

confidence: 99%

“…We present a chronostratigraphic framework for the Paraná and Karoo Basins, anchored by new (n = 6) and recently published (n = 5; Griffis et al, 2018) U-Pb single-crystal zircon CA-TIMS ages for volcaniclastic deposits, in order to evaluate the synchronicity of the LPIA demise in South America and southern Africa, respectively ( Fig. 1; see the Data Repository).…”

Section: U-pb Zircon Ca-tims Chronostratigraphy For Southwestern To Smentioning

confidence: 99%

“…1), which can be traced into nearby core HV-59 (see the Data Repository for location), and for a volcaniclastic layer in the Triunfo Member in the southeastern Paraná Basin (297.4 + 1.13/−1.19 Ma [sample ANT1]; age marker 5 in Fig. 1) all constrain glaciation in these regions of the Paraná Basin to >298 Ma (Griffis et al, 2018). These volcaniclastics overlie a regional sequence boundary (SB-2 and SB 1 + 2; Fig.…”

Section: U-pb Zircon Ca-tims Chronostratigraphy For Southwestern To Smentioning

confidence: 99%

“…The age for Paraguaçú Member is inferred based on the stratigraphic juxtaposition of marine mudstones over terrestrial and nearshore deposits, which are dated at 296.97 + 0.45/−0.72 Ma (age marker 2 in Fig. 1; Griffis et al, 2018). The apparent synchroneity of the aforementioned transgressive surfaces, which record an abrupt shift to marine conditions throughout both depositional basins, is interpreted to record a substantial loss of continental ice at 296 Ma (plus or minus several hundred thousand years) (T-P1 in Fig.…”

Section: U-pb Zircon Ca-tims Chronostratigraphy For Southwestern To Smentioning

confidence: 99%

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Coupled stratigraphic and U-Pb zircon age constraints on the late Paleozoic icehouse-to-greenhouse turnover in south-central Gondwana

Griffis

Montañez

Mundil

et al. 2019

Geology

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The demise of the Late Paleozoic Ice Age has been hypothesized as diachronous, occurring first in western South America and progressing eastward across Africa and culminating in Australia over an ∼60 m.y. period, suggesting tectonic forcing mechanisms that operate on time scales of 106 yr or longer. We test this diachronous deglaciation hypothesis for southwestern and south-central Gondwana with new single crystal U-Pb zircon chemical abrasion thermal ionizing mass spectrometry (CA-TIMS) ages from volcaniclastic deposits in the Paraná (Brazil) and Karoo (South Africa) Basins that span the terminal deglaciation through the early postglacial period. Intrabasinal stratigraphic correlations permitted by the new high-resolution radioisotope ages indicate that deglaciation across the S to SE Paraná Basin was synchronous, with glaciation constrained to the Carboniferous. Cross-basin correlation reveals two additional glacial-deglacial cycles in the Karoo Basin after the terminal deglaciation in the Paraná Basin. South African glaciations were penecontemporaneous (within U-Pb age uncertainties) with third-order sequence boundaries (i.e., inferred base-level falls) in the Paraná Basin. Synchroneity between early Permian glacial-deglacial events in southwestern to south-central Gondwana and pCO2 fluctuations suggest a primary CO2 control on ice thresholds. The occurrence of renewed glaciation in the Karoo Basin, after terminal deglaciation in the Paraná Basin, reflects the secondary influences of regional paleogeography, topography, and moisture sources.

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Section: U-pb Zircon Ca-tims Chronostratigraphy For Southwestern To Smentioning

confidence: 69%

Section: Geologic Setting Stratigraphy and Existing U-pb Geochronologymentioning

confidence: 99%

Section: U-pb Zircon Ca-tims Chronostratigraphy For Southwestern To Smentioning

confidence: 99%

Section: U-pb Zircon Ca-tims Chronostratigraphy For Southwestern To Smentioning

confidence: 99%

Section: U-pb Zircon Ca-tims Chronostratigraphy For Southwestern To Smentioning

confidence: 99%

See 3 more Smart Citations

Coupled stratigraphic and U-Pb zircon age constraints on the late Paleozoic icehouse-to-greenhouse turnover in south-central Gondwana

Griffis

Montañez

Mundil

et al. 2019

Geology

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Differences between autogenic and allogenic expressions of the Glossifungites Ichnofacies in estuarine and shoreface deposits from the Permian of the Paraná Basin, Brazil

Villegas‐Martín¹,

Netto

Kern³

2020

Geological Journal

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The Glossifungites Ichnofacies is a substrate-controlled ichnofacies that occurs in omission surfaces and has been used in the identification and interpretation of stratigraphic discontinuities. The Early Permian Rio Bonito-Palermo sedimentary succession from the Paraná Basin (southern Brazil) offers an opportunity to discuss the genesis of the omission surfaces demarked by the occurrence of Glossifungites suites. These suites are composed of sharp, unlined burrows with irregular boundaries and passive infill by generally medium-to coarse-grained sandstones. Thalassinoides is the dominant component in the Glossifungites suites in the studied deposits, with local occurrences of Diplocraterion, Gyrolithes, and Skolithos. Based on the ichnological signatures of the distinct Glossifungites suites observed in these deposits and the characteristics of the facies in which they occur, the associated discontinuity surfaces were interpreted as autogenic or allogenic. The morphological distinction between allogenic and autogenic expressions of the Glossifungites Ichnofacies is observed. Glossifungites suites demarking autogenic surfaces are associated with dewatered muddy substrates from the estuarine settings. Glossifungites suites demarking allogenic surfaces are characterized by large vertical burrows and occur in association with a sequence boundary and coplanar surfaces registered in lower shoreface settings.

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Permian Lycopsids from Brazil

Spiekermann,

Jasper,

Guerra-Sommer

et al. 2024

Brazilian Paleofloras

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A new stratigraphic framework built on U-Pb single-zircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil)

Cited by 121 publications

References 51 publications

Coupled stratigraphic and U-Pb zircon age constraints on the late Paleozoic icehouse-to-greenhouse turnover in south-central Gondwana

Coupled stratigraphic and U-Pb zircon age constraints on the late Paleozoic icehouse-to-greenhouse turnover in south-central Gondwana

Differences between autogenic and allogenic expressions of the Glossifungites Ichnofacies in estuarine and shoreface deposits from the Permian of the Paraná Basin, Brazil

Permian Lycopsids from Brazil

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