Astronomically forced cycles in Middle Permian fluvial sediments from Karoo Basin (South Africa)

Lanci, L.; Galeotti, Simone; Ratcliffe, Kenneth T.; Tohver, Eric; Wilson, Anne B.; Flint, Stephen S.

doi:10.1016/j.palaeo.2022.110973

Cited by 5 publications

(7 citation statements)

References 41 publications

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“…Here, the age of the boundary can be precisely calibrated. At Ouberg Pass in the southwest (Figure 1), the end‐Kiaman is dated at 266.5 ± 0.26 Ma (Lanci et al., 2022). The base of the Beaufort Group at Ouberg Pass occurs 138.9 m below this (Lanci et al., 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Lanci et al. (2022) presented a cyclostratigraphic calibration combined with radiometric ages and reported a 266.5 ± 0.26 Ma age for the end‐Kiaman at Ouberg Pass (i.e., start of GU1n). The Tierberg, Kookfontein, and much of the Waterford formations of the Ecca Group in the southwestern part of the basin are characterized by dominantly reversed magnetic polarity, with a normal polarity magnetozone in the middle of the Tierberg Formation reported from the top of the KWZ‐01 core and several poorly constrained normal polarity subzones in the Kookfontein, Skoorsteenberg, and lower Tierberg formations (Abubakre & De Kock, 2021; Belica, Tohver, Flint, et al., 2017).…”

Section: Discussionmentioning

confidence: 99%

“…The base of the Beaufort Group at Ouberg Pass occurs 138.9 m below this (Lanci et al., 2013). The base of the Beaufort Group at Ouberg Pass can thus be dated at 267.4 ± 0.26 Ma assuming a constant sedimentation rate of 16 cm/kyr (Lanci et al., 2022). In KWV‐01, the same lithological boundary falls within the middle part the KWV3 normal polarity magnetozone (i.e., correlated to GU1n; Figure 12) and corresponds to the middle of polarity magnetozone N2 at Ouberg Pass (∼27 m above the end‐Kiaman) with an age of 266.3 ± 0.26 Ma, using the astronomically calibrated age model of Lanci et al.…”

Section: Discussionmentioning

confidence: 99%

“…More recently, Lanci et al. (2022) presented an astronomically calibrated age model from the southwest Karoo Basin and a 266.5 Ma age for the end‐Kiaman.…”

Section: Introductionmentioning

confidence: 99%

“…These occur stratigraphically above reversely magnetized interbedded sedimentary and volcanic units, and therefore constrain the end-Kiaman to coincide with the Wordian-Capitanian boundary at ∼265 Ma (Figure 2). More recently, Lanci et al (2022) presented an astronomically calibrated age model from the southwest Karoo Basin and a 266.5 Ma age for the end-Kiaman.…”

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confidence: 99%

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Permian Magnetostratigraphy and End of the Kiaman Reverse Polarity Superchron From the Southeast Karoo Basin, South Africa

Kock

Abubakre

2022

JGR Solid Earth

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Within the southern main Karoo Basin, the late Carboniferous to mid-Jurassic Karoo Supergroup of South Africa (Figure 1) represents a 12-km thick, laterally continuous, clastic sedimentary succession that was deposited in a retro-arc foreland setting in response to subduction and accretionary tectonics along the southwest margin of Gondwana (Johnson et al., 1996(Johnson et al., , 2006. During the Permian, an interplay between regional tectonics, an icehouse to greenhouse climatic transition, and a marine incursion resulted in deepening of the southern main Karoo Basin and deposition of the Ecca Group (Catuneanu et al., 2002;Cole, 1992).The Ecca Group is well documented in the southwest section of the basin in terms of lithostratigraphy (

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…More recently, Lanci et al. (2022) presented an astronomically calibrated age model from the southwest Karoo Basin and a 266.5 Ma age for the end‐Kiaman.…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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