SIMS U–Pb zircon geochronological constraints on upper Ediacaran stratigraphic correlations, South China

Yang, Chuan; Li, Xian‐Hua; Zhu, Maoyan; Condon, Daniel

doi:10.1017/s0016756816001102

Cited by 32 publications

(21 citation statements)

References 73 publications

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“…Ash bed from the middle Dengying Formation is dated at 546.3 ± 2.7 Ma (Fig. 5), similar with dates from Namibia and Oman sections, providing geochronological constraint on the Ediacaran fossils (Yang et al, 2017).…”

Section: Geochronological Constraints On Regional Stratigraphic Corresupporting

confidence: 59%

“…In this study, the ash bed from the lower Liuchapo Formation in the Longbizui section is dated at 545.76 ± 0.20/0.31/0.66 Ma, providing the first robust radiometric age for the late Ediacaran successions in deep-water settings in South China. Within errors this new date is identical to the date for the middle Jiucheng Member of Dengying Formation (Yang et al, 2017), indicating that the lower part of Liuchapo Formation in the deep water facies can be correlated to the lower Dengying Formation in the shallow water facies (Fig. 5).…”

Section: Geochronological Constraints On Regional Stratigraphic Corresupporting

confidence: 54%

“…Significant oxygenation events occurred in 535-520 Ma, with a minor one at ca. Radiometric ages are from Condon et al (2005), Compston et al (2008), Zhu et al (2009), Yang et al (2017), and this study. Stratigraphic columns and carbon isotopes of sections are from Zhu et al (2007), Wang et al (2012a), Cremonese et al (2013), and Li et al (2013b).…”

Section: Discussionmentioning

confidence: 61%

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Geochronological constraints on stratigraphic correlation and oceanic oxygenation in Ediacaran-Cambrian transition in South China

Yang

Zhu

Condon

et al. 2017

Journal of Asian Earth Sciences

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The continuous late Ediacaran-early Cambrian deep-water successions of South China archive the complete evolution of seawater chemical condition in deeper ocean during this critical time interval. However, the geochemical data from these poorly fossiliferous and condensed successions lack high-resolution stratigraphic constraints, hampering their interpretation for the spatio-temporal evolution of the sweater chemistry in this time interval. Here we report a new SIMS and CA-ID-TIMS zircon U-Pb age 545.76 ± 0.66 Ma (total uncertainty) of an ash bed at the lower Liuchapo Formation in the deep-water Longbizui section in western Hunan Province. The new age suggests that the lower and the middle-upper parts of the Liuchapo Formation in deep water facies can be correlated to the lower Dengying Formation and the upper Dengying-lower Zhujiaqing formations in shallow water facies, respectively. This correlation implies that the equivalent horizon of the Ediacaran-Cambrian boundary in the deep water facies in South China is likely located near the base of a widespread negative  13 Corg excursion at the upper Liuchapo Formation. The compilations of Fe-speciation, Mo, and U data, based on our new geochronological framework, indicate that the deep ocean was characterized by widespread anoxic, ferruginous water, with intermittent euxinic water impinged on the middle-lower slope in Ediacaran-Cambrian transition, and significant oxygenation events occurred in 535-520 Ma. And the compilations do not support the ca. 540 Ma oceanic oxygenation event.

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Section: Geochronological Constraints On Regional Stratigraphic Corresupporting

confidence: 59%

Section: Geochronological Constraints On Regional Stratigraphic Corresupporting

confidence: 54%

Section: Discussionmentioning

confidence: 61%

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Geochronological constraints on stratigraphic correlation and oceanic oxygenation in Ediacaran-Cambrian transition in South China

Yang

Zhu

Condon

et al. 2017

Journal of Asian Earth Sciences

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“…Litho‐chemo‐biostratigraphic data are from Zhu et al (2001) and D. Li et al (2013). Radioisotopic dates are from Compston et al (2008) and Yang et al (2017, 2018). Abbreviations: NCC = North China Craton; SGB = Songpan‐Ganzi Block; ICB = Indochina Block; EYP = Eastern part of the Yunan Province; DLT = Donglongtan; JC = Jiucheng; EPIP = Late Ediacaran positive carbon isotope plateau; BACE = Basal Cambrian negative carbon isotope excursion; ZHUCE = Zhujiaqing Carbon Isotope Excursion; A.‐P.…”

Section: Geological Background and Samplingmentioning

confidence: 99%

Provenance Evolution of Age‐Calibrated Strata Reveals When and How South China Block Collided With Gondwana

Yang

et al. 2020

Geophysical Research Letters

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The South China Block (SCB) has been regarded by many as an integral part of Gondwana, but proposed timing and processes for its accretion to Gondwana vary and remain contentious, largely owing to the lack of reliable Pan-African age paleomagnetic data and tectono-magmatic records from the SCB. Integrated in situ U-Pb ages and Hf-O isotope analyses of detrital zircons from geochronologically well-calibrated Ediacaran-Cambrian sedimentary rocks of western SCB reveal age populations of 2.51, 1.85, 1.20, 0.80, and 0.52 Ga. Detrital zircon age spectra indicate a major tectonic transition for the SCB during 0.56-0.54 Ga, interpreted to reflect the beginning of the collision between SCB-Indochina and NW India blocks. The collisional event lasted until early Ordovician, leading to the suturing of the SCB-Indochina to the northern margin of East Gondwana. Plain Language Summary The South China Block is thought to be a part of the Gondwana superterrane, which was composed of more than half of all continents 650-400 million years ago (Ma). However, questions of when and how the South China Block collided with Gondwana are yet to be answered. In this study, we conducted provenance analyses of sedimentary rocks whose depositional ages were known via radioisotopic dating and chemo-biostratigraphy in the western South China Block. The results reveal a change in tectonic setting of the South China Block at 560-540 Ma, interpreted as the onset of the collision between the South China Block and India along the northern margin of East Gondwana.

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“…Ma (Yang et al, 2017a). In western Hunan Province, an ash bed from the lower Liuchapo Formation, which is roughly equivalent to the Dengying Formation, gives a zircon U-Pb age of 545.76 ± 0.66 Ma (Yang et al, 2017b).…”

Section: Age Constraints the Dengying Formation In South China Is Wimentioning

confidence: 99%

Diverse biomineralizing animals in the terminal Ediacaran Period herald the Cambrian explosion

Cai

Xiao

et al. 2019

Geology

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Section location and sample horizon. The fossils were collected from the upper Beiwan Member of the upper Dengying Formation at the Lijiagou section in southern Shaanxi Province of South China (GPS: N32˚58ʹ25ʺ, E106˚14ʹ57ʺ). The Lijiagou section is paleogeographically located in the northwestern margin of the Yangtze Platform (Fig. DR1). At Lijiagou, the Beiwan Member is 29.4 m in thickness. It overlies the Gaojiashan Member of the middle Dengying Formation and underlies the Kuanchuanpu Formation (Figs. 1A, DR2B). The fossil horizon (Fig. DR2C) is located ~5-7 m below a disconformity that separates the Beiwan Member and the

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SIMS U–Pb zircon geochronological constraints on upper Ediacaran stratigraphic correlations, South China

Cited by 32 publications

References 73 publications

Geochronological constraints on stratigraphic correlation and oceanic oxygenation in Ediacaran-Cambrian transition in South China

Geochronological constraints on stratigraphic correlation and oceanic oxygenation in Ediacaran-Cambrian transition in South China

Provenance Evolution of Age‐Calibrated Strata Reveals When and How South China Block Collided With Gondwana

Diverse biomineralizing animals in the terminal Ediacaran Period herald the Cambrian explosion

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