Eustatic change across the Paleocene-Eocene Thermal Maximum in the epicontinental Tarim seaway

Jiang, Jingxin; Hu, Xiumian; Li, Juan; Garzanti, Eduardo; Jiang, Shijun; Cui, Ying; Wang, Yasu

doi:10.1016/j.gloplacha.2023.104241

Cited by 9 publications

(3 citation statements)

References 93 publications

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“…Variability in OC petro MARs could also be attributed to changes in sea level during the PETM. Indeed, various studies have suggested marine transgression during the PETM, including: ACEX (Sluijs et al., 2006); ODP Site 1172 (Sluijs et al., 2011); Kheu River (Shcherbinina et al., 2016); the Atlantic Coastal Plain (John et al., 2008); and elsewhere (Jiang et al., 2023; Li et al., 2020 and references therein; Sluijs, Brinkhuis, et al., 2008 and references therein). However, although sea level rise is expected to reduce the supply of terrestrial organic carbon into the marine realm, this is rarely observed (e.g., Sluijs et al., 2014) and most PETM sites are characterized by enhanced terrigenous material during the PETM (Carmichael et al., 2017 and references therein).…”

Section: Discussionmentioning

confidence: 99%

Spatial and Temporal Patterns in Petrogenic Organic Carbon Mobilization During the Paleocene‐Eocene Thermal Maximum

Hollingsworth,

Elling,

Badger

et al. 2024

Paleoceanog and Paleoclimatol

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The Paleocene‐Eocene Thermal Maximum (PETM) was a transient global warming event and is recognized in the geologic record by a prolonged negative carbon isotope excursion (CIE). The onset of the CIE was due to a rapid influx of 13C‐depleted carbon into the ocean‐atmosphere system. However, the mechanisms required to sustain the negative CIE remains unclear. Enhanced mobilization and oxidation of petrogenic organic carbon (OCpetro) has been invoked to explain elevated atmospheric carbon dioxide concentrations after the onset of the CIE. However, existing evidence is limited to the mid‐latitudes and subtropics. Here, we determine whether: (a) enhanced mobilization and subsequent burial of OCpetro in marine sediments was a global phenomenon; and (b) whether it occurred throughout the PETM. To achieve this, we utilize a lipid biomarker approach to trace and quantify OCpetro burial in a global compilation of PETM‐aged shallow marine sites (n = 7, including five new sites). Our results confirm that OCpetro mass accumulation rates (MARs) increased within the subtropics and mid‐latitudes during the PETM, consistent with evidence of higher physical erosion rates and intense episodic rainfall events. High‐latitude sites do not exhibit drastic changes in the source of organic carbon during the PETM and OCpetro MARs increase slightly or remain stable, perhaps due a more stable hydrological regime. Crucially, we also demonstrate that OCpetro MARs remained elevated during the recovery phase of the PETM. Although OCpetro oxidation was likely an important positive feedback mechanism throughout the PETM, we show that this feedback was both spatially and temporally variable.

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Section: Discussionmentioning

confidence: 99%

Spatial and Temporal Patterns in Petrogenic Organic Carbon Mobilization During the Paleocene‐Eocene Thermal Maximum

Hollingsworth,

Elling,

Badger

et al. 2024

Paleoceanog and Paleoclimatol

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“…Variability in OC petro MARs could also be attributed to changes in sea level during the PETM. Indeed, various studies have suggested marine transgression during the PETM, including: ACEX (Sluijs et al, 2006); ODP Site 1172 (Sluijs et al, 2011); Kheu River (Shcherbinina et al, 2016); the Atlantic Coastal Plain (John et al, 2008); and elsewhere (Jiang et al, 2023;Li et al, 2020 and references therein;Sluijs, Brinkhuis, et al, 2008 and references therein). However, although sea level rise is expected to reduce the supply of terrestrial organic carbon into the marine realm, this is rarely observed (e.g., Sluijs et al, 2014) and most PETM sites are characterized by enhanced terrigenous material during the PETM (Carmichael et al, 2017 and references therein).…”

Section: Climate Exerts Primary Control On Oc Petro Mobilization Duri...mentioning

confidence: 99%

Spatial and Temporal Patterns in Petrogenic Organic Carbon Mobilisation during the Paleocene-Eocene Thermal Maximum

Hollingsworth,

Elling,

Badger

et al. 2023

Preprint

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The Paleocene-Eocene Thermal Maximum (PETM) was a transient global warming event recognised in the geologic record by a prolonged negative carbon isotope excursion (CIE). The onset of the CIE was the result of a rapid influx of 13C-depleted carbon into the ocean-atmosphere system. However, the mechanisms required to sustain the negative CIE remains unclear. Previous studies have identified enhanced mobilisation of petrogenic organic carbon (OCpetro) and argued that this was likely oxidised, increasing atmospheric carbon dioxide (CO2) concentrations after the onset of the CIE. With existing evidence limited to the mid-latitudes and subtropics, we determine whether: (i) enhanced mobilisation and subsequent burial of OCpetro in marine sediments was a global phenomenon; and (ii) whether it occurred throughout the PETM. To achieve this, we utilised a lipid biomarker approach to trace and quantify OCpetro burial in a global compilation of PETM-aged shallow marine sites (n = 7, including five new sites). Our results confirm that OCpetro mass accumulation rates (MARs) increased within the subtropics and mid-latitudes during the PETM, consistent with evidence of higher physical erosion rates and intense episodic rainfall events. The high-latitude sites do not exhibit distinct changes in the organic carbon source during the PETM. This may be due to the more stable hydrological regime and/or additional controls. Crucially, we also demonstrate that OCpetro MARs remained elevated during the recovery phase of the PETM. Although OCpetro oxidation was likely an important positive feedback mechanism throughout the PETM, we show that this feedback was both spatially and temporally variable.

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“…The Eocene Kalataer Formation, which is widely exposed in the western Tarim Basin, represented the fourth marine transgression from Cretaceous to Paleongene and yielded abundant bivalve fossils (Figure 2B). Though Cretaceous to Paleongene Stratigraphy and sea-level history of the Tarim Basin have been studied in detail (Hao et al, 1982;Hao and Zeng, 1984;Mao and Norris, 1988;Tang et al, 1989;Guo, 1990;1995;Zhong, 1992;Jiang et al, 1995;Lan and Wei, 1995;Yang et al, 1995;Lan, 1997;Bosboom et al, 2011;Sun and Jiang, 2013;Wang et al, 2014;Jiang et al, 2018;Xi et al, 2020;Wang et al, 2022;Jiang et al, 2023), the biostratigraphy, paleoecology, and paleoenvironment of the Eocene Kalataer Formation is still unclear. This study mainly focuses on the Kalataer Formation in the Bashibulake Section in the western Tarim Basin, and a detailed analysis of microfacies, biostratigraphy, paleoecology, and sea-level change was carried out.…”

mentioning

confidence: 99%

The bivalve-bearing carbonate platform on the east Tethys during the middle Eocene and its response to the Tethys transgression

Fang,

Xi,

Sun

et al. 2024

Front. Earth Sci.

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The Eocene was a typical greenhouse climate period in the history of the Earth, with a high global sea level and extensive carbonate deposits developed in Tethys. During the Eocene, a carbonate platform was deposited in the western Tarim Basin, which belongs to the easternmost Tethys. However, the details of this carbonate platform and its complications for paleoecology and paleoclimate are still unclear. This research focuses on the bivalve-bearing carbonates of the Kalataer Formation in the western Tarim Basin, and detailed analyses of microfacies, biostratigraphy, paleoecology, and sea-level change were carried out. The bivalves of the Kalataer Formation are dominated by the Ostrea (Turkostrea) strictiplicata, Ostrea (Turkostrea) cizancourti, Ostrea (Turkostrea) strictiplicata, Ostrea (Turkostrea) strictiplicata, and Sokolowia buhsii, and the age is middle Lutetian of the Eocene. The biota of the Kalataer Formation mainly lives in open shallow sea environments, with medium to low energy and rich nutrients and oxygen, representing a typical shallow marine ecosystem of the carbonate platform. Microfacies and paleoecology indicate a large marine transgression event occurred in the western Tarim Basin during the middle Eocene.

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Eustatic change across the Paleocene-Eocene Thermal Maximum in the epicontinental Tarim seaway

Cited by 9 publications

References 93 publications

Spatial and Temporal Patterns in Petrogenic Organic Carbon Mobilization During the Paleocene‐Eocene Thermal Maximum

Spatial and Temporal Patterns in Petrogenic Organic Carbon Mobilization During the Paleocene‐Eocene Thermal Maximum

Spatial and Temporal Patterns in Petrogenic Organic Carbon Mobilisation during the Paleocene-Eocene Thermal Maximum

The bivalve-bearing carbonate platform on the east Tethys during the middle Eocene and its response to the Tethys transgression

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