New insights into the timing of the India – Asia collision from the Paleogene Quxia and Jialazi formations of the Xigaze forearc basin, South Tibet

Hu, Xiumian; Wang, Jiangang; BouDagher‐Fadel, Marcelle K.; Garzanti, Eduardo; An, Wenling

doi:10.1016/j.gr.2015.02.007

Cited by 131 publications

(99 citation statements)

References 88 publications

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“…Two distinct clastic sedimentary groups have been recognized along the Indus-Yarlung suture zone, on either side of the Indus-Yarlung ophiolite Davis et al, 2002;Ding et al, 2005;Fang et al, 2006;DeCelles et al, 2011). On the northern side, the sediments include the Paleocene Tso-jiangding deposits (Ding et al, 2005;Hu et al, 2015) and the Upper Oligocene-Miocene Gangrinboche Conglomerates DeCelles et al, 2011;Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Constraining the age of Liuqu Conglomerate, southern Tibet: Implications for evolution of the India–Asia collision zone

Kohn

Sandiford

et al. 2015

Earth and Planetary Science Letters

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Section: Introductionmentioning

confidence: 99%

Constraining the age of Liuqu Conglomerate, southern Tibet: Implications for evolution of the India–Asia collision zone

Kohn

Sandiford

et al. 2015

Earth and Planetary Science Letters

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“…This was probably not the case, and our estimate is likely overestimated. Nevertheless, it shows that oxidation of Neo-Tethyan marine C org may have contributed to the LPEE if collision occurred earlier than assumed in our model (e.g., Hu et al, 2015), to an extent that deserves to be quantified more accurately in future studies. In contrast to the LPEE, the rise in marine δ 13 C from 52.5 to 50 Ma suggests that the EECO was characterized by increased net organic carbon burial (as proposed by Komar et al (2013) with the methane hydrate hypothesis), or as we test in this paper, by the addition of excess CO 2 derived from one or several sources with heavier δ 13 C signatures.…”

Section: Organic Carbon Sourcesmentioning

confidence: 75%

“…Subduction below Tibet in the Early Cretaceous occurred simultaneously with Indian separation from eastern Antarctica and Australia ∼ 130 Ma ago (Guillot et al, 2008;van Hinsbergen et al, 2011a). Collision between the northernmost continental crust of the Indian plate and Eurasia is commonly stated to have started between ∼ 60 and ∼ 50 Ma (e.g., Dupont-Nivet et al, 2010;Najman et al, 2010;Orme et al, 2014;Hu et al, 2015) (Fig. 1).…”

Section: Neo-tethyan History and Related Arc Volcanismmentioning

confidence: 99%

Did high Neo-Tethys subduction rates contribute to early Cenozoic warming?

Hoareau¹,

Bomou²,

Hinsbergen³

et al. 2015

Clim. Past

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Abstract. The 58-51 Ma interval was characterized by a long-term increase of global temperatures (+4 to +6 • C) up to the Early Eocene Climate Optimum (EECO, 52.9-50.7 Ma), the warmest interval of the Cenozoic. It was recently suggested that sustained high atmospheric pCO 2 , controlling warm early Cenozoic climate, may have been released during Neo-Tethys closure through the subduction of large amounts of pelagic carbonates and their recycling as CO 2 at arc volcanoes. To analyze the impact of NeoTethys closure on early Cenozoic warming, we have modeled the volume of subducted sediments and the amount of CO 2 emitted along the northern Tethys margin. The impact of calculated CO 2 fluxes on global temperature during the early Cenozoic have then been tested using a climate carbon cycle model (GEOCLIM). We show that CO 2 production may have reached up to 1.55 × 10 18 mol Ma −1 specifically during the EECO, ∼ 4 to 37 % higher that the modern global volcanic CO 2 output, owing to a dramatic IndiaAsia plate convergence increase. The subduction of thick Greater Indian continental margin carbonate sediments at ∼ 55-50 Ma may also have led to additional CO 2 production of 3.35 × 10 18 mol Ma −1 during the EECO, making a total of 85 % of the global volcanic CO 2 outgassed. However, climate modeling demonstrates that timing of maximum CO 2 release only partially fits with the EECO, and that corresponding maximum pCO 2 values (750 ppm) and surface warming (+2 • C) do not reach values inferred from geochemical proxies, a result consistent with conclusions arising from modeling based on other published CO 2 fluxes. These results demonstrate that CO 2 derived from decarbonation of Neo-Tethyan lithosphere may have possibly contributed to, but certainly cannot account alone for early Cenozoic warming. Other commonly cited sources of excess CO 2 such as enhanced igneous province volcanism also appear to be up to 1 order of magnitude below fluxes required by the model to fit with proxy data of pCO 2 and temperature at that time. An alternate explanation may be that CO 2 consumption, a key parameter of the long-term atmospheric pCO 2 balance, may have been lower than suggested by modeling. These results call for a better calibration of early Cenozoic weathering rates.

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“…The "Letter Stages" subdivision of the Indo-Pacific Cenozoic (Leupold and van der Vlerk, 1931;Adams, 1970;Chapronière, 1984;BouDagher-Fadel and Banner, 1999;BouDagher-Fadel, 2008;Advocaat et al, 2014;Sun et al, 2015;Wang et al, 2015;An et al, 2015;BouDagher-Fadel et al, 2015;Hu et al, 2015;Li et al, 2016;BouDagherFadel et al, 2017) is based on larger foraminifera, some of which have also been used as range fossils in western hemisphere stratigraphy (Barker and Grimsdale, 1936;Caudri, 1996). In the Far East, where the Cenozoic sedimentary sequences are dominated by warm water, shallow marine carbonates, these deposits are largely biogenic in origin, primarily of benthic faunas and algae.…”

Section: The "Letter Stages" Of Se Asia and Provincial Biostratigraphymentioning

confidence: 99%

“…Further investigation of larger foraminifera will show if the foraminifera of the Levant demonstrate increasing divergence from those of the eastern part of Arabia and the Far East, and are shedding light on the Himalayan orogeny (e.g. Najman et al, 2010a, b;Najman et al, 2016;Hu et al, 2015).…”

Section: Epiloguementioning

confidence: 99%

Evolution and Geological Significance of Larger Benthic Foraminifera

2018

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New insights into the timing of the India – Asia collision from the Paleogene Quxia and Jialazi formations of the Xigaze forearc basin, South Tibet

Cited by 131 publications

References 88 publications

Constraining the age of Liuqu Conglomerate, southern Tibet: Implications for evolution of the India–Asia collision zone

Constraining the age of Liuqu Conglomerate, southern Tibet: Implications for evolution of the India–Asia collision zone

Did high Neo-Tethys subduction rates contribute to early Cenozoic warming?

Evolution and Geological Significance of Larger Benthic Foraminifera

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