Paleoenvironmental evolution of South Asia and its link to Himalayan uplift and climatic change since the late Eocene

Song, Zehua; Wan, Shiming; Colin, Christophe; Yu, Zhaojie; Révillon, Sidonie; Jin, Huijuan; Zhang, Jin; Zhao, Debo; Shi, Xuefa; Li, Anchun

doi:10.1016/j.gloplacha.2021.103459

Cited by 19 publications

(16 citation statements)

References 131 publications

(215 reference statements)

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“…Frontiers in Earth Science | www.frontiersin.org February 2022 | Volume 10 | Article 824404 Yang et al, 2021b;Song et al, 2021). The gradual increase in basin sedimentation flux of basin in Central Asia (Figure 2C, Métivier et al, 1999) and in the Qaidam Basin (Figure 2D, Bao et al, 2017) since the late Oligocene-early Miocene thus implies an enhanced regional erosion.…”

Section: Reliability Of Clay Mineral Assemblages As a Silicate Weathe...mentioning

confidence: 95%

Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

Yang

Han

et al. 2022

Front. Earth Sci.

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The relationship between silicate weathering, Tibetan Plateau uplift, and global cooling during the Cenozoic provides a valuable case study for understanding the interaction of tectonics and climate. The Tibetan Plateau uplift is considered to have caused Cenozoic cooling via the atmospheric CO2 drawdown by increased silicate weathering. However, this hypothesis has been intensively debated over the past few decades due to the lack of complete silicate weathering records from the continental interior, which can directly track the effects of uplift on weathering. We provide the first complete long (past 53 Myr) continental silicate weathering record from the NE Tibetan Plateau, combined with a comprehensive analysis on its evolution pattern, critical transitions, and associated driving forces. The silicate weathering intensity in NE Tibet is characterized by a long-term Paleogene decrease, modulated by global cooling, and a Neogene increase that may be related to the East Asian summer monsoon (EASM) intensification. Three major system transitions in regional silicate weathering are identified at ∼26–23 Ma, ∼16 Ma and ∼8 Ma, which are linked to enhanced EASM forced primarily by tectonic uplift at these intervals, with some surbordinate influences from global climate at ∼16 Ma. We also capture an intensification of the 100-kyr cycle at ∼16 Ma and ∼8 Ma in the obtained silicate weathering record, which is in coincidence in time with the enhancement of the EASM. This might suggest some contribution of the Antarctic ice sheets on modulating the regional silicate weathering in the NE Tibetan Plateau on a timescale of 105–106 years, through its influences on the EASM as proposed by previous studies.

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Section: Reliability Of Clay Mineral Assemblages As a Silicate Weathe...mentioning

confidence: 95%

Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

Yang

Han

et al. 2022

Front. Earth Sci.

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“…The large differences in values are a result of the different sample locations and sediment contributions to the Bengal Fan and the Ninetyeast Ridge. Also, note that Song et al (2021) did not treat samples specifically to remove authigenic oxides, possibly explaining the difference in Sr isotopes between studies while the Nd isotopes are similar. The error bars represent the 2 s.d.…”

Section: Step Change In Nd and Pb Isotope Compositions At ∼73 Mamentioning

confidence: 99%

“…Evolution of U1443 clay radiogenic Sr and Nd isotope compositions compared to other studies from nearby in the Bay of Bengal. The records ofAli et al (2021) andSong et al (2021) are on the same scale as the U1443 data, while the records ofGaly et al (2010) andDerry and France-Lanord (1996) are displayed on a larger scale. The large differences in values are a result of the different sample locations and sediment contributions to the Bengal Fan and the Ninetyeast Ridge.…”

mentioning

confidence: 99%

Enhanced Late Miocene Chemical Weathering and Altered Precipitation Patterns in the Watersheds of the Bay of Bengal Recorded by Detrital Clay Radiogenic Isotopes

Bretschneider

Hathorne

Bolton

et al. 2021

Paleoceanog and Paleoclimatol

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“…1). According to the sediment composition, clay minerals, and Nd and Sr isotope data of the Bay of Bengal and ODP 758, the detrital sediments reaching ODP 758 are predominantly from the Ganges-Brahmaputra river system with a significant input from the Irrawaddy-Salween river system (Colin et al 1999;Joussain et al 2016;Ali et al 2021;Song et al 2021). The latter may increase (1) in the summer monsoon season when the Andaman Sea is flooded (Zahirovic et al 2016;Ali et al 2021) and ( 2) in the inter-monsoon season when the southward flow from the Andaman Sea to the Ninetyeast Ridge at intermediate to deep depths increases (Liao et al 2020).…”

Section: Regional Settingmentioning

confidence: 99%

“…In addition to input from the Ganges-Brahmaputra, SK 129 (Chagos-Laccadive Ridge) receives detrital (non-radiogenic) input from peninsular rivers discharging into the western Bay of Bengal, which decreases drastically when the summer monsoon is weaker (Suresh and Bagati 1998) as occurs during glacial periods (Zhisheng et al 2011). Detrital input from the Ganges-Brahmaputra river system has a significant abundance in the Ninetyeast Ridge (Ali et al 2021;Song et al 2021) and is a factor that can provide non-radiogenic ε Nd (~ − 16.1; Colin et al 1999;Robinson et al 2007). The Ninetyeast Ridge (HI1808-GPC04 and ODP 758) receives sediment input from the Irrawaddy-Salween river via the Andaman Sea, in addition to input from the Ganges-Brahmaputra river.…”

Section: The New ε Nd Record Of Hi1808-gpc04 and Comparison With Odp 758 And Sk 129mentioning

confidence: 99%

Deep-Water Circulation over the Last Two Glacial Cycles Reconstructed from Authigenic Neodymium Isotopes in the Equatorial Indian Ocean (Core HI1808-GPC04)

et al. 2021

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We reconstructed the past deep-water character of the equatorial Indian Ocean using the isotope ratio of neodymium (εNd) in the Fe–Mn coating of mixed-species foraminifera. When compared with previous εNd records at the same site (ODP 758) and at another site to the west (SK 129), the three datasets were consistent and showed glacial-interglacial variations, even though the other two records were extracted from different media (cleaned foraminifera and bulk sediment leach). This confirms that while the foraminiferal coating is the preferred medium for reconstructing past bottom water εNd records, for carbonate-dominated lithologies, weak acid extraction of bulk sediment is also a viable option offering high-resolution capabilities. When the lithology includes volcanic particles or high organics, the extraction protocol may need to be adjusted to guard against detrital contamination or a slight correction may need to be applied. During glacials, the deep waters bathing the equatorial Indian Ocean had a larger AABW component and during interglacials a larger NADW component. Our HI1808-GPC04 record supplements the ODP 758 record in the interval with prominent AABW signal (MIS 6/5 transition and MIS 7) and reveals regional effects in some non-radiogenic intervals. The smaller differences between the HI1808-GPC04/ODP 758 and SK 129 records seem to reflect regional Nd input from river systems and non-radiogenic Nd from the boundaries.

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Paleoenvironmental evolution of South Asia and its link to Himalayan uplift and climatic change since the late Eocene

Cited by 19 publications

References 131 publications

Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

Enhanced Late Miocene Chemical Weathering and Altered Precipitation Patterns in the Watersheds of the Bay of Bengal Recorded by Detrital Clay Radiogenic Isotopes

Deep-Water Circulation over the Last Two Glacial Cycles Reconstructed from Authigenic Neodymium Isotopes in the Equatorial Indian Ocean (Core HI1808-GPC04)

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