Sr-Nd-Pb Isotopic compositions of the Neogene Eolian Deposits in the Xining Basin and Implications for Their Dust Sources

Zeng, Fangming; Liang, Miaoling; Peng, Shuzhen; Yu, Dongmei; Su, Xiang

doi:10.1007/s12583-015-0575-2

Cited by 11 publications

(6 citation statements)

References 43 publications

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“…Many approaches have been used to determine the sediment provenance of Chinese loess, for example, isotopic (Sr, Nd, Pb) compositions (Gallet et al, 1996; Sun, 2002a, 2005; Rao et al, 2006; Chen et al, 2007; Sun and Zhu, 2010; Zeng et al, 2015), zircon U-Pb ages (Stevens et al, 2010, 2013; Che and Li, 2013; Fenn et al, 2017; Sun et al, 2018), mineralogical methods (Xie and Ding, 2007; Stevens et al, 2013; Wang et al, 2019), and chemical (major and trace elements) characteristics (Zhang et al, 1996; Gallet et al, 1998; Guan et al, 2008; Feng et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variations and implications of luminescence sensitivity of quartz grains on the Chinese Loess Plateau since the last interglaciation

Sun

2020

Quat. res.

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Although luminescence sensitivity of quartz grains of desert sands has been used in discriminating provenance, it still remains unclear about its spatiotemporal variations and climatic implications. In this paper, the luminescence sensitivity of quartz grains from the northern margin of the Chinese Loess Plateau (CLP) was studied using single-aliquot optically stimulated luminescence (OSL) and “pseudo” single-grain OSL measurements. Our results indicate that the OSL sensitivities have lower values in sand/loess beds and higher values in paleosols. We suggest that the variations in OSL sensitivity of quartz grains with depth on the CLP are mainly influenced by the origin of the quartz grains as they are related to the loess-sized material production processes and the migration of desert regions. More quartz grains of glacial origin with lower luminescence sensitivity, together with the reduced durations of irradiation and exposure cycles induced by shorter transport distance due to desert expansion, account for the lower luminescence sensitivity of glacial periods. Moreover, both the mountain processes and the retreat–advance of deserts are ultimately related to climatic changes, therefore, the orbital scale variations of luminescence sensitivity are controlled by glacial–interglacial oscillations on the CLP.

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Section: Introductionmentioning

confidence: 99%

Spatiotemporal variations and implications of luminescence sensitivity of quartz grains on the Chinese Loess Plateau since the last interglaciation

Sun

2020

Quat. res.

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“…Crustal residence ages (T DM ) may be calculated employing diverse models of depleted mantle evolution (Albarède & Brouxel, ; Ben Othman, Polvé, & Allègre, ; Blichert‐Toft & Albarède, ; DePaolo, ; Goldstein, O'Nions, & Hamilton, ; Liew & Hofmann, ; McCulloch, ; Su et al, ; Zeng, Liang, Peng, Yu, & Xiang, ). In this study, the T DM1 and T DM2 (representing single‐ and two‐stage Nd model ages, respectively) calculated according to the depleted mantle model of DePaolo () are presented in Table .…”

Section: Resultsmentioning

confidence: 99%

Geochemical and Sr‐Nd isotopic records of Paleoproterozoic metavolcanics and mafic intrusive rocks from the West African Craton: Evidence for petrogenesis and tectonic setting

Sakyi

Anum

et al. 2017

Geological Journal

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Metavolcanics and mafic intrusive rocks of the Paleoproterozoic Birimian terrane in the southeastern part of the West African Craton, Ghana, were analyzed for major and trace elements and Nd and Sr isotopic data to constrain the geodynamic evolution of the Birimian Supergroup. The metavolcanic rocks consist of metabasalts, meta‐andesites, and amphibolites, whereas the mafic intrusions are mainly gabbros, hornblendites, and dolerites. The rocks are tholeiitic in composition and show the classic features of arc magmatism. The metavolcanics display significant enrichments in large ion lithophile elements (LILE) and light rare earth elements, relative to high field strength elements (HFSE) and heavy rare earth elements. The multielement patterns of the rocks also show positive Pb, Ba, Th, and Sr and negative Nb, Ta, and Ce anomalies that are typical characteristics of subduction‐related magmas. They also have La/Nb ratios <3 and La/Ta ratios <43 that are similar to other Archean and Birimian greenstone belts in West Africa. The rocks have εNd (2.1 Ga) values of −0.96 to +2.60, and Nd model ages of 2.24–2.51 Ga (TDM1) and 2.16–2.45 Ga (TDM2), indicating their juvenile character with possible contributions from pre‐Birimian crustal materials in their sources. The εNd values suggest a depleted source and further indicate that they were probably produced in an almost entirely oceanic environment with minor influence from the continental crust. The Nd isotopic results are consistent with the island arc model, which views Paleoproterozoic terranes of the West African Craton in the context of subduction–accretion processes. Accordingly, these processes may have played a role in the formation of the Columbia supercontinent during the Paleoproterozoic (2.1–1.8 Ga) orogenic events.

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“…Given the small variations in the natural 143 Nd/ 144 Nd ratios, the measured values of the samples are generally expressed as units ɛ, where: ɛNd (0) = [( 143 Nd/ 144 Nd measured / 0.512638) -l] × 10 4 . The unit ɛ represents the deviation of the 143 Nd/ 144 Nd of the sample from the value of the Chondritic Uniform Reservoir (CHUR), the present value of which is estimated at 0.512638 (Zeng & al., 2015). Measurements of Sm and Nd concentrations as well as calculations of the isotopic ratios of Sm in the static mode were also carried out in order to validate the correlation between Sm and Nd.…”

Section: Methodsmentioning

confidence: 99%

Impacts of Deep Water Structuring on Seabed Pollution Levels: Evidence from Radiogenic Isotopes (Pb-Sr-Nd) in Surface Sediments Along the Reykjanes Ridge (Southern Iceland)

Karimou

Konaté

Ali

et al. 2019

ESJ

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Significant proportions of debris containing pollutants are present in remote and unknown areas of the deep seabed. Although identified amongst the top threats to marine ecosystem and human health, the mechanisms that particulate materials entered rapidly these deep ocean systems are still matter of debate. This study use depicting radiogenic isotopes (Sr, Nd, Pb) to question the relationship between the seabed sediment contamination levels and ambient stratification in the North Atlantic Ocean. On this basis, we studied sedimentary inputs and related mechanisms from more recent sequences collected at three locations representing different deep-sea hydrodynamics along the Reykjanes Ridge. Sm-Nd concentrations, as well as Sm-Nd-Sr-Pb isotopic compositions, were determined in digested and purified fraction of the sediment cores by Thermal Ionization Mass Spectrometry (TIMS). The Sm-Nd-Sr-Pb data simply reflect the scale of the perturbation of upper part (0-15 cm) of the sequences, which is much more pronounced in east flank than crossing and west bordering ridge areas. The Pb-Pb systematics show that the intensity of water mass mixing modulates degree of contamination and induced the modal transport of detrital major transport processes of pollutant downwards to the sediments are proposed: (i) sediments entrainment in the eastern flank and over ridge axis primarily dominated by vertical flux of particulates controlled by repackage and dislocation by strong mechanical mixing; and (ii) in the west flank, advection of abyssal waters, due to well-stratified mixing layer, provides particulates from the NEADW1 and DSOW.

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Sr-Nd-Pb Isotopic compositions of the Neogene Eolian Deposits in the Xining Basin and Implications for Their Dust Sources

Cited by 11 publications

References 43 publications

Spatiotemporal variations and implications of luminescence sensitivity of quartz grains on the Chinese Loess Plateau since the last interglaciation

Spatiotemporal variations and implications of luminescence sensitivity of quartz grains on the Chinese Loess Plateau since the last interglaciation

Geochemical and Sr‐Nd isotopic records of Paleoproterozoic metavolcanics and mafic intrusive rocks from the West African Craton: Evidence for petrogenesis and tectonic setting

Impacts of Deep Water Structuring on Seabed Pollution Levels: Evidence from Radiogenic Isotopes (Pb-Sr-Nd) in Surface Sediments Along the Reykjanes Ridge (Southern Iceland)

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