Sr-Nd isotope geochemistry of eolian dust of the arid-semiarid areas in China: Implications for loess provenance and monsoon evolution

Rao, Wenbo; Jun, Yang; Chen, Jun; Li, Gaojun

doi:10.1007/s11434-006-2008-1

Cited by 53 publications

(27 citation statements)

References 62 publications

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“…6 and Table 2 show, Sr isotope ratio is the lowest in the bulk sample, middle in the 0.5 mol/L HOAc leaching residue of eolian deposit, and the highest in the 2.5 mol/L HCl leaching residue of <20 µm eolian deposit. This result is identical to our previous conclusions: the Sr isotope ratio of the eolian deposit increases as chemical weathering strengthens (Rao et al, 2006).…”

Section: Sr-nd Isotopes Of Eolian Sand In the Erdos Desertsupporting

confidence: 92%

“…6 and 7), and the variation of Nd isotope composition with grain size for the <75 µm sand in the Erdos desert (Fig. 4) is also different from that for eolian deposits in the central Loess Plateau (Rao et al, 2006). Therefore, the Erdos desert is not a main source area of eolian deposits in the western-central Loess Plateau.…”

Section: The Relationship In Materials Source Between the Erdos Desertmentioning

confidence: 87%

“…Some authors considered ε Nd (0) values of >-9.0 as a result of circum-Pacific volcano (Wang et al, 2007). Nd isotope ratios of eolian deposits in the Chinese Loess Plateau is independent of particle sorting and chemical weathering but only depends on its parent rocks (Rao et al, 2006). Thus, the small discrepancy among a multitude of ε Nd (0) values suggests that the eolian deposit in the western-central Loess Plateau has a nearly uniform source area.…”

Section: Sr-nd Isotopes Of Eolian Sand In the Erdos Desertmentioning

confidence: 99%

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Sr-Nd isotopic characteristics of eolian deposits in the Erdos Desert and Chinese Loess Plateau: Implications for their provenances

et al. 2008

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Material sources of the northern deserts and the Loess Plateau in China are always one of the critical focuses in Quaternary and paleoclimate fields. In this paper, the method of Sr-Nd isotope geochemistry is applied to explore the relationship in material source between the Erdos desert and Chinese Loess Plateau. The ε Nd (0) value of the <75 µm silicate fraction between -11.8 and -17.2 is more positive in the west than in the east, and its 87 Sr/ 86 Sr ratio varies from 0.719218 to 0.714824 without similar characteristics in the Erdos desert. In addition, there are Sr-Nd isotopic differences between different grain-size fractions of eolian sand in the Erdos desert. The coarse-grained fractions mainly originated from local parent rock weathering, but the fine-grained fractions were probably affected by the input of foreign materials. Geographical distribution of Sr-Nd isotopes (especially Nd isotopes) of <75 µm silicate fractions indicates that the input of foreign materials into the Erdos desert decreases gradually from its west to east. The ε Nd (0) (0) values of eolian silicate fractions in the western-central Loess Plateau mostly fall in a very narrow range of -9~-11.5, suggesting a uniform source region. However, there is a large Sr isotope variation resulting from different pretreating methods employed by researchers. The ε Nd (0) and 87 Sr/ 86 Sr values of eolian silicate fractions in the eastern Loess Plateau both change markedly. The differences in Sr-Nd isotopes of eolian silicate fractions between the eastern and western-central Loess Plateau indicate that there are different sources for eolian silicate materials in the two sub-areas. Sr-Nd isotopes, especially Nd isotopes of the <75 µm silicate fractions in the Erdos desert are clearly different from those of eolian silicate fractions in the western-central part, but roughly close to those of eolian silicate fractions in the eastern part of the Chinese Loess Plateau, which shows that the Erdos desert was perhaps a main source for the eastern Loess Plateau but not for the western-central Loess Plateau.

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Section: Sr-nd Isotopes Of Eolian Sand In the Erdos Desertsupporting

confidence: 92%

Section: The Relationship In Materials Source Between the Erdos Desertmentioning

confidence: 87%

Section: Sr-nd Isotopes Of Eolian Sand In the Erdos Desertmentioning

confidence: 99%

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Sr-Nd isotopic characteristics of eolian deposits in the Erdos Desert and Chinese Loess Plateau: Implications for their provenances

et al. 2008

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“…Jahn et al (2001), Ding et al (2001), andChen et al (2006) have used various geochemical indices and some trace element ratios to study paleoclimate reconstructions from eolian sediment based on the different geochemical properties of elements. Most indicators, however, are based on the assumption of homogeneous composition of the dust provenance (Rao et al, 2006).…”

Section: Provenance Of Dustmentioning

confidence: 99%

Heavy dust fall in Beijing, on April 16-17, 2006: Geochemical properties and indications of the dust provenance

Feng

Zhu

et al. 2008

Geochem. J.

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A heavy dust fell in Beijing on April [16][17] 2006. The dust storm formed in middle and western Inner Mongolia, China, under a strong Mongolian Cyclone. During the dust fall, the near-surface wind speed was insignificant in Beijing. The minimal wind speed at ground level indicates that the dust must have been transported by upper northwestern winds, and the local dust of Beijing contributed little to dust fall. The lack of a contribution from local dust differed from previous dust fall events in Beijing. Therefore, this dust fall provides good information on the dust source. Dust samples colleted during this event and Pleistocene loess samples from the Beijing area were analyzed for magnetic susceptibility, bulk particle and quartz grain size distributions, bulk particle and quartz micro-textures, mineralogy, carbonate content, major element concentrations, trace element and rare earth element (REE) concentrations, and the oxygen isotope composition of quartz. The results indicate the following. (1)

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“…The authors also deduce a general increase in deposition rates from 2.5 Ma to the present. Furthermore, in a more recent paper [66] He ratios on magnetic reversal boundaries of the loess-palaeosol sequence at Luochuan were analyzed as a proxy for interstellar dust particles mixed with terrigenous dust to various extents [67]. So far the database appears to be insufficient for further conclusions concerning chronostratigraphy or provenance.…”

Section: Methodsmentioning

confidence: 99%

New approaches to European loess: a stratigraphic and methodical review of the past decade

Zoeller

2010

Open Geosciences

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This review paper intends to summarize the state of the art in loess research at the first international "Loessfest'99" conference and to outline progress in loess research during the past decade. The focus is on loess as a terrestrial archive of climatic and environmental change during the Quaternary. The review highlights remarkable new results from regional investigations into European loess, as well as the emergence of new methods and refinements of established techniques, focussing on stratigraphy, dating and palaeoenvironment. It is concluded that loess research during the past decade not only has developed rapidly to take an outstanding place in Quaternary sciences, but also promises exciting perspectives for the next decade, in particular when combined approaches are applied to benefit from the now comprehensive pool of established and new methods.

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Sr-Nd isotope geochemistry of eolian dust of the arid-semiarid areas in China: Implications for loess provenance and monsoon evolution

Cited by 53 publications

References 62 publications

Sr-Nd isotopic characteristics of eolian deposits in the Erdos Desert and Chinese Loess Plateau: Implications for their provenances

Sr-Nd isotopic characteristics of eolian deposits in the Erdos Desert and Chinese Loess Plateau: Implications for their provenances

Heavy dust fall in Beijing, on April 16-17, 2006: Geochemical properties and indications of the dust provenance

New approaches to European loess: a stratigraphic and methodical review of the past decade

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