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Oxygen isotope signatures of quartz from major Asian dust sources: Implications for changes in the provenance of Chinese loess
Yan, Y (Yan, Yan)[ 1,2 ]; Sun, YB (Sun, Youbin)[ 1,3 ]; Chen, HY (Chen, Hongyun)[ 4 ]; Ma, L (Ma, Long)[ 1,2 ]
2014-08-15
发表期刊GEOCHIMICA ET COSMOCHIMICA ACTA
卷号139页码:399-410
文章类型期刊论文
摘要

We present a systematic investigation of the oxygen isotopic composition of quartz in both fine and coarse fractions (<16 and 16-63 mu m) from major dust source regions in East Asia, including the Mongolian Gobi, the northern Chinese deserts, the Taklimakan desert, and the Qaidam Basin. The results demonstrate that the quartz oxygen isotope ratios of the Taklimakan desert and the Mongolian Gobi are more heterogeneous compared with the other areas. The quartz delta O-18 values of both the fine and coarse fractions from the various sources are overlapped to varying degrees, thus making it difficult to differentiate them. Nevertheless, the quartz delta O-18 values of both fractions exhibit an increasing trend from the Mongolian Gobi, to the northern Chinese deserts, and then to the Taklimakan desert. This implies that the geological settings of the source areas are different, which in turn results in differing contributions of high-temperature igneous rocks. The combination of quartz delta O-18 results with other quartz-based provenance tracers can clearly differentiate the three major source areas, i.e., the Taklimakan desert, the Mongolian Gobi, and the northern Chinese deserts. In addition, comparison of our results with previous delta O-18 measurements of fine-grained quartz from the Luochuan loess sequence suggests the likely glacial interglacial fluctuations in dust provenance. Finally, we suggest that the combination of quartz delta O-18 signatures and other dust provenance tracers can potentially improve the recognition of long-term fluctuations in the provenance of Chinese loess-red clay deposits.

DOI10.1016/j.gca.2014.04.043
收录类别SCI
语种英语
引用统计
被引频次:27[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9829
专题古环境研究室
通讯作者Yan, Y (Yan, Yan)[ 1,2 ]
作者单位1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, China;
4.The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050803, China
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Yan, Y ,Sun, YB ,Chen, HY ,et al. Oxygen isotope signatures of quartz from major Asian dust sources: Implications for changes in the provenance of Chinese loess[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2014,139:399-410.
APA Yan, Y ,Sun, YB ,Chen, HY ,&Ma, L .(2014).Oxygen isotope signatures of quartz from major Asian dust sources: Implications for changes in the provenance of Chinese loess.GEOCHIMICA ET COSMOCHIMICA ACTA,139,399-410.
MLA Yan, Y ,et al."Oxygen isotope signatures of quartz from major Asian dust sources: Implications for changes in the provenance of Chinese loess".GEOCHIMICA ET COSMOCHIMICA ACTA 139(2014):399-410.
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