青海湖地区晚第四纪黄土的物质来源

曾方明

doi:10.3799/dqkx.2016.010

Volume 41 Issue 1

Jan. 2016

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Zeng Fangming, 2016. Provenance of the Late Quaternary Loess Deposit in the Qinghai Lake Region. Earth Science, 41(1): 131-138. doi: 10.3799/dqkx.2016.010

Citation:

Zeng Fangming, 2016. Provenance of the Late Quaternary Loess Deposit in the Qinghai Lake Region. Earth Science, 41(1): 131-138. doi: 10.3799/dqkx.2016.010

Zeng Fangming, 2016. Provenance of the Late Quaternary Loess Deposit in the Qinghai Lake Region. Earth Science, 41(1): 131-138. doi: 10.3799/dqkx.2016.010

Citation:

Zeng Fangming, 2016. Provenance of the Late Quaternary Loess Deposit in the Qinghai Lake Region. Earth Science, 41(1): 131-138. doi: 10.3799/dqkx.2016.010

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Provenance of the Late Quaternary Loess Deposit in the Qinghai Lake Region

doi: 10.3799/dqkx.2016.010

Zeng Fangming

Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China

Received Date: 2015-09-10
Publish Date: 2016-01-15

Abstract

Abstract

Late Quaternary loess deposit is widely distributed in the Qinghai Lake region and adjacent area. The loess deposit independently recorded the environmental and climatic changes during the late Quaternary in the Qinghai Lake region, northeastern Qinghai-Tibetan Plateau. Nearly all studies are focused on reconstructing the environmental and climatic changes recorded by loess deposit in the Qinghai Lake region. However, up to now, the provenance of the loess deposit in the Qinghai Lake region is still poorly understood. Here we present the elemental concentration of the silicate fraction of the eolian deposit ( < 75 μm) from the ZYC section in the Qinghai Lake region and LT section at Lintao County on the western Chinese Loess Plateau, loess deposits at Guanjiaoshan Mountain, Chaka town and Wulan County, eolian sands at western and eastern shore of the Qinghai Lake, and fluvial deposits from the Buhahe river and lacustrine deposits at Erlangjian site in the Qinghai Lake region. The results show that: (1) K₂O/Al₂O₃ (molar ratio) and Zr/Ti, Zr/Nb ratios indicate that the eolian deposits in the Qinghai Lake region and adjacent area can be distinguished clearly from the local deposits represented by river deposits at Buhahe river and lacustrine deposits at Erlangjian in the drainage basin of Qinghai Lake; (2) There is similarity of the elemental ratios (K₂O/Al₂O₃ and Zr/Ti, Zr/Nb) between the eolian deposits in the Qinghai Lake region and loess deposits at Lintao County. Thus, the eolian deposits in the Qinghai Lake region and Lintao County may have the same source region; (3) Late Quaternary loess deposit in the Qinghai Lake region is probably sourced from the Qaidam basin.
- Qinghai Lake,
- loess,
- provenance,
- elementary geochemistry

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References(55)

References

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Provenance of the Late Quaternary Loess Deposit in the Qinghai Lake Region

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