Aquatic Species Dominate Organic Matter in Qinghai Lake during the Holocene: Evidence from Eolian Deposits around the Lake

Fangming Zeng; Xiangjun Liu; Xiangzhong Li; Chongyi E

doi:10.1007/s12583-016-0926-X

Volume 28 Issue 3

Jun 2017

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Journal of Earth Science > 2017 > 28(3): 484-491.

Fangming Zeng, Xiangjun Liu, Xiangzhong Li, Chongyi E. Aquatic Species Dominate Organic Matter in Qinghai Lake during the Holocene: Evidence from Eolian Deposits around the Lake. Journal of Earth Science, 2017, 28(3): 484-491. doi: 10.1007/s12583-016-0926-X

Citation:

Fangming Zeng, Xiangjun Liu, Xiangzhong Li, Chongyi E. Aquatic Species Dominate Organic Matter in Qinghai Lake during the Holocene: Evidence from Eolian Deposits around the Lake. Journal of Earth Science, 2017, 28(3): 484-491. doi: 10.1007/s12583-016-0926-X

Citation:

Fangming Zeng, Xiangjun Liu, Xiangzhong Li, Chongyi E. Aquatic Species Dominate Organic Matter in Qinghai Lake during the Holocene: Evidence from Eolian Deposits around the Lake. Journal of Earth Science, 2017, 28(3): 484-491. doi: 10.1007/s12583-016-0926-X

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Aquatic Species Dominate Organic Matter in Qinghai Lake during the Holocene: Evidence from Eolian Deposits around the Lake

doi: 10.1007/s12583-016-0926-X

1.
Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes Chinese Academy of Sciences, Xining 810008, China
2.
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
3.
Key Laboratory of Physical Geography and Environmental Processes of Qinghai Province, Qinghai Normal University, Xining 810008, China

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Author Bio:
Fangming Zeng: http://orcid.org/0000-0001-8246-0665
Corresponding author: Fangming Zeng, fmzeng@163.com
Received Date: 30 Jun 2016
Accepted Date: 09 Oct 2016
Publish Date: 01 Jun 2017

Abstract

Abstract

Total organic carbon (TOC) in lake sediments and its stable carbon isotope (δ¹³C_org) are widely applied to investigate paleoenvironmental changes even though their implications are complicated and multi-explanatory. Organic geochemistry studies of lake sediments from Qinghai Lake have been investigated, but some interpretations are controversial. In this study, TOC of one Holocene eolian section and δ¹³C_org of three eolian sections were studied around Qinghai Lake. Results indicate that the TOC content in eolian deposits was low during the Early Holocene, and gradually increased to high values during the Middle and Late Holocene. The variation in TOC content of eolian deposits is different from that in the lacustrine sequence from Qinghai Lake during the Holocene. The δ¹³C_org values in the eolian sections were relatively stable, with oscillation amplitudes of ~4‰ (ranging from -25.8‰ to -22.1‰), in contrast to ~10‰ variations in δ¹³C_org values (varying from -30‰ to -20‰) in lacustrine sediments. Through comparison of TOC and δ¹³C_org values between eolian deposits and lacustrine sediments, we can confirm indications that the organic matter in Qinghai Lake sediments during the Holocene was primarily a contribution of the aquatic species in the lake. This is significant for understanding the origin of organic matter in lake sediments on the northeastern Qinghai-Tibetan Plateau and for paleoenvironmental inferences using such proxies.
- Qinghai Lake,
- total organic carbon (TOC),
- organic carbon isotope (δ¹³C_org),
- Qinghai-Tibetan Plateau

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References(40)

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Aquatic Species Dominate Organic Matter in Qinghai Lake during the Holocene: Evidence from Eolian Deposits around the Lake

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