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Lacustrine strata sedimentology and lake-level
history in ancient Zhuyeze Lake since the Last Deglaciation
- ZHAO Qiang1, WANG Nai‘ang2, LI Xiumei3
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1.Centre for East Asian Archaeological Studies, Shandong University;School of City and Development, University of Jinan; 2.School of Resources and Environment, Lanzhou University; 3.School of City and Development, University of Jinan
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Published |
05 Jun 2008 |
Issue Date |
05 Jun 2008 |
Abstract
The ancient Zhuyeze Lake lies in the east Hexi corridor of Northwest China and it is the interacting belt of the East Asian summer monsoon and the westerly line. The research on paleoclimate of the lake facilitates the understanding of the processes and mechanism of climate change in Northwest China since the Last Deglaciation. Related researches of this area started in the 1960s, and the research on environment changes has become the “hotspot” during the last 10 years. This paper focuses on four sections (Qingtuhu Section, Xiqu Section, Shakengjing Section, Jiutuoliang Section) in ancient Zhuyeze Lake. Much work was done in spot investigation, section strata comparison, geophysical analyses, geochemical analyses and dependable 14C dating in order to retrieve the dry-wet history of climate changes in ancient Zhuyeze Lake since the Last Deglaciation. The main conclusions are as follows: (1) the highest terminal lake level was 1313–1315 m. In Holocene, the highest lake level was 1308–1309 m occurring between 6700–5800 a B.P.. (2) After geophysical and geochemical analyses, high-resolution records of the climate change since the Last Deglaciation were revealed as follows: cold and dry during 15800–13000 a B.P.; cool and wet during 13000–9500 a B.P.; warm and dry during 9500–6700 a B.P.; warm and wet during 6700–4300 a B.P.; cool and wet during 4300–2700 a B.P.; and at last dry during 2700–0 a B.P..
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ZHAO Qiang, WANG Nai‘ang, LI Xiumei.
Lacustrine strata sedimentology and lake-level
history in ancient Zhuyeze Lake since the Last Deglaciation. Front. Earth Sci., 2008, 2(2): 199‒208 https://doi.org/10.1007/s11707-008-0031-z
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