1. Younger Dryas event recorded by the mirabilite deposition in Huahai lake, Hexi Corridor, NW China
- Author
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Wang, Nai’ang, Li, Zhuolun, Li, Yu, Cheng, Hongyi, and Huang, Rong
- Subjects
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SODIUM sulfate , *CARBON isotopes , *TEMPERATURE effect , *GEOCHEMISTRY , *CHRONOLOGY , *GEOLOGICAL formations - Abstract
Abstract: Deposits from the Huahai ancient lake in the Hexi Corridor were dated using conventional and AMS 14C. A 2500a “carbon storage effect” was defined at 9.25 m depth according to the 14C age difference between a plant macrofragment and detrital organic matter from the same layer. The chronology of this strata indicated that the mirabilite layer at the depth of 8.05 m–9.15 m had formed during the Younger Dryas (YD) event. The formation of the mirabilite layer indicated that the mean annual temperature in the Hexi Corridor dropped by 11 C° during the YD event compared with today. The lowest cold event occurred early in the YD, which is consistent with what has been revealed by other high-resolution records, such as those of Arctic ice cores and stalagmites in mid-latitude regions. [Copyright &y& Elsevier]
- Published
- 2012
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