Particle endmembers characteristics of Amiola-South profile in the Zoige Basin and recorded climate change since 15 ka BP
Received date: 2024-10-24
Revised date: 2024-11-18
Online published: 2025-03-26
In this study， we selected the loess-paleosoil sequence from Amiola-South profile in Maqu County to analyze its grain size， and combined with magnetic susceptibility and Rb/Sr， in an attempt to reveal the sedimentological and kinetic characteristics of typical profile sediments and their relationship with climate evolution. The results showed that： （1） The particle size was divided into five terminal components： EM1 is the fine particulate matter transported by suspension and the clay particles produced by soil formation； EM2 is the effect of wind on the transport of floodplain materials in warm and humid climates. EM3 is the sand carried by the westerly and East Asian winter winds； EM4 is coarse particulate matter transported from near-source areas by severe sandstorms or strong winter winds； and EM5 is the lakeside setting of the ancient Zoige lake. （2） In the area of Amiola Mountain， due to the retreat of the water of the ancient Zoige lake， the land was exposed around 15.5 ka BP and began to accept stable wind and dust accumulation， 15.5-8.5 ka BP was cold and dry， 8.5-3.0 ka BP turned warm and wet， and 3.0 ka BP turned dry and cold so far. Wavelet analysis shows that the East Asian monsoon has a main cycle of 5.6 ka and a sub-cycle cycle of 2.1 ka and 3.5 ka.
Ying Zhai , Jiangli Pang , Chunchang Huang , Xiaochun Zha , Yali Zhou , Yuqin Li , Yuzhu Zhang , Xueqing Sun , Xiaokang Zhao . Particle endmembers characteristics of Amiola-South profile in the Zoige Basin and recorded climate change since 15 ka BP[J]. Journal of Desert Research, 2025 , 45(2) : 111 -118 . DOI: 10.7522/j.issn.1000-694X.2024.00162
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