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	Formation and evolution of sand deserts in Xinjiang, Northwest China: I. Provenances of desert sands
	Zhu B. Q. ; Yu J. J. ; Qin X. G. ; Rioual P. ; Liu Z. T. ; Xiong H. G.
	2014
关键词	sandy desert provenance hydrodynamic and aeoliandynamic agents sediment transportation Xinjiang quaternary environmental-changes taklimakan desert taklamakan desert western china desertification pacific sediments moraines deposits dust
英文摘要	Sandy desert landscape is a geological product of arid climate and abundant sand materials supply in natural conditions, therefore the formation of sandy desert is an ideal studying object for understanding the interaction between various stratigraphic/epigenetic spheres of the earth system. However, until now, the knowledge about the provenance and formation of these deserts in Xinjiang, Central Asia is diverse and inconsistent, a systematic review is necessary. Ancient aeolian sand sediments in the internal areas of these deserts and their twin dust deposits in the Cenozoic strata surrounding the Xinjiang deserts are direct and indirect clues reflecting the provenance of sand materials and the formation and evolution of deserts. Based on the geochemical, mineralogical and isotopic evidences of desert sands and relevant deposits in the peripheral regions, this paper reviews the research progress on the development of the sandy deserts in Xinjiang, Northwest China. Many proofs proposed that desert sands in Xinjiang were mainly sourced from the ancient pluvial, alluvial and fluvial sediments and were eventually achieved because of the local sand supply. It pointed out that the settings of tectonic structure in Xinjiang had made sediments both in the Tarim Basin and the Junggar Basin being influenced greatly by regional hydrological system and aeolian processes originated from the planetary wind system of westerly, the East Asian winter monsoon and the topographical mountain-valley winds. However, the directions of transportation paths are different between the hydrological dynamics and the aeolian dynamics, which are decided by the slantwise structures of the basins tectonics and the regional atmospheric circulation routes, respectively, and have determined anisotropies of the transport pathway of these sediments delivered by different agents. This results in a geological cycle of detrital sediment transportation in the two large basins and thus largely increases the degree of sediment mixing, alternation and recycle between younger and older sediment sources, as well as the complexity and diversity of sand provenances.
出处	Journal of Geographical Sciences
卷	24
期	1
页	177-190
收录类别	SCI
语种	英语
ISSN号	1009-637X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29347]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhu B. Q.,Yu J. J.,Qin X. G.,et al. Formation and evolution of sand deserts in Xinjiang, Northwest China: I. Provenances of desert sands. 2014.

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