气候变化领域集成服务门户(CCPortal): Sand source and formation mechanism of riverine sand dunes: a case study in Xiangshui River, China

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DOI	10.1007/s40333-019-0102-x
	Sand source and formation mechanism of riverine sand dunes: a case study in Xiangshui River, China
	Wang, Yong; Yan, Ping; Han, Guang; Wu, Wei; Zhang, Run
通讯作者	Yan, P (通讯作者)
发表日期	2019
ISSN	1674-6767
EISSN	2194-7783
起始页码	525
结束页码	536
卷号	11 期号:4
英文摘要	Riverine sand dunes develop as a result of fluvial-aeolian interactions. The primarily barchan dune chains along the Xiangshui River (a branch of the Xar Moron River in the western part of the Horqin Sandy Land of China) form a typical riverine dune field. We collected a series of samples from the riverine sand dunes parallel to the direction of the prevailing wind and investigated the sand sources and formation mechanisms of these dunes by determining the grain size, heavy mineral content and optically stimulated luminescence (OSL) of the samples. The sand of the near-river dunes was coarser than the sand of the dunes distant from the river, indicating that coarse sand of the valley mainly deposited on near-river dunes. The heavy mineral analysis suggested that wind-sand activity levels were intense on the upwind dunes, but relatively weak on the downwind dunes. This indicated that the sand sources for the near-river dunes were more abundant than those of the distant dunes. Our OSL analysis of samples suggested that the deposition rates on dunes near the river were greater than the deposition rates on dunes distant from the river. The development of dunes along the river indicated that the river played an important role in dune formation and development. In addition, airflow fluctuation and the formation of the waveform dunes had a type of feedback relationship. Grain size, heavy mineral and OSL analyses are widely used methods in wind-sand research. Sand dune grain size characteristics reflect the effects of airflow on the transport and separation of sand materials, as well as the physical characteristics of the sand sources. Heavy mineral characteristics are often used to investigate the relationships between sediments and sand sources. OSL indicates dune age, revealing formation of dunes. Therefore, it is useful to explore dune sand sources, as well as the mechanisms underlying dune formation, by determining grain size, heavy mineral content and OSL. This study investigated the sand sources of riverine dunes and provided new information about riverine dune formation and development.
关键词	TENGGER DESERT COASTAL-PLAIN MODEL VARIABILITY VICINITY GEORGIA ORIGIN FIELD FLOW
英文关键词	riverine dune; grain size; heavy mineral; optically stimulated luminescence (OSL); Horqin Sandy Land
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000484954700004
来源期刊	JOURNAL OF ARID LAND
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259466
推荐引用方式 GB/T 7714	Wang, Yong,Yan, Ping,Han, Guang,et al. Sand source and formation mechanism of riverine sand dunes: a case study in Xiangshui River, China[J]. 中国科学院青藏高原研究所,2019,11(4).
APA	Wang, Yong,Yan, Ping,Han, Guang,Wu, Wei,&Zhang, Run.(2019).Sand source and formation mechanism of riverine sand dunes: a case study in Xiangshui River, China.JOURNAL OF ARID LAND,11(4).
MLA	Wang, Yong,et al."Sand source and formation mechanism of riverine sand dunes: a case study in Xiangshui River, China".JOURNAL OF ARID LAND 11.4(2019).