气候变化领域集成服务门户(CCPortal): Drainage reorganization and divide migration driven by basin subsidence: An example from the Micang Shan, outskirts of eastern Tibet and its implications for Cenozoic evolution of the Yangtze River

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DOI	10.1111/bre.12875
	Drainage reorganization and divide migration driven by basin subsidence: An example from the Micang Shan, outskirts of eastern Tibet and its implications for Cenozoic evolution of the Yangtze River
发表日期	2024
ISSN	0950-091X
EISSN	1365-2117
起始页码	36
结束页码	3
卷号	36 期号:3
英文摘要	The Cenozoic India-Asia collision has elevated the Tibetan Plateau and produced large strike-slip faults in the interior and margins of the plateau, which profoundly influenced drainage reorganization and divide migration in Asia. Recent studies have revealed that the drainage divides between the major rivers in and around the Tibetan Plateau have been migrating for tens of millions of years, due to tectonic and/or climatic disturbance or river capture events. Drainage-divide stability analysis can provide new, independent insights into the Cenozoic evolution of the river systems. In this study, we focus on the Hanzhong Basin and the adjacent Micang Shan (Shan means Mountain(s)) at the tail of the Qingchuan strike-slip fault in the outskirts of eastern Tibet. We investigated the stability of the Micang Shan drainage divide, which separates the Han and Jialing rivers (two major tributaries of the Yangtze River), using two methods-chi-plot and Gilbert metrics. The results show that most segments of the Micang Shan drainage divide are either moving south or stable. We further calculated the predicted stable divide location and identified the abandoned river channels and residual planation surfaces. Based on these analyses, we suggest that (1) the migration of the Micang Shan drainage divide is driven by the tectonic subsidence of the Hanzhong Basin; and (2) the upper reaches of the Han River flowed southward to the Sichuan Basin before basin subsidence. This study supports the hypothesis that the Palaeo-Middle Yangtze River and its tributaries primarily flowed southward. Moreover, the flow direction of the Middle Yangtze River has been, and still is, transitioning from southward to eastward. The change in river network flow direction is driven by regional block tilting towards the east, surface deformation from strike-slip faulting, regional extension east of the Tibetan Plateau and/or increased influence from the summer monsoon. The upper reaches of the Han River flowed southward to the Sichuan Basin before the subsidence of the Hanzhong Basin. Soon after the subsidence and synchronous uplift of the Micang Shan, the upstream tributaries of the Han River were captured by an east-flowing river, ultimately forming the modern Han River.image
英文关键词	basin subsidence; drainage reorganization; drainage-divide migration; eastern Tibet; Yangtze River
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001234375700001
来源期刊	BASIN RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/288507
作者单位	China Earthquake Administration; Chinese Academy of Sciences; Institute of Mountain Hazards & Environment, CAS; University of Houston System; University of Houston; Xinjiang University
推荐引用方式 GB/T 7714	. Drainage reorganization and divide migration driven by basin subsidence: An example from the Micang Shan, outskirts of eastern Tibet and its implications for Cenozoic evolution of the Yangtze River[J],2024,36(3).
APA	(2024).Drainage reorganization and divide migration driven by basin subsidence: An example from the Micang Shan, outskirts of eastern Tibet and its implications for Cenozoic evolution of the Yangtze River.BASIN RESEARCH,36(3).
MLA	"Drainage reorganization and divide migration driven by basin subsidence: An example from the Micang Shan, outskirts of eastern Tibet and its implications for Cenozoic evolution of the Yangtze River".BASIN RESEARCH 36.3(2024).

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