Characteristics and dynamics of the Ganqiuchi rock avalanche triggered by a paleo-earthquake in the Northern Qinling Mountains

doi:10.1016/j.palaeo.2020.109881

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2020 > Vol17 No.5

	Characteristics and dynamics of the Ganqiuchi rock avalanche triggered by a paleo-earthquake in the Northern Qinling Mountains
	Zhou, Ze-Hua; Lyu, Yan; Su, Sheng-rui; Liu, Shi-jie; Zhao, Hui; Li, Peng; Zhou, Yang
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2020
卷号	17 期号:5 页码:109881
关键词	Ganqiuchi rock avalanche Deposit block size distribution Fragmentation Discrete element method Rock avalanche dynamics
ISSN号	1672-6316
DOI	10.1016/j.palaeo.2020.109881
文献子类	Article
英文摘要	Analyzing large prehistoric rock avalanches provides significant data for evaluating the disaster posed by these relatively infrequent but destructive geological events. This paper attempts to study the characteristics and dynamics of the Ganqiuchi granitic rock avalanche, in the middle of the northern margin of Qinling Mountains, 30 km to the south of Xi'an, Shaanxi Province, China. In plane view, this rock avalanche is characterized by source area, accumulation area and dammed lake area. Based on previous studies, historical records and regional geological data, the major trigger of the Ganqiuchi rock avalanche is considered to be a strong paleo-earthquake with tremendous energy. The in situ deposit block size distributions of the intact rock mass and the debris deposits are presented and analyzed by using a simple model for estimating the number of fragmentation cycles that the blocks underwent. The results show that the primary controlling factor of the fragmentation process is the pre-existing fractures, and there is a relationship between the potential energy and the fragmentation energy: the latter is approximately 20% of the former. Based on the dynamic discrete element technique, the study proposes a four-stage model for the dynamic course of the Ganqiuchi rock avalanche: (1) failing; (2) highspeed sliding; (3) collision with obstacles; (4) decelerated sliding, which has implication for hazard assessment of the potential rock avalanches in China and other countries with similar geological setting.
电子版国际标准刊号	1872-616X
语种	英语
WOS记录号	WOS:000561370700014
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46821]
专题	Journal of Mountain Science_Journal of Mountain Science-2020_Vol17 No.5
推荐引用方式 GB/T 7714	Zhou, Ze-Hua,Lyu, Yan,Su, Sheng-rui,et al. Characteristics and dynamics of the Ganqiuchi rock avalanche triggered by a paleo-earthquake in the Northern Qinling Mountains[J]. JOURNAL OF MOUNTAIN SCIENCE,2020,17(5):109881.
APA	Zhou, Ze-Hua.,Lyu, Yan.,Su, Sheng-rui.,Liu, Shi-jie.,Zhao, Hui.,...&Zhou, Yang.(2020).Characteristics and dynamics of the Ganqiuchi rock avalanche triggered by a paleo-earthquake in the Northern Qinling Mountains.JOURNAL OF MOUNTAIN SCIENCE,17(5),109881.
MLA	Zhou, Ze-Hua,et al."Characteristics and dynamics of the Ganqiuchi rock avalanche triggered by a paleo-earthquake in the Northern Qinling Mountains".JOURNAL OF MOUNTAIN SCIENCE 17.5(2020):109881.