气候变化领域集成服务门户(CCPortal): Grain size distribution and sedimentology in volcanic mass-wasting flows: implications for propagation and mobility

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DOI	10.1007/s00531-020-01907-8
	Grain size distribution and sedimentology in volcanic mass-wasting flows: implications for propagation and mobility
	Makris S.; Manzella I.; Cole P.; Roverato M.
发表日期	2020
ISSN	14373254
起始页码	2679
结束页码	2695
卷号	109 期号:8
英文摘要	The sedimentological characteristics of mass-wasting flow deposits are important for assessing the differences between phenomena and their propagation and emplacement mechanisms. In the present study, nine volcanic debris avalanche deposits and eight lahar deposits are considered, from the literature. Their sedimentology is expressed in the descriptive statistics: median grain size, sand, gravel and finer particle fractions, skewness and sorting. Analysis of the data confirms that lahars and debris avalanches diverge in their grain size distribution and in their evolution during propagation. Water saturation in lahars is the main factor enabling debulking, a mechanism that is not recorded in the data derived from debris avalanches deposits. On the contrary, evidence of comminution of particles due to particle-particle interactions is observed in debris avalanches, and not in lahars. These findings support previous studies suggesting that although water content in debris avalanches plays a role in propagation, the effects of inertial collision of solid fragments are more important than fluid effects, confirming that particle-particle interactions are the main factor influencing the mobility of non-saturated mass wasting flows. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Debris avalanche; Grain size distribution; Lahar; Runout; Volcanic
语种	英语
scopus关键词	debris avalanche; grain size; lahar; mass wasting; sedimentology; size distribution; water content
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147608
作者单位	School of Geography, Earth and Environmental Science, University of Plymouth, Plymouth, United Kingdom; Department of Earth Sciences, University of Geneva, Geneva, Switzerland
推荐引用方式 GB/T 7714	Makris S.,Manzella I.,Cole P.,et al. Grain size distribution and sedimentology in volcanic mass-wasting flows: implications for propagation and mobility[J],2020,109(8).
APA	Makris S.,Manzella I.,Cole P.,&Roverato M..(2020).Grain size distribution and sedimentology in volcanic mass-wasting flows: implications for propagation and mobility.International Journal of Earth Sciences,109(8).
MLA	Makris S.,et al."Grain size distribution and sedimentology in volcanic mass-wasting flows: implications for propagation and mobility".International Journal of Earth Sciences 109.8(2020).