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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Relating the physical properties of volcanic rocks to the characteristics of ash generated by experimental abrasion
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Relating the physical properties of volcanic rocks to the characteristics of ash generated by experimental abrasion

机译:将火山岩的物理性质与实验磨损产生的灰分特性联系起来

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Interactions between clasts in pyroclastic density currents (PDCs) generate volcanic ash that can be dispersed to the atmosphere in co-PDC plumes, and due to its small size, is far-travelled. We designed a series of experiments to determine the effects of pyroclast vesicularity and crystal content on the efficiency and type of ash generated by abrasion. Two different pyroclastic materials were used: (1) basaltic-andesite pyroclasts from Fuego volcano (Guatemala) with similar to 26-46% vesicularity and high groundmass crystallinity and (2) tephri-phonolite Avellino pumice (Vesuvius, Italy) with similar to 55-75% vesicularity and low groundmass crystallinity.
机译:火山碎屑密度流(PDC)中的碎屑之间的相互作用会产生火山灰,这些火山灰可以通过co-PDC羽流散布到大气中,并且由于其体积小,因此很不容易。我们设计了一系列实验来确定火山灰的水泡度和晶体含量对磨损产生的灰分的效率和类型的影响。使用了两种不同的火山碎屑材料:(1)来自Fuego火山(危地马拉)的玄武岩-安山岩火山碎屑具有相似的26-46%的泡状性和较高的地层结晶度,以及(2)斜方沸石-Avellino浮石(意大利维苏威火山),其类似于55 -75%的水泡度和低的地面结晶度。

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