Sedimentation of Particles of Varying Size and Density from Turbidity Currents Originating from Hot and Cold Grainflows and Suspension Dispersions

该项目的重点是观测喷发产生的密度流造成的水下火山沉积的动力学以及由此产生的沉积物的特征。 由于所讨论的过程几乎不可能在现场观察到，这里将采用另一种方法：使用实验室水槽进行实验，重现沉积物。 实验的目的是尽可能准确地模拟三种环境：a）新西兰陶波火山的湖相浊积岩，B）由limu碎片组成的海底透明碎屑岩和c）Pahvant Butte风格的喷发密度流。 结果将被用来扩展现有的浊流的数值模型的情况下，2-D和3-D电流充满了泡状颗粒的可变尺寸和密度，以及热水。 数值模型将为火山岩地层学的研究提供新的预测工具。这项研究是明尼苏达大学的加里帕克（浊流）和新西兰奥塔哥大学的詹姆斯白色（水下火山岩沉积）之间的合作成果。

The focus of the project is the observation of the dynamics of subaqueous volcaniclastic sedimentation from eruption-fed density currents, and the characteristics of the resulting deposits. Since the processes in question are almost impossible to observe in the field, an alternative approach will be employed here: the use of laboratory tanks to perform experiments that reproduce the deposits. The experiments have been designed to model as accurately as possible three settings: a) lacustrine turbidites of the Taupo volcano, New Zealand, b) submarine hyaloclastites consisting of limu shards and c) eruption-fed density currents of the style of Pahvant Butte. The results will be used to extend existing numerical models of turbidity currents to the case of 2-D and 3-D currents laden with vesiculated grains of variable size and density as well as hot water. The numerical models will provide new predictive tools for the study of volcaniclastic stratigraphy.This research represents a collaborative effort between Gary Parker of the University of Minnesota (turbidity currents) and James White of the University of Otago, New Zealand (subaqueous volcaniclastic deposits).