Degassing and Crystallization of Anorthoclase Phonolite Magma, Mt. Erebus, Antarctica

埃里伯斯山有一个持久的对流斜长石phonolite熔岩湖。这个湖是一个管道的顶部，在深处与一个主要的岩浆库相连。本次调查的主要目的是继续监测埃里伯斯火山的火山活动，并了解斜长石型空泡岩岩浆的脱气和结晶过程。埃里伯斯火山是向南极大气排放火山排放物的主要来源。这项研究将使用相关光谱仪确定SO排放率，以估计埃里伯斯火山对南极大气的贡献，并监测和了解熔岩湖的脱气行为。挥发性酸性气体和痕量金属将通过使用颗粒和处理过的过滤包从火山口边缘取样来收集。当与SO数据结合后，便可对其他元素的排放率作出定量估计。

Mount Erebus contains a persistent convecting anorthoclase phonolite lava lake. The lake is the top of a conduit which is connected at depth to a major magma chamber. The major objectives of this investigation are to continue surveillance of the volcanic activity of Mount Erebus and to obtain an under- standing of the degassing and crystallization of the anorthoclase phonolite magma. Mt. Erebus is the main source of volcanic emissions to the Antarctic atmosphere. This investigation will determine SO emission rates using a correlation spectrometer to estimate the contribution of Mt. Erebus to the Antarctic atmosphere and to monitor and understand the degassing behavior of the lava lake. Volatile acid gases and trace metals will be collected by sampling the plume from the crater rim using the particle and treated filter pack. When combined with the SO data, quantitive estimates of the emission rates of other elements will be made.