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长白山火山是一座具有潜在喷发危险的大型近代活动火山,因此通过对该火山活动的监测,加强对长白山天池火山岩浆系统的研究并了解天池火山的活动性质是很有意义的.除了开展长白山火山活动历史、火山地层学、火山岩岩石学、年代学以及火山地质等研究之外,我国从20世纪80年代开始在该火山区域进行了一系列的地球物理探测活动.为深入了解长白山火山区岩浆的分布与活动特征,本文对前人工作进行总结,得到了关于长白山火山活动的以下几个方面的认识:1)通过火山区地震活动性监测得到了火山区的岩浆活动状态;2)利用大地电磁测深对火山区地下是否存在可能再次活动的岩浆囊及其分布形态进行监测,为火山喷发的危险性预测和灾害评价提供依据;3)利用人工源深地震测深对长白山天池及其邻域的结晶基底及地壳精细结构进行讨论;4)利用天然地震对火山区地壳、上地幔结构进行深入研究,分析了与火山区有关的深层动力学因素;5)对国外火山区重力监测实例的调研表明,重力监测对了解岩浆活动状态是十分有效的手段.多种地球物理方法的综合应用,获得了长白山火山地区地壳至地幔转换带的详细资料.
The Changbai Mountain volcano is a large volcanic activity with potential danger of eruption. Therefore, it is significant to strengthen the research on the volcanic magma system in Tianchi volcano and to understand the nature of the volcanic activity in Tianchi volcano through monitoring the volcanic activity.In addition to carrying out Changbai volcanic activity History, volcanic stratigraphy, volcanic petrology, geochronology and volcanic geology, a series of geophysical exploration activities have been carried out in this volcanic area since the 1980s in our country. In order to know more about the distribution of magma in the volcanic area of Changbai Mountain And activity characteristics, this paper summarizes the work of predecessors, and obtains the recognition of the following aspects of volcanic activity in Changbai Mountain: 1) The magma activity status in the volcanic area is obtained through seismicity monitoring in the volcanic area; 2) Deep monitoring of the existence and reactivation of magma pockets and their distribution patterns in the volcanic area can provide the basis for the risk prediction and disaster evaluation of volcanic eruptions. (3) Using artificial source deep seismic sounding to measure the crystallization of Tianchi Lake and its adjacent area Basement and crustal fine structure are discussed; 4) The use of natural earthquakes on fire The regional crust and the upper mantle structure are studied deeply and the deep dynamics factors related to the volcanic area are analyzed.5) Investigation of gravity monitoring examples in volcanic areas abroad shows that gravity monitoring is a very effective means to understand the state of magma activity. Geophysical methods of the comprehensive application, access to the Changbai Mountain volcanic crust to mantle conversion zone details.