火山射气岩浆喷发研究新进展  

New Advances of the Research on Volcanic Phreatomagmatic Eruption

作　　者：孙谦[1] 樊祺诚[1] 李霓[1] 

机构地区：[1]中国地震局地质研究所,北京100029

出　　处：《矿物岩石地球化学通报》2007年第4期323-326,共4页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(40402010);地震科学联合基金资助项目(106046)

摘　　要：射气岩浆喷发是一种特殊类型的火山活动,水在这类火山活动中起着至关重要的作用,其喷发产物———低平火山口和基浪堆积物在中国乃至全世界都很常见。国际上对射气岩浆喷发的研究始于1921年。本文在前人研究基础上,以中国南方北部湾周边第四纪火山区大量射气岩浆喷发成因的低平火山口和基浪堆积物为研究对象,综合了近几年中国学者的研究成果,深入讨论了基浪堆积物的地质特征、射气岩浆喷发形成的基本条件、喷发过程的动力学机制,以及基浪流的搬运过程等重要问题,提出有待解决的难点,揭示了这类火山活动的特有属性。The phreatomagmatic eruption is an important and special type of volcanism in which water has played key role. It is characterized with water-related explosive eruption and subsequent base surge deposit and maar lakes both in China and in the rest of world. The research on the phreatomagmatic eruption started in 1921, with over 80 years. On the basis of previous researches, this paper has systematically discussed several important issues regarding the geological features, transportation and sedimentation model of the base surge deposit, the origin and basic condition for causing phreatomagmatic eruption, and dynamic mechanism of the phreatomagmatic eruption process, proposed some problems to be solved, and pointed out some special properties of this type of volcanism.

关 键 词：射气岩浆喷发 低平火山口 基浪堆积物 动力学机制 

分 类 号：P317.3[天文地球—固体地球物理学]