长白山天池火山地质学研究的若干进展与灾害分析

通过以减轻火山灾害为目的的天池火山锥体顶部地区地质填图工作，发现了天池火山锥体附近不同期次火山泥石流，部分火山泥石流显示的高温定位特征指示了其与千年大喷发的成因联系。这些火山泥石流构成了严重的火山泥石流灾害，天池火山锥体近顶部大型滑坡体的发现则指示了天池火山另一种重要的灾害类型。滑坡体堆积物结构上可分为3种类型。天池火山千年大喷发时不同成分与物性的岩浆混合作用十分发育，指示了天池火山喷发前不同岩浆批的混合与共喷发机理。本文还论述了天池火山近代历史记录喷发物的分布与鉴别特征。

Some advances in the study of volcanic geology and a hazards analysis of Tianchi volcano

A number of different lahars were recognized during the systematic survey of a mapping project. The high setting temperature feature of the deposits indicates a relationship between the lahar and the Millennium eruption event of Tianchi volcano. The lahars caused serious disasters. Recognition of the huge avalanche scars and deposits around Tianchi volcano implies another highly destructive hazard. Three different structural types of the avalanche deposits have been recognized. There frequently existed magmatic mixing processes during the Millennium eruption of Tianchi volcano, indicating a mixing and co-eruption regime of the eruption. This paper has also discussed some features of the historically accounted eruptions.