中文摘要：

联合1998～2004年的五期水准测量资料以及2002～2004年的GPS观测成果，分析了腾冲火山区岩浆的活动特征。垂直形变资料显示，火山区南部发生较明显下降，这可能是由岩浆和水的流失及放气等原因引起；水平形变资料显示，以固东一腾冲断裂（F2）的西支为界，断层两盘分别向东、西两个方向运动，断层活动表现出明显的拉张特征；综合分析表明，岩浆可能沿断层从南部向北部运移，并在断层内重新聚集形成岩墙；垂直形变的多个极值区以及水平位移的不规则性表明，火山区岩浆体不很规则或有多个岩浆囊体存在；从形变量大小分析，岩浆的活动量远小于中等程度火山喷发的质量，表明火山近期喷发的危险性较小。

英文摘要：

Based on the five terms of level surveys tiring 1998 - 2004 and the GPS observations dring 2002 - 2004 in the Tengchong volcano region, the magma activity characteristics in the volcano area were analyzed. The south part of the area had obvious descent, which might be caused by the running off of magma and underground water and the gas release. Taking the west branch of the Gudong-Tengchong fault （ F2 ） as boundary, the two sides move toward east and west horizontally, respectively, and show pull-apart trend obviously. From comprehensive analysis, it is possible that the magma moves from south to north along the fault and gathers again in the fault to form magma wall. Many maximum vertical deformation areas and irregular horizontal displace rates reveal there is an irregular magma body or many magma chambers. From the size of deformation, the quantity of motive magma is far smaller than that of a moderate volcano eruption, which shows the risk of volcano eruption is small at present.