滇西腾冲地区广泛分布新生代火山岩，但其形成期次尚缺乏统一认识，同时该区火山岩的岩浆源区特征及其成因也存有争议！我们近年来致力于腾冲火山岩SHRIMP锆石U-Pb定年研究工作，在很多火山岩样品中分选出大量多源区、多成因的锆石，精确限定了4期火山岩形成时代（0.48 Ma、0.80 Ma、2.82 Ma和12.28 Ma）。本项目拟通过对一系列关键剖面开展系统的岩石学、岩相学、地球化学和SHRIMP锆石U-Pb定年、铀系不平衡定年研究，在国内率先建立 SHRIMP锆石U-Th定年方法，精确划分腾冲火山岩的活动期次；并通过对不同时代、不同成因锆石O-Hf同位素组成分析来探讨岩浆源区特征。本立项在国内将是一种技术方法的突破，同时对于进一步探讨岩浆房演化过程及壳幔相互作用有重要的科学意义。

The Tengchong area, which is located within the India-Eurasia collision zone, is the section of the Himalayan geothermal belt that contains widespread Cenozoic volcanism and earthquakes. Active magma is nowdays probably present in the magma chamber at shallow crustal level beneath the field. However, ages and origin of the Cenozoic volcanic rocks in Tengchong area are still controversial. .In recent years, our studies focused on petrology, geochemistry and zircon SHRIMP U-Pb dating of the volcanic rocks. Large amount of zircons with different sources and genesis have been separated from these rocks. Geochronology studies on typical volcanic zircons have precisely constrained four volcanic magma crystallization periods, namely ca. 0.48 Ma, 0.80 Ma, 2.82 Ma and 12.28 Ma, and suggested some earlier volcanic activities ca. 16.2 Ma and 21.6 Ma. .This study aims to precisely constrain the temporal-spatial distribution as well as promoting geochronology study on the young geological bodies by conducting systematic petrology, petrography, geochemistry, zircon SHRIMP U-Pb, U-Th dating and U series dating simultaneously. We’ll make further studies of in-situ texture and composition of certain minerals and P-T estimates especially on the Holocene volcanic rocks, trying to understanding the magma chamber process. Detailed O-Hf isotopic analyses on different kinds of zircon from these volcanic rocks will be carried out to investigate their origin. .The study will be significant for both technical methods and geological research of magma chamber process as well as crust-mantle interaction.