与华南毗邻的东南亚钨锡成矿带是一条世界级的成矿带，成矿主要与晚白垩世的岩浆作用有关，但相关研究较薄弱。对其开展详细研究不但有助于深入了解该成矿带的成岩成矿特征，也将为华南晚白垩世的成岩成矿作用研究及钨锡找矿突破提供借鉴。为此，本项目选取东南亚最具代表性的缅甸Hermyingyi石英脉型钨锡矿床为研究对象，在申请人前期对该矿床晚白垩世含矿花岗岩的研究基础上，进一步开展成矿年龄测定，并深入探究成矿流体来源及成矿机制。本项目拟采用真空击碎法对Hermyingyi矿床中矿石矿物黑钨矿的流体包裹体开展40Ar/39Ar定年，结合辉钼矿Re/Os和白云母40Ar/39Ar年龄，精确厘定矿床的成矿年龄；通过开展黑钨矿的流体包裹体红外显微测温分析并与共生的石英流体包裹体研究结果对比，提供客观可靠的成矿流体信息，结合石英的H-O同位素和花岗岩及硫化物的Pb同位素来示踪成矿流体及成矿物质来源，探讨成矿机制。

The SE Asian W-Sn belt, in the vicinity of South China, is a world-renowned metallogenic belt where widespread W-Sn mineralization are closely associated with the Late Cretaceous granitic magmatism that are distinctly differing from those took place in the Late Jurassic throughout South China. Despite much attention having been payed to South China, of equal importance with respect to W-Sn deposits in SE Asia are considerations of a bewildering range of mineralization age, sources of metals and properties of mineralizing fluids, which are not only crucial for elucidating genesis and time-space distribution of W-Sn deposits in SE Asia, but also beneficial to our exploration for Late Cretaceous W-Sn deposits in South China which are still scarce to date. Hermyingyi W-Sn deposit in Myanmar is typical of quart-vein type W-Sn deposits associated with the Late Cretaceous granitoid. Some geological knowledge have accumulated by previous research on geochronology and petrogeneis of ore-bearing granites, systematic studies regarding mineralization age, sources of mineralizing fluids as well as ore genesis remain to undertake. In this study, we wish to provide a precise geochronological constraint by direct dating fluid inclusions in wolframite using the 40Ar/39Ar technique by crushing in vacuo, combined with molybdenite Re/Os and muscovite 40Ar/39Ar ages. Infrared microthermometric studies of fluid inclusions in coexisting quartz and wolframite integrating with analysis of hydrogen and oxygen isotopes in fluid inclusions of quartz and lead isotopes of sulfides and feldspars in granites are also taken to obtain information on the sources of metals and mineralizing fluids and to gain further insight into the evolution of fluids and ore genesis.