位于扬子板块西缘的康滇地区是全球范围内一个重要的元古代铁铜多金属成矿带，但对成矿带内大多数矿床的成矿时代、矿床成因和成矿背景的认识目前还存在很大争议。本项目拟在前期工作基础上，选取大红山、迤纳厂和拉拉三个代表性铁铜矿床为研究对象，基于详细的野外地质调查和岩相学/矿相学观察，开展磁铁矿和硫化物等矿石矿物和磷灰石、榍石和褐帘石等伴生热液副矿物的微区原位元素分析，以及不同成矿阶段磷灰石Sr同位素、电气石B同位素以及硫化物硫同位素的原位分析，结合流体包裹体和稳定同位素的分析数据，全面揭示成矿物质和成矿流体的来源及演化。进一步对与磁铁矿和硫化物紧密共生的热液榍石和褐帘石等副矿物进行原位U-Th-Pb定年，精确限定这些铁铜矿床的形成时代，查明成矿作用与区域岩浆活动的联系，探讨成矿构造背景。通过与国际上同类型矿床的对比分析，系统阐明成矿作用机制和矿床成因，促进康滇铁铜成矿带成矿模型和成矿规律的研究。

Numerous Fe-Cu polymetallic deposits in the Kangdian region of the Western Yangtze Block form one of world's most important Proterozoic Fe-Cu metallogenic province. However, the mineralization ages, ore genesis, and geodynamic setting of these deposits have been highly debated. The proposed project will focus on textural and geochemical microanalysis of ore and hydrothermal accessory minerals from the Dahongshan, Yinachang, and Lala deposits. Ore minerals of magnetite and chalcopyrite as well as accessory minerals of apatite, titanite, and allanite will be analyzed by LA-ICPMS for elemental compositions. Sr isotope of apatite,B isotope of turmaline and in situ sulfur isotopes of sulfides will be analyzed by LA-MC-ICPMS or SIMS. These microanalytic data, in combination with textural analysis of ore and alteration minerals, data of fluid inclusions and stable isotopes, will provide significant insights into the sources of metals and ore-forming fluid, fluid eovlution of hydrothermal system,and hence the ore-forming mechanism. Hydrothermal titanite and allanite associated with magnetite and/or chalcopyrite will be dated using LA-ICPMS U-Th-Pb method. The new isotopic data will provide precise constraints on the mineralization ages and consequently the geodynamic setting of these deposits. Therefore, results of the proposed project will significantly promote the understanding of ore genesis of Fe-Cu deposits in the Kangdian region.