右江盆地是目前除美国内华达地区以外全球最大的卡林型金矿矿集区，由于缺乏合适的定年矿物，这类矿床的成矿时代一直存在较大争议。该区卡林型金矿床中普遍发育与金矿体时空关系密切的沥青，这为通过沥青Re-Os定年来限定金成矿时代提供了极好的条件。本项目拟选取右江盆地赋存于台地相区以“层控型”矿化为主的水银洞金矿床和赋存于盆地相区以“断控型”矿化为主的高龙金矿床为研究对象，通过详细的野外地质调查、矿物学、元素地球化学和拉曼光谱分析，查明金矿床中沥青的产状分布、矿物共生关系、主微量元素组成和拉曼光谱特征，识别和分选出与成矿作用相关的沥青，在此基础上开展沥青的Re-Os等时线定年，以准确限定金矿床的形成时代。最后结合区域地质、地球化学和年代学资料，进一步探讨该区卡林型金矿床成矿地球动力学背景。预期成果不仅有助于补充和完善右江盆地卡林型金矿床的年代学框架，而且为卡林型金矿床成矿年代学研究提供新的思路和借鉴。

Carlin-type gold deposits in the Youjiang basin represent the world’s largest concentrations of this type deposits outside Nevada. Due to the lack of suitable minerals that are unequivocally associated with gold precipitation, the ages for mineralization remain undetermined. Organic matter such as bitumen is commonly present as a migrated hydrocarbon product in high grade ore of Carlin-type gold deposits, providing an optimal candidate for Re-Os isochron dating to constrain the time of gold mineralization. This proposed research involves detailed field observations and intensive investigation on the mineralogy, geochemistry, and raman spectroscopy to identify the ore-related bitumen from the typical strata-bound Shuiyindong deposit in platform facies area and the typical fault-controlled Gaolong deposit in basinal facies area for Re-Os isochron dating of bitumen to precisely constrain the timing of gold mineralization. These results, combined with the regional geology, geochemistry, and geochronology data of the gold deposits in and around the Youjiang basin, are used to provide new insights into geodynamic setting under which the Carlin-type gold deposits formed. The expected results are not only helpful to complete the age framework of Carlin-type gold deposits in the Youjiang basin, but also provide new approach to date Carlin-type gold genesis elsewhere.