LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China

Among the marble-hosted ruby deposits in Himalayan tectonic belt, which yields highest-quality rubies world, Yuanjiang deposit is only economically viable one located China. More attempts are necessary to put constraints on ore-forming age of these deposits. Here, we dated rutile inclusions using LA-ICP-MS U–Pb method, yielded a lower intercept 206Pb/238U 20.2 ± 1.2 Ma Tera-Wasserburg plot, close 22.5–22.2 40Ar/39Ar ages phlogopite from host matrix assemblage. Our constraint cooling history deposit. The new consistent with our previous model that shows ca. 28–22 left lateral shearing plays an important role transporting toward surface. This study provides first example in-situ dating demonstrating great potential geochronology for Cenozoic mineral