Characteristics and LA-ICP-MS Zircon U-Pb Geochronology Study of Metallogenic Intrusion in the Xiaseling Tungsten Deposit in Lin'an, Zhejiang Province

The Xiaseling tungsten deposit is the largest discovered quartz-veined tungsten deposit in Zhejiang Province, which is closely related to Xiaseling Granite. The geochronological study on this granite has been very limited in previous studies. Fresh granite samples were collected from the Xiaseling tungsten deposit. The relationship between Xiaseling Granite and mineralization is discussed by mineralogy and geochemical characteristics of the rocks. The in-situ zircon U-Pb dating was performed with Laser Ablation-Multicollector Inductively Coupled Plasma-Mass Spectrometry (LA-MC-ICPMS) with higher accuracy and greater reliability than previously achieved. Our result indicates that the weighted average ²⁰⁶Pb/²³⁸U ages for zircons from the Xiaseling granite is (126.9±1.7) Ma, suggesting the granite was intruded in the early stage of the late Yenshanian Period of the early Cretaceous era. Together with regional prospecting findings, it is also important for ore exploration work in this area.