Abstract: Abstract: The Jiama coppermultimetal deposit in Tibet lies in the eastern part of the Gangdisi metallogenic belt. It belongs to superlarge porphyryskarn type deposit and has great potential for mineralization. The mineralization in the mining area is controlled by the NS normal fault, which offer the space for metallic element enrichment and magmatic hydrothermal rise. In this paper, LAICPMS zircon UPb dating was used to study the porphyry and skarn age. The dating results show that the diagenesis and mineralization age of the mining area is 14-16 Ma, and the ESR dating results show that the quartz veins age is 139-164 Ma, the calcite veins age is 5-7 Ma. The dating results show that the diagenesis and the metallogenesis are both in the Miocene period, in the later period, there are still weak metallogenesis in Jiama deposit influenced by tectonic movement.

Key words: Jiama deposit, zircon UPb dating, ESR dating, Miocene, Tibet