摘要
Tongkengzhang molybdenum deposit is a newly discovered deposit,which is mainly hosted by the Cretaceous granitic porphyry. Based on mineral assemblage and vein crosscutting relationships, the ore-forming process could be divided into three mineralization-alteration stages. The study of fluid inclusions shows that early ore-forming fluids are high salinity magmatic fluids,containing alkalic components and volatile phase, which formed in condition of high pressure (~1 000 bar)and high temperature (550~>600 ℃), and were separated to multiphase high salinity fluid inclusions and lower salinity vapor-rich fluid inclusions by boiling. Meanwhile, the Laser Raman and SEM measurements detected Fe2O3, SO2 in the early fluids, indicating the early fluids were highly oxidized, the abundance of K-feldspar suggests alkalic environment.