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上房斑岩钼矿床与燕山期花岗斑岩有关。成矿流体研究表明包裹体均一温度介于100℃～383℃之间,成矿阶段温度为240℃～330℃;成矿流体盐度介于28.61wt%～36wt%NaCl之间,成矿阶段盐度为30.51wt%～34wt%NaCl;成矿流体中富Na、F而贫K、Cl。氢、氧同位素研究表明,δD为-90.50‰～-41.00‰,δ18O为9.45‰～13.04‰;稳定同位素值表明上房钼矿成矿物质早期以岩浆热液为主,晚期有大量雨水注入。
The Shangfang porphyry molybdenum deposit is related to the Yanshanian granite porphyry. The study of ore-forming fluid shows that the homogenization temperature of inclusions is between 100 ℃ and 383 ℃ and the temperature of mineralization stage is between 240 ℃ and 330 ℃. The salinity of ore-forming fluid is between 28.61wt% and 36wt% NaCl, The salinity is 30.51wt% ~ 34wt% NaCl. The ore-forming fluid is rich in Na, F and poor K, Cl. Hydrogen and oxygen isotope studies show that δD is -90.50 ‰ -41.00 ‰ and δ18O is 9.45 ‰ ~ 13.04 ‰. Stable isotope values indicate that the ore-forming material of Shangfang molybdenum is dominated by magmatic hydrothermal fluid in the early stage with a large amount of rainwater injected in late stage.