敖仑花钼铜矿床为典型的斑岩型矿床，矿体主要赋存于早白垩世二长花岗斑岩中。成矿作用可以分为4个阶段：石英＋黄铁矿＋辉钼矿阶段（Ⅰ）、石英＋辉钼矿＋黄铁矿＋黄铜矿阶段（Ⅱ）、石英＋黄铁矿＋黄铜矿＋闪锌矿阶段（Ⅲ）、石英＋碳酸盐脉阶段（Ⅳ）。矿物学、流体包裹体岩相学、包裹体显微测温、稳定同位素研究表明;成矿Ⅰ、Ⅱ阶段成矿流体为高温（316 ℃~462 ℃）、高盐度（2.23 %~45.54 %）的NaCl-H₂O-CO₂体系热液；成矿Ⅲ阶段成矿流体为高温（300 ℃~368 ℃）、低盐度（3.37 %~9.34 %）的NaCl-H₂O体系热液；成矿Ⅳ阶段为低温（130 ℃~260 ℃）、低盐度（3.53 %~11.95 %）的NaCl-H₂O体系热液;总体具有成矿温度、盐度逐渐降低的特征。氢、氧同位素分析结果表明，早期成矿流体以岩浆水为主，晚期逐渐混入大气降水；δ34S值为1.9 ‰~4.9 ‰，指示硫同位素主要来源可能是岩浆。由于温度、压力降低，流体发生沸腾作用，CO₂挥发，流体pH升高，导致Mo、Cu等成矿元素开始沉淀，最后富集成矿。

Aolunhua Mo-Cu Deposit is a typical porphyry deposit.The ore bodies mainly occur in the monzonitic granite porphyry in the Early Cretaceous.The hydrothermal mineralization can be pided into 4 stages:quartz＋pyrite＋molybdenite stage(Ⅰ),quartz＋molybdenite＋pyrite＋chalcopyrite stage（Ⅱ）,quartz＋pyrite＋chalcopyrite＋sphalerite stage（Ⅲ）,quartz＋carbonate veins stage（Ⅳ）.The study on mineralogy,petrography of fluid inclusions,micro-thermometry of inclusions,and stable isotope analysis shows that the primary ore-forming fluids in Stage Ⅰ and Ⅱ are high temperature(316 ℃-462 ℃),high salinity(2.23 %-45.54 %)NaCl-H₂O-CO₂ type solutions;the ore-forming fluids in Stage Ⅲ are high temperature(300 ℃-368 ℃),low salinity(3.37 %-9.34 %)NaCl-H₂O type solutions; the ore-forming fluids in Stage Ⅳ are low temperature(130 ℃-260 ℃),low salinity(3.53 %-11.95 %)NaCl-H₂O type solutions,indicating the trend of decreasing ore-forming temperature and salinity.H,O isotope analysis shows that early ore-forming fluids are mainly magmatic water,meteoric water blended in later;δ34S value is 1.9 ‰-4.9 ‰,indicating magmatic source of S isotope.Due to decreasing temperature and pressure,the fluids boil,CO₂ vaporizes,fluid pH increases,so that ore-forming elements such as Mo,Cu precipitates and eventually concentrates into deposits.