中文摘要：

为查明朱砂红矿床成矿流体来源及矿床蚀变-矿化流体演化过程,在已厘定的朱砂红矿床脉体类型基础之上,选取了不同蚀变阶段的蚀变矿物,进行了系统的H_O同位素测试。研究发现：早期A脉[无矿团块状石英脉（A1脉）、石英-钾长石脉（A3脉）]石英中包裹体δ18O值介于＋6.0‰~＋11.2‰,δD值介于-90‰~-101‰之间,在δ18O-δD图解中,A脉样品的H_O值组成整体位于去气作用后的残余岩浆水范围,表明引起早期钾硅酸盐化的流体性质为一套高温、高盐度岩浆热液;绿帘石-石英脉（B1脉）的δ18O值和δD值（＋6.6‰和-101‰）显示青磐岩化蚀变形成与高温岩浆流体相分离后的低密度气相流体有关;而斑岩中的石英-黄铁矿-黄铜矿（B3脉）形成时,流体δ18O值（＋4.1‰~＋6.0‰）开始朝雨水线方向发生轻微的氧漂移,表明开始有少量大气降水的加入;晚期D脉形成时的成矿流体δ18O值（＋2.8‰~＋4.9‰）具有明显朝雨水线发生漂移的趋势,表明引起石英-绢云母化及泥化蚀变的成矿热液为岩浆热液和大气降水的混合流体。总之,朱砂红矿床钾硅酸盐化、青磐岩化蚀变,以及该蚀变阶段形成的A脉和早期B脉,均由岩浆热液作用引起,大气降水在钾硅酸盐化向长石分解蚀变转变的阶段开始进入蚀变-矿化系统,而长石分解蚀变为大气降水与岩浆热液共同作用的产物。

英文摘要：

In order to trace the origin of ore-forming fluid during the complicated mineralization and alteration process of the Zhushahong porphyry copper-gold deposit, the authors analyzed H and O isotopes of quartz from different alteration and mineralization assemblages to evaluate the source and evolution of the ore-forming fluid. Some conclusions have been reached： （2） δ18O and δD values of water show balance with A-type veins （ ＋ 6.0‰ -- ＋ 11.2‰, - 90%-- - 101‰）, quartz in phyllite （A1）, Qtz-kfs veins （A3）, B-type veins, straight quartz veins （B1）, and Otz-Moly-Py ± Anhy ± Cpy veins （B2）, suggesting that all the ore-forming fluids were derived from magma; （2） δ18O and δD values of water show balance with the Bl-type veins （ ＋ 6.6‰ and - 101‰）, implying that fluids inducing propylitic alteration were dominated by the fluid separated from magrnatic vapor during exsolution with low density, low salinity and high temperature; （3） Considerable variations of δ18O in Qtz -Py-Cpy veins （B3） （ ＋ 4.1‰-- ＋ 6.0‰） suggest that minor amounts of meteoric water and regional metamor- phic water were partially involved in the magmatic water during transforming of K-silicate alteration to feldspar- destructive alteration; （4） During the formation of D-type veins, meteoric water and underground water were in fused into the ore-forming fluid-system and mixed with magmatic water （δ18O： ＋ 2.8%- ＋ 4.9%）. Feldspar- destructive alteration which overprinted most of the potassie alteration and part of the propylitic alteration was triggered by the reaction of mixed water with porphyries and phyllite. It is thus held that K-silicate alteration and propylitic alteration accompanying with A-type veins and early B-type veins were caused by the action of magmatie fluid. Meteoric water began being infused into the alteration-mineralization system from the transfor- mation period. However, feldspar-destructive alteration was triggered by the mixed fluid of magm