中文摘要：

萨尔切什梅铜-钼-金矿床位于伊朗南部,是特提斯带中最大的斑岩型矿床。矿床赋存于花岗闪长斑岩中,该岩石具有高Sr/Y和La/Yb比值的特征,岩浆起源于加厚下地壳的部分熔融。斑岩体锆石U-Pb年龄为13~11Ma,蚀变岩K-Ar年龄为12.5Ma。矿体分为表生矿带和原生矿带两部分,与表生矿带有关的蚀变矿物主要为绢云母和高岭土;原生矿带蚀变具有明显的环带分布特征,从内向外依次为钾化、绢云岩化、青磐岩化。矿石品位在浅部和深部有较大差异,浅部表生矿石铜品位平均值约为1.99%,而深部原生矿石铜品位平均值约为0.89%。成矿物质源自岩浆系统,富含金属物质的岩浆流体沉淀形成含矿脉体,造成围岩钾化蚀变;大气降水的加入形成绢云岩化及更富放射性铅的硫化物。后期地表氧化造成铜和钼金的进一步富集。

英文摘要：

Located in the southern Iran, the Sar Cheshmeh Cu-Au deposit containing 1200 million tonnage of ore reserves, with an average grade of 1.2% Cu, 0.03% Mo, 0.27g/t Au and 3.9 g/t Ag, is the largest one in the Tethys belt. Published geological and geochemical data have been analyzed and summarized on this giant deposit. Mineralization of Sar Cheshmeh deposit is associated with granodiorite porphyry stock, and occurs as stock or disseminated veinlet. Ore-bearing rocks have relatively high Sr/Y and La/Yb ratios, which have been interpreted as a source arising from partial melting of thickened lower-crust. Zircon U-Pb and biotite K-Ar dating show the hydrothermal alteration and mineralization timing at the Sar Cheshmeh deposit is 13--11 Ma. The ore body can be divided into supergene zone and hypogene zone. The supergene zone is composed of hematite gossans enriched in Au, Mo, Ag and iron-oxides and copper-oxides enriched in Cu, Zn, Pb. Alteration in the supergene zone consists of sericite, kaolinite and clay minerals and ar- ranged from the center to the periphery including potassic, potassic affected by phyllic, strongly phyllic, and propylitic alteration in hypogene zone. Supergene zone have developed averaging 1. 99% Cu, more than twice than that of hypogene zone （0.89% Cu）. The fluid responsible for the potassic alteration and associated mineralization was essentially magmatic and charactered by high temperature high salinity. Influx of meteoric water into hydrothermal system and mixing with magmatic fluid produced phyllic alteration and deposition of sulfides with more radiogenic lead isotope. Supergene oxidation and leaching have caused the remobilization of Cu into the immature gossans and Mo and Ag into the mature hematite-bearing gossans.