中文摘要:栖霞金矿床伴生的黑钨矿是低温热液的产物。成矿流体的成分与典型的大气降水热液组分相类似，其δ18O约为-3.6‰～4.5‰，δD约为-56‰～-95‰，变化范围较大，但这些氢、氧同位素值很好地反映了大气降水在不同温度和W/R比值条什下与胶东群变质岩交换后的分布特征，成矿作用以W/R比值较低为特点。金矿床的Rb-Sr等时线年龄为125.8×l06 a，与胶东群变质岩系和抛合花岗岩的时差较人，矿化物质的Sr同位索初始比高达0.7168，大气降水深循环对流作用是形成栖霞金矿床的牛要原因。
Abstract:The Qixia gold deposit is one of the important quartz-vein type deposits hosted in metamorphic rocks in eastern Shandong. Wolframite associated with gold mineralization of the deposit is rich in iron but poor in manganese, suggesting that the mineral is crystallized from hydrothermal solution at low temperatures. The main metallogenic stage of Qixia gold deposit has temperature of 160~270℃, and the gascous phase in the fluid inclusions is dominated by H2O and CO2. Na+,Ca2+ and Cl- are the major components of the liquid phase while K+ and F'- arc present in relatively small amounts; the wt% NaCl equiv. values of fluids are between 4% and 8%. In addition, the fluid is characterized by either Ca2+ >Na+ >K+ (in five samples) or Na+ >Ca2+ >K+ (in two samples),(1uite similar to the composition of the ore-forming fluid derived from meteoric water. Initial data of the hydrogen and oxygen isotopic compositions of ore-forming fluid fall whithin a wide range: δDH2O= -5.6‰ ~ -95‰ and δ18OH2O= -3.6‰～4.5‰, relative to SMOW. These isotopic values fully reflect the distributive features of meteoric water exchanging with metamorphic rocks of Jiaodong Group under the conditions of different temperatures and W/R ratios, and the metallogenic process is charactered by low W/R ratios. ’¨1e Rb-Sr isochron age of the Qixia gold deposit is (125.8 +1.7)×l06 a, with (87Sr/86Sr), being 0.7168. The time interval between the gold deposit and its country rocks (granite or metamophic rocks) is very long. The formation of Qiaxia gold deposit is directly related to the evolution of geological history in eastern Shandong, and a genptic model in which the deep convective circulating meteoric water react with country rocks can be used to explain the metallogenic mechanism of the deposit.
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基金项目:国家自然科学基金（49000020）
引用文本：
翟建平, 徐光平, 胡 凯.1998.栖霞金矿矿物、流体和同位素特征及意义[J].矿床地质,17(4):307~313.1998.Mineral, ore-forming fluid and isotope characteristics of the Qixia gold deposit and their implications[J].Mineral Deposits17(4):307~313
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