【摘要】 西藏雄村铜金矿是近年来在冈底斯成矿带新发现的大型斑岩型铜金矿床。通过对Ⅰ号矿体富矿围岩、成矿期前侵入岩、成矿期侵入岩的岩石学、常量与微量元素以及金属硫化物的硫、铅同位素研究表明,Ⅰ号矿体火山岩和侵入岩具有一致的微量元素组成,均强烈亏损Nb、Zr、Ti,相对富集Rb、Ta、Hf、Y。Mg#介于7.9~34.4,平均为19.8。黄铁矿的铅同位素具有地幔铅和地壳铅混合特征,金属硫化物硫同位素组成与地幔硫接近。Ⅰ号矿体形成于中侏罗世早期特提斯洋向北俯冲的岛弧环境,岩浆起源于部分熔融的地幔,并混染有壳源物质,成矿金属来源于岩浆。更多还原

【Abstract】 The Xiongcun copper-gold deposit is a new discovered large-size porphyry copper-gold deposit in the Gangdisi belt in recent years.The petrology,major elements,trace elements and S,Pb isotope studys of mineralizing wall rock,pre-mineralizing intrusion and mineralizing intrusion indicate that the volcanic and intrusions rocks have similar trace elements composition,losing Nb,Zr,Ti and relatively enriching Rb,Ta,Hf,Y.Mg# ranges from 7.9 to 34.4,averaging 19.8.Lead isotope of pyrite has mantle and crust mixed lead characteristics.Sulfur isotope composition of metal sulfide is close to the sulfur of mantle.NoⅠ orebody of the Xiongcun copper-gold deposit formed in the island subduction environment at early Middle Jurassic.The magma originated from partially melting of mantle,mixing with crust materials.The ore-forming materials derived from magma.更多还原