中文摘要：

对比研究了中国26个主要斑岩铜矿的地球化学特征和年代学,结果表明其中25个矿床与埃达克(质)岩有成因联系,且多数与玄武质下地壳熔融形成的埃达克岩(C型)有关,现有数据表明土屋-延东和普朗斑岩铜矿可能与俯冲板片熔融形成的埃达克岩(O型)有关。容矿斑岩的初始锶值为0.7034～0.7090,均大于洋中脊玄武岩和亏损地幔的初始锶值,多数与EMI的初始锶值接近,推测其源区或源岩主要为玄武质下地壳,少数为洋中脊玄武岩,并受到中、上地壳不同程度的混染,这与两类埃达克岩的源区基本一致。虽然埃达克质岩浆具有形成斑岩铜矿的巨大潜力,但并非所有埃达克岩都能成矿,不同岩体需具体分析。

英文摘要：

A comparative study of the geochemical characteristics and geochronological data of 26 main porphyry copper deposits in China has been carried out.The results of this work indicates that 25 deposits are associated with adakitic rocks especially associated with the C-type adakite,formed by the magma derived from the partial melting of basaltic lower-crust.The available data show that the Tuwu-Yandong and Pulang porphyry copper deposits are probably associated with O-type adakite,formed by magmas derived from...