云南都龙隐伏花岗岩的特征及其成矿作用

都龙隐伏花岗岩体是老君山花岗岩基南延隐伏部分。岩相学、岩石化学及微量元素等资料表明,老君山花岗岩属S型花岗岩,都龙隐伏花岗岩是老君山花岗质岩浆分异演化的晚期产物。隐伏花岗岩呈脊状侵入在寒武系中,在其“顶上带”产生了一系列地质、地球物理、地球化学的标志及异常。都龙锡石-硫化物矿床地质特征表明:隐伏花岗岩与锡的成矿作用在时空上及物质来源上关系密切,花岗岩对矿床的形成起着决定性的作用。

THE HIDDEN GRANITE AND ITS METALLIZATION IN DULONG, YUNNAN

Dulong hidden granite is a southward stretching part of Laojunshan granite batholith. Data on petrography, petrochemistry and trace elements show that Dulong hidden granite belongs to the S-type granite, and that the hidden intrusive body is the later product of granitic magma evolution. The hidden granite emplaced into cambrian wall rocks is a ridge-like body. There are series of features and anomalies related to hidden granite on geology, geochemistry and geophysics in the wall rocks of the top belt of hidden granite. Geological properties of the Dulong cassiterite-sulfide deposit show that there is a close relation between hidden granite and metallization on time and space and in the ore-forming matter. The granite plays an important role on the ore genesis of the tin deposit.