“康滇地轴”北段花岗岩岩浆类型及其含矿性

The Types of Granite Magma and Their Ore-Bearing Characteristics in The Northern Part of"Kang-Dian Axis

康滇地轴位于扬子地台西部边缘,是我国著名的南北向构造带。在其北段广泛分布着不同时代、不同类型的花岗岩,沿安宁河深断裂和金河—箐河深断裂构成了南北向花岗岩带。这些花岗岩可分为两大类,一、陆壳重熔S型花岗岩,二、上地幔基性岩浆分异的Ⅰ型花岗岩。它们在时空分布、岩石化学性质、含矿性和成岩机理等方面都各具不同的特点。

The northern part of"Kang-Dian Axis"is situated in the western margin of the Yangzi platform.Here are distributed S type granite of the Jinning-Chengjiang period and I type granite of the Lndosinian-Yenshan period.The S type granite is located within the Yangzi platform.It associated closely with rhyolite and is related to tine and tungstun ores.The I type granite occurs in the transitional belt of the trough and stage.It is associated with the gabbro,Emei mount basalt and syenite,and is related to the deposit of rare-earth,niobium and tantalum.