甘肃阳山金矿带泥山矿段508号脉成矿作用浅析

阳山金矿泥山矿段与花岗岩类有关的金矿化是该矿段重要的金矿化类型，通过对斜长花岗斑岩脉及其矿体的研究，探讨此类金矿的基本特征，得出该矿化类型受控于燕山期花岗岩体。区内岩体的分布与构造关系密切，并受断裂的控制，岩脉走向呈近EW向，产出规模一般较小，多呈脉状产出，少量为岩株。岩石类型为中酸性岩，岩性主要为斜长花岗斑岩。通过对斜长花岗斑岩脉的矿化蚀变特征及含金性进行分析研究，认为泥山矿段508号脉成矿过程为含矿物质迁移、富集过程。

Analysis on the 508 Vein Mineralization of Nishan Ore Segment in Yangshan Gold Ore Belt,Gansu Province

The gold mineralization characteristics of granitoid-related is an important type of gold mineralization in Nishan ore segment.Through the study of plagioclase granite porphyry veins and its ore body，probing into the basic features of such gold ore，we conclude that the mineralization type is controlled by Yanshanian grantie.The distribution of rock body in the region is closely related to the structure.Under the control of sunder，the veins with generally small scope and size，have near east-west strike，mostly veined output，and a small amount of rock strains.Rock types in the region is acidic rocks，plagioclase granite porphyry.This article focuses on the mineralization and alteration of the plagioclase granite porphyry and gold content，and come to the conclusion that mineralization of 508 vein in Nishan ore segment contains the process of mineral substance migration and enrichment.