黔西南微细浸染型金矿的地质特征和几点认识

摘要

系统总结了黔西南微细浸染型金矿的基本特征。提出了黔西南微细浸染型金矿的形成是燕山期区域构造-热流-成矿物质演化过程的重要事件； 构造是本区主要的控矿因素，亦是金矿形成的主要成矿作用；容矿细碎屑岩石，为金的沉淀提供了有利的环境；黔西南微细浸染型金矿具有统一的矿床成因，金主要来自于深部地质体，部分来自于上部地层；成矿流体是以大气降水为主兼有深部流体、地层流体混合形成，为具有中低温、中低盐度、弱酸性-弱碱性、还原性特点的Na+-Cl--Ca2+型流体。%Research on the basic characteristics of micrograined disseminated gold deposits in southwest Guizhou shows that these deposits were formed as a result of the regional tectonizm-hotflow-ore-forming substance evolution. Structure is the main ore-control factor and the ore-forming process in this area. The microclastic rock of host strata furnishes gold ore deposition with an advantageous environments.These deposits have the same origin. Gold is mainly from the deep geological bodies and partly from the upper strata. Ore-forming fluid is mixed with plutonic fluid ,formation water and meteoric water and it is Na+-Cl--Ca2+ type with middle to low temperature, middle to low sanility, weak acidity to weak alkalinity and reducibility.