云南者桑金矿地质特征及成因分析  

Geological Characteristics and Genesis Analysis of Zhesang Gold Deposit in Yunnan

作　　者：陈少奇 皮桥辉[1] 

机构地区：[1]桂林理工大学地球科学学院,广西 桂林

出　　处：《地球科学前沿（汉斯）》2021年第2期160-174,共15页Advances in Geosciences

摘　　要：云南富宁者桑金矿是我国滇黔桂地区典型的卡林型金矿床之一,以者桑金矿中三种不同类型的赋金矿石,即辉绿岩型矿石、泥质板岩或粉砂岩型矿石、泥灰岩型矿石中的载金矿物毒砂和黄铁矿为研究对象,通过镜下观察和电子探针分析,对其进行矿物特征观察和地球化学特征分析。研究发现辉绿岩型矿石中细粒自形毒砂、菱形毒砂及破碎状毒砂的尖端含金性较好,矿化多与硅化和绢云母化有关;泥质板岩或粉砂岩中粗粒自形五角十二面体黄铁矿和脉状黄铁矿含金性较好,矿化多与炭化和硅化密切相关;泥灰岩型矿石中普遍含金,细粒菱形毒砂的含金性较好,矿化多与硅化、碳酸盐化及炭化有关。另外结合前人对者桑金矿矿物包裹体及元素地球化学特征的研究,综合者桑区域地质特征,探讨了三种矿体的成因及成矿模式。Yunnan Funing Zhesang Gold Mine is one of the typical Carlin-type gold deposits in Yunnan, Guiz-hou and Guizhou regions of my country. There are three different types of gold-bearing ores in Zhesang Gold Mine, namely diabase ore, argillaceous slate or the gold-bearing minerals arsenopyrite and pyrite in siltstone-type ore and marl-type ore are the research objects. Through microscopic observation and electron probe analysis, the mineral characteristics and geochemical characteristics of them are observed. The study found that the fine-grained arsenopyrite, rhombic arsenopyrite, and broken arsenopyrite in diabase ores have good gold-bearing tips, and the mineralization is mostly related to silicification and sericitization;argillaceous slate or siltstone is medium-coarse Granular pentagonal dodecahedral pyrite and vein-shaped pyrite have good gold-bearing properties, and mineralization is mostly closely related to carbonization and silicification;marl-type ores generally contain gold, and fine-grained arsenopyrite contains gold. It has good properties, and mineralization is mostly related to silicification, carbonation and carbonization. In addition, combined with previous studies on the mineral inclusions and element geochemical characteristics of the Zhesang gold deposit, combined with the geological characteristics of the Zhesang area, the genesis and metallogenic models of the three ore bodies are discussed.

关 键 词：卡林型金矿 载金矿物 地质特征 成因分析 

分 类 号：P61[天文地球—矿床学]