四川丹巴金矿床金矿物学特征及黑铋金矿的指示意义  

Gold mineralogical characteristics and indicative significance of maldonite in Danba Gold Deposit,Sichuan Province

作　　者：马天祺 黄睿 刘效孔 陈翠华[1] Ma Tianqi;Huang Rui;Liu Xiaokong;Chen Cuihua(College of Geosciences,Chengdu University of Technology;College of Literature,Sichuan Normal University)

机构地区：[1]成都理工大学地球科学学院 [2]四川师范大学文学院

出　　处：《黄金》2024年第2期75-79,共5页Gold

基　　金：四川省科技厅面上项目(2018JY0477);四川省科技厅自然科学基金项目(2023NSFSC0274)。

摘　　要：丹巴金矿床是位于松潘—甘孜造山带东南缘典型的碲化物型金矿床。该矿床中发育大量明金与碲铋矿物。以叶碲铋矿和自然金为主要研究对象,通过显微岩相学观察、扫描电镜能谱分析,对自然金的矿物学特征进行了较为详细的研究。结果显示,丹巴金矿床载金矿物主要有磁黄铁矿、黄铜矿、黄铁矿、叶碲铋矿、自然铋、黑铋金矿,大量自然金与叶碲铋矿、自然铋具有密切的时空关系,黑铋金矿的产出是铋熔体析出并清除金最直接的证据。Danba Gold Deposit is a typical telluride-type gold deposit located in the southeastern margin of the Songpan-Ganzi orogenic belt.A large number of visible gold and tellurium-bismuth minerals are developed in this deposit.The mineralogical characteristics of native gold were studied in detail through microscopic petrographic observation and scanning electron microscopy,with pilsenite and native gold as the main research objects.The results show that the gold-bearing minerals in Danba Gold Deposit mainly include pyrrhotite,chalcopyrite,pyrite,pilsenite,native bismuth,and maldonite.A large amount of native gold has a close spatiotemporal relationship with pilsenite and native bismuth.The occurrence of maldonite is the most direct evidence of bismuth melt precipitation and gold removal.

关 键 词：碲化物型 丹巴金矿床 黑铋金矿 自然金 矿物学特征 松潘—甘孜造山带 

分 类 号：TD11[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]