福建太阳山破碎带蚀变岩型金矿形成的矿相学证据  

Taiyangshan altered tectonite-type gold ore deposit in Fujian province: evidences from mineralography

作　　者：徐素云[1,2] 刘敬青 张丽红 

机构地区：[1]南京大学地球科学与工程学院,南京210093 [2]江苏省有色金属华东地质勘查局,南京210093 [3]有色金属华东地质勘查局八○五队,南京210007 [4]重庆地质矿产研究院,重庆400042

出　　处：《矿产与地质》2012年第1期80-88,共9页Mineral Resources and Geology

摘　　要：系统的矿相学研究表明,太阳山金矿矿石矿物主要为黄铁矿、磁黄铁矿、含银自然金、闪锌矿、黄铜矿;矿床围岩蚀变种类较多,主要有硅化、绢云母化、钾长石化、石墨化。矿石结构包括自形—半自形粒状结构、假象结构、压碎结构、包含结构、错断结构等,矿石构造包括浸染状、微脉浸染状、脉状、网脉状构造。金主要以包裹金、粒间金、裂隙金、赋存于石英、黄铁矿、磁黄铁矿中。矿区内常见的是碎裂岩和糜棱岩化岩石,很少见到糜棱岩,不存在超糜棱岩、构不成糜棱岩系列。本矿床地质特征与典型的破碎带蚀变岩型金矿山东焦家金矿极为相似。因此,太阳山金矿属于典型的破碎带蚀变岩型金矿。Systematic ore mineralogy research shows that the Taiyangshan gold deposits ore minerals are mainly composed of pyrite, pyrrhotite, silver-bearing native gold, sphalerlite and chalcopyrite, etc. The wall-rock alterations include silicification, sericitization, kfeldsparization, graphitization and migmatization, etc. The ores have euhedralsubhedral-pseudomorphic crush texture, poikilitic texture, pressure texture, feint texture and offset texture, and have impregnated structure, vein structure and net vein structure. Gold mainly occur in pyrite, pyrrhotite and quartz, as encapsulated gold, grained gold, fractured gold, adsorbed gold. Cataclastic and mylonitization rock are common in the mining area, but mylonite is rarely, ultra-mylo- nite is not existed. The geological characteristics are extremely similar to the Jiaojia gold deposit of typical altered tectonite-type gold in Shandong province. Consequently, the Taiyangshan gold deposit is a typical al- tered tectonite-type gold ore deposit.

关 键 词：太阳山金矿 矿石矿物 矿床成因 破碎带蚀变岩型 

分 类 号：P618.51[天文地球—矿床学]