摘要
大厂矿田矿化蚀变分带特征十分明显， 在水平方向， 整个矿田可分为西、中、东３ 个矿带。西、东矿带主要产出锡石—硫化物型矿床， 围岩蚀变类型主要有硅化、钾长石化、电气石化、绢云母化、碳酸盐化等。中矿带主要分布矽卡岩型锌铜硫化物矿床， 并有锑钨石英脉型矿床叠加其上。整个矿田矿化蚀变分带又具明显的不对称性， 并且每一种矿化类型又表现出各自的分带特点。大厂矿田的总体矿化蚀变分带特征与传统的顺向或逆向分带不同， 反映了多成因。
Zonal distribution of mineralization and alteration is obvious in Dachang ore field In horizontal direction, the ore field can be seperated into three ore zones—eastern, western and middle zone Cassiterite-suphide deposits are distributed over eastern and western zones, the main kinds of wallrock alteration there are tourmalinization, potash feldspathization, silicification,sericitization and carbonatization Zn-Cu suphide skarn deposit is located in middle zone, which is telescoped by Sb-W quartz vein deposit of later period The zonal distribution of the ore field is not symmetrical, and each kind of deposit has its own zonal distribution The zonal distribution of Dachang ore field is different from traditional model of normal or reverse zoning It reflects the specialization of zonal distribution of telescoped deposits formed by polygenesis and more than ore epoch $$$$
出处
《广西地质》
1999年第3期17-23,共7页
Guangxi Geology
关键词
包裹体
成矿机制
锡矿床
多金属矿田
矿化
蚀变
Dachang
zonal distribution of mineralization and alteration
stable isotopic
fluid inclusion composition
ore-forming mechanism
