摘要
金洞岔金矿床是著名小秦岭金矿田中最重要的矿床之一，属以后生作用为主的层控石英脉型金矿床。矿石包体研究与热力学计算表明成矿温度为１６７～３４０℃，压力为１４×１０８Ｐａ，成矿流体具有弱酸性至中酸性，成矿物质主要来源于太华群变质基性火山喷发岩及碎屑岩。金主要呈硫氢络合物［Ａｕ（ＨＳ）２］－的形式进行迁移，随着温度、压力、氧逸度、硫逸度、ｐＨ、Ｅｈ值等的变化。
JinDongCha Gold Deposit is one of the most important gold deposits in the famous XiaoQingLing gold field.It belongs to stratabound quartz vein gold deposit.It shows from study of ore enclosure and thermodynamic calculation that its mineralization temperature is 167-340,the pressure is 1.4108Pa,the mineralizing fluid is provided with weak acidity and medium acidity,and the mineralizing materials are mainly from metamorphic volcanicextrusion and volcaniclastic rocks of Taihua Group.The gold migrate as 2]-.Along with variations of T(temperature),P(pressure),fO2fS2pH and Eh value,gold are precipitated and enriched in the suitable tectonic space.
出处
《黄金》
CAS
北大核心
1999年第7期1-5,共5页
Gold
关键词
层控型
金矿床
流体包裹体
成矿机制
stratabound gold deposit
fluid enclosure
physicalchemical condition
mechanism of mineralization
