赣中麻鸡嶂钼钨多金属矿化带辉钼矿Re-Os年龄及意义  

Molybdenite Re-Os Age and its Geological Significance of Majizhang Molybdenum Tungsten Polymetallic Mineralization Belt in the Central of Jiangxi

作　　者：宋凯林[1] 张树明[1,2] 魏正宇[2] 张良[2] 

机构地区：[1]东华理工大学核资源与环境省部共建国家重点实验室培育基地,江西南昌330013 [2]东华理工大学放射性地质与勘探技术国防重点学科实验室,江西抚州344000

出　　处：《东华理工大学学报（自然科学版）》2014年第1期21-25,共5页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金项目(41172079);中国地质调查局项目(1212011120836)

摘　　要：通过对研究区含矿石英脉及云英岩化石英脉中6个辉钼矿样品进行Re-Os同位素测定,获得石英脉型辉钼矿等时线年龄及模式年龄分别为(157.2±1.4)Ma和(158.5±2.6)Ma,云英岩化性辉钼矿模式年龄为(185.4±2.5)Ma,与中国东部中生代大规模金属成矿时代相当。其成矿机制可归纳为:矿化围岩云英岩化→第一期成矿(早期云英化岩型多金属矿)→第二期成矿(晚期石英脉型矿化多金属矿)。其中云英岩化是本区多金属成矿的必要前提,第一期云英化岩型多金属成矿作用是第二期石英脉型多金属成矿作用的基础。6 molybdenite samples from the mining area were proceed Re-Os isotope determination. The isochron age and model age of the quartz vein type molybdenite are （157.2 ± 1.4） Ma and （158.5 ±2.6） Ma respectively. The model age of greisenization molybdenite is （ 185.4±2.5 ） Ma. Both of them are equal to east China the mesozoic metallogenic age. The mineralization mechanism of the study area can be summarized as follows： the surrounding rock of mineralization greisenization→the first phase of mineralization（ early greisenization polymetallie mineralization） →the second phase of mineralization （ advanced quartz vein type polymetallic mineralization） , in which polymetallic is the prerequisite of the study area. The first phase of early greisenization polymetallic mineralization is the basic of the second phase of advanced quartz vein type polvmetallic mineralization.

关 键 词：辉钼矿 铼-锇同位素定年 成矿时代 

分 类 号：P618.6[天文地球—矿床学]