赣北东坪铜钨多金属矿点岩体锆石U-Pb定年及其地质意义  

U-Pb Dating of Mineralization Rock Zircon in Dongping Copper Tungsten Mine and Its Geological Significance

作　　者：晏超[1] 陈郑辉[2] 杨立强[1] 王艺茜[3] 曾乐[4] 胡正华[5] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中国地质科学院矿产资源研究所,北京100037 [3]长安大学,陕西西安710054 [4]天津地质矿产研究所,天津300170 [5]江西省地质调查研究院,江西南昌330001

出　　处：《中国钨业》2017年第3期1-11,共11页China Tungsten Industry

基　　金：全国矿产资源潜力动态评价项目(12120110300015000)

摘　　要：武宁县东坪铜钨多金属矿点是赣北地区发现的石英脉型黑钨矿床。根据矿床地质特征及对样品采集后分析认为,东坪矿区深部隐伏白云母花岗岩富硅、富碱,属过铝质岩石,部分样品σEu表现出明显的负异常;对白云母花岗岩进行LA-ICP-MS锆石U-Pb定年法研究,获得成岩年龄为(128.79±0.39)Ma,属燕山晚期,与赣南典型钨矿床的成岩年龄形成存在一定的时间差距,与赣北地区的阳储岭、大湖塘、朱溪等大型超大型钨矿的成矿亦存在时间差,表明赣北地区钨矿存在多个成矿作用时期,显示赣北地区找矿潜力巨大。Dongping tungsten ore in Wuning County is the largest quartz vein type wolframite deposit. The geological characteristics of the deposit and sample analysis showed that the deep -buried muscovite granite in Dongping mining area is rich in silicon and alkali, some samples of aEu showing obvious negative anomalies. It showed that the diagenetic age was （128.79 ± 0.39） Ma by applying the zirconia LA-ICP-MS U-Pb dating method to the muscovite granite. There existed some time gap between the diagenetic age of Dongping tungsten ore and that of the tungsten ore in Southern Jiangxi. It indicated that there were many mineralization periods in the tungsten deposits in northern Jiangxi, showing its great potential for tungsten prospecting.

关 键 词：赣北 东坪铜钨多金属矿 锆石U-Pb年龄 

分 类 号：P597.3[天文地球—地球化学] P618.2[天文地球—地质学]