摘要
邢家山钨钼矿床是山东省唯一的大型钼矿床,其中伴生钨达到中型规模。辉钼矿Re-Os同位素测年结果表明,5件辉钼矿的187Re-187Os等时线年龄为157.6Ma±3.9Ma,MSWD=0.24;加权平均模式年龄为161Ma±1.0Ma,MSWD=0.7。胶东金矿省金矿的主成矿期为110～130Ma,钨钼矿床的成矿时代比金矿早30～50Ma,表明胶东半岛在中生代至少存在2期成矿作用,早期以钼成矿为主,晚期以金成矿为主。结合区域成矿年代学数据,邢家山钨钼矿床成矿时代与南岭成矿带东段钨矿床主成矿期是一致的,表明150～160Ma是中国东部一个重要的成矿作用时期,为构筑中国东部成矿域的精细成矿年代学结构提供了依据。
Located in the Jiaodong metallogenic province,the Xinjiashan ore deposit is the only large-size molybdenum deposit in Shandong Province,and the associated tungsten resources in this ore deposit have already reached middle-scale reserves.This study provides the first high-precision dating of the mineralization age of this ore deposit.Re-Os dating of five molybdenite separates from ores has yielded an isochron age of 157.6±3.9Ma（MSWD=0.24）,and a weighted mean age of 161Ma±1.0Ma（MSWD=0.7）.The main metallogenic epoch of Jiaodong metallogenic province is 110～130Ma,which means the metallogenic age of W and Mo mineralization in this area is earlier than that of Au.It is indicated that there existed at least two ore-forming periods in Jiaodong,with the former being W,Mo,and the latter being Au.In association with the isotope data obtained from East Nanling,the authors hold that the W metallogenic epochs of the two areas are consistent with each other.This study suggests that there existed an important mineralization epoch during 150～160Ma in eastern China.
出处
《地质通报》
CAS
CSCD
北大核心
2011年第8期1294-1302,共9页
Geological Bulletin of China
基金
中国地质科学院矿产资源研究所基本业务费专项资金项目<南岭东段--赣南地区钨矿与铀矿的成因联系研究>(编号:K0906)
财政部
科技部深部探测技术与实验研究专项<南岭成矿带地壳岩浆系统结构探测实验研究>课题(编号:SinoProbe-03-01)
国土资源部危机矿山专项<桂东--粤西地区铅锌金等矿床成矿规律总结研究>项目(编号:20089946)
关键词
邢家山钨钼矿床
成矿时代
胶东半岛
Xingjiashan W-Mo deposit
ore-forming age
Jiaodong Peninsula
