中国地质2013，Vol.40Issue(4)：1202-1208,7.
黑龙江三道湾子金矿床同位素年龄对成矿时代的约束
Metallogenic epoch of the Sandaowanzi gold deposit in Heilongjiang Province:Constraints from the evidence of isotopic age
摘要
Abstract
Daxinganling area is an essential metallogenic concentration area in Northeast China.In recent years,the Sandaowanzi gold ore deposit was discovered in this area,and gold exists as telluride.In some local places,the grade of gold has reached several percentage points.The study of isotopic chronology of allgovite which crosscuts the quartz-vein shows that the 40Ar/39Ar age of anorhtose is between 115±1.1 Ma and 118±1.2 Ma,which indicates the emplacement age of allgovite.Two volcanic eruption centers of Guanghua period were discovered in the ore district,characterized by strong silicification and pyritization.They have the same age of alteration as the Sandaowanzi gold ore district,which suggests that the gold mineralization took place identical with or later than volcanic eruption of Guanghua period.Zircon age from rhyolite formation of gold is 125.3Ma.Therefore,the formation of the gold deposit should be younger than volcanic eruption of Guanghua period and before the emplacement of allgovite,and hence the metallogenic epoch should be between 125.3Ma and 115Ma.关键词
三道湾子/金矿床/同位素年代学/黑龙江Key words
Sandaowanzi/ gold deposit /isotopic age/ Heilongjiang分类
天文与地球科学引用本文复制引用
赵天宇,赵海滨,孙丰月,刘俊来..黑龙江三道湾子金矿床同位素年龄对成矿时代的约束[J].中国地质,2013,40(4):1202-1208,7.基金项目
教育部高等学校博士学科点专项科研基金项目(20110145130001)、地质过程与矿产资源国家重点实验室和国家理科基地资金项目、三道湾子金矿公司科研专项基金联合资助. （20110145130001）
