摘要
This paper deals with the forming age of the Shuiquangou gold-bearing alkaline rock with the help of the single zircon Pb-evaporation method. The apparent age (1607 - 1667Ma) got from crystalline zircon grain domains, where there exists an almost enclosed system, is in good agreement with zircon U-Pb conventional upper intercept age (1718 Ma), suggesting that the Shuiquangou gold-bearing alkali rock intruded at 1600- 1700 Ma ago.
This paper deals with the forming age of the Shuiquangou gold-bearing alkaline rock with the help of the single zircon Pb-evaporation method. The apparent age (1607 - 1667Ma) got from crystalline zircon grain domains, where there exists an almost enclosed system, is in good agreement with zircon U-Pb conventional upper intercept age (1718 Ma), suggesting that the Shuiquangou gold-bearing alkali rock intruded at 1600- 1700 Ma ago.
关键词
锆石年龄
张家口地区
河北
碱性岩
铅
alkali rock
single zircon age
Zhangjiakou
Hebei Province
