【摘要】 用单颗粒锆石铅蒸发-沉积法分析张家口地区赋金水泉沟碱性杂岩体形成时代，保持封闭体系的3颗锆石的²⁰⁷Pb／²⁰⁶Pb值表面年龄在1607-1667Ma之间，与锆石U－Pb法上交点年龄（1718±65）Ma基本一致。水泉沟碱性杂岩体是在16-17亿年前形成的。更多还原

【Abstract】 The forming age of the gold-bearing Shuiquangou alkaline rock was determinedwith the help of single grain zircon Pb-evaporation method. The apparent age(1607-1667Ma) of crystal zircon grain domains, where almost enclosed system exists, isconsist with that (1718Ma) obtained by the U-Pb conventional method. This suggeststhat the gold-bearing Shuiquangou alkaline rock was formed 1600-1700Ma ago.更多还原