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采用世界上最先进的ＳＨＲＩＭＰ锆石Ｕ－Ｐｂ测年技术，对招掖地区郭家岭型花岗岩及成矿后花岗斑岩脉进行了年代学研究，精确地测定了郭家岭型花岗岩的年龄为１３０－１２６Ｍａ，成矿后花岗斑岩脉的年龄为１２０±２Ｍａ，金矿化被限定在１２６－１２０Ｍａ之间。结合岩体年龄和与金矿化密切的空间关系及地球化学上的亲缘关系，认为郭家岭型花岗岩属造山晚期花岗岩，金矿化主要与郭家岭型花岗岩有关。该花岗岩异常高的Ｂａ、Ｓｒ含量可作为太古宙绿岩地体环境下判别与金矿化有关花岗岩的地球化学标志。
Using the world’s most advanced SHRIMP zircon U-Pb dating technique, the Kuoziling area granite and metallogenic granite porphyry vein were studied chronologically, and the age of the Guojialing granite was accurately determined to be 130- 126Ma, granite porphyry vein after the age of 120 ± 2Ma, gold mineralization is limited to between 126-120Ma. Considering the age of the rock mass and the close spatial relationship with the gold mineralization and its geochemical relationship, it is believed that the Guojialing granite is a late orogenic granite. The gold mineralization is mainly related to the Guojialing granite. The abnormally high content of Ba and Sr in this granite can be used as a geochemical marker for distinguishing granite from the gold mineralization in the Archean greenstone terrain.