ZIRCON U-Pb LA-ICP-MA AGE OF THE INTRUSIVE ROCK IN SOUTHERN ZHANGGUANGCAILING AREA

Mesozoic granitic magmatism is developed in the Zhangguangcaling area. However, accurate isotopic age data is lack for the granite in the area. Based on the 1:50 000 regional geological and mineral resources survey in Heilongjiang Province, the author carries out the zircon U-Pb isotopic dating for the granitic rocks in the area. The results show that the Triassic granite was formed in 224-229 Ma; while the Jurassic intrusive rock is dated as 202-193 Ma.