山东雁翎关地区雌山岩体锆石铀铅年龄报道

ZIRCON U-Pb AGE OF CISHAN MIGMATITIC GRANITE IN YANLINGGUAN, SHANDONG AND ITS SIGNIFICATION

雌山岩体的锆石U-Pb年龄为2396Ma,该值被认为是岩体的形成年龄。

The zircon U-Pb age of the Cishan pluton is 2396 Ma, which is considered to be the time of pluton emplacement. The data, in conjunction with the previous chronological studies, show that migmatization and magmatism took place soon after regional metamorphism in the area, and that in the late Archaean-early Proterozoic (2400-2600 Ma), the Taishan-Yanlingguan area underwent a regional metamorphism of amphibolite facies.