A whole-rock Sm–Nd isochron age of (306±7) Ma was reported for theWajilitag intrusion (Lu et al., 2000). But Zhang et al. (2008) considered that theemplacement age of the intrusion might be ca. 275 Ma based on the zircon U–Pbdating of the syenite in the B (共 1700 字) [阅读本文] >>


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