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测定了冈山县中部有汉花岗闪长岩和贺阳花岗岩Rb-Sr全岩等时线年龄和sr同位素初始比值(SrI)。它们的主岩相年龄分别为92.0±6.5Ma和81.2±5.5Ma,SrI分别为0.70696±14和0.70684±10。
The Rb-Sr whole-rock isochron age and sr isotopic initial ratio (SrI) of Han granodiorite and Heyang granite in central Okayama were measured. Their main lithofacies ages were 92.0 ± 6.5Ma and 81.2 ± 5.5Ma, respectively, with SrIs of 0.70696 ± 14 and 0.70684 ± 10, respectively.