Abstract
A group of Rb-Sr ages, i.e. plagioclase-whole rock (WR) isochron age of (205 ±7) Ma, hornblende-WR isochron age of (164 ±10) Ma and biotite-WR isochron age of (123.4 ±1.2) Ma, for one pyroxenite sample from Renjiawan in North Dabie Terrane (NDT) are reported. According to the closure temperature of 600°C for plageoclase and 300°C for biotite, the Renjiawan pyroxenite should intrude into the NDT before 205 Ma, and the younger Rb-Sr ages may reflect the cooling history of the intrusion or reset by the very strong Cretaceous thermal event in NDT.
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