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采自长乐-南澳韧性剪切带的5个单矿物~(40)Ar/~(39)Ar坪年龄分别为107.9 Ma(Mus)、108、2Ma(Bi),107.1 Ma(Bi),109.2 Ma(Hb)和117.9 Ma(Bi),与对应的等时线年龄一致.它们记录了长乐-南澳韧性剪切带的形成时间.样品在不同封闭温度下的年龄重叠说明,作为闽粤沿海碰撞造山带主体之一的长乐-南澳韧性剪切带在形成后(107～118 Ma)经历了快速的初始冷却上升.结合钾长石K-Ar年龄研究和相关的年代学资料表明,该带后期(107～70 Ma)冷却上升速率有所减缓,大约为0.18～1.12mm/a.
The ages of 40 Ar / 39 Ar plateau dating from Changle-Nan’ao ductile shear zone are 107.9 Ma, 108,2 Ma, 107.1 Ma (Bi), 109.2 Ma (Hb) and 117.9 Ma (Bi), consistent with the corresponding isochron age, which record the formation time of the Changle-Nanao ductile shear zone.The age overlap of samples at different closure temperatures indicates that as a result of the collision between the coastal areas of Fujian and Guangdong The Changle-Nan’ao ductile shear zone, one of the main belts, experienced a rapid initial cooling increase after its formation (107-118 Ma). Combined with the K-Ar age of K-Ar and relevant chronological data, 107 ~ 70 Ma) cooling rate of increase has slowed down, about 0.18 ~ 1.12mm / a.