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利用同一样品中封闭温度不同的锆石 U-Pb,全岩 Rb-Sr以及白云母、黑云母和钾长石的K-Ar定年结果,讨论了晚中生代漳州复式岩体中新村晶洞花岗岩的热演化特征.从锆石开始结晶到黑云母K-Ar体系保持封闭,岩体的冷却速率(11.0℃/Ma)和抬升速率(0.07mm/a)较慢,随后至钾长石K-Ar体系保持封闭,冷却速率(45℃/Ma)和抬升速率(0.36 mm/a)增加.新村岩体冷却速率先慢后快的特点可能同晚中生代时期福建沿海具有异常高的古地热梯度和新生代初期古地热梯度明显降低有关.
Using the K-Ar dating results of zircon U-Pb, Rb-Sr, and muscovite, biotite and potassium feldspar with different sealing temperatures in the same sample, we discussed the K-Ar dating of the Xinjingcun gens in the Late Mesozoic complex in Zhangzhou Thermal evolution characteristics. From the beginning of zircon crystallization to biotite K-Ar system remained closed, the rock cooling rate (11.0 ℃ / Ma) and lifting rate (0.07mm / a) slow, and then to the K-Ar K-Ar system Closed, the cooling rate (45 ℃ / Ma) and the lifting rate (0.36 mm / a) increased. The cooling rate of Xincun rock mass after the first slow and then fast may be related to the unusually high paleo-geothermal gradient along the coast of Fujian in the late Mesozoic and the significant decrease of paleo-geothermal gradients in the early Cenozoic.