The evolution about the granitic rock in the Mobile continent edge
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摘要:
本文通过对产在活动大陆边缘的福州复式岩体的花岗岩类中的锆石进行LA-ICP-MS U－Pb定年：早期的涧田花岗闪长岩、中期的丹阳二长花岗岩－福州钾长花岗岩和晚期的魁歧晶洞碱性花岗岩，年龄分别为110Ma、100-107 Ma 、95 Ma，属于燕山晚期，相当于早白垩世中晚期。说明产在活动大陆边缘的福州复式岩体，从早期的钙碱性I型花岗岩，到晚期的碱性A型花岗岩，其侵位时间，即从早白垩世中-晚期，到晚白垩世早期。同时亦表明产在活动大陆边缘的复式岩体，岩浆作用时间持续了15 Ma。
Abstract:
The LA-ICP-MS U-Pb dating technique was applied to the granitic rock in the Fuzhou compound rock mass that were producted from the mobile continent edge . The results show that the mean U-Pb age of the early Jiantian granodiorite is about 110Ma, the mean U-Pb age of the medium-term Danyang monzonitic granite and Fuzhou moyite is about 100-108Ma and the mean U-Pb age of the later period Kuaiqi miarolite is about 94Ma, belonging to the later Yenshan period. The time corresponds to the medium-late period of the early Cretaceous. It shows that the emplacement time about Fuzhou compound rock mass is from the medium-late period of the early Cretaceous to the early period of the late Cretaceous. The emplacement rock are from the mobile continent edge. Its magmatism time persistents 15Ma.
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林清茶, 程雄卫, 张玉泉, 汪方跃.2011.活动大陆边缘花岗岩类演化-以福州复式岩体为例[J].地质学报,85(7):1128-1133. LIN Qingcha, CHENG Xiongwei, ZHANG Yuquan, WANG Fangyue.2011. The evolution about the granitic rock in the Mobile continent edge[J]. Acta Geologica Sinica,85(7):1128-1133.
