摘要
位于广西南部钦州地区的那丽岩体是华南地区(除海南岛外)报道的、具精确同位素年龄的海西期花岗岩岩体,LA-ICP-MS锆石U-Pb定年结果显示其形成时代为262Ma。二叠纪时期,羌塘-中缅Sibumasu地块与印支地块碰撞拼合,导致华南陆块俯冲于印支陆块之下,那丽花岗岩可能形成于这种俯冲作用的较晚阶段——弧后伸展环境。
This paper reported the recent discovery of Hercynian granite at Nali of Qinzhou in Guangxi. The Nali granitic body has crystallization ages of 262Ma obtained by LA-ICP-MS zircon U-Pb method. In Permian period, the collision between Qiangtang- Sibumasu block and Indochina block resulted in the thrusting of South China block beneath Indochina block. The Nali granites were generated at the late stage of this subduction, probably in a back-arc extension setting.
出处
《地质通报》
CAS
CSCD
北大核心
2012年第1期82-89,共8页
Geological Bulletin of China
基金
中国地质调查局基础地质综合研究项目<南岭成矿带基础地质综合研究>(编号:k201024)
关键词
钦州地区
海西期
那丽花岗岩
弧后伸展环境
Qinzhou area Hercynian Nali granite back-arc extension background
