Petrogenesis and Dating of Two Types of Granite from North Qilian, China
Two types of granitic intrusives occur in the lower Paleozoic strata in north Qilian. One is the hornblendebearing granitic body in Jingzichuan, characterized by the REE total of 90× 10-6-106× 10-6, LREE/HREE ratio of less than 8 (ranging from 6.9 to 7.8) and zircon SHRIMP age of 464 Ma. These intrusives have island-arc affinity. The other is biotite-bearing granitic body in Huangyanghe with the REE total of 214× 10-6-250× 10-6, LREE/HREE ratio of more than 8 (ranging from 8.2 to 9.7) and zircon LA-ICP-MS age of 383 Ma. They were tectonically intruded in a post-collisional or within-plate environment.
作 者： WU Cailai SHI Rendeng YANG Jingsui YANG Hongyi Joseph L.Wooden ZHENG Qiuguang CHENG Shengyong 作者单位： WU Cailai,SHI Rendeng,YANG Jingsui,CHENG Shengyong(Continental Dynamics Laboratory, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China)YANG Hongyi,ZHENG Qiuguang(Chungkung University, Tainan, Taiwan, China)
Joseph L.Wooden(Stanford University, USA)
刊 名： 地质学报（英文版） SCI 英文刊名： ACTA GEOLOGICA SINICA 年，卷(期)： 2005 79(2) 分类号： 关键词： north Qilian granite zircon dating