Zircon U-Pb Ages, Hf Isotopic Characteristics of the Yongqinglinchang-Shibazhan Granites in the Northern Greater Hinggan Mountains, Northeastern China

详细信息   

• 责任者：Ren Bangfang (Tianjin Institute of Geology and Mineral Resources ; CGS ; Tianjin 300170 ; China) ; Sun Lixin
• 刊名：Geological Survey and Research
• 出版年：2012
• 卷期：35(2)
• 关键词：花岗闪长岩 ; granodiorites ; 铀—铅计时 ; U-Pb dating ; 铪同位素 ; hafnium isotopes ; 大兴安岭 ; Greater Hinggan Mountains
• 页码：p.109-117
• 图表：4 illus, 2 tables, 24 refs.
• 分类号：0801
• issnNo：ISSN1672-4135
• isbnNo：CN12-1353/P

摘要

The Yongqinglinchang-Shibazhan granites are located in the Eerguna block in the northeastern Greater Hinggan Mountains, and mainly consist of granodiorite, with minor adamellite and quartz diorite.  Combined with previous zircon Hf isotope data obtained from Early Paleozoic and Mesozoic granites in the Eerguna block, the authors hold that the granites have the similar model ages although they were formed in different geological ages. Meanwhile it indicates that the crustal accretion event of Eerguna block occurred mainly in Middle and Neo-Proterozoic period. Previous studies indicate that the Hinggan block accreted in Neoproterozoic-Phanerozoic. It suggests that they have the different tectonic natures and evolvement history.