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