U-Pb Ages of the Zircons from Primary Rocks in Middle-Northern Great Higgan Mountains and Its Implications to Geotectonic Evolution
详细信息
- 责任者：She Hongquan (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Li Jinwen
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(2)
- 关键词：花岗岩 ; granite ; 大兴安岭 ; Greater Hinggan Mountains
- 页码：p.571-594
- 图表：12 illus., 4 tables, 74 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The authors of the paper collected 2 636 zircon ages determined by U-Pb dating from 123 samples in middle-northern Greater Hinggan Mountains. It is concluded that a large amount of zircon ages determined by U-Pb dating method for primary rocks also can be applied to study the geotectonic evolution history, just like the zircon ages from rivers detrita. Study on the statistics on zircon ages, granite association and tetonics indicates a very complicated tectonic evolution history has been taken place in middle-northern Greater Hinggan Mountains, that is, the formation of basement in Plaeoprotozoic, growth of continental crust in Neoprotozoic, breakdown of plate in the end of Neoprotozoic, subdution, spreading, accretion and collision between miroplates in Paleozoic, continental collision in Early Mesozoic, postorogenic extension and collapse in Late Mesozoic related to the Mongolia-Okhotsk orogeny and continental marginal tectonic-magmatic event related to the subdution of West Pacific Ocean in Mesozoic.