Petrogenesis of the Neoarchean Granitoid Gneisses in Northern Hebei Province
详细信息
- 责任者：Liu Shuwen (Key Laboratory of Orogenic Belts and Crustal Evolution ; MOE ; Peking University ; Beijing 100871 ; China) ; LvYongjun
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(4)
- 关键词：花岗质片麻岩 ; granitic gneiss ; 河北 ; Hebei Province
- 页码：p.909-921
- 图表：10 illus., 4 tables, 24 refs.
- 分类号：0802
- 出版序号：844
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The northern Hebei Province is one major exposure region of Early Precambrian metamorphic basement of North China Craton. LA-ICP-MS zircon U-Pb and Lu-Hf isotopic analyses for the monzogranitic gneiss yield a discordant upper intercept age of (2 509 ± 10) Ma, reflecting its crystallization age. The geodynamic processes producing these Neoarchen granitic gneisses suggest that their tectonic background are analogous to the west coast of South America, implying a transitional geodynamic regime from convergent compression to back-arc extension in the northern Hebei Province.