2.1 Ga Crustal Remelting Event in Hengshan Complex: Evidence from Zircon U-Pb Dating and Hf-Nd Isotopic Study on Potassic Granites
详细信息
- 责任者：Zhao Ruifu (State Key Laboratory of Lithospheric Evolution ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Guo Jinghui
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(6)
- 关键词：花岗岩 ; granite ; 片麻岩 ; gneisses ; 铀—铅计时 ; U-Pb dating ; 恒山 ; Hengshan Mountains
- 页码：p.1607-1623
- 图表：6 illus., 4 tables, 43 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The Hengshan Complex in the central zone of the North China Craton, which is a typical high-grade terrain and experienced 1.85 Ga high-pressure granulite facies metamorphism, composes of ~2.5 Ga TTG gneisses and some paragneisses. A suite of potassic granites in this complex is investigated, which mainly consists of hornblende monzogranitie and biotite monzogranite. Zircon grains from a hornblende monzogranite sample yield a weighted average 207Pb/206Pb age of (2 052±17) Ma by LA-ICP-MS and (2 084±4) Ma by SIMS. This paper confirms a Paleoproterozoic (~2.1 Ga) crust remelting event in Hengshan Complex, which may occur in an extensional setting in the North China Craton.