Petrogenesis of 1.76 Ga Pyroxene Diorite in Wutai Mountains Area of North China Craton and Its Geological Significance
详细信息
- 责任者：Zhou Liqin (Chengdu University of Technology ; Chengdu 610059 ; China) ; Xiao Yuanfu
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2011
- 卷期：30(5)
- 关键词：辉石闪长岩 ; pyroxene diorite ; 五台山 ; Wutai Mountains
- 页码：p.819-828
- 图表：8 illus., 3 tables, 50 refs.
- 分类号：0801
- 出版序号：253
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
摘要
The Huangjinshan pyroxene diorite intruded Paleoproterozoic Hutuo Group, and was cut and penetrated by late Paleoproterozoic dolerite in Wutai Mountains area. Based on a comprehensive analysis of all evidence, the authors hold that Huangjinshan pyroxene diorite was partially melted from enriched upper lithosphere mantle related to the mantle plume and was fractionally crystallized with the same magmatic source of mafic dyke swarms widely distributed in North China Craton, thus representing a different stage of the same magmatic cycle. Zircons in pyroxene diorite samples show the same characteristics as basic-intermediate rocks, but their Th/U ratios are very low, similar to features of the metamorphic zircon.