Genetic Feature of Monazite and Its U-Th-Pb Dating: Critical Considerations on the Tectonic Evolution of Sanjiang Tethys
详细信息
- 责任者：Qiu Kunfeng (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Yang Liqiang
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(9)
- 关键词：独居石 ; monazite ; 钍—铀计时 ; Th-U dating ; 铀—铅计时 ; U-Pb dating ; 构造演化 ; structural evolution ; 云南 ; Yunnan Province
- 页码：p.2721-2732
- 图表：6 illus., 2 tables, 77 refs.
- 分类号：1300
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Monazite U-Th-Pb dating plays an important role in isotopic geochronology study. Identification of the genesis and interpretation of the age for monazites are the points. The internal texture, mineral assemblage, REE and trace element features are compared in detail in the paper to determine the identification of magmatic, hydrothermal and sedimentary monazites. In addition, they are both distinguished from magmatic monazites by their low trace elements content, Th/U ratio which has no stable correlation with that in zircon, enrichment in ∑REE and La, Ce, relatively poor in light rare earth elements and Sm, and Gd, and display typical tetrad effect REE distribution pattern.