FRACTIONATION OF MONAZITE IN THE DEVELOPMENT OF V-SHAPED REE PATTERNS IN LEUKOGRANITE SYSTEMS - EVIDENCE FROM A MUSCOVITE LEUKOGRANITE BODY IN CENTRAL AUSTRALIA

被引:48
作者
ZHAO, JX [1 ]
COOPER, JA [1 ]
机构
[1] UNIV ADELAIDE,DEPT GEOL & GEOPHYS,ADELAIDE,SA 5001,AUSTRALIA
关键词
D O I
10.1016/0024-4937(93)90003-U
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Geochemical modelling based on K(d) values for rare earth (REE) and other trace elements suggests that a Proterozoic muscovite leucogranite from the Atnarpa area, southeastern Arunta Inlier, central Australia was derived from a restite-free melt by simple but extensive crystal fractionation involving feldspars, biotite and accessory REE-rich minerals such as monazite and zircon at a pressure of 0.5-1.0 kbars and a temperature below 750-degrees-C. This study indicates that REE-rich accessory minerals, particularly monazite, play an important role in the evolution of the REE in high-Si, low temperature, granitic melt systems.
引用
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页码:23 / 32
页数:10
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