Rare-metal syenites of the Ukrainian Shield

被引:0
|
作者
Kryvdik, SG [1 ]
机构
[1] Natl Acad Sci Ukraine, Inst Geochem Mineral & Ore Format, UA-03142 Kiev, Ukraine
关键词
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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
The Ukrainian Shield contains unusual, nepheline-free rare-metal syenites. Differentiated (layered) intrusions of these rocks host two deposits rich in Zr, REE, and Y:Azovskoe and Yastrebetskoe. The rare-metal syenites typically bear Fe-rich mafic minerals (fayalite, hedenbergite, aegirine-hedenbergite, aegirine, ferro-hastingsite, katophorite, riebeckite, and annite) and are characterized by high background concentrations of Zr (0.1-0.3%) and REE (0.05-0.2%). The rocks are genetically and spatially related to anorthosite-rapakivi plutons.
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页码:639 / 648
页数:10
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