MANTLE COMPONENTS OF CARBONATITES FROM THE KOLA ALKALINE PROVINCE, RUSSIA AND FINLAND - A ND-SR STUDY

被引：0
|
作者：
KRAMM, U
机构：
来源：
EUROPEAN JOURNAL OF MINERALOGY | 1993年 / 5卷 / 05期
关键词：
CARBONATITES; MANTLE COMPONENTS; ND-SR ISOTOPE CORRELATION; KOLA ALKALINE PROVINCE;
D O I：
暂无
中图分类号：
P57 [矿物学];
学科分类号：
070901 ;
摘要：
Nd and Sr isotope compositions of Kola carbonatites provide evidence for a magma formation through mixing of two mantle components. In the Sr - Nd correlation diagram in is-an-element-of-notation the Kola Carbonatite Mixing Line (KCL) has a slope of -0.372 +/- 0.082 and passes through the composition of bulk earth. The KCL is distinctly different from the East African carbonatite line (EACL). Whereas the enriched component might be similar to one proposed for the East African carbonatites, the depleted component by contrast corresponds to the source of the Canadian carbonatites of the Grenville and the Superior province which plots off the loNd array.
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页码：985 / 989
页数：5
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