The paleoproterozoic Monchetundra mafic massif (Kola Peninsula): New geological and geochronological data

被引：5

作者：

Borisenko, E. S. ^{[1
]}

Bayanova, T. B. ^{[1
]}

Nerovich, L. I. ^{[1
]}

Kunakkuzin, E. L. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Kola Sci Ctr, Inst Geol, Apatity 184200, Russia

[2] Murmansk State Tech Univ, Murmansk, Russia

来源：

DOKLADY EARTH SCIENCES | 2015年 / 465卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

Baddeleyite - Different ages - Four-group - Isotopic dating - Kola Peninsula - Paleoproterozoic - Rock types;

D O I：

10.1134/S1028334X1511001X

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In view of the absence of an unambiguous intrusive contact between the main mafic rocks varieties in the Monchetundra massif, the latter was considered for a long time as a large complex of syngenetic mafic rocks. On the basis of data derived from study of the outcrops and drill core samples, researchers defined various numbers of zones characterized by certain rock types. The results of geological-petrographic investigations and data on the U-Pb system in zircon and baddeleyite provided grounds for revision of the views on the structure of the massif: at least four groups of different ages of mafic rocks are now definable in the Monchetundra massif. In this communication, we discuss the relations between two groups of mafic rocks and the results of their U-Pb isotopic dating, which imply a long multiphase formation of the massif.

引用

页码：1107 / 1111

页数：5

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