Geochemistry of Stable Oxygen and Hydrogen Isotopes in Minerals and Corundum-Bearing Rocks in Northern Karelia as an Indicator of Their Unusual Genesis

被引：14
|
作者：
Vysotskiy, S. V. [1 ,3 ]
Ignat'ev, A. V. [1 ]
Levitskii, V. I. [2 ]
Nechaev, V. P. [1 ]
Velivetskaya, T. A. [1 ]
Yakovenko, V. V. [1 ]
机构：
[1] Russian Acad Sci, Far East Geol Inst, Far East Div, Vladivostok 660022, Russia
[2] Russian Acad Sci, Ap Vinogradov Geochem Inst, Siberian Branch, Irkutsk 664033, Russia
[3] Far Eastern Fed Univ, Vladivostok 690950, Russia
来源：
GEOCHEMISTRY INTERNATIONAL | 2014年 / 52卷 / 09期
基金：
俄罗斯基础研究基金会;
关键词：
stable isotopes; oxygen; hydrogen; isotopic dating; corundum; Khitoostrov; Varatskoye; Karelia; BELOMORIAN MOBILE BELT; U-PB; METASOMATIC ROCKS; ORIGIN; AGE; FRACTIONATION; METAMORPHISM; CONSTRAINTS; KHITOSTROV; ECLOGITES;
D O I：
10.1134/S0016702914090109
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 paper presents newly obtained data on the oxygen and hydrogen isotopic composition of minerals in corundum occurrences and their host rocks in northern Karelia. Minerals in the Khitoostrov and Varaka corundum-bearing zones have extremely low delta O-18 (lower than -26 parts per thousand) and delta D (lower than -215 parts per thousand), which suggest that the mineral-forming process involved glacial waters and that the minerals preserve the isotopic ratios of their protolith. Aluminous corundum plagioclasites were produced by high-pressure Svecofennian (1.9-1.8 Ga) metamorphism of Paleoproterozoic rocks that had been metasomatized with the involvement of meteoric waters during the Guronian glaciation epoch.
引用
收藏
页码：773 / 782
页数：10
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