From migmatites to crustal granites: Pb-Pb isotopic system of feldspars of partial melting products, Northern Ladoga region, Fennoscandinavian Shield

被引：3

作者：

Baltybaev, Sh. K. ^{[1
]}

Ovchinnikova, G. V. ^{[1
]}

Glebovitskii, V. A. ^{[1
,2
]}

Vasil'eva, I. M. ^{[1
]}

Rizvanova, N. G. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Precambrian Geol & Geochronol, Nab Makarova 2, St Petersburg 199034, Russia

[2] St Petersburg State Univ, Univ Skaya Nab 7-9, St Petersburg 199034, Russia

来源：

DOKLADY EARTH SCIENCES | 2016年 / 468卷 / 02期

关键词：

SOUTHERN FINLAND; BALTIC SHIELD; DURATION; MODEL; BELT; ZONE;

D O I：

10.1134/S1028334X16060015

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The isotopic-geochemical features of late and postorogenic granites of the S type and ambient migmatites are studied within the Russian part of the Svecofennian orogen of the Fennoscandinavian Shield. The spatial association of leucosomes of migmatites and granites of the S type and their similar petro- and geochemistry and distribution of Pb isotopes are evidence of the genetic similarity of their parental melts. The Borodinskoe pluton has a more primitive Pb-206/Pb-207 ratio, which indicates the presence of upper and U-poor lower crustal material in the source of granitic magmas. This conclusion is supported by the E >(Nt)(t) lower value of granites of this pluton relative to those of other plutons of the region.

引用

页码：541 / 544

页数：4