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- Title
From migmatites to crustal granites: Pb-Pb isotopic system of feldspars of partial melting products, Northern Ladoga region, Fennoscandinavian Shield.
- Authors
Baltybaev, Sh.; Ovchinnikova, G.; Glebovitskii, V.; Vasil'eva, I.; Rizvanova, N.
- Abstract
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/Pb 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 ɛ( t) lower value of granites of this pluton relative to those of other plutons of the region.
- Subjects
BALTIC Shield; MIGMATITE; LEAD isotopes; GRANITE; FELDSPAR; GEOCHEMISTRY; MAGMAS
- Publication
Doklady Earth Sciences, 2016, Vol 468, Issue 2, p541
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X16060015