From migmatites to crustal granites: Pb–Pb isotopic system of feldspars of partial melting products, Northern Ladoga region, Fennoscandinavian Shield
| Autor: | Sh. K. Baltybaev, V. A. Glebovitskii, G. V. Ovchinnikova, N. G. Rizvanova, I. M. Vasil’eva |
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| Rok vydání: | 2016 |
| Předmět: |
010504 meteorology & atmospheric sciences
Pluton Partial melting Geochemistry 010502 geochemistry & geophysics Migmatite 01 natural sciences Genetic similarity Shield Earth and Planetary Sciences (miscellaneous) General Earth and Planetary Sciences Petrology Geology 0105 earth and related environmental sciences |
| Zdroj: | Doklady Earth Sciences. 468:541-544 |
| ISSN: | 1531-8354 1028-334X |
| DOI: | 10.1134/s1028334x16060015 |
| Popis: | 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 206Pb/207Pb 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 ɛNt(t) lower value of granites of this pluton relative to those of other plutons of the region. |
| Databáze: | OpenAIRE |
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