Composition of melt inclusions and age of zircons of plagiogneisses from the Kola Superdeep Borehole
| Cobertura |
LATITUDE: 69.395917 * LONGITUDE: 30.610367 |
|---|---|
| Data(s) |
05/09/2006
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| Resumo |
A comprehensive study of melt inclusions and SHRIMP dating of zircons from trondhjemite gneisses of the sequence VIII from the Kola Superdeep Borehole has revealed presence of old primary magmatic crystals with age up to 2887+/-15 Ma. This is not consistent with the previous view, according to which the oldest zircons from the Archean Complex in SG-3 are products of granulite metamorphism. Primary magmatic zircons of early generation (from 2887 to 2842 Ma) formed in deep-seated magma chambers during partial crystallization of CO2-saturated trondhjemite estimates on duration of generation of tonalite-trondhjemite-granite melts through partial melting of mafic rocks. |
| Formato |
application/zip, 2 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.788243 doi:10.1594/PANGAEA.788243 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Chupin, VP; Vetrin, VR; Rodionov, NV; Matukov, DI; Berezhnaya, NG; Sergeev, SA; Mitrofanov, FP; Smirnov, YuP (2006): Composition of melt inclusions and age of zircons from plagiogneisses of the Archean complex in the Kola Superdeep Borehole, Baltic Shield. Translated from Doklady Akademii Nauk, Ser. Geol., 2006, 406(4), 533-537, Doklady Earth Sciences, 406(4), 153-157, doi:10.1134/S1028334X06010363 |
| Palavras-Chave | #1 sigma; 206Pb; 206Pb/238U; 206Pb/238U e rel; 207Pb/235U; Age, error; Age, mineral; Age e; Age mineral; Al2O3; Al2O3/(CaO + Na2O + K2O), molecular; Aluminium oxide; Archive of Ocean Data; ARCOD; Calcium oxide; Calculated; CaO; Chlorine; Cl; Coeff; Coefficient; dated from 207Pb/206Pb; Depth; DEPTH, sediment/rock; F; FeO; Fluorine; for 206Pb*; for 207Pb*; Hafnium oxide; HfO2; in zircon near the inclusion; Iron oxide, FeO; K2O; K2O/Na2O; Kola Peninsula; Label; Lab no; Lead 206; Lead 206/Uranium 238; Lead 206/Uranium 238, error relative; Lead 207/Uranium 235; Lead 207/Uranium 235, error relative; Magnesium oxide; Mass spectrometry; MgO; Na2O; of correlation for 207Pb*/235U � 206Pb*/238U ratios.; Potassium oxide; Potassium oxide/Sodium oxide ratio; radiogenic, Pb*; Ratio; RDRILL; Rock drill; Sample, optional label/labor no; Sample code/label; Sample position; Sample type; Samp pos; Samp type; Sensitive high-resolution ion microprobe (SHRIMP); SG-3; Silicon dioxide; SiO2; Sodium oxide; Sum; Th; Th/U; Thorium; Thorium/Uranium ratio; TiO2; Titanium oxide; total; U; Uranium |
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Dataset |
