Zircon Hf isotope perspective on the origin of granitic rocks from eastern Bavaria, SW Bohemian Massif

2009 ◽  
Vol 99 (5) ◽  
pp. 993-1005 ◽  
Author(s):  
Wolfgang Siebel ◽  
Fukun Chen
Keyword(s):  
Bohemian Massif ◽  
Hf Isotope ◽  
Granitic Rocks ◽  
Zircon Hf Isotope

U-Pb geochronology of Paraná volcanics combined with trace element geochemistry of the zircon crystals and zircon Hf isotope data

2019 ◽  
Vol 89 ◽  
pp. 219-226 ◽  
Author(s):  
Léo A. Hartmann ◽  
Sérgio B. Baggio ◽  
Matheus P. Brückmann ◽  
Daniel B. Knijnik ◽  
Cristiano Lana ◽  
...  
Keyword(s):  
Trace Element ◽  
Hf Isotope ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Isotope Data ◽  
Zircon Hf Isotope

The growth of the continental crust: Constraints from zircon Hf-isotope data

Lithos ◽  
2010 ◽  
Vol 119 (3-4) ◽  
pp. 457-466 ◽  
Author(s):  
E.A. Belousova ◽  
Y.A. Kostitsyn ◽  
W.L. Griffin ◽  
G.C. Begg ◽  
S.Y. O'Reilly ◽  
...  
Keyword(s):  
Continental Crust ◽  
Hf Isotope ◽  
Isotope Data ◽  
Zircon Hf Isotope

scholarly journals Clarifying the zircon Hf isotope record of crust–mantle evolution

2016 ◽  
Vol 425 ◽  
pp. 65-75 ◽  
Author(s):  
Jeffrey D. Vervoort ◽  
Anthony I.S. Kemp
Keyword(s):  
Hf Isotope ◽  
Mantle Evolution ◽  
Zircon Hf Isotope ◽  
Isotope Record

Deciphering the petrogenesis of deeply buried granites: whole-rock geochemical constraints on the origin of largely undepleted felsic granulites from the Moldanubian Zone of the Bohemian Massif

2004 ◽  
Vol 95 (1-2) ◽  
pp. 141-159 ◽  
Author(s):  
Vojtěch Janoušek ◽  
Fritz Finger ◽  
Malcolm Roberts ◽  
Jiří Frýda ◽  
Christian Pin ◽  
...  
Keyword(s):  
Bohemian Massif ◽  
Granitic Rocks ◽  
Granitic Magma ◽  
Moldanubian Zone ◽  
Trace Element Contents ◽  
High Grade Metamorphism ◽  
Early Palaeozoic ◽  
High Level ◽  
Geochemical Constraints ◽  
Variation Trends

ABSTRACTThe prominent felsic granulites in the southern part of the Bohemian Massif (Gföhl Unit, Moldanubian Zone), with the Variscan (∼340 Ma) high-pressure and high-temperature assemblage garnet+quartz+hypersolvus feldspar ± kyanite, correspond geochemically to slightly peraluminous, fractionated granitic rocks. Compared to the average upper crust and most granites, the U, Th and Cs concentrations are strongly depleted, probably because of the fluid and/or slight melt loss during the high-grade metamorphism (900–1050°C, 1·5–2·0 GPa). However, the rest of the trace-element contents and variation trends, such as decreasing Sr, Ba, Eu, LREE and Zr with increasing SiO2 and Rb, can be explained by fractional crystallisation of a granitic magma. Low Zr and LREE contents yield ∼750°C zircon and monazite saturation temperatures and suggest relatively low-temperature crystallisation. The granulites contain radiogenic Sr (87Sr/86Sr340 = 0·7106–0·7706) and unradiogenic Nd ( = − 4·2 to − 7·5), indicating derivation from an old crustal source. The whole-rock Rb–Sr isotopic system preserves the memory of an earlier, probably Ordovician, isotopic equilibrium.Contrary to previous studies, the bulk of felsic Moldanubian granulites do not appear to represent separated, syn-metamorphic Variscan HP–HT melts. Instead, they are interpreted as metamorphosed (partly anatectic) equivalents of older, probably high-level granites subducted to continental roots during the Variscan collision. Protolith formation may have occurred within an Early Palaeozoic rift setting, which is documented throughout the Variscan Zone in Europe.

Zircon Hf isotope signature of the depleted mantle in the Myanmar jadeitite: Implications for Mesozoic intra-oceanic subduction between the Eastern Indian Plate and the Burmese Platelet

Lithos ◽  
2009 ◽  
Vol 112 (3-4) ◽  
pp. 342-350 ◽  
Author(s):  
Guang-Hai Shi ◽  
Neng Jiang ◽  
Yan Liu ◽  
Xia Wang ◽  
Zhi-Yu Zhang ◽  
...  
Keyword(s):  
Hf Isotope ◽  
Indian Plate ◽  
Isotope Signature ◽  
Zircon Hf Isotope ◽  
Depleted Mantle

A combined zircon Hf isotope and whole-rock Nd and Sr isotopes study of Carboniferous A-type granites, Sierras Pampeanas of Argentina

2020 ◽  
Vol 100 ◽  
pp. 102545 ◽  
Author(s):  
Juan A. Dahlquist ◽  
Carmen Galindo ◽  
Matías M. Morales Cámera ◽  
Juan A. Moreno ◽  
Pablo H. Alasino ◽  
...  
Keyword(s):  
Hf Isotope ◽  
Sr Isotopes ◽  
Sierras Pampeanas ◽  
Zircon Hf Isotope ◽  
Nd And Sr Isotopes
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