Neoarchaean Felsic Volcanic Rocks in Tracing Evolution of Arcs: An Insight from Geochemical Data of the Gadag Schist Belt, Western Dharwar Craton

Neoarchaean Felsic Volcanic Rocks in Tracing Evolution of Arcs: An Insight from Geochemical Data of the Gadag Schist Belt, Western Dharwar Craton

Quartz porphyry of rhyolitic composition though a volumetrically minor is an important component of metavolcanic successions in the Gadag schist belt in the western Dharwar craton. The quartz porphyries are calc-alkaline, enriched in light rare earth elements (La n /Yb n ~ 10–20) and with a strong n...

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Veröffentlicht in:Journal of the Geological Society of India 2021-04, Vol.97 (4), p.351-362
Hauptverfasser: Hedge, V. S., Corfu, Fernando, Frimmel, Hartwig E., Sawkar, R. H., Korkoppa, M. M.
Format: Artikel
Sprache:eng
Schlagworte:
Belts
Cratons
Earth and Environmental Science
Earth Sciences
Fractionation
Geochemistry
Geochronometry
Geology
Hydrogeology
Isotopes
Lava
Magma
Plate tectonics
Quartz
Radiometric dating
Rare earth elements
Rocks
Schist
Schists
Volcanic rocks
Zircon
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Zusammenfassung:Quartz porphyry of rhyolitic composition though a volumetrically minor is an important component of metavolcanic successions in the Gadag schist belt in the western Dharwar craton. The quartz porphyries are calc-alkaline, enriched in light rare earth elements (La n /Yb n ~ 10–20) and with a strong negative Eu anomaly (Eu/Eu* N =0.45–0.58). These features, coupled with high K 2 O/Na 2 O (0.8 to 1.46), low Nb/Th (
ISSN:0016-7622
0974-6889
DOI:10.1007/s12594-021-1693-3