Petrogenesis and tectonic implications of Tonian island arc volcanic rocks from the Gabgaba Terrane in the Arabian-Nubian Shield (NE Sudan)
Journal of Asian Earth Sciences(2022)
Abstract
•The volcanic rocks in the Gabgaba Terrane were erupted during Tonian.•The volcanic rocks have positive εHf(t) values, indicative of derivation from a juvenile arc magmatism.•The depleted mantle source was metasomatized by slab-dehydration fluids.•The primitive magma was subjected to crustal assimilation prior to eruption.•The volcanic rocks were erupted during different stage of arc maturity.
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Key words
Zircon U-Pb dating,Lu-Hf isotope,Tonian,Subduction,Gabgaba Terrane,NE Sudan,Andesitic rocks,Island arc
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