The Role of Recycled Oceanic Crust in the Generation of Alkaline A‐Type Granites

Melting and dehydration of subducted oceanic slabs dominate element recycling within the subduction factory, but the role of recycled oceanic crust in the source of intraplate magmas is poorly understood. In situ zircon O‐Hf isotope data from two Early Cretaceous alkaline A‐type granites that are genetically related to large‐scale extension of eastern China in the Late Mesozoic (circa 125 Ma) yield low δ 18 O (1.8 ± 0.3‰ to 5.1 ± 0.3‰, 2 σ ) and...