Petrogenesis of the Weiling beryl-bearing granitic pegmatite – A giant LCT-type pegmatite in the Northern Wuyi area, South China

•Weiling granitic pegmatite is a super-large LCT-type pegmatite in South China.•Pegmatitic muscovite yielded an Ar-Ar age of 405.33 ± 3.38 Ma, indicating an Early Devonian emplacement age.•Weiling pegmatite most likely evolved from anatectic melts that did not experience significant fractionation.•Origin by low degrees of muscovite dehydration partial melting of crustal lithologies rich in fluxing metals is proposed.