Amalgamation of South China into Rodinia during the Grenvillian accretionary orogeny: Geochemical evidence from Early Neoproterozoic igneous rocks in the northern margin of the South China Block

•Zircon U-Pb ages of plagiogranite, basaltic andesite and gabbro-diorite in the Mianlue ophiolite are 905 ± 8 Ma, 936 ± 6 Ma and 950 ± 5 Ma.•They represent an intra-oceanic subduction system in the northern margin of South China.•South China was assembled into Rodinia through a Grenvillian accretionary orogen.