Formation and Evolution of a Magmatic System in a Rifting Continental Margin: Neoproterozoic Arc- and MORB-like Dike Swarms in South China

Mafic magmas generated in extensional tectonic settings preserve important information about the nature of their mantle sources, interactions between crust and mantle, and the processes associated with magmatic evolution. However, careful study is needed to interpret the complex petrogenesis and diverse origins of such rock suites. A large volume of c.650 Ma mafic and ultramafic dikes are found in the South Qinling Belt (SQB) along the northern...