Identification and significance of "gneissic" magma-mixed complex in the Changle－Nan'ao fault zone, southeastern Fujian, China

Various magma-mixed plutonic rocks formed by physical and chemical mixings in Cretaceous dioritic and monzogranitic magmas have been discerned in the Changle－Nan'ao Fault Zone of southeastern Fujian Province during recent regional geological surveys. Magma-mixed rocks and their two end-member rocks comprise magma-mixed complex, and underwent stress affect after emplacement. They were misunderstand as migmatites or gneissic granites formed by metamorphism and deformation for a long period due to their specific texture. This paper describes field geologic appearances of magma-mixed complex exposed in Xiaocuo of Quanzhou and Gaoshan of Fuqing, their petrological diversities with typical both deformed granite in Putian and granitic gneiss in Fuqing, and infers that magma-mixed plutonic rocks were emplaced in an extensional setting during early period of Early Cretaceous, earlier than main metamorphism-deformation phase.