Abstract The alkaline Cho Don complex in NE Vietnam comprises several mafic-felsic suites related to the widespread magmatism developed during early-Permian–late-Triassic. contribution explores petrogenesis of nepheline syenite from Bang Phuc massif and its petrogenetic relationship with cogenetic scapolite-rich gabbro. formed through fractional crystallization pristine mantle-derived basaltic ...

Luku alkali syenite is distributed throughout the southern end of Hongge basic-ultrabasic intrusion in Panzhihua, Sichuan, SW China. Using LA-ICP-MS, yielded a zircon U-Pb age 264.5 ± 1.6 Ma, concordant with ages E'meishan large igneous province (260 Ma). The displayed silica-saturated, Al-adequate and alkali-rich signatures, SiO2 62.07%–64.04%, Al2O3 16.26%–16.79% Na2O + K2O 9.17%–9.91% (avera...