Fluid Inclusion Study of the Shijia Gold Deposit in Northwestern Guangxi, China

Characterizing a new type of nelsonite recognized in the Damiao anorthosite complex, North China Craton, with implications for the genesis of giant magmatic Fe-Ti oxide deposits

“…Apatite is euhedral and equigranular with crystal size ranging from 0.2 to 5 mm. Fluid inclusions are widely developed in apatite, and yielded homogenization temperatures of 180-420°C and salinities of 6.2-38.9 wt% NaCl equivalent (Li et al 2010).…”

“…Considering that the nelsonite dikes or veins are controlled by fractures developed in early-stage anorthosite and commonly show chlorite-dominated alteration in the contact zone on both sides, hydrothermal processes have probably played a part in forming these features (Li et al, 2010). Based on the behavior of zirconium and silicon in magmatichydrothermal system and fluid inclusion studies, Li et al (2019b) proposed that the Fe-Ti-P mineralization involved hydrous melts and magmatic-hydrothermal processes, with the Fe-Ti oxides being formed at the magmatic stage and apatite at the hydrothermal stage.…”