Geochemical characteristics of the siliceous rocks in the Lifang barite deposit, Fujian Province, and its implications for tectonic settings

In order to understand the genesis and tectonic settings of the Lifang barite deposit, this study carried out major elements, rare earth elements and trace elements analysis for nine siliceous rocks samples from the deposit. The results show that baritized siliceous rocks are rich in Al, Ti, Fe, Mn, Mg, and roof siliceous rocks are rich in Al, Fe and poor in Mn, Ti and Mg. Both siliceous rocks are characterzied by relatively low ΣREEs(but rich LREEs), weak negative to positive Eu anomalies and negative to weak positive Ce anomalies, and enrichment of Ba, Sr, Rb and Th, and depletion of Ta, Hf and Y. The siliceous rocks in the Lifang barite deposit was hydrothermal in origin, and deposited in the tectonic settings of continental margin and affected by addition of continental material during sedimentation.