Occurrence and provenance of ion-adsorbed rare earth elements mineralization in alumina-rich rocks of the Permian Heshan formation, Western Guangxi, China - Chunfang Dong; Zhixuan Han; Xiaocheng Wei; Junhong Liu; Haonan Zhao; Zhiyan Gu; Bimin Zhang; Cheng Xu (Applied Geochemistry, 2025)