标题：The chemical composition and industrial quality of Barite mineralization in Calabar flank, Oban Massif, Mamfe embayment and Obudu Plateau, southeastern Nigeria
摘要：Barite occurrences in the Calabar Flank, Oban massif, Mamfe Embayment and Obudu Plateau of Southeastern Nigeria have been sampled and analyzed for the purpose of assessing their chemical composition andindustrial quality. Barite occurrences were observed mostly along faults and unconformities marking the boundaries between the Precambrian basement rocks of Oban and Obudu massifs and the Cretaceous sediments of the Calabar Flank and Mamfe embayment. Occurrences were also observed within the sediments. The chemical data show that BaSO4, SiO2 and TiO2 are the major chemical species of the barite. The Ba and SO4 content vary between 53.62 – 56.10 wt% and 27.57 – 39.35 wt% respectively across the sampled areas. The specific gravity is 4.45 and thiscombined with high BaSO4 (approximately 94 wt%) shows that the mineralization is of high industrial quality and compares favourably with the Azara barite deposits of the Benue Trough. The quality of the barite meets American Petroleum institute (API) requirements for use as drilling mud.
关键词：Barite;mineralization;quality;chemical composition;southeastern Nigeria.
