IMPACT OF GEOLOGICAL VARIABLES ON GYPSUM MINERALISATION: ASSESSMENT OF THE GUYUK GYPSUM OCCURRENCES, N. E. NIGERIA.

Field observations are used to assess the impact of geomorphic, lithologic and physicochemical to ascertain their extent of control on gypsum formation and accumulation in Guyuk area. Varying quantities of gypsiferous beds are associated with mainly mudstone and highly fossiliferous – fissured limestone at depths between 0.02 to 9.12m and altitude 219.3 – 473.62m. Integration of the field evidences reveal that gypsum mineralisation is not restricted to a particular depth/altitude range rather its absence or copious occurrences depend on presence of limestone beds in the area. Inductively, dolomitization is given as the process of gypsum mineralisation in Guyuk area.