EL 4968, annual report on exploration Alexandria Station NT for period ending 27/06/1987.

Abstract

This work is part of much larger search by Northern Cement to locate high-grade gypsum in economically viable quantities. The area of the EL attracted attention because of the gypsum crystals exposed during the building of turkey's nest dams in the black soil plains. A ground reconnaissance found gypsum at No 6 and 18 Mile waterholes and in the soil near No 6 waterhole. Gypsum occurs as large twinned crystals or clusters of crystals and more-importantly as a rock layer up to 3 m thick immediately beneath the black soil which ranges up to 2 m thick. Drilling is recommended.