Annual technical report on EL 25080 Lake Amadeus Northern Territory annual report for the year ending 08 October 2007

Abstract

This report details all exploration activity carried out during the year ended 8 October 2007. During this period, investigations were completed with a view to selecting targets for potash exploration and limited sampling of the salt water brines. EL 25080 was granted to Tyson Resources Pty Ltd on 8 October 2006 for a period of six years. It comprises 418 blocks encompassing a total area of 1304 sq km. In October 2005 Tyson Resources sold the tenement to Holocene Pty Ltd, a wholly subsidiary of Reward Minerals Ltd. Reward Minerals is the operator/manager. Between 1990 and 1998, Emily Enterprises/Northern Territory Evaporites investigated possibilities of harvesting evaporite minerals and other useful products from playa salt lake sediments or from the evaporation of the brines. They found that large reserves of micritic calcite were available in the calcrete deposits of the area. A trial to produce mirabilite was conducted in 1997 by the construction of a small pan ie 3.5m x 8m x 0.3m which was filled with brine, with the removal of the brine producing 1680kg of mirabilite. A small drilling program was carried out to test brine levels. A total of 18 shallow holes were drilled to test for playa type shallow gypsum deposits. Gypsum was intersected within 1m and was generally 3 to 4 metres thick. The gypsum content was generally 70-85%. Trench samples obtained indicated a Ca SO4 2H2O content varying from 70 to 80%. In the current term, Between 1990 and 1998, Emily Enterprises/Northern Territory Evaporites investigated possibilities of harvesting evaporite minerals and other useful products from playa salt lake sediments or from the evaporation of the brines. They found that large reserves of micritic calcite were available in the calcrete deposits of the area. A trial to produce mirabilite was conducted in 1997 by the construction of a small pan ie 3.5m x 8m x 0.3m which was filled with brine, with the removal of the brine producing 1680kg of mirabilite. A small drilling program was carried out to test brine levels. A total of 18 shallow holes were drilled to test for playa type shallow gypsum deposits. Gypsum was intersected within 1m and was generally 3 to 4 metres thick. The gypsum content was generally 70-85%. Trench samples obtained indicated a Ca SO4 2H2O content varying from 70 to 80%.