Centrex Ltd (Centrex) is a minerals exploration company. Its project portfolio includes Oxley Potassium project in Mid-West 125km Western Australia southeast of Geraldton. Its flow is up to 72m thick with average combined interval grades of up to 9.8% K2O. Ardmore Phosphate Rock project in Mt Isa in North-West Queensland, and Goulburn Zinc project located in Lachlan Fold Belt in New South Wales. The Oxley Potassium Nitrate Project focuses on the development of a very rare 32km long outcropping ultrapotassic lava flow to produce high value fertilizer such as potassium nitrate and potassium sulphate. The lava flow is predominantly comprised of potassium feldspar. It has access to existing roads, rail, power, and gas infrastructure. The metallurgical test work for the project is under progress. As of June 2023, the project contains Inferred Mineral Resource of 154.7 million tonnes (Mt) at 8.3% potassium oxide (K2O) with cut-off grade of 6% K2O. The Ardmore Phosphate Rock Project in North-West Queensland is one of the few remaining undeveloped high-grade deposits in the world. Centrex owns 100% interest in the project. It is linked to the Port of Townsville through an existing rail line. The company is developing a phosphate rock export operation. As of June 2023, the total mineral resources for the project are 15.8 Mt at 27.8% P2O5 using a 16% P2O5 cut-off. Current mineral ore reserve for the project is 9.8 Mt at 30.2% P2O5. The company has 100% interest in the project.