A collection of operational and technical reports relating to an experimental project of in-situ acid leaching of remnant copper sulphide ore at the historic Mutooroo mines, which are situated south of Cockburn in the Olary - Broken Hill district. The commercial objective was to extract most of the remaining copper metal from the shallower underground lodes in the northern area of the mine workings, besides also treating and then reclaiming the existing above-ground mine spoil heaps. It was envisaged that copper metal could be economically recovered from the mine drainage water after it was pumped to the surface, either by a basic cementation process if the dissolved grade was high enough, or by firstly circuit leaching the orebody to progressively dissolve the copper through natural sulphide oxidation, augmented by the addition of sulphuric acid where needed. From studies of the past mining records, it was found that the reported groundwater influx rate into the old workings had been of the the order of 180 cubic m per day (40,000 gpd) at 150 m depth. Assaying of the now still-standing drainage water that is present in the abandoned workings showed a dissolved copper concentration of 800 ppm Cu (in 27,000 ppm total dissolved salts) and a pH of 2.6. Includes reports on: - Characterization of oxide ore, Mutooroo copper mine, SA. Tailings samples in region of Greens No. 2 shaft were studied. - Copper solution mining at Mutooroo, SA. Quarterly pro - Dissolution of copper from "oxide ore", Mutooroo, SA. - Dissolution of copper from supergene sulphide ore, Mutooroo copper mine, SA. - Leaching behaviour of lump oxide ore from the Mutooroo copper mine, SA. Part 1: leaching in the absence of ferric iron (Fe3+). - Mineralogical characterization and leaching tests on selected diamond drill core samples from the Mutooroo copper mine, SA. Examines chemistry of the country rock ore mineral, process liquor system to assist with the explanation of field results of solution mining. Examines cause and effect of 0.75+ iron and 3+ sulphate precipitated for each tonne of copper recovered and dissolution of copper enriched silicate minerals formed by acid degradation of original rock forming minerals. - Mineralogical characterization of massive sulphide ore, Mutooroo copper mine, SA. Primary sulphide ore from DDH MM5 drilled by Mines Exploration, remote from the Mutooroo workings shows little evidence of alteration - Mineralogical characterization of supergene sulphide ore, Mutooroo copper mine, SA. - The mechanics of cementation. Pilot plant operations at Mutooroo, SA, by Adelaide and Wallaroo Fertilizers Ltd. An operating company metallurgical engineer's evaluation of the suitability of the variety of equipment, consumables and operating conditions used on AWF's cementation circuit at Mutoroo, which was part of the pilot scale copper ore in-situ leaching project. Further evaluation of the Kennecott - type cone is recommended as an alternative to conventional launders.