The area is hosted by Samail Ophiolite, along with Hawasina nappes, which appear at the front of the Samail Nappe in Jabal al Hammah. The area surrounding the prospect is structurally complex, with the majority portion filled with wadi gravels, and comprises outcrops of different geological units. Most of the copper mineralisation at Washihi is identical to the volcanic-hosted massive sulphide style with the majority of copper occurrences as stockwork of sulphide mineral veins. Project Owner: Al Hadeetha Resources (AHR) joint venture (JV) between Alara Resources subsidiary Alara Oman Operations, Al Hadeetha Investments and Al Tasnim Infrastructure Services is developing the project. AHR became the first JV to secure a copper mining licence in Oman since 2004.
AHR suggested employing conventional open pit mining methods, involving drill and blast, followed by load and haul at Al Hadeetha. The production schedule proposed extraction of 8 million tonnes annually at an average waste-to-ore strip ratio of 5.2:1. Al Hadeetha is expected to produce 10.1 million tonnes through its mine life, with 915,000t in the first year, 1 million tonnes from the second year to the 10th year and 196,000t during the 11th year. The ore will be processed at the 1Mtpa processing plant and fed to the run-of-mine (ROM) bin directly by truck. It will be withdrawn by vibrating grizzly feeder and transferred to a single toggle jaw crusher. The crushed material will be ground in two mills, operating in a closed circuit with a discharge double-deck screen, a cone crusher as SABC combination (semi-autogenous grinding (SAG), ball mill and a cone crusher) and hydro cyclones. The subsequent cyclones overflow will gravitate to the flotation circuit.
Power will be sourced from the Khadra Bin Daffa grid, located approximately 5km from the project site. The water for the process plant will be collected from the Nizwa sewage treatment plant through a 70km buried pipeline. Potable water is proposed to be sourced from nearby bores. Diesel fuel is delivered to the site in bulk via fuel tankers and stored in the 50,000l bulk storage tank. Workers will be accommodated at the proposed on-site village.
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