Bayanmunkh MyagmarsurenMunkhjargal ChimeddorjEnkhjin Seded2025-10-012018https://gmitlibrary.net/handle/123456789/13The research continued from 27th of March till 10th of August. Samples were taken from dump of Erdenetiin Ovoo porphyry copper molybdenum deposit located in Orkon aimag of Mongolia that belongs to Achit-Ikht LLC. Achit-Ikht LLC has an operation of low grade ore dumps nowadays, but there is opportunity to increase leaching efficiency by heap leaching.enThesis