Discussion On Economic Evaluation Of Deposits

The research object of economic evaluation on deposit is an undeveloped deposit, the purpose of assessment is examining its economic benefit. Economic evaluation is after geological evaluation and feasibility study usually, before the next production or exploration. Nowadays, thoughts of evaluation model mostly based on two main theories:the discounted cash flow and the method of adjustment on market transaction price. The paper take Chengmenshan deposits as example, discuss the significance of some important index and how to measure it in the economic evaluation of deposit.Chengmenshan copper mine is one of the largest polymetallic deposits in China, which contains copper, sulfur, zinc, molybdenum, and iron. There are more than 200 ore body in mining area, and very abundant in reserves. The deposit has a characteristic of several stages and various causes, it also has a complex hydrology and engineering geological environment.First of all, the paper has done a detailed study on the history of industry development on nonferrous metal. Mineral sales price is the biggest factor which affects mining company'profits, market demand will expand the production scale of enterprises, and push the price up again, so the price and its variation tendency in future is one of the important topics in this article. The third chapter introduced the stratigraphic distribution, tectonic activity, magma movement and regional mineral discovery. And then the author made an objective assessment of geological conditions and geological environment of the deposit, it can prove Chengmenshan mine has a rich reserves and a huge potential, and the potential also should be considered in the evaluation. Later, the paper discussed the complex hydrological and geological environment of the deposit which may become difficulties when exploit it, and point out the principle of measurement on cost. Because of the large-scale, and the increasing price of copper in long-term is inevitable, the author made some improvements of the expression on Economic Evaluation model. The purpose of economic evaluation provide the scientific evidence for enterprises to make decisions, so on the final of the paper is pertinent observations which depend on Jiang Tong Group's financial and technical performance. The conclusion is expanse basal installation; go prospecting in perimeter and deep, the establishment of the Ministry of Economic Research to guide production planning decisions, and so on.Through the research process, the author understand the theory of economic evaluation on deposits completely, and improved the model on evaluate a large-scale deposit with complex characteristics which is during exploration phase.