Comparison of coal resource methodology of the Republic of Armenia (former USSR) and the U.S. Geological Survey

Comparison of the Armenia and US systems of coal resource and reserve calculation indicates that the methodologies used are remarkably similar. The terminology is different, thus leading to confusion, but the methods used to calculate tonnages are virtually the same. The resource/reserve system used in the US is based upon that developed at the US Geological Survey (USGS) and the former US Bureau of Mines. Standards within Armenia were developed by the Ministry of Geology of the former USSR. Both systems classify coal resources/reserves in accordance to the degree of geologic control and economic feasibility of recovery.