Energy Information Administration includes specific fuel groups (including petroleum, renewables and altermative fuels), forecasts, consumption, prices, international data, and more.
International Energy Data includes country specific information as well as overviews.
Minerals Information including:
Statistical Compendium. Compilation of data on mining and minerals in the United States. Combines data, formerly published in the Minerals Yearbook series, into a longitudinal record (usually 20 years) for 34 minerals.
Mineral Resources On-Line Spatial Data includes maps and data relevant to minerals, geology, geochemistry and geophysics.
Mining Statistics (choose Publications under the tab for Mining)
Forest Service's Minerals Management site
Search the internet site of an agency that collects statistics or funds research and publications of interest to you such as the National Energy Technology Laboratory (a laboratory in the Department of Energy which is devoted to fossil energy research). Example of a state site of interest: California Department of Conservation.