Mining on Mars?

Although scientists don't plan on mining Mars anytime soon, they are currently studying the planet to find out where valuable natural resources may be. According to experts, the best places to search are probably volcanoes, lava flows and impact craters. However, the natural resources found there would probably be very different from those found on Earth. Minerals like gold and silver may not even exist there!

What kind of natural resources do you think we could find on Mars?