Science: Prospecting Above Ground

One good way to find hidden minerals may be to study the plants and trees that grow in the neighborhood. In the current Mining and Metallurgy, Finnish Geochemist Kalervo Rankama tells why vegetation is a prospector's friend.

Many kinds of ore cannot be detected by geophysical instruments. Their reactions to electric currents and other physical tests are too much like the "country rock" around them. But all minerals are soluble in water to some extent. Ground water seeping through the rock may pick up so much of a metallic salt that the metal's presence...

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