Gold in Trees may Hint at Buried Treasure
by Sid Perkins
Money may not grow on trees, but gold does—or at least it accumulates inside of them. Scientists have found that trees growing over deeply buried deposits of gold ore sport leaves with higher-than-normal concentrations of the glittering element. The finding provides an inexpensive, excavation-free way to narrow the search for ore deposits.
Scientists have long had clues that trees and other vegetation pulled gold from the soil and transported it to their leaves, but the evidence wasn’t clear. The gold particles could have stuck to the leaves after being blown there as dust, for example. To bolster the case that the gold came from soil beneath the trees, researchers conducted a series of field studies and lab tests…
(read more: Science News/AAAS)
images: Mel Lintern/inset: Lintern et al., Nature Communications (2013)