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Gold Found in Trees in Western Australia



While money does not grow on trees per se, we have discovered that gold does.

Scientists have revealed that gum trees from the Western Australian goldfields draw up tiny particles of gold via their roots and it ends up in their leaves and branches.

The study published in Nature Communications recently providing the 1st evidence of gold growing in trees.

“The eucalyptus tree acts as a hydraulic pump, its roots extend tens of meters into the ground and draw up water containing the gold. As the gold is likely to be toxic to the plant, it’s moved to the leaves and branches where it can be released or shed to the ground,” CSIRO geochemist, Dr Mel Lintern said.

The discovery is unlikely to start an old-time gold rush, as these ‘nuggets’ are just 1/5th the diameter of a human hair and invisible to the eye. Yet, it could provide a golden opportunity for mineral exploration, as the leaves or soil underneath the trees where they have fallen could indicate gold ore deposits buried up to tens of meters underground and under sediments that are up to 60-M years old.

“The leaves could be used in combination with other tools to get an idea of what is happening below the surface without the need to drill. It could enhance gold exploration in a way that’s more targeted and environmentally friendly,” says Dr Lintern.

The research team used the powerful x-Ray elemental imaging equipment at the Australian Synchrotron to locate and see the gold in the leaves.

By sampling and analyzing vegetation for traces of minerals, we may get an idea of what’s happening below the surface without the need to drill. It is a more targeted way of searching for minerals that reduces costs and impact on the environment.

“Eucalyptus trees are so common that this technique could be widely applied across Australia. It could also be used to find other metals such as zinc and copper,” says Dr Lintern.

Researchers using natural materials, such as calcrete and laterite in soils, for mineral exploration has led to many successful ore deposit discoveries in regional Australia. The outcomes of the research provide a direct boost to the national economy.

Stay tuned…

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