The acorn didn't fall far from the tree............
Posted on 03/18/2013 12:52:39 PM PDT by Red Badger
Solid gold can be deposited in Earth's crust "almost instantaneously" during earthquakes, said a study published in the journal Nature Geoscience on Sunday.
The gold is formed when a tremor splits open a fluid-filled cavity in the Earth's crust, causing a sudden drop in pressure, according to a team of Australian researchers. This, in turn, causes the fluid to expand rapidly and evaporate, and any gold particles that had been dissolved in it to "precipitate almost immediately", said a Nature press release. "Repeated earthquakes could therefore lead to the build up of economic-grade gold deposits." The researchers said much of the world's known gold was derived from quartz veins that were formed during geological periods of mountain building as long as three billion years ago.
The veins formed during earthquakes, but the magnitude of pressure fluctuations or how they drove gold mineralisation were not known. For this study, researchers used a numerical model to simulate the drop in pressure experienced in a fluid-filled fault cavity during an earthquake. In so doing, they answered a long-standing question about the world's gold resources—how the metal becomes so concentrated from a highly dissolved state to a solid, mineable one.
The study said single tremors would not generate economically viable gold deposits, which were built up one thin coating at a time. To form a 100 tonne gold vein deposit would take less than 100,000 years, the team wrote.
More information: Paper: dx.doi.org/10.1038/ngeo1759
Journal reference: Nature Geoscience
Could the minerals and rocks be old but the formation of the veins only a 100,000 years old?
Possibly. I’d assume that as more volcanic action takes place, more gold veins are created within the earth..........
Those that can, do.
Those that can’t, theorize.......
Love this show but this broad is one neurotic waste of a deckhand!
Her Dad is an idiot...........
The acorn didn't fall far from the tree............
Now that is a gold flake.
He sure is...I don’t know how either of them manage to stay in town....
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