Earthquakes turn water into gold
2013 03 18

From: CBC



Research reveals high-pressure origin of precious metal

Gold could be deposited almost instantaneously in the Earth’s crust during earthquakes, say Australian researchers.

The researchers have found gold is formed when an earthquake widens a fluid-filled rock fracture, causing a drop in pressure, which in turn allows gold dissolved in the fluid to rapidly leach out.

Their study, reported in the journal Nature Geoscience, explains how the metal changes from a soluble state to concentrated deposits.

"[This process] may underpin the formation of up to 80 per cent of the world’s gold deposits," they write.

Much of the world’s gold is found in quartz veins that formed during periods of mountain building up to three billion years ago and was deposited by large volumes of water along deep, seismically active faults.

The veins were formed under fluctuating pressures during earthquakes, but until now, the magnitude of these pressure shifts and how they influence the formation of gold was unknown.

Dr. Dion Weatherley of the University of Queensland and Professor Richard Henley from the Australian National University, developed a mathematical model to see how different earthquake magnitudes affect fluid-filled rock fractures.

They found that a sudden drop in pressure in the fracture causes the fluid inside to expand and vaporise — a process known as flash vaporization.

"The change in the volume of the fracture causes a change in fluid pressure," explains Weatherley.

"The fluid becomes supersaturated at the low pressures and the various minerals that are dissolved will precipitate out very rapidly."

Gold deposits build up

Different minerals are known to precipitate out of fluids at specific pressures.

Weatherley and Henley found the ability of minerals to dissolve out of the water grew quickly even for relatively small earthquakes.

While a single event may not deposit significant levels of gold, successive earthquakes in the same area can cause a build up of these deposits within the fracture eventually leading to economically viable gold concentrations, say the researchers.

The bulk of gold mined today has been found where deposits are exposed on or near the surface.

According to Weatherley, geologists believe they’ve explored the majority of the dry part of the planet, and now have to start looking for deposits which are hidden in deeper parts of the crust.

That requires more knowledge on the geological processes that have been occurring in that part of the world.

"When we know what forms a deposit, we can go looking for ancillary tell-tale signs of where those kind of mechanisms may have been occurring both in the recent past and through geological time," says Weatherley.

"This may assist in future gold exploration efforts."

Article from: cbc.ca



Related Articles
Is the New Madrid Mega Quake Being Engineered?
Did US secret weapons cause Japan’s earthquake and tsunami?
7.7 Earthquake Hits Where The Geoengineering Experiment Took Place
Mysterious El Dorado - A Place, or a Person?
Germany Repatriating Gold from the New York Federal Reserve
An Afghan Mystery: Why Are Large Shipments of Gold Leaving the Country?
Using insects to search for gold


Latest News from our Front Page

Left and their big fat multi-cultural lie
2014 08 30
Picture the scene; a taxi is pulled over by an officer from South Yorkshire Police who finds a half-naked 12-year-old in the back of the cab so drunk or drugged that she can hardly stand. When interviewed, the taxi driver is found to have pornographic pictures of the girl on his phone. The officer hands back the phone and – no ...
Left and their big fat multi-cultural lie
2014 08 30
Picture the scene; a taxi is pulled over by an officer from South Yorkshire Police who finds a half-naked 12-year-old in the back of the cab so drunk or drugged that she can hardly stand. When interviewed, the taxi driver is found to have pornographic pictures of the girl on his phone. The officer hands back the phone and – no ...
Rotherham - Child sacrifice to diversity god
2014 08 30
It is sad to see how the once great nation of England has fallen. Britain now rivals North Korea for totalitarian control. If you are White, the wrong word can send you to jail. If you are non-White you are free to rape and kill the native British with impunity. If Henry the VIII came back from the grave, he could ...
Hungary’s Orban Bashes Liberal Immigration Policy
2014 08 29
Hungary’s Prime Minister Viktor Orban on Monday lashed out against immigration, setting one of the main policy objectives of his next term in power after winning parliamentary elections in April. “The goal is to cease immigration whatsoever,” said Hungary’s prime minister. “I think the current liberal immigration policy, which is considered obvious and morally based, is hypocrite,” Mr. Orban said. At a ...
China’s “Duplitecture” Cities Mimic the World’s Greatest Architectural Hits
2014 08 29
The best knockoffs in the world are in China. There are plenty of fake designer handbags and Rolexes, but China’s knockoffs go way beyond fashion. There are knockoff Apple stores that look so much like the real thing that some employees believe they are working in real Apple stores. And then there are entire knockoff cities. There are Venices with ...
More News »