Earthquakes turn water into gold
2013-03-18 0:00

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

Gunman Storms Dutch TV Station Demanding Airtime
2015-01-30 23:32
Dutch authorities have released few details about the bizarre case of 19-year-old Tarik Zahzah’s attack on the main news studio of television station NOS on Thursday. To get the obvious question out of the way first, the police say there is no evidence that Zahzah, who is half-Egyptian, acted on behalf of organized terrorism. The authorities always say that on the ...
How Alan Dershowitz bullied rape victims to protect a serial child molester
2015-01-30 23:40
Harvard law professor Alan Dershowitz always felt children were fair game for Israeli missiles. Now the question is whether he thinks they are fair game for the sexual exploits of his powerful associates and himself. Dershowitz and the UK’s Prince Andrew were accused in a recent court filing of raping a teenage girl who was forced into sexual slavery by ...
Alchemical Banksters
2015-01-30 22:39
This past week, the world's preeminent vultures, the economic power elite, met in Davos to discuss the maintenance of their global fiat hegemony. Highlights included furthering austerity, noting that the serf class can't have air conditioning and cars, as well as cheering on the death of privacy through the rise of technocracy. The degenerate elite, completely out of touch with ...
Men must prove a woman said ’Yes’ under tough new rape rules
2015-01-30 4:54
New guidance will be issued to all police forces and prosecutors as part of a ’toolkit’ to move rape investigations into the 21st century Men accused of date rape will need to convince police that a woman consented to sex as part of a major change in the way sex offences are investigated. The Director of Public Prosecutions said it was ...
4 beheaded in Saudi Arabia less than a week into King Salman's rule
2015-01-30 3:13
Comment: So when will the the "Human rights" promoting liberal west elite decide invade Saudi Arabia like they did Libya? Members of Magic Movement stage a mock execution scene in protest of Saudi Arabia beheading of eight Bangladeshi workers in October 2011. Four people have been executed in Saudi Arabia less than a week after 79-year-old King Salman assumed power following the ...
More News »