A U of T study suggests why giant gold and copper deposits are found at some volcanoes but not others, a finding that could point prospectors to large deposits of this and other valuable metals.
“There’s one characteristic that is common to all of these big gold and copper deposits anywhere in the world,” says Professor James Mungall of the Department of Geology. The oceans crust that is pushed down under a volcano can start to melt, which it doesn’t normally do. His study, which appears in the October 2002 issue of Geology, examines the “Rim of Fire” volcanoes that surround the Pacific Ocean.
Mungall suggests that rich mineral deposits occur only when a slab of ocean floor slides underneath a continent or another part of the ocean floor and melts from the heat of the earth’s interior. The slab may get stuck long enough to melt or it may scrape along almost horizontally under the volcano, melting and causing the release of the metals to produce gold or copper deposits that are close enough to the surface for mining.
Nicolle Wahl | University of Toronto
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Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
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Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
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Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
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On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
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