Saturday, June 16, 2012

Iceland glaciers are home gases in solar nebula

The layer of under Iceland glaciers of the deepest layer would house gases from the solar nebula, the cloud of dust and gas that gave rise to the planets of the Solar System, according to a study released today by the scientific journal "Nature". This cloud, composed mainly of hydrogen, helium and dust existed in the first tens of thousands of years of history of the solar system and led to several of its planets, before being spread by winds from the Sun Now, 4 000 600 million years later, scientists at Harvard University have found traces of helium that was part of the solar nebula, trapped in tiny bubbles in volcanic rocks from under the glaciers of Iceland.
So far scientists agreed on the existence of an underground reservoir rich in noble gases from the solar nebula, but were unable to locate it on the map. The finding team led by geochemist Sujoy Mukharjee, Harvard University, points to Iceland as one of the places on the planet most likely to hold this reservation. Iceland is a country of particular interest to geologists by the existence of volcanoes communicated with the deepest part of the mantle and the study of its basaltic help you better understand the formation Earth and the operation of its internal layers and inaccessible. Specifically, the study focused on the composition of the two parties which divide the Earth's mantle, the layer that lies between the crust and the core of the planet. Mukharjee As detailed in his article, the innermost part of the mantle contains noble gases from the solar nebula, which is never leaked to the outer, consisting mostly of components from the impact of meteorites on Earth. Neither the billions of years of formation of the mantle and the impact on Earth of celestial bodies the size of Mars that led to the Moon have been completely eliminate the remains of these gases, stresses Mukharjee. However, scientists do not know yet how these gases were trapped inside the forming planets or why were preserved over time.

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