Magma in mantle has deep impact

Rice University study suggests rocks melt at a greater depth than once thought

The researchers also found carbonated rock melts at significantly lower temperatures than non-carbonated rock. “This deep melting makes the silicate differentiation of the planet much more efficient than previously thought,” Dasgupta said. “Not only that, this deep magma is the main agent to bring all the key ingredients for life – water and carbon – to the surface of the Earth.”


http://news.rice.edu/2013/01/09/magma-in-mantle-has-deep-impact-2/