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Magma in Earth’s Mantle Forms Deeper Than Once Thought

By Guest PostJanuary 10, 2013Environmentananya mallik, anthony withers, brown university, carbon dioxide, carbonated rock, convection, crust, deeper magma, density, earth, earthquake, express lane, geologist, greg hirth, high pressure, jennifer wade, kyusei tsuno, magma, mantle, marc hirschmann, national science foundation, non carbonated rock, ocean floor, peridotite, rajdeep dasgupta, rice university, rock, seafloor, seismic wave, silicate rich mantle, temperature, university of minnesota, volcanic eruption, within the earth

Study simulating pressures in mantle beneath the ocean floor shows that rocks can melt at depths up to 250 kilometers

Magma forms far deeper than geologists previously thought, according to new research results.

A team led by geologist Rajdeep Dasgupta of Rice University put very small samples of peridotite, rock derived from Earth’s mantle, under high pressures in a laboratory.

The scientists found that the rock can and does liquify, at least in small amounts, at pressures equivalent to those found as deep as 250 kilometers down in the mantle beneath the ocean floor. (more…)

Diamond in The Rough: Half-Century Puzzle Solved

By Guest PostJuly 25, 2012Sciencecold compressed, conduct, Diamond, electricity, experiment, graphite, hard material, high pressure, industrial application, joseph panzik, m carbon, oakland university, optical technique, puzzle, raman spectroscopy, structure, symmetry, synthesize, university, xray diffraction, yale, yuejian wang

A Yale-led team of mineral physicists has for the first time confirmed through high-pressure experiments the structure of cold-compressed graphite, a form of carbon that is comparable in hardness to its cousin, diamond, but only requires pressure to synthesize. The researchers believe their findings could open the way for a super hard material that can withstand great force and can be used — as diamond-based materials are now — for many electronic and industrial applications. The study appears in Scientific Reports, a Nature journal.

Under normal conditions, pure carbon exhibits vastly different physical properties depending on its structure. For example, graphite is soft, but diamond is one of the hardest materials known. Graphite conducts electricity, but diamond is an insulator. (more…)

The Time Machine

By ShamsJanuary 10, 20101 commentScience Fictionapple, café, era, father of time machine, h g wells, high pressure, known uncertainty, renaissance, sir isaac newton, theory of gravitation, time machine, Wikipedia

Ok, let us first define: what’s a time machine!!

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Tag Archives: high pressure

Magma in Earth’s Mantle Forms Deeper Than Once Thought

Diamond in The Rough: Half-Century Puzzle Solved

The Time Machine