From Livermore Lab: “Oxygen to the core”


Lawrence Livermore National Laboratory

01/10/2013
Anne M Stark

An international collaboration including researchers from Lawrence Livermore National Laboratory has discovered that the Earth’s core formed under more oxidizing condition’s than previously proposed.

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Through a series of laser-heated diamond anvil cell experiments at high pressure (350,000 to 700,000 atmospheres of pressure) and temperatures (5,120 to 7,460 degrees Fahrenheit), the team demonstrated that the depletion of siderophile (also known as “iron loving”) elements can be produced by core formation under more oxidizing conditions than earlier predictions.

‘We found that planet accretion (growth) under oxidizing conditions is similar to those of the most common meteorites, said LLNL geophysicist Rick Ryerson.

The research appears in the Jan. 10 edition of Science Express.

Other teams members include Julien Siebert and Daniele Antonangeli (former LLNL postdocs) from the Université Pierre et Marie Curie, and James Badro (a faculty scholar at LLNL) from the Institut de Physique du Globe de Paris.

See the full and enlightening article here.

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