mantle

Flawed, Precious Stones Carry Clues From Deep in the Mantle

Earth’s oxygen-rich atmosphere creates extremely oxidizing conditions at the surface. Anyone who has seen rusty metal has observed oxidation in action: the oxygen steals electrons from the metal, creating crusty, red, iron oxide. Within Earth’s core, however, low levels of oxygen create much more reduced conditions. Intuitively, many researchers have supposed that Earth’s layers become less oxidized with depth, but few samples have emerged from the deep Earth to support or disprove this idea.

Showing 31-40 of 111 results
Extreme Heat and Pressure May Yield Hydrocarbons in Earth’s Mantle 20 March 2017 Feature

In a new review in ChemistrySelects, three Deep Carbon Observatory researchers synthesize theory,…

History of Earth's Early Carbon Cycle Recorded in 2-Billion-Year-Old Diamonds 28 February 2017 Feature

Members of DCO’s Reservoirs and Fluxes Community Gareth Davies, Suzette Timmerman and Janne…

New mineral named in honor of DCO co-Executive Director Hemley 17 February 2017 Feature

Hemley’s colleagues, Luca Bindi, Ming Chen, and Xiande Xie, reported the discovery of the first…

Explaining Abnormal Sound Velocities of Carbonates in Earth’s Mantle with Extreme Physics and Chemistry 19 January 2017 Feature

Earth’s interior is a dynamic mixture of minerals and crystals. Under the influence of extreme…

Deep Mantle Chemistry Surprise: Carbon Content not Uniform 13 January 2017 Feature

Research by Deep Carbon Observatory scientists Marion Le Voyer, Erik Hauri (Carnegie Institution…

Deep Carbon Degassing Measurements Help Explain Unrest at Campi Flegrei 13 January 2017 Feature

Increases in seismic activity and ground deformation often indicate impending volcanic eruptions.…

Deep Earth Water Community Forms to Investigate Fluids in Deep Earth 19 December 2016 Feature

DEW, published in 2014, enables modeling of water-rock interactions at the conditions of Earth’s…

Earth’s Largest Diamonds Form in Metal-bearing Part of Earth’s Mantle 15 December 2016 Feature

Super-deep diamonds, which form more than 380 km deep in Earth’s mantle, are invaluable tools for…

X Ray Diffraction of Super-deep Diamonds 15 December 2016 Feature

In this video, Fabrizio Nestola demonstrates the instrument used in new research about how large…

Connecting the Surface and the Deep: Geochemical Cycles and Fluid-Rock Interactions Inside Earth 18 November 2016 Feature

Deep underground, fluids circulating in Earth’s crust and mantle transport carbon, sulfur and other…

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