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Patches Along Core-Mantle Boundary May Be Deep Hiding Place for Oxygen

Patches Along Core-Mantle Boundary May Be Deep Hiding Place for Oxygen

Almost 3,000 kilometers below the surface, mysterious patches sit in between the rocky mantle and Earth’s iron-rich core. Scientists know of these blotches because they significantly slow passing seismic waves generated by earthquakes. Since the discovery of these so-called “ultralow-velocity zones” (ULVZs) in the mid-1990s, researchers have proposed several possible explanations, but no one has been able to fully account for these subsurface anomalies.

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Orthorhombic Ferromagnesite as a Deep-Mantle Carbon Carrier 16 February 2015 Feature

How carbon is stored in Earth’s deep interior remains one of the key open questions in Earth…

Water Surprises Again: Light Refraction and Absorption Under Pressure 27 May 2014 Feature

Water is a key constituent of Earth’s crust and mantle. Its electronic properties at high…

Spin Transition in Deep-Mantle Ferromagnesite 15 January 2014 Feature

Carbonates, such as magnesite, calcite, and dolomite, are important potential deep-carbon carriers…

Scientists Discover Quick Recipe for Producing Hydrogen 6 December 2013 Feature

Water + rock + aluminum oxide + extreme pressure, heat = quick, copious H2; could one day power…

Aluminum Catalyzes Serpentinization that Fuels Deep Life 5 December 2013 Feature

Geologic hydrogen production has long been thought to fuel deep ecosystems. Hydrogen-producing…

Partial serpentinization of olivine
DCO News Release December 2013 30 November 2013 Feature

Water + rock + aluminum oxide + extreme pressure, heat = quick, copious H2; could one day power…

Work Begins on Next Generation Sample Preparation Instrument 12 November 2013 Feature

Designing and developing novel instrumentation is a foundational part of the Deep Carbon…

Methane Reactivity in Deep Earth, Neptune, and Uranus 16 September 2013 Feature

Under the high temperature and pressure conditions of Earth’s mantle, molecules don’t behave as…

Ferromagnesite as a Deep Mantle Carbon Host 13 February 2013 Feature

Carbonates (e.g., MgCO3, CaCO3) have been proposed as potential host materials for carbon in Earth’…

Dolomite's Role in the Deep Mantle 13 February 2013 Feature

Understanding the deep mantle’s role in the global carbon cycle requires measurements of the high…

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