Concept

Earth's outer core

Related publications (57)

Evidence for an ancient osmium isotopic reservoir in Earth

Iridosmine grains from placer deposits associated with peridotite-bearing ophiolites in the Klamath mountains have extremely radiogenic Os-186/Os-188 ratios and old Re-Os minimum ages, from 256 to 2644 million years. This indicates the existence of an anci ...

2002

Physical properties of liquid Fe alloys at high pressure and their bearings on the nature of metallic planetary cores

Philippe Gillet

[1] Sulfur and silicon are among the expected alloying light elements in planetary liquid iron cores. Structural properties of Fe-27 wt % S and Fe-17 wt % Si liquid alloys at high pressure and high temperature (0-5 GPa/1400-2300 K) are measured by synchrot ...

2002

Printed circuit board integrated fluxgate sensor

Martinus Gijs

We have developed a cheap and simple trilayer printed circuit board (PCB)-based technology, adapted for the fabrication of fluxgate magnetic sensors. The two outer layers of the PCB stack comprise the electrical windings of the fluxgate, while the inner la ...

2000

Raman spectroscopy of iron to 152 gigapascals: Implications for Earth's inner core

Philippe Gillet

Raman spectra of hexagonal close-packed iron (epsilon-Fe) have been measured from 15 to 152 gigapascals by using diamond-anvil cells with ultrapure synthetic diamond anvils. The results give a Gruneisen parameter gamma(o) = 1.68 (+/-0.20) and q = 0.7 (+/-0 ...

2000

Osmium and lead isotopes of rare OsIrRu minerals: derivation from the core-mantle boundary region?

Anders Meibom, Reto Frei

We report exceptionally high Os-186/Os-188 for rare crystals of OsIrRu found in unconsolidated sediment near Port Orford, SW Oregon (USA), that are held to be derived from peridotite: in the nearby Klamath Mountains. These OsIrRu samples differ in composit ...

1999

Extraction of the optic disk boundary in digital fundus images

Jean-Philippe Thiran, François Mendels

The methods of active contours (snakes) and level sets were applied to images of the retina in order to locate the outer boundary of the optic disk. A gradient-vector-flow based active contour was used as it performed well over a large range of initial con ...

IEEE1999

Optimal Channel Networks - a Framework for the Study of River Basin Morphology

Andrea Rinaldo

Optimal channel networks (OCNs) are dendritic structures obtained by minimizing the local and global rates of energy dissipation in a continuously fed (in space and time) plane aggregation system reminiscent, and based on the properties, of the planform of ...

1993

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