Concept

Heavy mineral sands ore deposits

Publications associées (12)

Integrating CO2 mineralization in industrial clusters: the benefits of material and heat integration

François Maréchal, Rafael Amorim Leandro De Castro Amoedo, Julia Granacher, Mouhannad Abou Daher

Curbing and capturing CO2 emissions is no longer enough to cope with the demanding environmental challenges of the coming years. Long-term storage technologies need deployment, to help industrial sectors to reach ambitious emission standards. Mineral carbo ...

2023

Os isotope heterogeneity of the upper mantle: Evidence from the Mayari-Baracoa ophiolite belt in eastern Cuba

Anders Meibom, Reto Frei

In an attempt to quantify the extent of geochemical heterogeneity within a restricted and well dated portion of the upper mantle, 27 chromite separates from the 90 My old chromite deposits in the Mayari-Baracoa ophiolite belt in eastern Cuba have been inve ...

2006

Pathological mineralization of cardiac valves: Causes and mechanism

Philippe Buffat, Elena Suvorova Buffat

Objective. Mechanism of calcification of cardiac valves was investigated through a comparative characterization of structure, morphology, and size of hydroxyapatite (HAP) crystals formed in mineral deposit on cardiac valves, bone tissue, and crystals synth ...

2005

Distribution of platinum-group elements and Os isotopes in chromite ores from Mayari-Baracoa Ophiolitic Belt (eastern Cuba)

Anders Meibom, Reto Frei

The Mayari-Baracoa ophiolitic belt in eastern Cuba hosts abundant chromite deposits of historical economic importance. Among these deposits, the chemistry of chromite ore is very variable, ranging from high Al (Cr#=0.43-0.55) to high Cr (Cr#=0.60-0.83) com ...

2005

Osmium isotopic compositions of Os-rich platinum group element alloys from the Klamath and Siskiyou Mountains

Anders Meibom, Reto Frei

[1] We present new measurements of Os-186/Os-188 and Os-187/Os-188 in 10 Os-rich platinum group element (PGE) alloys from placer deposits formed by the mechanical erosion of peridotite-bearing ophiolites in the Klamath and Siskiyou Mountains in northern Ca ...

2004

Model of the mechanism of Ca loss by bones under microgravity and earth conditions

Philippe Buffat, Elena Suvorova Buffat

A comparative characterization of crystal structure, morphology, sizes, and orientation in Ca phosphate precipitation from aqueous solutions, the mineral phase in bones, and mineral deposits on cardiac valves has been performed by high-resolution transmiss ...

2002

Electron beam induced deposition of rhodium nanostructures

Fabio Cicoira

Electron Beam Induced Deposition (EBID) allows deposition of three-dimensional micro- and nano-structures of conductive and insulating materials on a wide range of substrates. The process is based on the decomposition of molecules of a pre-selected precurs ...

EPFL2002

Evidence for an ancient osmium isotopic reservoir in Earth

Anders Meibom, Reto Frei

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

Model of the mechanism of Ca loss by bones under microgravity and earth conditions

Philippe Buffat, Elena Suvorova Buffat

2001

Chemical reactions in the deep earth

Philippe Gillet

We describe an overview of the experimental chemistry and mineralogy of the Earth. The extreme pressure (1 to 365 GPa) and temperature (1000 to 6000 K) conditions prevailing in the deep Earth can be reproduced in the laboratory with shock techniques, multi ...

1997

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