Since the catastrophic releases of CO(2) in the 1980s, Lakes Nyos and Monoun in Cameroon experienced CO(2) recharge at alarming rates of up to 80 mol/m(2) per yr. Total gas pressures reached 8.3 and 15.6 bar in Monoun (2003) and Nyos (2001), respectively, resulting in gas saturation levels up to 97%. These natural hazards are distinguished by the potential for mitigation to prevent future disas...

BASALTS: IMPLICATIONS FOR THE DEGASSING OF WATER FROM MARTIAN MAGMAS. C. D. K. Herd, A. H. Treiman, G. A. McKay and C. K. Shearer, Lunar and Planetary Institute, 3600 Bay Area Blvd., Houston, TX 77058, [email protected], Astromaterials Research Office, SR, NASA Johnson Space Center, Houston, TX 77058, Institute of Meteoritics, Department of Earth and Planetary Sciences, University of New Mexico...

Introduction: Geomorphological observations of Mars surface and mineral detection, in particular hydrated sulphates, militate for the idea that liquid water have existed on Mars surface, even if physical conditions forbid its presence today. Beside the sul-phate formation which requires particular chemical conditions, clay minerals are of particular interest because they are the first by-produc...

It is generally accepted that progressive cooling of global climate since the Late Cretaceous results from decreasing partial pressure of atmospheric CO2 (pCO2). However, details on how and why the carbon cycle evolved and how it would affect pCO2 have not been fully resolved. While the long-term decline of pCO2 might be caused by the decrease of volcanic degassing through the negative feedback...

Nitrogen, carbon, hydrogen and sulfur are essential elements for life comprise about 1% of terrestrial planet masses. These dominate planetary surfaces due to their volatile nature, but the Earth's interior also constitutes a major C-H-N-S reservoir. Resolving origin surficial versus deep reservoirs requires past 4.5 Giga-years mantle outgassing ingassing processes be reconstructed, involving m...

A new contactless ultrasonic sonotrode method was previously designed to provide cavitation conditions inside liquid metal. The oscillation of entrapped gas bubbles followed by their final collapse causes extreme pressure changes leading de-agglomeration and the dispersion oxide films. forced wetting particle surfaces degassing are other mechanisms that considered be involved. Previous publicat...