16 research outputs found
Endophytic bacterial diversity in the phyllosphere of Amazon Paullinia cupana associated with asymptomatic and symptomatic anthracnose
A cross-reactive mouse anti-i-ek monoclonal antibody detects an hla-dr polymorphism linked to hla-dr1.
Studying the effect of two biological fertilizers on salt tolerance of tall fescue ( Festuca arundinaceae
Preparation and application of silica-based perfusion packing of size exclusion chromatography for quantitation of polyacrylamide in enhanced oil recovery systems
Musique sur le thème de la chasse: continuité et évolution dans l'histoire européenne
Ultralow viscosity of carbonate melts at high pressures
Knowledge of the occurrence and mobility of carbonate-rich melts in the Earth's mantle is important for understanding the deep carbon cycle and related geochemical and geophysical processes. However, our understanding of the mobility of carbonate-rich melts remains poor. Here we report viscosities of carbonate melts up to 6.2 GPa using a newly developed technique of ultrafast synchrotron X-ray imaging. These carbonate melts display ultralow viscosities, much lower than previously thought, in the range of 0.006-0.010 Pa s, which are ~2 to 3 orders of magnitude lower than those of basaltic melts in the upper mantle. As a result, the mobility of carbonate melts (defined as the ratio of melt-solid density contrast to melt viscosity) is ~2 to 3 orders of magnitude higher than that of basaltic melts. Such high mobility has significant influence on several magmatic processes, such as fast melt migration and effective melt extraction beneath mid-ocean ridges