Author/Authors :
Knak Jensen، نويسنده , , Svend J. and Skibsted، نويسنده , , Jّrgen and Jakobsen، نويسنده , , Hans J. and ten Kate، نويسنده , , Inge L. and Gunnlaugsson، نويسنده , , Haraldur P. and Merrison، نويسنده , , Jonathan P. and Finster، نويسنده , , Kai and Bak، نويسنده , , Ebbe and Iversen، نويسنده , , Jens J. and Kondrup، نويسنده , , Jens C. and Nّrnberg، نويسنده , , Per، نويسنده ,
Abstract :
Tumbling experiments that mimic the wind erosion of quartz grains in an atmosphere of 13C-enriched methane are reported. The eroded grains are analyzed by 13C and 29Si solid-state NMR techniques after several months of tumbling. The analysis shows that methane has reacted with the eroded surface to form covalent Si–CH3 bonds, which stay intact for temperatures up to at least 250 °C. The NMR findings offer an explanation for the fast disappearance of methane on Mars.
Keywords :
Mars , Atmospheres , aeolian processes , CHEMISTRY , Atmosphere
