Gas emissions at Svalbard Continental Margin
In the course of the 450th expedition with research vessel HEINCKE (HE450) we shall investigate gas emission of Vestnesa Ridge in 1,700-1,800m water depth. During past acoustic measurements at this submarine ridge always gas emissions in several pockmark structures have been observed in the water column. By means of the new MARUM ROV SQUID 2000 those gas emission sites and their environment of gas seeps shall be examined in detail. Besides a detailed mapping with photo mosaicking, we shall deploy pressure tight gas samplers in order to sample the free gas of the gas bubbles and to analyse them by means of a GC. Gas hydrate samples from the pockmarks will be taken, and measurements of methane in the dissolved gas phase of the water column above the emission sites will be done.