CAGE19-1 Cruise Report: Passive and active ocean-bottom seismic surveys at Vestnesa Ridge, west-Svalbard margin within the framework of the SEAMSTRESS project

• Published in: CAGE – Centre for Arctic Gas Hydrate, Environment and Climate Report Series
• Main Author: Bünz, Stefan
• Format: Article in Journal/Newspaper
• Language: English
• Published: Septentrio Academic Publishing 2023
• Subjects: gas hydrates; chimney; fluid flow; Vestnesa; OBS; Arctic; Hanssen; Lunde; Norway; Svalbard; The Chimney; Tromsø; arctic methane; Svalbard margin
• Online Access: https://septentrio.uit.no/index.php/cage/article/view/6909; https://doi.org/10.7557/cage.6909

Cruise CAGE19-1 with UiT’s research vessel R/V Helmer Hanssen was the 1st of several planned cruises within the SEAMSTRESS project (Tectonic stress effects on Arctic methane seepage), an early-career starting grant by the Tromsø Research Foundation (TFS) and the Research Council of Norway (RCN-Frinatek) awarded to Andreia Plaza-Faverola. The overall goal of cruise CAGE19-1 was to conduct a large-scale ocean-bottom seismic experiments on the eastern segment of the Vestnesa Ridge. A dense network of 23 ocean-bottom seismometers (OBS) have been deployed over the Lunde pockmark. Seismic acquisition over these OBS will provide data for a tomographic inversion of travel times in order to obtain the velocity structure of the chimney beneath the Lunde pockmark. In a second experiment, 7 OBS have been deployed long-term until summer 2020 and monitor microseismic events related to tectonics and seepage from pockmarks along the eastern segment of Vestnesa Ridge The cruise may be known as: CAGE19_1