Regional setting of Håkon Mosby Mud Volcano, SW Barents Sea margin

Abstract The Håkon Mosby Mud Volcano (HMMV) is a seafloor mud volcano, having a 1-km-diameter circular shape and a relief of 8–10 m. HMMV is located within a slide scar on the Bjørnøya glacial submarine fan on the SW Barents Sea slope, and is underlain by a >6-km-thick Cenozoic sequence. Multichannel seismic data reveal a 1- to 2-km-wide disturbed zone, which extends to a depth of >3 km below the HMMV. We relate the zone to the presence of free gas. The seismic data are compatible with an intrasedimentary sourced mud volcano related to the glacial sedimentation history and mass movements.

[1]  J. Laberg,et al.  Large‐scale sedimentation on the glacier‐influenced polar North Atlantic Margins: Long‐range side‐scan sonar evidence , 1996 .

[2]  O. Eldholm,et al.  The western Svalbard margin (74°–80°N) , 1988 .

[3]  T. Vorren,et al.  Late Miocene–Pleistocene sequence stratigraphy and mass-movements on the western Barents Sea margin , 1993 .

[4]  J. Faleide,et al.  Cenozoic sedimentation along the southwestern Barents Sea margin in relation to uplift and erosion of the shelf , 1996 .

[5]  Alexei V. Milkov,et al.  Haakon Mosby Mud Volcano provides unusual example of venting , 1997 .

[6]  J. Laberg,et al.  The Middle and Late Pleistocence evolution and the Bear Island Trough Mouth Fan , 1996 .

[7]  P. Vogt,et al.  Ground-Truthing 11- to 12-kHz side-scan sonar imagery in the Norwegian–Greenland Sea: Part II: Probable diapirs on the Bear Island fan slide valley margins and the Vøring Plateau , 1999 .

[8]  P. Vogt,et al.  SW Barents Sea continental margin heat flow and Håkon Mosby Mud Volcano , 1999 .

[9]  J. Faleide,et al.  Crustal structure of the sheared southwestern Barents Sea continental margin , 1990 .

[10]  S. Planke,et al.  Norwegian-Greenland Sea thermal field , 2000, Geological Society, London, Special Publications.

[11]  B. Hjelstuen,et al.  Late Cenozoic evolution of the western Barents Sea-Svalbard continental margin , 1996 .

[12]  P. Vogt,et al.  Glacigenic mudflows on the Bear Island Submarine Fan , 1993 .

[13]  J. Faleide,et al.  Deep seismic transects across the sheared western Barents Sea-Svalbard continental margin , 1991 .

[14]  J. Laberg,et al.  A Late Pleistocene submarine slide on the Bear Island Trough Mouth Fan , 1993 .

[15]  J. Laberg,et al.  Late Weichselian submarine debris flow deposits on the Bear Island Trough Mouth Fan , 1995 .

[16]  M. Talwani,et al.  Sediment distribution and structural framework of the Barents Sea , 1977 .

[17]  Y. Kristoffersen,et al.  Mass movements in glaciomarine sediments on the Barents Sea continental slope , 1996 .

[18]  P. Vogt,et al.  Heat flow highs on the Norwegian‐Barents‐Svalbard continental slope: Deep crustal fractures, dewatering, or “memory in the mud”? , 1996 .

[19]  C. Windisch,et al.  Barents Sea continental margin sonobuoy data , 1977 .

[20]  V. Renard,et al.  Structure of the barents sea from seismic refraction , 1974 .

[21]  J. Laberg,et al.  On the origin and flow behavior of submarine slides on deep-sea fans along the Norwegian–Barents Sea continental margin , 1997 .

[22]  J. Faleide,et al.  Late Mesozoic-Cenozoic evolution of the south-western Barents Sea in a regional rift-shear tectonic setting , 1993 .