NDLI: Active mud volcanoes on the upper slope of the western Nile deep-sea fan—first results from the P362/2 cruise of R/V Poseidon

Content Provider	Springer Nature Link
Author	Feseker, Tomas Brown, Kevin R. Blanchet, Cecile Scholz, Florian Nuzzo, Marianne Reitz, Anja Schmidt, Mark Hensen, Christian
Copyright Year	2010
Abstract	In February 2008, cruise P362/2 was undertaken aboard R/V Poseidon to the Giza and North Alex mud volcanoes (MVs) on the upper slope of the western Nile deep-sea fan. Emitted fluids were strongly depleted in chloride and rich in hydrocarbons, predominantly of thermogenic origin. In-situ sediment temperature measurements indicate extremely high and moderate levels of activity for the North Alex MV and Giza MV, respectively, and suggest rapid changes from dormant to active stages. Both the physical properties of core sediments (e.g., color and magnetic susceptibility), and their assemblages of micro- and nannofossils point to different sources for the two mud volcanoes. Biostratigraphic dating suggests source depths of 2,100–2,450 mbsf for the Giza MV and 1,150–1,550 mbsf for the North Alex MV. Very high temperatures of up to 70°C in shallow sediments at the North Alex MV can be explained only if the fluid source were warmer and deeper than the sediment source.
Starting Page	169
Ending Page	186
Page Count	18
File Format	PDF
ISSN	02760460
Journal	Geo-Marine Letters
Volume Number	30
Issue Number	3-4
e-ISSN	14321157
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-02-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geology
Content Type	Text
Resource Type	Article
Subject	Environmental Science Geotechnical Engineering and Engineering Geology Oceanography

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