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Haese, Ralf R; Hensen, Christian; de Lange, Gert Jan (2006): Concentrations of major and minor constituents of samples from the lower end of the cores from the eastern Mediterranean Sea (Table 2). PANGAEA, https://doi.org/10.1594/PANGAEA.725242, Supplement to: Haese, RR et al. (2006): Pore water geochemistry of eastern Mediterranean mud volcanoes: Implications for fluid transport and fluid origin. Marine Geology, 225(1-4), 191-208, https://doi.org/10.1016/j.margeo.2005.09.001

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Abstract:
The pore water chemistry of mud volcanoes from the Olimpi Mud Volcano Field and the Anaximander Mountains in the eastern Mediterranean Sea have been studied for three major purposes: (1) modes and velocities of fluid transport were derived to assess the role of (upward) advection, and bioirrigation for benthic fluxes. (2) Differences in the fluid chemistry at sites of Milano mud volcano (Olimpi area) were compiled in a map to illustrate the spatial heterogeneity reflecting differences in fluid origin and transport in discrete conduits in near proximity. (3) Formation water temperatures of seeping fluids were calculated from theoretical geothermometers to predict the depth of fluid origin and geochemical reactions in the deeper subsurface. No indications for downward advection as required for convection cells have been found. Instead, measured pore water profiles have been simulated successfully by accounting for upward advection and bioirrigation. Advective flow velocities are found to be generally moderate (3-50 cm/y) compared to other cold seep areas. Depth-integrated rates of bioirrigation are 1-2 orders of magnitude higher than advective flow velocities documenting the importance of bioirrigation for flux considerations in surface sediments. Calculated formation water temperatures from the Anaximander Mountains are in the range of 80 to 145 °C suggesting a fluid origin from a depth zone associated with the seismic decollement. It is proposed that at that depth clay mineral dehydration leads to the formation and advection of fluids reduced in salinity relative to sea water. This explains the ubiquitous pore water freshening observed in surface sediments of the Anaximander Mountain area. Multiple fluid sources and formation water temperatures of 55 to 80 °C were derived for expelled fluids of the Olimpi area.
Related to:
de Lange, Gert Jan; Brumsack, Hans-Jürgen (1998): Pore-water indications for the occurrence of gas hydrates in Eastern Mediterranean mud dome structures. In: Robertson, AHF; Emeis, K-C; Richter, C; Camerlenghi, A (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, 160: College Station, TX (Ocean Drilling Program), 160, 569-574, https://doi.org/10.2973/odp.proc.sr.160.042.1998
Project(s):
Coverage:
Median Latitude: 34.340038 * Median Longitude: 26.830064 * South-bound Latitude: 33.723900 * West-bound Longitude: 24.680600 * North-bound Latitude: 35.432500 * East-bound Longitude: 30.562150
Date/Time Start: 1995-04-19T19:20:00 * Date/Time End: 1995-04-24T12:48:00
Minimum DEPTH, sediment/rock: 0.14 m * Maximum DEPTH, sediment/rock: 970.00 m
Event(s):
160-970C * Latitude: 33.735600 * Longitude: 24.791100 * Date/Time Start: 1995-04-19T19:20:00 * Date/Time End: 1995-04-20T03:50:00 * Elevation: -2037.0 m * Penetration: 35.6 m * Recovery: 16.97 m * Location: Eastern Basin * Campaign: Leg160 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 35.6 m cored; 0 m drilled; 47.7 % recovery
160-970D * Latitude: 33.733900 * Longitude: 24.777000 * Date/Time Start: 1995-04-20T04:48:00 * Date/Time End: 1995-04-20T10:10:00 * Elevation: -1953.0 m * Penetration: 42.8 m * Recovery: 44.19 m * Location: Eastern Basin * Campaign: Leg160 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 42.8 m cored; 0 m drilled; 103.2 % recovery
160-971D * Latitude: 33.723900 * Longitude: 24.687800 * Date/Time Start: 1995-04-23T17:43:00 * Date/Time End: 1995-04-24T02:40:00 * Elevation: -1945.0 m * Penetration: 46 m * Recovery: 47.5 m * Location: Eastern Basin * Campaign: Leg160 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 46 m cored; 0 m drilled; 103.3 % recovery
Comment:
Formation water temperatures are calculated by three independent geothermometers according to Giggenbach (1988). / #999 = not applicable either because required concentrations were below detection limit or fluids were hypersaline / Ca and Mg: missing values=below detection limit
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Sample code/labelSample labelHaese, Ralf RODP sample designation
3DEPTH, sediment/rockDepthmGeocode
4SodiumNammol/lHaese, Ralf RICP-AES, Inductively coupled plasma - atomic emission spectroscopy
5ChlorideCl-mmol/lHaese, Ralf RIon chromatography
6CalciumCammol/lHaese, Ralf RICP-AES, Inductively coupled plasma - atomic emission spectroscopy
7MagnesiumMgmmol/lHaese, Ralf RICP-AES, Inductively coupled plasma - atomic emission spectroscopy
8PotassiumKmmol/lHaese, Ralf RICP-AES, Inductively coupled plasma - atomic emission spectroscopy
9Carbon, inorganic, dissolvedDICµmol/lHaese, Ralf RSpectrophotometry
10BoronBµmol/lHaese, Ralf RICP-AES, Inductively coupled plasma - atomic emission spectroscopy
11Temperature, waterTemp°CHaese, Ralf Rsee reference(s)K/Na
12Temperature, waterTemp°CHaese, Ralf Rsee reference(s)K/Mg
13Temperature, waterTemp°CHaese, Ralf Rsee reference(s)K/Ca
14CommentCommentHaese, Ralf R
Size:
122 data points

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