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TURBIDITE PALEOSEISMOLOGY(and some other topics of interest)
MARNAUT CRUISE MEETING22-23 January, 2007
Outline: • Seismoturbidites as proxies of past earthquakes• Monitoring of turbidity by a sediment trap• Fluid vents and carbonate crusts• Other possible monitoring studies and sensors
Le Pichon et al. (2001)EPSL, 192: 595-616.
Turbidites as paleo-earthquake proxies in the deep Marmara basins
Package 2
Package 1
~40 m
~ 70-80 % turbidite-homogenite and ~ 20-30 % hemipelagic units
Sarı and Çağatay (2006)Geo-Marine Lett. 26: 69-76.
Core C-15 From south part of theÇınarcık Basin at 1251 m water depth
26 October 986İstanbul-ThraceEarthquake, intensity = 10
15 August 553İstanbul-KocaeliEarthquake, intensity = 9
957±43 AD
578±31 AD
Other dated sesimoturbidites
Tekirdağ Basin1859, 1912 Ganos, and 1965 Saros Gulf, (McHugh et al. (2006, EPSL)
Central Basin740 AD, 1340 AD and 1912? (McHugh et al. (2006, EPSL)
İzmit Gulf:181 and 740 AD (McHugh et al. (2006, EPSL)1509 (Çağatay et al. 2003. Mar. Geol. 202:159-173)
Study of seismoturbiditesITU-EMCOL’s core scanner anayses of water/ sediment core IZ-113 in İzmit Gulf
1999 İzmit earthquake event
mm
(95±65 14C y BP)
Sediment trapIndented Rotating Sphere (IRS) Sediment Tarp
Time series dataon the amount andcomposition of sedimenting hemi-pelagic material,and sampling of possibleseismoturbidites
Fluid ventsCold fuid venting, carbonate mound, bacterial mats and benthic fauna in SE Tekirdağ Basin
R/V Le Atalante cruise, Marmarascarps project, Armijo et al. (2003)
Carbonate crusts as archives of the cyclic changesin the chemical composition of the fluids
•Mineralogy •Isotopic composition
ITU-ISMAR-BO and INGV-Rome seafloor observatory projectin the western Izmit Gulf
Project proposal submitted to Istanbul City Council
Paolo Favali’s SN-4 (Submarine Network-4, Geostar) sea floor observatory system including the folling sensors:
• broad-band 3-component seismometer;• hydrophone• triaxial, single-point current meter;• CTD (conductivity, temperature and depth) sensor• CH4 sensors (at least 2 in parallel)• O2 sensor