The magnetic property in gas hydrate-bearing sediments and its association with iron geochemical behavior in the Sea of Marmara
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Figure 1. Downcore variation of magnetic parameters and geochemical data for two cores from the Sea of Marmara. Figure 2. Curves of magnetic susceptibility versus temperature of the samples from two cores. Figure 3. FORC diagrams and hysteresis ratios plotted on a Day plot for core MRS-CS-05 and core MRS-CS-16. Figure S2. Hysteresis loops of samples from two cores in the Sea of Marmara. Figure S3. Zero Field Cooled (ZFC) and Field Cooled (FC) curves of representative samples in two cores.
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Magnetic property measurements, geochemical data in combination with electron microprobe imaging were conducted on two cores from the Sea of Marmara. Authigenic greigite and pyrrhotite are confirmed in samples from the Western High, which was cored entirely with current seepages and gas hydrate distribution. It is most likely caused by the strong accumulation and upward fluids, including dissolved methane and high CO2 and heavy hydrocarbons. This study establishes a close relationship aomong magnetic properties, iron cycle, and gas hydrate.