Fluids and processes at the seismically active fault zone in the Sea of Marmara

Ruffine, Livio; Çağatay, M. Namık; Géli, Louis

doi:10.1016/j.dsr2.2018.09.011

Cited by 4 publications

(4 citation statements)

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“…In this paper, we report the analytical results of bulk carbonates in two sediment cores collected from two important morphotectonic provinces in the SoM: the Western High and the Çınarcık Basin. The Western High is a compressional area characterized by seepage of thermogenic methane and heavy hydrocarbons, presence of gas hydrate, and relatively low sedimentation rates (30–40 cm/Kyr), whereas the Çınarcık Basin is one of the three deep (~1,250 m) transtentional subbasins, represented by emission of mainly biogenic methane and high (>1 m/Kyr) sedimentation rates (e.g., Armijo et al, ; Çağatay & Ucarkus, ; Ruffine et al, ; Zitter et al, ). To investigate the origin of the bulk carbonates in the two sediment cores from the Western High and the Çınarcık Basin, we analyzed the bulk carbonates for their stable carbon and oxygen isotopic and mineral compositions, together with the elemental concentrations and strontium isotopes in the selectively dissolved solutions of carbonates in chosen sediment samples.…”

Section: Introductionsupporting

confidence: 74%

“…Warm and local evaporative conditions in the SoM “lake” during the pre‐Bølling‐Allerød period (Vidal et al, ) may have contributed to the gas hydrate dissociation. The shallow occurrence of gas hydrate in the SoM (Ruffine et al, ) makes the gas hydrates even more vulnerable to the temperature and sea level perturbations. Ménot and Bard () found the hopanoid maxima over the last 15 ka and linked it to methanotrophic activity, providing the first geochemical evidence for a large release of methane during the last deglaciation in SoM (Ménot & Bard, ).…”

Section: Discussionmentioning

confidence: 96%

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Interpretation of Late‐Pleistocene/Holocene Transition in the Sea of Marmara From Geochemistry of Bulk Carbonates

Liu

Yin

et al. 2019

Geochem Geophys Geosyst

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Isotopic, mineralogical, and elemental analyses have been conducted for the geochemical characteristics of the bulk carbonates in the sediment cores from the Western High and Çınarcık Basin in the Sea of Marmara to investigate the authigenic, biogenic, and detrital components and their possible use in paleoceanographic studies. The Western High is a relatively shallow (−500 to −800 m) compressional area characterized by relatively low sedimentation rates (30–40 cm/Kyr), whereas the Çnarcık Basin is a deep (~1,250 m) transtentional area represented by high sedimentation rates (>1 m/Kyr). Both 87Sr/86Sr and δ18O of bulk carbonates from the Western High exhibit significant variations, increasing steeply from 87Sr/86Sr of 0.708437 to 0.708916 and δ18O of −3.2‰ Vienna Pee Dee Belemnite (VPDB) to 0.1‰ VPDB, indicating the incursion of the Mediterranean seawater after the last glacial and reflected in the change from lacustrine to marine environment. However, bulk carbonates in the core from the Çınarcık Basin have comparatively uniform values of 87Sr/86Sr (~0.708845) and δ18O (~0.0‰ VPDB), implying that this core did not experience the lacustrine/marine transition. In the Western High, δ13C values up to +24.3‰ VPDB at 400 cm below seafloor reveal the mineralization of heavy CO2, providing independent evidence for the subsurface biodegradation of petroleum. While in the Çınarcık Basin, δ13C values of bulk carbonates were relatively constant (approximately −2.94‰ VPDB). The high δ13C values of bulk carbonates from the Western High reflect the dissolution of primary carbonates as a result of the local acidic environment and precipitation of authigenic carbonates later, supported by mineralogical and elemental results.

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Section: Introductionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 96%

Interpretation of Late‐Pleistocene/Holocene Transition in the Sea of Marmara From Geochemistry of Bulk Carbonates

Liu

Yin

et al. 2019

Geochem Geophys Geosyst

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“…The Sea of Marmara has also been shown to be a unique, natural laboratory to improve our understanding of the rela-tionships between fault activity, seismicity, fluid migration and ecosystems at a major, transform plate boundary (e.g. Ruffine et al 2018a;Hensen et al 2019):…”

Section: Discussionmentioning

confidence: 99%

“…During the third leg, sediment samples from long-gravity cores were collected to complete dat-ing of seismic reflector surfaces in view of establishing chronostratigraphy for the last hundred thousand years. A Special Issue, entitled "Fluids and processes at the seismically active fault zone in the Sea of Marmara", was published in 2018 in Deep Sea Research, Part II, provid-ing the state of knowledge on the links between fluids, faults, seismicity and the hydrocarbon system in the Sea of Marmara (Ruffine et al 2018a). A new strategy was deployed during the MarsiteCruise for gas-seep sampling and for developing new proxies to relate fluid properties to fluid migration history.…”

Section: Fluid Emissions and Their Originmentioning

confidence: 99%

A review of 20 years (1999–2019) of Turkish–French collaboration in marine geoscience research in the Sea of Marmara

2021

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This paper retraces the history and main achievements of the ongoing Turkish-French collaboration in marine geoscience research in the Sea of Marmara, which was initiated in the aftermath of the 1999, Izmit and Duzce earthquakes. The collaboration resulted in nine large oceanographic cruises along with six recovery operations involving diverse vessels, and in the participation in two major EU-funded programmes (ESONET-NoE and MARSITE) and to one bilateral project, e.g. the MAREGAMI Project, co-funded by TUBITAK and ANR (the Turkish and French national funding agencies for research, respectively). In this paper, we review the major scientific contributions on the tectonic evolution of the North-Anatolian Fault in the Marmara Region; on the relationships between faulting, seismicity, fluids and ecosystems; and on paleo-seismology and paleo-oceanography in the Sea of Marmara.Technical Research Council of Turkey (TUBİTAK) initiated the Turkish Marine Programme, coordinated by Naci Görur and funded by the State Planning Organization of Turkey (DPT). The programme had access to the research vessels of Mineral Research and Exploration Directorate of Turkey (MTA) and Turkish Naval Forces-Office of Navigation, Hydrography and Oceanography (SHOD). The programme acquired 2200 km of multi-channel seismic reflection lines, with MTA's R/V Sismik-1 (see review in Imren et al. 2001, p. 145). Two different groups, from Istanbul Technical University (ITU) and from the University of Cambridge, respectively, proposed two different tectonic interpretations, reflecting the contrasting views that prevailed at that time, based on land observations. Okay et al. ( ) supported Pinar's (1943 early idea of a single through-going fault, later called the "Main Marmara Fault" (MMF; Le , bisecting the Gulf of Izmit and the three Mar-mara deeps, in agreement with the view of Şengör (1979) and Şengör et al. (1985). In contrast, Parke et al. (1999) sup-ported the view depicting the Sea of Marmara as a rift basin with en echelon faulting and little or no strike-slip fault in the central Marmara Sea (e.g. Armijo et al. 1999). In Febru-ary 1999, multibeam bathymetric data were collected and sediment pore fluids were sampled from the deep Marmara basins during R/V Meteor cruise 44 (Halbach et al. 2000), identifying methane anomalies, suggesting the existence of an active hydrological system associated with the submarine fault system.

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Magnetic properties of gas hydrate-bearing sediments and their association with iron geochemistry in the Sea of Marmara, Turkey

Yang

Zhang

et al. 2023

Chemical Geology

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Fluids and processes at the seismically active fault zone in the Sea of Marmara

Cited by 4 publications

References 25 publications

Interpretation of Late‐Pleistocene/Holocene Transition in the Sea of Marmara From Geochemistry of Bulk Carbonates

Interpretation of Late‐Pleistocene/Holocene Transition in the Sea of Marmara From Geochemistry of Bulk Carbonates

A review of 20 years (1999–2019) of Turkish–French collaboration in marine geoscience research in the Sea of Marmara

Magnetic properties of gas hydrate-bearing sediments and their association with iron geochemistry in the Sea of Marmara, Turkey

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