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  • 1
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    Yam Seep at Four-Way Closure Ridge: a prominent active gas seep system at the accretionary wedge SW offshore Taiwan (2023)
    Springer
    Details
    Publication Date: 2024-02-07
    Description: Hydroacoustic surveys at the accretionary wedge southwest of Taiwan reveal a confined active hydrocarbon seepage area of ~ 49,000 m 2 in ~ 1350 m water depth on the northern crest of the Four-Way Closure Ridge, which we call Yam Seep. In this study, multibeam and side-scan sonar data acquired during surveys with an autonomous underwater vehicle during an expedition with R/V Ocean Researcher I in 2017 showed that the area is characterized by rough topography and high seafloor backscatter. Seafloor observations with a video sled and sediment sampling with gravity corers and the MeBo seafloor drill rig during an expedition with R/V SONNE in 2018 revealed that the area is almost entirely covered by intensely fractured methane-derived carbonates, which indicate that seepage has been ongoing for thousands of years. Hydroacoustic anomalies (‘flares’) in the water column indicated the presence of several gas bubble emission sites mostly at the center and eastern flank of the area in 2019. Drilling through massive carbonates in the northwestern part of Yam Seep induced free gas escape from a depth of ~ 5.1 m. This suggests the presence of gas hydrates in the subsurface as the seep area is located well within the gas hydrate stability zone. The inter-disciplinary investigations of the Yam Seep demonstrate that upward migration of light hydrocarbons and seafloor discharge has a considerable influence on the seabed properties.
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 2
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    Uranium - Thorium dating results from bivalve shell samples of sediment core GeoB23225-1 (Table 3) (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Age, dated; Age, dated standard deviation; Age, Thorium corrected; Authigenic Carbonate; Center for Marine Environmental Sciences; Cold seeps; Corrected, using the decay constants by Cheng et al. (2013); DEPTH, sediment/rock; gas hydrate; GeoB23225-1; Identification; Laboratory code/label; MARUM; MeBo200; Offshore Taiwan, South China Sea; SO266; SO266_25-1; SO266/1; Sonne_2; South China Sea; Taiwan; Thorium-230/Thorium-227 activity ratio; Thorium-230/Thorium-227 activity ratio, standard deviation; Thorium-230/Uranium-238 activity ratio; Thorium-230/Uranium-238 activity ratio, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-238; Uranium-238, standard deviation; U-Th dating; δ234 Uranium; δ234 Uranium, standard deviation; δ234 Uranium (0); δ234 Uranium (0), standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 90 data points
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    DATA PANGAEA
  • 3
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    Uranium-Thorium dating of authigenic carbonates and shells from Yam Seep, South China Sea (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Description: This data presents high precision Th/U ages from seep carbonates obtained from a 5-meter-long rock core (GeoB 23225-1, MeBo24) collected by the sea floor drill rig MARUM-MeBo200 in Yam Seep, SW offshore Taiwan during SO266, RV Sonne. The dating results provide records of over 40 thousand years old gas seepage and an unconventional precipitation sequence throughout the 5-meter downcore. The oldest age presents at ~192 cmbsf and the youngest age at the lower end of the core (~490 cmbsf). It provides insights into gas seepage episodes at active margin as well as precipitation sequences influenced by fracturing. Uranium and thorium isotope measurements were performed at the Institute of Environmental Physics multi-collector ICPMS facility in Heidelberg, which hosts a ThermoFisher Neptuneplus MC-ICPMS following the method of Wefing et al., (2017) and Frank and Hemsing (2021). Coordinate GeoB 23225-1 (Lat. Lon.): 22° 03.487' 119° 47.979'; Water depth: 1352 mbsl.
    Keywords: Authigenic Carbonate; Center for Marine Environmental Sciences; Cold seeps; gas hydrate; MARUM; SO266; South China Sea; Taiwan; U-Th dating
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 4
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    Uranium - Thorium dating results from carbonate samples of sediment core GeoB23225-1 (Table 2) (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Age, dated; Age, dated standard deviation; Age, Thorium corrected; Authigenic Carbonate; Center for Marine Environmental Sciences; Cold seeps; Corrected, using the decay constants by Cheng et al. (2013); DEPTH, sediment/rock; Description; gas hydrate; GeoB23225-1; Interval; Laboratory code/label; MARUM; MeBo200; Offshore Taiwan, South China Sea; Sample code/label; Section; SO266; SO266_25-1; SO266/1; Sonne_2; South China Sea; Taiwan; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230/Uranium-238 activity ratio; Thorium-230/Uranium-238 activity ratio, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-238; Uranium-238, standard deviation; U-Th dating; δ234 Uranium; δ234 Uranium, standard deviation; δ234 Uranium (0); δ234 Uranium (0), standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 2147 data points
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    DATA PANGAEA
  • 5
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    Concentrations and stable C and H isotopic compositions of methane in sediment core GeoB24376-2 from the Calabrian accretionary wedge, RV Sonne cruise SO278 (2023)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Shallow sediment cores were collected with a gravity corer and a multi corer from several sites at the Sartori Mud Volcano in the Calabrian accretionary prism during cruise SO278 with R/V SONNE. In order to determine ex-situ concentrations and stable C and H isotopic compositions of methane dissolved in pore water, sediment samples were taken from the sediment cores with cut-off syringes and transferred into glass vials. Methane concentrations in the headspace gas were determined by use of gas chromatography (GC) and used to calculate concentrations of methane dissolved in pore water (uncorrected for sediment porosity and Bunsen coefficient). Stable C and H isotopic compositions of methane were determined by use of GC-isotope ratio mass spectrometry.
    Keywords: Calabrian accretionary prism; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Device type; Gas chromatography; Gas chromatography - Mass spectrometry (GC-MS); GC; GeoB24376-2; GPF 19-2-007H; Gravity corer; Headspace Gas; Ionian Sea; MARUM; Mediterranean Ridge accretionary complex; Mediterranean Sea; Methane; Methane concentration; Optional event label; pore water dissolved methane; R/V SONNE; Sample type; Sartori mud volcano; SO278; SO278_76-2; Sonne_2; stable carbon isotope; stable hydrogen isotope (0); Uncorrected; δ13C, methane; δ Deuterium, methane
    Type: Dataset
    Format: text/tab-separated-values, 38 data points
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  • 6
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    Contents of total carbon, inorganic carbon, organic carbon, and total nitrogen as well as Corg/Ntotal values of sediment core GeoB24303-1 from Calabrian accretionary prism (R/V Sonne cruise SO278) (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Shallow sediment cores were collected with a gravity corer from several sites at the Sartori Mud Volcano in the Calabrian accretionary prism during cruise SO278 with R/V SONNE. In order to determine Corg/Ntot values (orgainc carbon/total nitrogen), as well as contents of total carbon, inorganic carbon and organic carbon, sediment samples were taken from the sediment cores with cut-off syringes and transferred into glass vials. The sediment samples were analyzed with a vario EL III elemental analyzer (Elementar Analysensysteme GmbH). Contents of organic carbon were determined after removal of inorganic carbon through acidification.
    Keywords: Calcium carbonate, per unit sediment mass; Carbon, inorganic, total, per unit sediment mass; Carbon, organic, per unit sediment mass; Carbon, organic/Nitrogen, total ratio; Carbon, total, per unit sediment mass; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Device type; GC; GeoB24303-1; GPF 19-2-007H; Gravity corer; MARUM; Mediterranean Sea; Nitrogen, total, per unit sediment mass; OceanFloor_EUI; Sample type; SO278; SO278_3-1; Sonne_2; The Ocean Floor – Earth's Uncharted Interface; Uncorrected
    Type: Dataset
    Format: text/tab-separated-values, 160 data points
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  • 7
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    Contents of total carbon, inorganic carbon, organic carbon, and total nitrogen as well as Corg/Ntotal values of sediment core GeoB24366_1 from Calabrian accretionary prism (R/V Sonne cruise SO278) (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Shallow sediment cores were collected with a gravity corer from several sites at the Sartori Mud Volcano in the Calabrian accretionary prism during cruise SO278 with R/V SONNE. In order to determine Corg/Ntot values (orgainc carbon/total nitrogen), as well as contents of total carbon, inorganic carbon and organic carbon, sediment samples were taken from the sediment cores with cut-off syringes and transferred into glass vials. The sediment samples were analyzed with a vario EL III elemental analyzer (Elementar Analysensysteme GmbH). Contents of organic carbon were determined after removal of inorganic carbon through acidification.
    Keywords: Calcium carbonate, per unit sediment mass; Carbon, inorganic, total, per unit sediment mass; Carbon, organic, per unit sediment mass; Carbon, organic/Nitrogen, total ratio; Carbon, total, per unit sediment mass; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Device type; GC; GeoB24366-1; GPF 19-2-007H; Gravity corer; MARUM; Mediterranean Sea; Nitrogen, total, per unit sediment mass; OceanFloor_EUI; Sample type; SO278; SO278_66-1; Sonne_2; The Ocean Floor – Earth's Uncharted Interface; Uncorrected
    Type: Dataset
    Format: text/tab-separated-values, 144 data points
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  • 8
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    Contents of total carbon, inorganic carbon, organic carbon, and total nitrogen as well as Corg/Ntotal values of sediment core GeoB24373_1 from Calabrian accretionary prism (R/V Sonne cruise SO278) (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Shallow sediment cores were collected with a gravity corer from several sites at the Sartori Mud Volcano in the Calabrian accretionary prism during cruise SO278 with R/V SONNE. In order to determine Corg/Ntot values (orgainc carbon/total nitrogen), as well as contents of total carbon, inorganic carbon and organic carbon, sediment samples were taken from the sediment cores with cut-off syringes and transferred into glass vials. The sediment samples were analyzed with a vario EL III elemental analyzer (Elementar Analysensysteme GmbH). Contents of organic carbon were determined after removal of inorganic carbon through acidification.
    Keywords: Calcium carbonate, per unit sediment mass; Carbon, inorganic, total, per unit sediment mass; Carbon, organic, per unit sediment mass; Carbon, organic/Nitrogen, total ratio; Carbon, total, per unit sediment mass; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Device type; GC; GeoB24373-1; GPF 19-2-007H; Gravity corer; MARUM; Mediterranean Sea; Nitrogen, total, per unit sediment mass; OceanFloor_EUI; Sample type; SO278; SO278_73-1; Sonne_2; The Ocean Floor – Earth's Uncharted Interface; Uncorrected
    Type: Dataset
    Format: text/tab-separated-values, 136 data points
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  • 9
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    Contents of total carbon, inorganic carbon, organic carbon, and total nitrogen as well as Corg/Ntotal values of sediment core GeoB24374_1 from Calabrian accretionary prism (R/V Sonne cruise SO278) (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Shallow sediment cores were collected with a gravity corer from several sites at the Sartori Mud Volcano in the Calabrian accretionary prism during cruise SO278 with R/V SONNE. In order to determine Corg/Ntot values (orgainc carbon/total nitrogen), as well as contents of total carbon, inorganic carbon and organic carbon, sediment samples were taken from the sediment cores with cut-off syringes and transferred into glass vials. The sediment samples were analyzed with a vario EL III elemental analyzer (Elementar Analysensysteme GmbH). Contents of organic carbon were determined after removal of inorganic carbon through acidification.
    Keywords: Calcium carbonate, per unit sediment mass; Carbon, inorganic, total, per unit sediment mass; Carbon, organic, per unit sediment mass; Carbon, organic/Nitrogen, total ratio; Carbon, total, per unit sediment mass; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Device type; GC; GeoB24374-1; GPF 19-2-007H; Gravity corer; MARUM; Mediterranean Sea; Nitrogen, total, per unit sediment mass; OceanFloor_EUI; Sample type; SO278; SO278_74-1; Sonne_2; The Ocean Floor – Earth's Uncharted Interface; Uncorrected
    Type: Dataset
    Format: text/tab-separated-values, 112 data points
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  • 10
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    Contents of total carbon, inorganic carbon, organic carbon, and total nitrogen as well as Corg/Ntotal values of sediment core GeoB24375_1 from Calabrian accretionary prism (R/V Sonne cruise SO278) (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Shallow sediment cores were collected with a gravity corer from several sites at the Sartori Mud Volcano in the Calabrian accretionary prism during cruise SO278 with R/V SONNE. In order to determine Corg/Ntot values (orgainc carbon/total nitrogen), as well as contents of total carbon, inorganic carbon and organic carbon, sediment samples were taken from the sediment cores with cut-off syringes and transferred into glass vials. The sediment samples were analyzed with a vario EL III elemental analyzer (Elementar Analysensysteme GmbH). Contents of organic carbon were determined after removal of inorganic carbon through acidification.
    Keywords: Calcium carbonate, per unit sediment mass; Carbon, inorganic, total, per unit sediment mass; Carbon, organic, per unit sediment mass; Carbon, organic/Nitrogen, total ratio; Carbon, total, per unit sediment mass; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Device type; GC; GeoB24375-1; GPF 19-2-007H; Gravity corer; MARUM; Mediterranean Sea; Nitrogen, total, per unit sediment mass; OceanFloor_EUI; Sample type; SO278; SO278_75-1; Sonne_2; The Ocean Floor – Earth's Uncharted Interface; Uncorrected
    Type: Dataset
    Format: text/tab-separated-values, 112 data points
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