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  • PANGAEA  (4)
  • AGU (American Geophysical Union)  (3)
  • Cham : Imprint: Springer  (1)
  • Copernicus Publications on behalf of the European Geosciences Union  (1)
  • 1
    Online-Ressource
    Online-Ressource
    World Atlas of Submarine Gas Hydrates in Continental Margins (2022)
    Cham : Springer International Publishing | Cham : Imprint: Springer
    Details Verfügbarkeit
    Schlagwort(e): Oceanography. ; Water. ; Fossil fuels. ; Physical geography. ; Business. ; Management science. ; Erde ; Kontinentalrand ; Gashydrate ; Offshore-Vorkommen ; Geologie ; Seismik ; Schelf ; Methanlagerstätte ; Erdgasgeologie ; Gashydrate ; Seismische Prospektion ; Vorkommen
    Beschreibung / Inhaltsverzeichnis: Part I. A History of gas hydrate research -- Chapter 1. Gas Hydrate Research: From the Laboratory to the Pipeline -- Chapter 2. Shallow gas hydrates near 64° N, off Mid-Norway: Concerns regarding drilling and production technologies -- Chapter 3. Finding and using the world’s gas hydrates -- Part II. Gas Hydrate Fundamentals -- Chapter 4. Seismic rock physics of gas-hydrate bearing sediments -- Chapter 5. Estimation of gas hydrates in the pore space of sediments using inversion methods -- Chapter 6. Electromagnetic applications in methane hydrate reservoirs -- Part III. Gas Hydrate Drilling for Research and Natural Resources -- Chapter 7. Hydrate Ridge - A gas hydrate system in a subduction zone setting -- Chapter 8. Northern Cascadia Margin gas hydrates – Regional geophysical surveying, IODP drilling Leg 311 and cabled observatory monitoring -- Chapter 9. Accretionary wedge tectonics and gas hydrate distribution in the Cascadia forearc -- Chapter 10. Bottom Simulating Reflections below the Blake Ridge, western North Atlantic Margin -- Chapter 11. A review of the exploration, discovery, and characterization of highly concentrated gas hydrate accumulations in coarse-grained reservoir systems along the Eastern Continental Margin of India -- Chapter 12. Ulleung Basin Gas Hydrate Drilling Expeditions, Korea: Lithologic characteristics of gas hydrate-bearing sediments -- Chapter 13. Bottom simulating reflections in the South China Sea -- Chapter 14. Gas hydrate and fluid related seismic indicators across the passive and active margins off SW Taiwan -- Chapter 15. Gas Hydrate Drilling in the Nankai Trough, Japan -- Chapter 16. Alaska North Slope Terrestrial Gas Hydrate Systems: Insights from Scientific Drilling -- Part IV -- Arctic -- Chapter 17. Gas Hydrates on Alaskan Marine Margins -- Chapter 18. Gas Hydrate related bottom-simulating reflections along the west-Svalbard margin, Fram Strait -- Chapter 19. Occurrence and distribution of bottom simulating reflections in the Barents Sea -- Chapter 20. Svyatogor Ridge - A gas hydrate system driven by crustal scale processes -- Chapter 21. Gas hydrate potential in the Kara Sea -- Part V. Greenland and Norwegian Sea -- Chapter 22. Geophysical indications of gas hydrate occurrence on the Greenland continental margins -- Chapter 23. Gas hydrates in the Norwegian Sea -- Part VI. North Atlantic. Chapter 24. U.S. Atlantic Margin Gas Hydrates -- Chapter 25. Gas Hydrates and submarine sediment mass failure: A case study from Sackville Spur, offshore Newfoundland -- Chapter 26. Bottom Simulating Reflections and Seismic Phase Reversals in the Gulf of Mexico -- Chapter 27. Insights into gas hydrate dynamics from 3D seismic data, offshore Mauritania -- Part VII. South Atlantic -- Chapter 28. Distribution and Character of Bottom Simulating Reflections in the Western Caribbean Offshore Guajira Peninsula, Colombia -- Chapter 29. Gas hydrate systems on the Brazilian continental margin -- Chapter 30. Gas hydrate on the southwest African continental margin -- Chapter 31. Shallow gas hydrates associated to pockmarks in the Northern Congo deep-sea fan, SW Africa -- Part VIII. Pacific -- Chapter 32. Gas hydrate-bearing province off eastern Sakhalin slope -- Chapter 33. Tectonic BSR Hypothesis in the Peruvian margin: A forgotten way to see marine gas hydrate systems at convergent margins -- Chapter 34. Gas hydrate and free gas along the Chilean Continental Margin -- Chapter 35. New Zealand’s Gas Hydrate Systems -- Part IX. Indic -- Chapter 36. First evidence of bottom simulation reflectors in the western Indian Ocean offshore Tanzania -- Part X. Mediterranean Sea -- Chapter 37. A Gas Hydrate System of Heterogenous Character in the Nile Deep-Sea Fan -- Part XI. Black Sea -- Chapter 38. Gas hydrate accumulations in the Black Sea -- Part XII. Lake Baikal -- Chapter 39. The position of gas hydrates in the sedimentary strata and in the geological structure of Lake Baikal -- Part XIII. Antarctic -- Chapter 40. Bottom Simulating Reflector in the western Ross Sea Antarctica -- Chapter 41. Bottom Simulating Reflectors along the Scan Basin, a deep-sea gateway between the Weddell Sea (Antarctica) and Scotia Sea -- Chapter 42. Bottom Simulating Reflections in Antarctica -- Part XIV. Where Gas Hydrate Dissociates Seafloor Microhabitats Flourish. Chapter 43. Integrating fine-scale habitat mapping and pore water analysis in cold seep research: A case study from the SW Barents Sea.
    Materialart: Online-Ressource
    Seiten: 1 Online-Ressource(XXI, 515 p. 311 illus., 296 illus. in color.)
    Ausgabe: 1st ed. 2022.
    ISBN: 9783030811860
    Serie: Springer eBook Collection
    URL: https://doi.org/10.1007/978-3-030-81186-0
    DOI: 10.1007/978-3-030-81186-0
    Sprache: Englisch
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
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    Unbekannt
    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publikationsdatum: 2023-05-12
    Schlagwort(e): Area/locality; Conductivity, average; ELEVATION; Heat flow; LATITUDE; LONGITUDE; Method comment; Number; Sample, optional label/labor no; Temperature gradient
    Materialart: Dataset
    Format: text/tab-separated-values, 182 data points
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    DATA PANGAEA
  • 3
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    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publikationsdatum: 2023-06-01
    Schlagwort(e): Area/locality; Conductivity, average; ELEVATION; Heat flow; LATITUDE; LONGITUDE; Method comment; Number; Sample, optional label/labor no; Temperature gradient
    Materialart: Dataset
    Format: text/tab-separated-values, 97 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 4
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    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publikationsdatum: 2023-05-12
    Schlagwort(e): Area/locality; Conductivity, average; ELEVATION; Heat flow; LATITUDE; LONGITUDE; Method comment; Number; Sample, optional label/labor no; Temperature gradient
    Materialart: Dataset
    Format: text/tab-separated-values, 160 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 5
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    Marine Multi-channel seismic data from Cruise EW9509 Line 38 in 1995 Taiwan (2022)
    PANGAEA
    Details
    Publikationsdatum: 2024-06-26
    Beschreibung: This is a dataset that has been acquired in 1995 as part of the U.S.-ROC Deep Seismic Imaging Study of the Taiwan Arc-Continent Collision (TAICRUST) project. This particular line was measured in the Taiwan Strait in September 1995 to image the shallow sediments and upper crust. Additional information from the Cruise EW9509 is stored at the Marine Geoscience Data System (MGDS).
    Schlagwort(e): Binary Object; EW9509; EW9509_Line38; Maurice Ewing; multi-channel seismic reflection; raw data; SEIS; Seismic
    Materialart: Dataset
    Format: text/tab-separated-values, 19 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 6
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    Seasonal changes in gaseous elemental mercury in relation to monsoon cycling over the northern South China Sea (2012)
    Copernicus Publications on behalf of the European Geosciences Union
    Details
    Publikationsdatum: 2022-05-25
    Beschreibung: © The Author(s), 2012. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Atmospheric Chemistry and Physics 12 (2012): 7341-7350, doi:10.5194/acp-12-7341-2012.
    Beschreibung: The distribution of gaseous elemental mercury (GEM) was determined in the surface atmosphere of the northern South China Sea (SCS) during 12 SEATS cruises between May 2003 and December 2005. The sampling and analysis of GEM were performed on board ship by using an on-line mercury analyzer (GEMA). Distinct annual patterns were observed for the GEM with a winter maximum of 5.7 ± 0.2 ng m−3 (n = 3) and minimum in summer (2.8 ± 0.2; n = 3), with concentrations elevated 2–3 times global background values. Source tracking through backward air trajectory analysis demonstrated that during the northeast monsoon (winter), air masses came from Eurasia, bringing continental- and industrial-derived GEM to the SCS. In contrast, during summer southwest monsoon and inter-monsoon, air masses were from the Indochina Peninsula and Indian Ocean and west Pacific Ocean. This demonstrates the impact that long-range transport, as controlled by seasonal monsoons, has on the Hg atmospheric distribution and cycling in the SCS.
    Beschreibung: Support was provided by the National Science Council (Taiwan, Republic of China) through grant number NSC 97-2745-M-002-001-;98- 2611-M-002-013- and through a thematic research grant titled “Atmospheric Forcing on Ocean Biogeochemistry (AFOBi)” and from the College of Science (COS#1010023540), National Taiwan University (NTU#101R3252) through a grant of the NTU “Aim for Top University Project” under research platform of the “Drunken-Moon Lake” scientific integration.
    Repository-Name: Woods Hole Open Access Server
    Materialart: Article
    Format: application/pdf
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    ARTIKEL (OA)
  • 7
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    A Shallow Seabed Dynamic Gas Hydrate System off SW Taiwan: Results From 3‐D Seismic, Thermal, and Fluid Migration Analyses (2020)
    AGU (American Geophysical Union) | Wiley
    Details
    Publikationsdatum: 2023-02-08
    Beschreibung: Large amounts of methane, a potent greenhouse gas, are stored in hydrates beneath the seafloor. Sea level changes can trigger massive methane release into the ocean. It is not clear, however, whether surficial seafloor processes can cause comparable discharge. Previously, fluid migration was difficult to study due to a lack of spatially dense seismic and thermal observations. Here we examine a gas hydrate site at Four‐Way‐Closure Ridge off SW Taiwan using a high‐resolution 3‐D seismic cube, together with bottom‐simulating reflections (BSRs) mapped in the cube, a thermal probe data set, and 3‐D thermal modeling results. We document, on a scale of tens of meters, the interaction between surficial sedimentary processes, fluid flow, and a dynamic gas hydrate system. Fluid migrates upward through dipping permeable strata in the limb, the slope basin, and along thrust faults and ridge‐top normal faults. The seismic data also reveal several double BSRs that underlie seabed sedimentary sliding and depositional features. Abrupt changes in subsurface pressure and temperature due to the rapid seabed sedimentary processes can cause a rapid shift of the base of the gas hydrate stability zone. This shift may be either downward or upward and would result in the accumulation or dissociation of hydrate in sediments sandwiched by the double BSRs, respectively. We propose that dynamic surficial processes on the seafloor together with shallow focused fluid flow affect hydrate distribution and saturation at depth and may even result in methane expulsion into the ocean if such localized features are common along convergent plate boundaries.
    Materialart: Article , PeerReviewed
    Format: text
    Format: text
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  • 8
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    A rapid numerical method to constrain 2D focused fluid flow rates along convergent margins using dense BSR‐based temperature field data (2021)
    AGU (American Geophysical Union) | Wiley
    Details
    Publikationsdatum: 2024-02-07
    Beschreibung: Estimates of the sub-seabed fluid flow rates are important for understanding hydrological budgets, biogeochemical cycles, and physical properties of the sediments. Fluid flow rates and directions, however, are difficult to measure, particularly beneath the seafloor. We developed a rapid method to estimate regional fluid migration rates using an extensive database of seismic reflection profiles taken offshore SW Taiwan. We observe bottom-simulating reflector (BSR) that deflect towards the seafloor near thrust faults that indicate localized heat flow variations. At these sites, advecting warm pore fluids transport heat to shallower depths and force the BSR shallower. Our 2-D steady-state numerical method quantifies the fluid flow rates required to cause such thermal anomalies. We found that fluid flow rates near the trench of the accretionary wedge range between 0.1 to 16 m3 yr-1 m-1, with slower and faster rates generally associated with slope basin discontinuities and faults, respectively. To evaluate the fluid pattern evolution from subduction to collision, we studied three transects: one along the Manila subduction zone in the south and two in Taiwan’s initial collision zone in the north. We quantified the fluid budget and partitioning of fluid flow between focused discharge through faults and diffusive flow through the wedge. Faults in Taiwan’s accretionary wedge capture on average 25% of the total dewatering flux in the younger subduction zone and 38.5% in the tectonically mature collision zone. Our method provides estimates of fluid migration rates along convergent plate boundaries, and contributes to our understanding of focused fluid flow processes in many other regions.
    Materialart: Article , PeerReviewed
    Format: text
    Format: other
    Format: text
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  • 9
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    Episodic Venting of a Submarine Gas Seep on Geological Time Scales: Formosa Ridge, Northern South China Sea (2022)
    AGU (American Geophysical Union) | Wiley
    Details
    Publikationsdatum: 2024-02-07
    Beschreibung: The Formosa Ridge cold seep is among the first documented active seeps on the northern South China Sea passive margin slope. Although this system has been the focus of scientific studies for decades, the geological factors controlling gas release are not well understood due to a lack of constraints of the subsurface structure and seepage history. Here, we use high-resolution 3D seismic data to image stratigraphic and structural relationships associated with fluid expulsion, which provide spatio-temporal constraints on the gas hydrate system at depth and methane seepage at modern and paleo seafloors. Gas has accumulated beneath the base of gas hydrate stability to a critical thickness, causing hydraulic fracturing, propagation of a vertical gas conduit, and morphological features (mounds) at paleo-seafloor horizons. These mounds record multiple distinct gas migration episodes between 300,000 and 127,000 years ago, separated by periods of dormancy. Episodic seepage still seems to occur at the present day, as evidenced by two separate fronts of ascending gas imaged within the conduit. We propose that episodic seepage is associated with enhanced seafloor sedimentation. The increasing overburden leads to an increase in effective horizontal stress that exceeds the gas pressure at the top of the gas reservoir. As a result, the conduit closes off until the gas reservoir is replenished to a new (greater) critical thickness to reopen hydraulic fractures. Our results provide intricate detail of long-term methane flux through sub-seabed seep systems, which is important for assessing its impact on seafloor and ocean biogeochemistry. Key Points - Gas has accumulated beneath the base of gas hydrate stability, causing vertical gas conduit formation and seabed mounds - Mounds imaged within the conduit record episodic seepage between 300 and 127 kyrs ago - Quiescence may be associated with enhanced seafloor sedimentation that increases effective stress at the top of the gas reservoir
    Materialart: Article , PeerReviewed
    Format: text
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