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  • 1
    Online Resource
    Online Resource
    PLOT: Paläolimnologischer Transekt - Quartäre Klimagradienten entlang des nördlichen Eurasiens und Potentiale für Tiefbohrungen : Abschlussbericht : Nov. 2016 - Okt. 2018 : Teilprojekte: TP1 "Koordination" und "Paläoklimatologie" (Universität zu Köln); TP2 "Seismik" (Universität zu Kiel); TP3 "Isotope" und "Modellierung" (AWI Potsdam und Bremerhaven) (2019)
    Köln : Universität zu Köln
    Details Availability
    Keywords: Forschungsbericht ; Eurasien Nord ; Ladogasee ; Holozän ; Paläoklima
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (73 Seiten, 89,98 MB) , Illustrationen, Diagramme
    URL: https://doi.org/10.2314/KXP:1671612736
    DOI: 10.2314/KXP:1671612736
    Language: German
    Note: Förderkennzeichen BMBF 03G0859A-C. - Verbund-Nummer 01161585 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
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  • 2
    Online Resource
    Online Resource
    Fault patterns, fault activity reconstructions and a new source candidate for tsunamis in the Messina Strait, Southern Italy (2015)
    Details Availability
    Keywords: Hochschulschrift ; Straße von Messina ; Tektonik ; Tsunami
    Type of Medium: Online Resource
    Pages: Online-Ressource
    URL: http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-175566
    URL: http://d-nb.info/1077007094/34
    URL: http://macau.uni-kiel.de/receive/dissertation_diss_00017556
    URN: urn:nbn:de:gbv:8-diss-175566
    DDC: 550
    Language: English
    Note: Kiel, Univ., Diss., 2015
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  • 3
    Online Resource
    Online Resource
    Korrelation von seismischen und Bohrlochdaten am Beispiel des Van-Sees (Osttürkei) (2011)
    Kiel
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (34 Blatt = 29 MB) , Illustrationen, Diagramme
    URL: https://oceanrep.geomar.de/12586/
    Language: German
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  • 4
    Book
    Book
    Erdbeben, Hangrutschungen, Tsunamis und andere Gefahren aus dem Meer : Begleitheft zum Vortrag [am 30. Juni 2009] (2009)
    Kiel : Ozean der Zukunft, Die Kieler Meereswissenschaften
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Book
    Pages: [24] S. , Ill.
    Series Statement: Kinder- und Schüleruni Kiel : für Schülerinnen und Schüler von 8 bis 16 Jahren 2009.06,30
    Language: German
    Note: Auch als elektronisches Dokument vorh
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  • 5
    Online Resource
    Online Resource
    Reconstruction of retreating mass wasting in response to progressive slope steepening of the northeastern Cretan margin, eastern Mediterranean (2010)
    Associated volumes
    Details Availability
    In: Marine geology, Amsterdam [u.a.] : Elsevier Science, 1964, 271(2010), 1/2, Seite 44-54, 1872-6151
    In: volume:271
    In: year:2010
    In: number:1/2
    In: pages:44-54
    Description / Table of Contents: In this study we aim on a reconstruction of mechanisms and kinematics of slope-failure and mass-movement processes along the northeastern slope of Crete in the Hellenic forearc, eastern Mediterranean. Here, subsidence of the forearc basin and the uplift of the island of Crete cause ongoing steepening of the slope in-between. The high level of neotectonic activity in this region is expected to exert a key role in slope-failure development. Newly acquired reflection seismic data from the upper slope region reveal an intact sediment cover while the lower slope is devoid of both intact strata and mass-transport deposits (MTDs). In a mid-slope position, however, we found evidence for a not, vert, similar 4-km3-sized landslide complex that comprises several MTDs from translational transport of coherent sediment bodies over short distances. Morphometric analysis of these MTDs and their source scars indicates that this part of the northeast Cretan slope can be characterized as a cohesive slope. Furthermore, we reconstruct retrogressive development for this complex and determine a critical slope angle for both pre-conditioning of failure and subsequent landslide deposition near source scars. Consequently, data imply that the investigated shallower slope is stable due to low angles in the order of 3°, whereas 5°-inclined mid-slope portions favour both slope destabilization and landslide deposition. The failed mid-slope parts are dominated by sediment truncations from faults almost correlating with the orientation of head- and sidewalls of scars. We suggest that cohesive landslides and MTDs are generated and preserved, respectively, in such critical slope regions. If once generated, cohesive landslides reach the lower slope further downslope that exceeds the threshold gradient for MTD deposition (not, vert, similar 5°), they are transported all the way down to the foot of the slope and disintegrate to mass flows. From these observations we suggest that the mass-wasting history of the investigated Cretan slope area over a longer period of time is characterized by repeated sediment erosion and transport into the deeper Cretan Sea basin. The relocation of the critical slope portion in upslope direction and therefore recurrence of mass-wasting events is thereby likely controlled by the progressive steepening of the slope. This mechanism and restriction of sediment failure to narrow, critically-inclined and relocating slope portions likely explains how such an active margin setting can exhibit only scarce findings of MTDs on the slope despite an expected, extensive and widespread mass wasting.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1872-6151
    DOI: 10.1016/j.margeo.2010.01.008
    Language: English
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  • 6
    Online Resource
    Online Resource
    Late Quaternary climatic events and sea-level changes recorded by turbidite activity, Dakar Canyon, NW Africa (2010)
    Associated volumes
    Details Availability
    In: Quaternary research, Cambridge : Cambridge University Press, 1970, 73(2010), 2, Seite 385-392, 1096-0287
    In: volume:73
    In: year:2010
    In: number:2
    In: pages:385-392
    Description / Table of Contents: The relationship of sea-level changes and short-term climatic changes with turbidite deposition is poorly documented, although the mechanisms of gravity-driven sediment transport in submarine canyons during sea-level changes have been reported from many regions. This study focuses on the activity of the Dakar Canyon off southern Senegal in response to major glacial/interglacial sea-level shifts and variability in the NW-African continental climate. The sedimentary record from the canyon allows us to determine the timing of turbidite events and, on the basis of XRF-scanning element data, we have identified the climate signal at a sub-millennial time scale from the surrounding hemipelagic sediments. Over the late Quaternary the highest frequency in turbidite activity in the Dakar Canyon is confined to major climatic terminations when remobilisation of sediments from the shelf was triggered by the eustatic sea-level rise. However, episodic turbidite events coincide with the timing of Heinrich events in the North Atlantic. During these times continental climate has changed rapidly, with evidence for higher dust supply over NW Africa which has fed turbidity currents. Increased aridity and enhanced wind strength in the southern SaharanSahelian zone may have provided a source for this dust.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1096-0287
    DOI: 10.1016/j.yqres.2009.07.010
    Language: English
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  • 7
    Online Resource
    Online Resource
    Submarine Geomorphology (2018)
    Cham : Springer
    Details Availability
    Keywords: Earth sciences ; Earth Sciences ; Geology ; Oceanography ; Geomorphology ; Meereskunde ; Meeresboden ; Meeresgeologie ; Meeressediment ; Geomorphologie ; Meeresboden ; Sonar ; Topografie ; Hydroakustik ; Relief ; Geomorphographie
    Description / Table of Contents: This book on the current state of knowledge of submarine geomorphology aims to achieve the goals of the Submarine Geomorphology working group, set up in 2013, by establishing submarine geomorphology as a field of research, disseminating its concepts and techniques among earth scientists and professionals, and encouraging students to develop their skills and knowledge in this field. Editors have invited 30 experts from around the world to contribute chapters to this book, which is divided into 4 sections - (i) Introduction & history, (ii) Data & methods, (ii) Submarine landforms & processes and (iv) Conclusions & future directions. Each chapter provides a review of a topic, establishes the state-of-the-art, identifies the key research questions that need to be addressed, and delineates a strategy on how to achieve this. Submarine geomorphology is a priority for many research institutions, government authorities and industries globally. The book is useful for undergraduate and graduate students, and professionals with limited training in this field
    Type of Medium: Online Resource
    Pages: Online-Ressource (XIII, 556 p. 195 illus., 55 illus. in color, online resource)
    ISBN: 9783319578521
    Series Statement: Springer Geology
    URL: https://doi.org/10.1007/978-3-319-57852-1
    URL: https://swbplus.bsz-bw.de/bsz491755546cov.jpg
    DOI: 10.1007/978-3-319-57852-1
    Language: English
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  • 8
    Article
    Article
    Vulkaninseln als ozeanische Geosysteme (1997)
    Associated volumes
    Details Availability
    In: Geowissenschaften, Berlin : Ernst & Sohn, 1988, 15(1997), 9, Seite 301-305, 0933-0704
    In: volume:15
    In: year:1997
    In: number:9
    In: pages:301-305
    Type of Medium: Article
    Pages: Ill., Kt.
    ISSN: 0933-0704
    Language: German
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  • 9
    Online Resource
    Online Resource
    Pockmarks in the Northern Congo Fan area, SW Africa: Complex seafloor features shaped by fluid flow (2008)
    Associated volumes
    Details Availability
    In: Marine geology, Amsterdam [u.a.] : Elsevier Science, 1964, 249(2008), 3/4, Seite 206-225, 1872-6151
    In: volume:249
    In: year:2008
    In: number:3/4
    In: pages:206-225
    Description / Table of Contents: Three pockmarks named "Hydrate Hole", "Black Hole", and"Worm Hole" were studied in the northern Congo Fan area at water depths around 3100 m. The cross-disciplinary investigations include seafloor observations by TV-sled, sampling by TV-guided grab and multicorer as well as gravity coring, in addition to hydroacoustic mapping by a swath system, a parametric sediment echosounder and a deep-towed sidescan sonar. The pockmarks are morphologically complex features consisting of one or more up to 1000 m wide and 10-15 m deep depressions revealed by swath-mapping. High reflection amplitudes in the sediment echosounder records indicate the presence of a 2530 m thick shallow sediment section with gas hydrates, which have been recovered by gravity corer. Hydrates, chemosynthetic communities, and authigenic carbonates clearly indicate fluid flow from depths, which we propose to be mainly in the form of ascending gas bubbles rather than advection of methane-rich porewater. Evidence for seepage at the seafloor is confined to small areas within the seafloor depressions and was revealed by characteristic backscatter facies. Small meter-scale sized depressions signified as pitsʺ exist in or close to the pockmarks but seafloor observations did not reveal evidence for the presence of typical seep organisms or authigenic carbonates. Areas of intermediate backscatter were inhabited by vesicomyid clams in soft sediments. High backscatter was associated with vestimentiferan tubeworms (Siboglinidae) and authigenic carbonates. We discuss the three different environments "pits","vesicomyid clams", "vestimentifera/carbonate" in the light of differences in the geochemical setting. Pits are probably formed by escaping gas bubbles but seepage is too transient to sustain chemosynthetic life. Vesicomyid clams are present in sediments with gas hydrate deposits. However, the hydrates occur several meters below the surface indicating a lower flux compared to the vestimentifera/carbonate environment. In the latter environment, accumulated carbonates and clam shells indicate that fine grained particles have been eroded away. Gas hydrates were found in this environment at depths below about 50 cm suggesting the highest supply with methane compared to the other environments.
    Type of Medium: Online Resource
    ISSN: 1872-6151
    DOI: 10.1016/j.margeo.2007.11.010
    Language: English
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  • 10
    Online Resource
    Online Resource
    Three-dimensional seismic investigations of the Sevastopol mud volcano in correlation to gas/fluid migration pathways and indications for gas hydrate occurrences in the Sorokin Trough (Black Sea) (2008)
    Associated volumes
    Details Availability
    In: Geochemistry, geophysics, geosystems, Hoboken, NJ : Wiley, 2000, 9(2008), 5, 1525-2027
    In: volume:9
    In: year:2008
    In: number:5
    In: extent:22
    Description / Table of Contents: New 3-D seismic investigations carried out across the Sevastopol mud volcano in the Sorokin Trough present 3-D seismic data of a mud volcano in the Black Sea for the first time. The studies allow us to image the complex three-dimensional morphology of a collapse structured mud volcano and to propose an evolution model. The Sevastopol mud volcano is located above a buried diapiric structure with two ridges and controlled by fluid migration along a deep fault system, which developed during the growth of the diapirs in a compressional tectonic system. Overpressured fluids initiated an explosive eruption generating the collapse depression of the Sevastopol mud volcano. Several cones were formed within the depression by subsequent quiet mud extrusions. Although gas hydrates have been recovered at various mud volcanoes in the Sorokin Trough, no gas hydrates were sampled at the Sevastopol mud volcano. A BSR (bottom-simulating reflector) is missing in the seismic data; however, high-amplitude reflections (bright spots) observed above the diapiric ridge near the mud volcano at a relatively constant depth correspond to the approximate depth of the base of the gas hydrate stability zone (BGHSZ). Thus we suggest that gas hydrates are present locally where gas/fluid flow occurs related to mud volcanism, i.e., above the diapir and close to the feeder channel of the mud volcano. Depth variations of the bright spots of up to 200 ms TWT might be caused by temperature variations produced by variable fluid flow.
    Type of Medium: Online Resource
    Pages: 22
    ISSN: 1525-2027
    DOI: 10.1029/2007GC001685
    Language: English
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