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  • 1
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    Structural evolution of Dronning Maud Land (East Antarctica) and significance for links with the East African and Kuunga orogens, Abstracts Gondwana 14, p. 93 (2011)
    In:  EPIC3Reuniting Gondwana: East meets West, Buzios-Brasil, 2011-09-25-2011-09-30
    Details
    Publikationsdatum: 2017-10-17
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Conference , notRev
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  • 2
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    Reassessing Eastern Mediterranean tectonics and earthquake hazard from the AD 365 earthquake (2021)
    In:  AGU Advances
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    Publikationsdatum: 2021-06-21
    Beschreibung: The hallmark of great earthquakes in the Mediterranean is the 21 July 365 CE earthquake and tsunami that destroyed cities and killed thousands of people throughout the Eastern Mediterranean. This event is intriguing because most Mediterranean subduction forearcs exhibit pervasive crustal extension and minimal definitive evidence exists for great subduction megathrust earthquakes, consistent with weak seismic coupling. This conundrum has led many to favor rupture of a previously unrecognized upper plate splay fault south of Crete in an M w 8.3–8.5 earthquake, uplifting a Cretan Holocene paleoshoreline by up to 9 m. Similar source mechanisms have been adapted for the region, which are commonly used for seismic and tsunami hazard estimation. We present an alternative model for Holocene paleoshoreline uplift and the 365 CE tsunami that centers on known active normal fault systems offshore of western and southwestern Crete. We use new and published radiocarbon dates and historical records to show that uplift of the Cretan paleoshoreline likely occurred during two or more earthquakes within 2–3 centuries. Visco‐elastic dislocation modeling demonstrates that the rupture of these normal faults fits observed data as well as reverse fault models but requires reduced slip and lower cumulative earthquake energy release (∼M w 7.9). Tsunami modeling shows that normal‐fault ruptures produce strong tsunamis that better match historical reports than a hypothetical reverse fault. Our findings collectively favor the interpretation that damaging earthquakes and tsunamis in the Eastern Mediterranean can originate on normal faults, highlighting the potential hazard from tsunamigenic upper plate normal fault earthquakes.
    Materialart: info:eu-repo/semantics/article
    Format: application/pdf
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  • 3
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    The Dynamics of Forearc – Back‐Arc Basin Subsidence: Numerical Models and Observations From Mediterranean Subduction Zones (2022)
    In:  Tectonics
    Details
    Publikationsdatum: 2022-05-23
    Beschreibung: The subsidence history of forearc and back-arc basins reflects the relationship between subduction kinematics, mantle dynamics, magmatism, crustal tectonics, and surface processes. The distinct contributions of these processes to the topography variations of active margins during subduction initiation, oceanic subduction, and collision are less understood. We ran 2D elasto-visco-plastic numerical models including surface and hydration processes. The models show the evolution of wedge-top and retro-forearc basins on the continental overriding plate, separated by a forearc high. They are affected by repeated compression and extension phases. Compression-induced subsidence is recorded in the syncline structure of the retro-forearc basin from the onset of subduction. The 2–4 km upper plate negative residual topography is produced by the gradually steepening slab, which drags down the upper plate. Trench retreat leads to slab unbending and decreasing slab dip angle that leads to upper plate trench-ward tilting. Back-arc basins are either formed along inherited weak zones at a large distance from the arc or are created above the hydrated mantle wedge originating from arc rifting. Back-arc subsidence is primarily governed by crustal thinning that is controlled by slab roll-back and supported by the underlying mantle convection. High subduction and mantle convection velocities result in large wavelength negative dynamic topography. Collision and continental subduction are linked to the uplift of the forearc basins; however, the back-arc records ongoing extension during a soft collision. During the hard collision, both the forearc and back-arc basins are ultimately affected by the compression. Our modeling results provide insights into the evolution of Mediterranean subduction zones.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/article
    Format: application/pdf
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  • 4
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    Oblique subduction and mantle flow control on upper plate deformation: 3D geodynamic modeling (2021)
    In:  Earth and Planetary Science Letters
    Details
    Publikationsdatum: 2021-11-15
    Beschreibung: Most subduction zones on Earth are oblique, i.e., the angle between the plate convergence vector and the trench notably differs from 90°. Therefore, modeling and understanding the strain partitioning in the forearc, the development of extensional basins in the back-arc region and the diachronous transition from subduction to collision require a 3D approach. Here, we assess how oblique oceanic subduction and subsequent collision and associated mantle flow around the subducted lithosphere control the thermo-mechanical evolution of active margins. We conducted a series of 3D thermo-mechanical subduction models and discuss the influence of different subduction obliquity angles, the role of mantle flow variations and their connection with sediment transport and back-arc deformation. Numerical models are complemented by scaled analogue models to visualize the mantle flow evolution. Oceanic subduction along an oblique trench results in asymmetric mantle return flow leading to the gradual decrease of the subduction obliquity angle driven by the gradual rotation of the lower plate and the along-trench variation of slab retreat. This creates laterally variable subduction velocities and slab geometries. Back-arc extension is governed by both the toroidal mantle flow along the slab edges and by the oblique subduction induced lateral mantle flow gradient. The diachronous transition from oceanic to continental subduction and collision facilitates the laterally variable trench advance and retreat and back-arc deformation. Tectonically induced lateral sediment transport in the trench and along the subduction interface decreases its strength and viscosity and can alter subduction velocities. Our model results provide critical insights into the evolution of oblique subduction and collisional systems, such as the Arabia-Eurasia convergence zone.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/article
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  • 5
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    Subduction initiation by thermal-chemical plumes: Numerical studies (2008)
    In:  Physics of the Earth and Planetary Interiors
    Details
    Publikationsdatum: 2020-02-12
    Schlagwort(e): 550 - Earth sciences
    Materialart: info:eu-repo/semantics/article
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  • 6
    Digitale Medien
    Digitale Medien
    Creeping phenomena of amphiphiles from a water surface onto a solid surface studied by a touching method (1989)
    s.l. : American Chemical Society
    Langmuir 5 (1989), S. 1326-1331 
    Details
    ISSN: 1520-5827
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/la00090a009
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  • 7
    Digitale Medien
    Digitale Medien
    Artificial non-peptide single ion channels (1992)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 114 (1992), S. 7618-7622 
    Details
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ja00046a002
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  • 8
    Digitale Medien
    Digitale Medien
    Notes. The Triterpenes of Befaria racemosa (Vent.) (1961)
    s.l. : American Chemical Society
    The @journal of organic chemistry 26 (1961), S. 271-272 
    Details
    ISSN: 1520-6904
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/jo01060a623
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  • 9
    Digitale Medien
    Digitale Medien
    Defect Observation in Silicon Surface Layers by Surface Wave Resonance in RHEED (1993)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 117-118 (Jan. 1993), p. 273-278 
    Details
    ISSN: 1662-9752
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/59/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.117-118.273.pdf
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  • 10
    Digitale Medien
    Digitale Medien
    Protein Kinase C-Independent Correlation Between P-Glycoprotein Expression and Volume Sensitivity of Cl− Channel (1997)
    Springer
    The journal of membrane biology 157 (1997), S. 63 -69 
    Details
    ISSN: 1432-1424
    Schlagwort(e): Key words: Cl− channel — P-glycoprotein — RVD — PKC — Human epidermoid cell
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract. The possible correlation between P-glycoprotein (PGP) and volume-sensitive Cl− channel was examined in a pair of cell lines: a subline of the human epidermoid KB cell (KB-3-1) and the corresponding MDR1-transfected cell line (KB-G2). Western blot analysis and indirect immunofluorescence studies indicated that KB-G2, but not KB-3-1, exhibits the PGP expression. Patch-clamp whole-cell recordings showed that osmotic swelling activates Cl− currents not only in PGP-expressing but also in PGP-lacking cells. The amplitude of the maximal current was indistinguishable between both cells. Activation of protein kinase C (PKC) or loading with a PKC inhibitor failed to affect the swelling-induced activation of the Cl− currents in both cells. The relation between whole-cell Cl− currents and cell size measured simultaneously showed that volume sensitivity of the Cl− channel was augmented by the PGP expression irrespective of the activity of PKC on the plasma membrane. A similar increase in volume sensitivity of the Cl− channel was also induced by the expression of the ATP hydrolysis-deficient PGP mutant, K433M. We conclude that P-glycoprotein does not represent the volume-sensitive Cl− channel but that its expression modulates volume sensitivity of the Cl− channel in a manner independent of its ATPase activity or of the protein kinase C activity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002329900216
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