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  • 1
    Series available for loan
    Series available for loan
    NanTroSEIZE stage 2 [Elektronische Ressource] : NanTroSEIZE Riser/Riserless Observatory - Expedition 319 of the riser drilling platform from and to Shingu, Japan, Sites C0009-C0011, 5 May - 31 August 2009 (2010)
    Washington, DC : IODP Management Internat. for the IODP
    Associated volumes
    Details Availability
    Call number: 13/ZSP-947(319)
    In: Proceedings of the integrated ocean drilling program [Elektronische Ressource]
    Type of Medium: Series available for loan
    Pages: 1 DVD
    Series Statement: Proceedings of the integrated ocean drilling program : Expedition reports 319
    URL: http://publications.iodp.org/proceedings/319/319title.htm
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Über den 3,7-Dimethyl-5-phenyl-9-oxo-bispidincarbonsäureester-(1) (1961)
    Springer
    Monatshefte für Chemie 92 (1961), S. 310-312 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung DieMannich-Reaktion von γ-Phenylacetessigester mit Methylamin und 2 Mol Formaldehyd führt nicht zum 5-Phenyl-3-carbalkoxyl-N-methylpiperidon(II), sondern ohne bisher isolierbare Zwischenstufen zum Aufbau des bicyclischen Bispidinderivates (I); dabei treten 2 weitere Mol Formaldehyd und 1 Mol Methylamin in Reaktion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01153886
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  • 3
    Electronic Resource
    Electronic Resource
    Über zwei Δ-isomere N-Methyl-5-phenyl-piperidein-carbonsäureester-(3) (1961)
    Springer
    Monatshefte für Chemie 92 (1961), S. 313-321 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Ausgehend vom Atropasäureäthylester (III) wurde die Darstellung eines N-Methyl-5-phenyl-piperidein-carbonsäureesters-(3) (II) in einem 5-Stufen-Synthesegang angestrebt. Das über die ersten 4 Stufen in guter Ausbeute erhältliche Isomerengemisch der Benzoate (VI) wurde einer alkalisch katalysierten Benzoesäureabspaltung unterworfen, aus welcher in geringer Ausbeute zwei Δ-isomere N-Methyl-5-phenyl-tetrahydronicotinsäureester isoliert wurden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01153887
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  • 4
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    A pressure vessel for true-triaxial deformation and fluid flow during frictional shear (2007)
    Details
    Publication Date: 2017-04-04
    Description: see Abstract Volume
    Description: Istituto Nazionale di Geofisica e Vulcanologia, Italy (INGV) Centre National de la Recherche Scientifique (CNRS) ExxonMobil Upstream Research Company
    Description: Unpublished
    Description: Erice, Italy
    Description: open
    Keywords: rock physics, geomechanics, thermo-hydro-mechanical coupling, natural hazards ; 04. Solid Earth::04.04. Geology::04.04.06. Rheology, friction, and structure of fault zones
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Oral presentation
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  • 5
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    Stability of Clay-rich Fault Gouge at Intermediate to High Shear Strain (2007)
    Details
    Publication Date: 2017-04-04
    Description: see Abstract Volume
    Description: Istituto Nazionale di Geofisica e Vulcanologia, Italy (INGV) Centre National de la Recherche Scientifique (CNRS) ExxonMobil Upstream Research Company
    Description: Unpublished
    Description: Erice, Italy
    Description: open
    Keywords: rock physics, geomechanics, thermo-hydro-mechanical coupling, natural hazards ; 04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
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  • 6
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    Fluid budgets along the northern Hikurangi subduction margin, New Zealand: the effect of a subducting seamount on fluid pressure (2015)
    Oxford University Press
    Details
    Publication Date: 2015-05-01
    Description: We estimate fluid sources around a subducted seamount along the northern Hikurangi subduction margin of New Zealand, using thermomechanical numerical modelling informed by wedge structure and porosities from multichannel seismic data. Calculated fluid sources are input into an independent fluid-flow model to explore the key controls on overpressure generation to depths of 12 km. In the thermomechanical models, sediment transport through and beneath the wedge is calculated assuming a pressure-sensitive frictional rheology. The change in porosity, pressure and temperature with calculated rock advection is used to compute fluid release from compaction and dehydration. Our calculations yield more precise information about source locations in time and space than previous averaged estimates for the Hikurangi margin. The volume of fluid release in the wedge is smaller than previously estimated from margin-averaged calculations (~14 m 3  yr –1  m –1 ), and is exceeded by fluid release from underlying (subducting) sediment (~16 m 3  yr –1  m –1 ). Clay dehydration contributes only a small quantity of fluid by volume (~2 m 3  yr –1  m –1 from subducted sediment), but the integrated effect is still significant landward of the seamount. Fluid source terms are used to estimate fluid pressures around a subducting seamount in the fluid-flow models, using subducted sediment permeability derived from porosity, and testing two end-members for décollement permeability. Models in which the décollement acts as a fluid conduit predict only moderate fluid overpressure in the wedge and subducting sediment. However, if the subduction interface becomes impermeable with depth, significant fluid overpressure develops in subducting sediment landward of the seamount. The location of predicted fluid overpressure and associated dehydration reactions is consistent with the idea that short duration, shallow, slow slip events (SSEs) landward of the seamount are caused by anomalous fluid pressures; alternatively, it may result from frictional effects of changing clay content along the subduction interface.
    Keywords: Geodynamics and Tectonics
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 7
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    Experimental evidence linking slip instability with seafloor lithology and topography at the Costa Rica convergent margin (2013)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2013-07-23
    Description: Seismicity patterns offshore Costa Rica (Central America) at the Middle America Trench have led to speculation that large (moment magnitude, M w ~7.0) earthquakes are associated with subducting topographic highs. In areas of high basement topography, a regionally extensive nannofossil chalk unit is exposed at the seafloor on the incoming plate, whereas in regions of low basement topography, hemipelagic clay-rich sediment is exposed. Because the entire sediment section is subducted at this margin, lithologic variation in the uppermost subducting sediments may control plate boundary fault behavior. Our laboratory experiments reveal that the chalk is frictionally strong (µ = 0.71–0.88) and characterized by velocity-weakening and stick-slip behavior, notably at elevated temperature. In contrast, the hemipelagic sediment is weak (µ = 0.22–0.35) and in many cases velocity strengthening. We suggest that the presence of frictionally unstable carbonates at bathymetric highs may play a key, previously unrecognized, role in governing earthquake nucleation.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 8
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    Frictional properties and sliding stability of the San Andreas fault from deep drill core (2012)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2012-08-01
    Description: The strength of tectonic faults and the processes that control earthquake rupture remain central questions in fault mechanics and earthquake science. We report on the frictional strength and constitutive properties of intact samples across the main creeping strand of the San Andreas fault (SAF; California, United States) recovered by deep drilling. We find that the fault is extremely weak (friction coefficient, μ = ~ 0.10), and exhibits both velocity strengthening frictional behavior and anomalously low rates of frictional healing, consistent with aseismic creep. In contrast, wall rock to the northeast shows velocity weakening frictional behavior and positive healing rates, consistent with observed repeating earthquakes on nearby fault strands. We also document a sharp increase in strength to values of μ 〉 ~0.40 over 〈1 m distance at the boundary between the fault and adjacent wall rock. The friction values for the SAF are sufficiently low to explain its apparent weakness as inferred from heat flow and stress orientation data. Our results may also indicate that the shear strength of the SAF should remain approximately constant at ~10 MPa in the upper 5–8 km, rather than increasing linearly with depth, as is commonly assumed. Taken together, our data explain why the main strand of the SAF in central California is weak, extremely localized, and exhibits aseismic creep, while nearby fault strands host repeating earthquakes.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 9
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    Recurring and triggered slow-slip events near the trench at the Nankai Trough subduction megathrust (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-06-16
    Description: The discovery of slow earthquakes has revolutionized the field of earthquake seismology. Defining the locations of these events and the conditions that favor their occurrence provides important insights into the slip behavior of tectonic faults. We report on a family of recurring slow-slip events (SSEs) on the plate interface immediately seaward of repeated historical moment magnitude ( M w ) 8 earthquake rupture areas offshore of Japan. The SSEs continue for days to several weeks, include both spontaneous and triggered slip, recur every 8 to 15 months, and are accompanied by swarms of low-frequency tremors. We can explain the SSEs with 1 to 4 centimeters of slip along the megathrust, centered 25 to 35 kilometers (km) from the trench (4 to 10 km depth). The SSEs accommodate 30 to 55% of the plate motion, indicating frequent release of accumulated strain near the trench.
    Keywords: Geochemistry, Geophysics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    Mechanics of Fold-and-Thrust Belts Based on Geomechanical Modeling (2018)
    American Geophysical Union
    Details
    Publication Date: 2018-05-01
    Description: We use a large strain geomechanical model and critical state soil mechanics to study the evolution of stress and deformation in an evolving fold-and-thrust belt and its underlying footwall sediments. Both mean effective stress and deviatoric stress contribute to porosity loss within the wedge with 35% of the porosity loss resulting from increased shear. As a result, porosity increases abruptly across the décollement because both mean-effective and shear stresses are much higher inside the wedge than in the footwall. As the basal friction coefficient (μb) increases, more shear stress is transmitted across the décollement, resulting in additional compaction of the footwall sediment and decrease in the porosity contrast across the décollement. As the internal friction coefficient (μs) increases, the wedge sediment is more compacted because it can withstand higher mean-effective and deviatoric stresses. Inside the wedge, the sediment experiences subhorizontal shortening strain and subvertical elongation strain. We predict a 10–30 km wide “transition zone” in which the shear-stress ratios and compaction curves change rapidly between compressional critical state failure and uniaxial strain (K0) state. Our model results agree with the taper angles and the stress orientations predicted by critical taper theory. This large-strain drained modeling approach provides first-order insights into the mechanical processes of loading and compaction in fold-and-thrust belts and a foundation for understanding field observations of pressure, stress, and deformation in thrust belt systems. ©2018. American Geophysical Union. All Rights Reserved.
    Print ISSN: 2169-9313
    Electronic ISSN: 2169-9356
    Topics: Geosciences , Physics
    Published by American Geophysical Union
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