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  • 1
    Keywords: Forschungsbericht ; Erdgasgewinnung ; Offshore-Technik ; Gashydrate ; Methan
    Type of Medium: Online Resource
    Pages: Online-Ressource (41 S., 2,65 MB) , Ill., graph. Darst
    Language: German
    Note: Förderkennzeichen BMBF 03G0566C. - Verbund-Nr. 01018264 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Auch als gedr. Ausg. vorh , Systemvoraussetzungen: Acrobat reader. , Bericht in dt. Sprache
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  • 2
    Online Resource
    Online Resource
    Cambridge :Cambridge University Press,
    Keywords: Faults (Geology). ; Glaciers. ; Electronic books.
    Description / Table of Contents: An overview of glacially triggered faulting, summarising state-of-the-art research and theory, geological, geophysical, geodetic and geomorphological investigation methods and modelling. Written by international experts, it catalogues confirmed and proposed glacially induced faults, creating a reference for geoscientists working in the field.
    Type of Medium: Online Resource
    Pages: 1 online resource (494 pages)
    Edition: 1st ed.
    ISBN: 9781108801881
    DDC: 551.872
    Language: English
    Note: Cover -- Half-title -- Title page -- Copyright information -- Contents -- List of Figures -- List of Tables -- List of Contributors -- Preface -- Part I Introduction -- 1 Glacially Triggered Faulting: A Historical Overview and Recent Developments -- Abstract -- 1.1 Introduction -- 1.2 Classification Criteria for a Glacially Induced Fault -- 1.3 Brief Historical Overview until the Early 2000s -- 1.3.1 History in Lapland -- 1.3.2 History Outside of Lapland -- 1.4 Recent Developments -- 1.5 Conclusions -- Acknowledgements -- References -- 2 Geomechanics of Glacially Triggered Faulting -- Abstract -- 2.1 Introduction -- 2.2 Glacially Induced Stresses -- 2.3 Stability of Optimally Orientated Faults in a Thrust-Faulting Stress Regime -- 2.4 Stability of Optimally Orientated Faults in a Normal-Faulting Stress Regime -- 2.5 Stability of Optimally Orientated Faults in a Strike-Slip-Faulting Stress Regime -- 2.6 Other Factors Affecting Fault Stability -- 2.7 Conclusion -- Acknowledgements -- References -- Part II Methods and Techniques for Fault Identification and Dating -- 3 Earthquake-Induced Landforms in the Context of Ice-Sheet Loading and Unloading -- Abstract -- 3.1 Introduction -- 3.2 The Timing and Preservation of Earthquake-Induced Landforms -- 3.3 Classification of Earthquake-Induced Landforms in the Context of Ice-Sheet Loading and Unloading -- 3.4 Examples of Earthquake-Induced Landforms -- 3.4.1 Primary Landforms Created by Tectonic Deformation -- 3.4.1.1 Fault Scarps -- 3.4.1.2 Other Primary Landforms -- Subsided Areas -- Folds Over Faults and Other Uplifted Areas -- 3.4.2 Secondary Landforms Created by Seismic Shaking -- 3.4.2.1 Landslides -- 3.4.2.2 Liquefaction Spreads -- 3.4.2.3 Subglacial Landforms -- Pulju Moraine -- Mass Flow Deposits -- Ráhppát Landforms -- Esker Collapses -- Squeeze-Up Moraines -- 3.4.2.4 Liquefaction Features. , Liquefaction Craters -- Liquefaction Bowls -- 3.4.3 Stream Deflections and Changes in Drainage Patterns -- 3.5 Discussion -- 3.6 Perspectives -- Acknowledgements -- References -- 4 The Challenge to Distinguish Soft-Sediment Deformation Structures (SSDS) Formed by Glaciotectonic, Periglacial and Seismic Processes in a Formerly Glaciated Area: A Review and Synthesis -- Abstract -- 4.1 Introduction -- 4.2 Formation Processes of SSDS -- 4.2.1 Liquefaction -- 4.2.2 Fluidization -- 4.3 Common Trigger Processes and Timing of SSDS Formation -- 4.3.1 Earthquakes -- 4.3.2 Depositional Loading -- 4.3.3 Gravity-Driven Sediment Failure -- 4.3.4 Glaciotectonic Deformation -- 4.3.4.1 Subglacial Deformation -- 4.3.4.2 Proglacial Deformation -- Iceberg Scours, Iceberg Gravity Craters and Kettle Holes -- 4.3.5 Periglacial Processes -- 4.3.5.1 Ice Wedges and Ice-Wedge Casts -- 4.3.5.2 Periglacial Involutions and Craters -- 4.4 Limitation of SSDS to Identify Palaeoearthquakes -- 4.5 Deformation Bands as Indicators for Neotectonic Fault Activity -- 4.6 Conclusions -- Acknowledgements -- References -- 5 Glacially Induced Fault Identification with LiDAR, Based on Examples from Finland -- Abstract -- 5.1 Introduction -- 5.2 Mapping Postglacial Faults -- 5.3 Geometrical Analysis of Fault Scarps and Landslides -- 5.4 Conclusions -- References -- 6 Fault Identification from Seismology -- Abstract -- 6.1 Introduction -- 6.2 Measurements and Analysis of Seismic Events -- 6.2.1 Ground Motion Measurement and Instrumentation -- 6.2.2 Seismogram Analysis -- 6.2.3 Seismic Networks -- 6.2.4 Signal Processing -- 6.3 Hypocentre Determination -- 6.4 From Hypocentre Location to Fault Location and Orientation -- 6.5 Styles of Faulting -- 6.6 Determination of the Earthquake Focal Mechanism and Moment Tensor -- 6.7 Conclusions -- Acknowledgements -- References. , 7 Imaging and Characterization of Glacially Induced Faults Using Applied Geophysics -- Abstract -- 7.1 Introduction -- 7.2 Geophysical Methods -- 7.2.1 Seismic Methods -- 7.2.2 Ground-Penetrating Radar -- 7.2.3 Geoelectrics -- 7.2.4 Electromagnetic Methods -- 7.2.5 Magnetics -- 7.2.6 Gravity -- 7.3 Case Studies -- 7.3.1 Near-Surface Studies: Lansjärv, Stuoragurra and Bollnäs -- 7.3.2 Deeper Studies: Pärvie, Burträsk, Suasselkä -- 7.4 Discussion -- 7.5 Conclusions -- References -- 8 Dating of Postglacial Faults in Fennoscandia -- Abstract -- 8.1 Introduction -- 8.2 Geomorphic Dating -- 8.2.1 Geomorphic Dating with Glacial Landforms -- 8.2.2 Geomorphic Dating with Palaeoshorelines -- 8.2.3 Advantages, Disadvantages and Recent Revelations of Geomorphic Dating -- 8.3 Stratigraphic Dating -- 8.3.1 Stratigraphic Dating above the Highest Postglacial Shoreline -- 8.3.2 Stratigraphic Dating below the Highest Postglacial Shoreline -- 8.3.3 Advantages, Disadvantages and Recent Revelations of Stratigraphic Dating -- 8.4 Indirect Dating -- 8.4.1 Advantages, Disadvantages and Recent Revelations of Indirect Dating -- 8.5 Direct Dating -- 8.5.1 Surface Exposure Dating -- 8.6 Discussion and Conclusions -- References -- 9 Proposed Drilling into Postglacial Faults: The Pärvie Fault System -- Abstract -- 9.1 Introduction -- 9.2 Background -- 9.2.1 Geological Setting -- 9.2.2 Geophysical Observations -- 9.2.3 Age and Scale of Postglacial Faulting -- 9.2.4 Deep Biosphere -- 9.3 Motivation for Drilling -- 9.4 Strategies to Address the Objectives -- 9.4.1 Drilling and Coring Operations -- 9.4.2 Logging and Borehole Testing -- 9.4.3 Borehole Observatories -- 9.4.4 Target Drilling Depths and Fault Zone Identification -- 9.5 Concluding Remarks -- Acknowledgements -- References -- Part III Glacially Triggered Faulting in the Fennoscandian Shield. , 10 Seismicity and Sources of Stress in Fennoscandia -- Abstract -- 10.1 Introduction and Geological Setting -- 10.2 Present-Day Seismicity -- 10.3 The Regional Stress Direction in Fennoscandia -- 10.4 Discussion on Earthquake Causes -- 10.5 Summary -- References -- 11 Postglacial Faulting in Norway: Large Magnitude Earthquakes of the Late Holocene Age -- Abstract -- 11.1 Introduction -- 11.2 Geological and Geophysical Setting -- 11.3 Methods -- 11.3.1 Electrical Resistivity Tomography (ERT) -- 11.3.2 Reflection Seismic Data Acquisition and Processing -- 11.3.3 Recording and Processing of Seismicity -- 11.4 Results -- 11.4.1 Trenching and Radiocarbon Dating -- 11.4.2 Geophysical Studies -- 11.5 Discussion -- 11.6 Conclusions -- Acknowledgements -- References -- 12 Glacially Induced Faults in Sweden: The Rise and Reassessment of the Single-Rupture Hypothesis -- Abstract -- 12.1 Introduction -- 12.2 Background -- 12.3 Multiple Ruptures of the Same Fault Segments -- 12.3.1 Merasjärvi Fault -- 12.3.2 Lainio Fault -- 12.3.3 Pärvie Fault -- 12.4 Different Ages of Ruptures on Different Segments within the Same Fault System -- 12.4.1 Pärvie Fault -- 12.4.2 Lansjärv Fault -- 12.5 Discussion -- 12.6 Conclusions -- References -- 13 Glacially Induced Faults in Finland -- Abstract -- 13.1 Introduction -- 13.2 Pasmajärvi GIF Complex -- 13.3 Venejärvi-Jauhojärvi GIF Complex -- 13.4 Isovaara-Riikonkumpu GIF Complex -- 13.5 Suasselkä GIF Complex -- 13.6 Vaalajärvi-Ristonmännikkö GIF Complex -- 13.7 Discussion -- 13.8 Conclusion -- References -- 14 Lateglacial and Postglacial Faulting in the Russian Part of the Fennoscandian Shield -- Abstract -- 14.1 Introduction -- 14.2 The Murmansk Seismic Lineament -- 14.3 The Kandalaksha Seismic Lineament -- 14.4 Secondary Lineaments, Late- and Postglacial Faults and Seismic Dislocations -- 14.5 Conclusions -- References. , Part IV Glacially Triggered Faulting at the Edge and in the Periphery of the Fennoscandian Shield -- 15 Lateglacial and Postglacial Faulting in Denmark -- Abstract -- 15.1 Introduction -- 15.2 Stress Pattern -- 15.3 Structure and Historic Earthquakes -- 15.4 Observations of Late- and Postglacial Faulting in the Danish Area -- 15.5 Discussion -- 15.6 Conclusions -- Acknowledgements -- References -- 16 Glacially Induced Faults in Germany -- Abstract -- 16.1 Introduction -- 16.2 Geological Setting -- 16.2.1 Main Geological Structures -- 16.2.2 The Central European Basin System -- 16.2.3 Pleistocene Glaciations -- 16.2.4 The Stress Field -- 16.3 Neotectonic Activity and Seismicity in Northern Germany -- 16.3.1 Palaeoseismological Studies and GIA-Induced Movements -- 16.3.2 Recent Seismicity -- 16.4 Potential GIFs in Northern Germany -- 16.5 Discussion -- 16.5.1 Tectonic Structures and the Distribution of Fault Activity -- 16.6 Conclusions -- Acknowledgements -- References -- 17 Glacially Induced Faulting in Poland -- Abstract -- 17.1 Introduction -- 17.2 Geological Setting of Poland -- 17.3 Traces of Glacial Isostatic Adjustment in Poland -- 17.4 Discussion and Final Remarks -- Acknowledgements -- References -- 18 Soft-Sediment Deformation Structures in the Eastern Baltic Region: Implication in Seismicity and Glacially Triggered Faulting -- Abstract -- 18.1 Introduction -- 18.2 Geological Structure and Tectonics -- 18.3 Seismic Activity -- 18.4 Soft-Sediment Deformation Structures and Their Potential Relation to Glacially Triggered Faulting -- 18.5 Discussion and Final Remarks -- Acknowledgements -- References -- Part V Glacially Triggered Faulting Outside Europe -- 19 The Search for Glacially Induced Faults in Eastern Canada -- Abstract -- 19.1 Introduction -- 19.2 Expected Numbers of Glacially Induced Faults -- 19.3 Probable Glacially Induced Faults. , 19.3.1 Holy Grail Scarp, Manitoba.
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  • 3
    Publication Date: 2023-06-17
    Description: We present new evidence for neotectonic activity along the Harz Boundary Fault, a Cretaceous reverse fault that represents a key structure in northern Germany. For the fault analysis, we use a multimethod approach, integrating outcrop data, luminescene dating, shear wave seismics, electrical resistivity tomography (ERT) and numerical simulations. A recent sinkhole at the SSW-ward dipping and WNW–ESE striking Harz Boundary Fault exposes a NNE-ward dipping and WNW–ESE striking planar fault surface that cuts through unconsolidated debris-flow deposits thus pointing to young Lateglacial tectonic activity. The fault shows a polyphase evolution with initial normal fault movement and a later reactivation as an oblique fault with reverse and strike-slip components. A shear wave seismic profile was acquired to analyse the geometry of the fault and show that the Harz Boundary Fault is steeply dipping and likely has branches. Partly, these branches propagate into overlying alluvial-fan deposits that are probably Pleniglacial to Lateglacial in age. The outcrop data in combination with the seismic data give evidence for a splay fault system with steep back-thrusts. One of these back-thrusts is most likely the NNE-ward dipping fault that is exposed in the sinkhole. The lateral extent of the fault was mapped with electrical resistivity tomography (ERT) profiles. The timing of fault movement was estimated based on optically stimulated luminescence dating of the faulted debris-flow deposits using both quartz and feldspar minerals. Consistent feldspar and quartz ages indicate a good bleaching of the sediment prior to deposition. The results imply fault movements post-dating ~ 15 ka. Numerical simulations of glacio isostatic adjustment (GIA)-related changes in the Coulomb failure stress regime at the Harz Boundary Fault underpin the assumption that the fault was reactivated during the Lateglacial due to stress changes induced by the decay of the Late Pleistocene (Weichselian) Fennoscandian ice sheet.
    Keywords: ddc:551.8 ; Harz Boundary Fault ; Neotectonics ; Northern Germany ; Glacial isostatic adjustment (GIA) ; Electrical resistivity tomography (ERT) ; Shear wave seismics ; Luminescence dating ; Numerical simulations ; Lateglacial
    Language: English
    Type: doc-type:article
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  • 4
    Publication Date: 2022-03-16
    Description: We present a compilation and analysis of ~ 1000 Holocene relative shore-level (RSL)indicators located around the Baltic Sea including relative sea-level data points as well as data points from the Ancylus Lake and the following transitional phase. The spatial distribution covers the Baltic Sea and near-coastal areas fairly well, but some gaps remain mainly in Sweden. RSL data follow the standardized HOLSEA format and, thus, are ready for spatially comprehensive applications in, e.g., glacial isostatic adjustment (GIA) modelling. We apply a SQL database system to store the nationally provided data sets in their individual form and to map the different input into the HOLSEA format as the information content of the individual data sets from the Baltic Sea area differs (https://doi.org/10.5880/GFZ.1.3.2020.003). The majority of the RSL data is related to the last marine stage in Baltic Sea history after 8.5 ka BP (thousand years before present). These samples were grouped according to their dominant RSL tendencies into three clusters: regions with negative, positive and complex (transitional) RSL tendencies. Overall, regions with isostatic uplift driven negative tendencies dominate and show regression in the Baltic Sea basin during the last marine stage. Shifts from positive to negative tendencies in RSL data from transitional regions show a mid-Holocene highstand around 7.5-6.5 ka BP which is consistent with the end of the final melting of the Laurentide Ice Sheet. Comparisons of RSL data with GIA predictions including global ICE-5G and ICE-6G_C ice histories show good fit with RSL data from the regions with negative tendencies, whereas in the transitional areas in the eastern Baltic, predictions for the mid-Holocene clearly overestimate the RSL and fail to recover the the region where a mid-Holocene RSL highstand derived from the proxy reconstructions should appear. These results motivate improvements of ice-sheet and Earth-structure models and show the potential and benefits of the new compilation for future studies.
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 5
    Publication Date: 2024-02-07
    Description: Highlights: • A first standardized and publicly available Holocene relative sea-level database for the Baltic Sea is presented. • The database holds 1099 revised data points with an estimation of vertical and chronological uncertainties. • Negative RSL tendencies prevail over the positive and complex tendencies in the Baltic Sea Basin. • Mid-Holocene RSL highstand occurred around 7.5–6.5 ka BP being consistent with the end of the final melting of the LIS. • The contribution of ice loading in the eastern Baltic Sea Basin is likely overestimated in the ICE-5G and ICE-6G_C models. Abstract: We present a compilation and analysis of 1099 Holocene relative shore-level (RSL) indicators located around the Baltic Sea including 867 relative sea-level data points and 232 data points from the Ancylus Lake and the following transitional phase. The spatial distribution covers the Baltic Sea and near-coastal areas fairly well, but some gaps remain mainly in Sweden. RSL data follow the standardized HOLSEA format and, thus, are ready for spatially comprehensive applications in, e.g., glacial isostatic adjustment (GIA) modelling. We apply a SQL database system to store the nationally provided data sets in their individual form and to map the different input into the HOLSEA format as the information content of the individual data sets from the Baltic Sea area differs. About 80% of the RSL data is related to the last marine stage in Baltic Sea history after 8.5 ka BP (thousand years before present). These samples are grouped according to their dominant RSL tendencies into three clusters: regions with negative, positive and complex (transitional) RSL tendencies. Overall, regions with isostatic uplift driven negative tendencies dominate and show regression in the Baltic Sea basin during the last marine stage. Shifts from positive to negative tendencies in RSL data from transitional regions show a mid-Holocene highstand around 7.5–6.5 ka BP which is consistent with the end of the final melting of the Laurentide Ice Sheet. Comparisons of RSL data with GIA predictions including global ICE-5G and ICE-6G_C ice histories show good fit with RSL data from the regions with negative tendencies, whereas in the transitional areas in the eastern Baltic, predictions for the mid-Holocene clearly overestimate the RSL and fail to recover the mid-Holocene RSL highstand derived from the proxy reconstructions. These results motivate improvements of ice-sheet and Earth-structure models and show the potential and benefits of the new compilation for future studies.
    Type: Article , PeerReviewed
    Format: text
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  • 6
    Publication Date: 2015-01-29
    Description: Background: In pediatric Hodgkin’s lymphoma (pHL) early response-to-therapy prediction is metabolically assessed by (18)F-FDG PET carrying an excellent negative predictive value (NPV) but an impaired positive predictive value (PPV). Aim of this study was to improve the PPV while keeping the optimal NPV. A comparison of different PET data analyses was performed applying individualized standardized uptake values (SUV), PET-derived metabolic tumor volume (MTV) and the product of both parameters, termed total lesion glycolysis (TLG); Methods: One-hundred-eight PET datasets (PET1, n = 54; PET2, n = 54) of 54 children were analysed by visual and semi-quantitative means. SUVmax, SUVmean, MTV and TLG were obtained the results of both PETs and the relative change from PET1 to PET2 (Δ in %) were compared for their capability of identifying responders and non-responders using receiver operating characteristics (ROC)-curves. In consideration of individual variations in noise and contrasts levels all parameters were additionally obtained after threshold correction to lean body mass and background; Results: All semi-quantitative SUV estimates obtained at PET2 were significantly superior to the visual PET2 analysis. However, ΔSUVmax revealed the best results (area under the curve, 0.92; p 〈 0.001; sensitivity 100%; specificity 85.4%; PPV 46.2%; NPV 100%; accuracy, 87.0%) but was not significantly superior to SUVmax-estimation at PET2 and ΔTLGmax. Likewise, the lean body mass and background individualization of the datasets did not impove the results of the ROC analyses; Conclusions: Sophisticated semi-quantitative PET measures in early response assessment of pHL patients do not perform significantly better than the previously proposed ΔSUVmax. All analytical strategies failed to improve the impaired PPV to a clinically acceptable level while preserving the excellent NPV.
    Electronic ISSN: 2072-6694
    Topics: Medicine
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  • 7
    Publication Date: 2015-11-02
    Description: Key Points Differences between glacially induced fault models shown Glacially induced fault models have to include the entire mantle for ice sheets 〉 100 km Importance of stress migration from the mantle to the lithosphere described
    Print ISSN: 0278-7407
    Electronic ISSN: 1944-9194
    Topics: Geosciences
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  • 8
    Publication Date: 2011-10-29
    Description: The Tien Shan in Central Asia is the largest intracontinental mountain range in the world, but it is 1500 km away from the collision zone between the Indian and Eurasian plates. This region has been and still is the focus of numerous geoscientific studies, mainly because of its evolutionary history and its unique position in the Eurasian lithosphere plate. So far, mainly seismological data have been used to explore the origin of and ongoing seismic activity in this region, but only one study has investigated terrestrial gravity data. In this study, a new gravity data set, EGM2008, is used to determine the crust-mantle boundary (Mohorovičić discontinuity, Moho) of the Tien Shan using inversion of gravity data. In addition, an isostatic Moho is calculated from topographic data, which by comparison to the results of the gravity inversion illuminates the effects of isostatic compensation. The results of the gravity inversion generally agree with results of previous seismic studies and indicate that the Tien Shan has a mountain root with a thickness of about 75 km. Furthermore, the Moho is shallow under the basins, e.g., in the Tarim and Ili basins. The comparison with the isostatic Moho indicates an over-compensation of the orogen and an under-compensation of the basins. The over-compensation results from the former subduction of the Tarim Basin terrane in the south. The under-compensation of the Tarim Basin is generated by support of the terrane between the Tien Shan in the north and the Pamir mountains, Tibet and Himalayas in the south.
    Print ISSN: 0278-7407
    Electronic ISSN: 1944-9194
    Topics: Geosciences
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  • 9
    Publication Date: 2014-07-18
    Description: The growing and melting of continental ice sheets during a glacial cycle is accompanied by stress changes and reactivation of faults. To better understand the relationship between stress changes, fault activation time, fault parameters and fault slip magnitude, a new physics-based two-dimensional numerical model is used. In this study, tectonic background stress magnitudes and fault parameters are tested as well as the angle of the fault and the fault locations relative to the ice sheet. Our results show that fault slip magnitude for all faults is mainly affected by the coefficient of friction within the crust and along the fault, but also by the depth of the fault tip and angle of the fault. Within a compressional stress regime, we find that steeply dipping faults (~75°) can be activated after glacial unloading, and fault activity continues thereafter. Furthermore, our results indicate that low-angle faults (dipping at 30°) may slip up to 63 m, equivalent to an earthquake with a minimum moment magnitude of 7.0. Finally, our results imply that the crust beneath formerly glaciated regions was close to a critically stressed state, in order to enable activation of faults by small changes in stress during a glacial cycle.
    Print ISSN: 0278-7407
    Electronic ISSN: 1944-9194
    Topics: Geosciences
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  • 10
    Publication Date: 2016-03-04
    Description: The standardized uptake value (SUV) is the nearly exclusive means for quantitative evaluation of clinical [18F-]fluorodeoxyglucose (18F-FDG) positron emission tomography (PET) whole body investigations. Howeve...
    Electronic ISSN: 2191-219X
    Topics: Medicine
    Published by SpringerOpen
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