@article{GhaniZeilingerSobeletal.2018, author = {Ghani, Humaad and Zeilinger, Gerold and Sobel, Edward and Heidarzadeh, Ghasem}, title = {Structural variation within the Himalayan fold and thrust belt}, series = {Journal of structural geology}, volume = {116}, journal = {Journal of structural geology}, publisher = {Elsevier Science Publishers Ltd.}, address = {Oxford}, issn = {0191-8141}, doi = {10.1016/j.jsg.2018.07.022}, pages = {34 -- 46}, year = {2018}, abstract = {The Kohat and Potwar fold thrust belts (KP-FTB) in Pakistan exhibit structural variations over 250 km along strike within the Himalayan fold and thrust system. Our 3D deformation model shows that Kohat surface structures evolved above an active roof thrust in Eocene evaporites. The ramp-forming duplexes in the Kohat were stacked and passively transported toward the foreland above new ramps, resulting in up to 5 km of thickening between the two decollements. Ramps from the Kohat extend into the Potwar as thrust tips of fault propagation folds. The basement slope changes from flat (beta < 1 degrees) below the northern part to north-dipping (beta > 1 degrees) below the southern part, corresponding to the change in structural style and complexity of the KP-FTB. The Kalabagh Fault Zone, linking the two belts, is interpreted as a zone of complex dextral strike-slip rotational faulting. Salt expulsed from the hanging walls of normal faults and under synclines in the Kalabagh Fault Zone moved toward the footwall of normal faults, accumulated in the cores of anticlines, and formed lobe structures at the deformation front. The fundamental reasons for the variable structural styles are changes in decollement strength, basement slope, preexisting normal faulting, presence of a secondary decollement and spatially-variable salt mobility and accumulation.}, language = {en} } @misc{MarrucciZeilingerRibolinietal.2018, author = {Marrucci, Monica and Zeilinger, Gerold and Ribolini, Adriano and Schwanghart, Wolfgang}, title = {Origin of knickpoints in an alpine context subject to different perturbing factors, Stura Valley, Maritime Alps (North-Western Italy)}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {1070}, issn = {1866-8372}, doi = {10.25932/publishup-47264}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-472642}, pages = {22}, year = {2018}, abstract = {Natural catchments are likely to show the existence of knickpoints in their river networks. The origin and genesis of the knickpoints can be manifold, considering that the present morphology is the result of the interactions of different factors such as tectonic movements, quaternary glaciations, river captures, variable lithology, and base-level changes. We analyzed the longitudinal profiles of the river channels in the Stura di Demonte Valley (Maritime Alps) to identify the knickpoints of such an alpine setting and to characterize their origins. The distribution and the geometry of stream profiles were used to identify the possible causes of the changes in stream gradients and to define zones with genetically linked knickpoints. Knickpoints are key geomorphological features for reconstructing the evolution of fluvial dissected basins, when the different perturbing factors affecting the ideally graded fluvial system have been detected. This study shows that even in a regionally small area, perturbations of river profiles are caused by multiple factors. Thus, attributing (automatically)-extracted knickpoints solely to one factor, can potentially lead to incomplete interpretations of catchment evolution.}, language = {en} } @article{MarrucciZeilingerRibolinietal.2018, author = {Marrucci, Monica and Zeilinger, Gerold and Ribolini, Adriano and Schwanghart, Wolfgang}, title = {Origin of Knickpoints in an Alpine Context Subject to Different Perturbing Factors, Stura Valley, Maritime Alps (North-Western Italy)}, series = {Geosciences}, volume = {8}, journal = {Geosciences}, number = {12}, publisher = {MDPI}, address = {Basel}, issn = {2076-3263}, doi = {10.3390/geosciences8120443}, pages = {20}, year = {2018}, abstract = {Natural catchments are likely to show the existence of knickpoints in their river networks. The origin and genesis of the knickpoints can be manifold, considering that the present morphology is the result of the interactions of different factors such as tectonic movements, quaternary glaciations, river captures, variable lithology, and base-level changes. We analyzed the longitudinal profiles of the river channels in the Stura di Demonte Valley (Maritime Alps) to identify the knickpoints of such an alpine setting and to characterize their origins. The distribution and the geometry of stream profiles were used to identify the possible causes of the changes in stream gradients and to define zones with genetically linked knickpoints. Knickpoints are key geomorphological features for reconstructing the evolution of fluvial dissected basins, when the different perturbing factors affecting the ideally graded fluvial system have been detected. This study shows that even in a regionally small area, perturbations of river profiles are caused by multiple factors. Thus, attributing (automatically)-extracted knickpoints solely to one factor, can potentially lead to incomplete interpretations of catchment evolution.}, language = {en} }