Manfred R. Strecker

University of Potsdam

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Co-Authors

Bodo Bookhagen

University of Potsdam

105

Daniel Melnick

Austral University of Chile

Taylor Schildgen

University of Potsdam

Edward R. Sobel

University of Potsdam

Heiko Pingel

University of Potsdam

Ricardo N. Alonso

National University of Salta

Rasmus Thiede

University of Potsdam

Dirk Scherler

Freie Universität Berlin

G. E. Hilley

Stanford University

Paolo Ballato

Roma Tre University

Cooperative Institutions

University of Potsdam

171

Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences

Consejo Nacional de Investigaciones Científicas y Técnicas

Centre National de la Recherche Scientifique

ETH Zurich

Freie Universität Berlin

Stanford University

Planetary Science Institute

University of Arizona

National University of Salta

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Late Quaternary Intensified Monsoon Phases Control Landscape Evolution in the NW Himalaya

AGU Fall Meeting Abstracts (2003)

Bodo Bookhagen Rasmus Thiede Manfred R. Strecker

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Marked spatial gradient in the topographic evolution of the Andes spanning the Chilean flat-slab transition: evidence from stable isotope paleoaltimetry and zircon double dating

2015 AGU Fall Meeting (2015)

Gregory D. Hoke Devin McPhillips Laura Giambiagi Carmala N. Garzione J. Brian Mahoney

Slab

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Identification of Debris‐Flow Channels Using High‐Resolution Topographic Data: A Case Study in the Quebrada del Toro, NW Argentina

Journal of Geophysical Research Earth Surface (2021)

Ariane Mueting Bodo Bookhagen Manfred R. Strecker

Abstract Resolving Earth's surface at the meter scale is essential for an improved understanding of the dynamics of mass‐movement processes. In this study, we explore the applicability and potential of digital elevation models (DEMs) derived from stereophotogrammetry to detect debris‐flow channels in the Quebrada del Toro in the northwestern Argentine Andes. Our analysis relies on a high‐resolution (3 m) DEM created from SPOT‐7 tri‐stereo satellite data. We carefully validated DEM quality with ∼6,000 differential GPS points and identified optimal parameters for DEM generation in high‐relief terrain. After multiple processing steps, we achieved an accuracy of 0.051 ± 1.915 m (1 σ ) using n = 3,139 control points with cm precision. Previous studies have used the drainage area and slope framework to identify topographic signatures of debris flows within a catchment. We built upon this and investigated individual river‐channel segments using connected‐component (CC) analysis on meter‐scale topographic data. We define CC as segments of similar slope along the channel profile. Based on seven manually identified debris‐flow catchments, we developed a debris‐flow similarity index using component length and mean channel‐segment slope and identified channel segments that have likely been shaped by debris flows. The presented approach has the potential to resolve intra‐catchment variability of transport processes, allows to constrain the extent of debris‐flow channels more precisely than slope‐area analysis, and highlights the versatility of combined space‐ and field‐based observations for natural‐hazard assessments.

Debris flow

10.1029/2021jf006330

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Reply to Carrapa et al.: Central Puna uplift: Addressing criticisms, affirming conclusions

Proceedings of the National Academy of Sciences (2024)

Heiko Pingel Ricardo N. Alonso Bodo Bookhagen John M. Cottle Andreas Mulch

Informal verbal interaction is the core matrix for human social life. A mechanism for coordinating this basic mode of interaction is a system of turn-taking that regulates who is to speak and when. Yet relatively little is known about how this system ...

10.1073/pnas.2406845121

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Late Cenozoic Moisture History of East Africa

Science (2005)

Martin H. Trauth Mark Maslin Alan L. Deino Manfred R. Strecker

Lake sediments in 10 Ethiopian, Kenyan, and Tanzanian rift basins suggest that there were three humid periods at 2.7 to 2.5 million years ago (Ma), 1.9 to 1.7 Ma, and 1.1 to 0.9 Ma, superimposed on the longer-term aridification of East Africa. These humid periods correlate with increased aridity in northwest and northeast Africa and with substantial global climate transitions. These episodes could have had important impacts on the speciation and dispersal of mammals and hominins, because a number of key events, such as the origin of the genus Homo and the evolution of the species Homo erectus, took place in this region during that time.

Aridification

Homo erectus

East African Rift

Rift valley

Paleoclimatology

10.1126/science.1112964

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Citations (369)

Evolution of a Young Rift Border-Fault System Constrained by Low Temperature (U-Th/He) Thermochronometry: North Basin, Malawi Rift, East Africa

AGUFM (2006)

Estelle Mortimer J. Foeken Manfred R. Strecker Finlay M. Stuart

East African Rift

Rift valley

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Neotectonic Activity in the Low-Strain Broken Foreland (Santa Bárbara System) of the North-Western Argentinean Andes (26°S)

Lithosphere (2020)

Ahmad Arnous Martin Zeckra Agostina Venerdini Patricia A. Alvarado J Ramón Arrowsmith

Abstract Uplift in the broken Andean foreland of the Argentine Santa Bárbara System (SBS) is associated with the contractional reactivation of basement anisotropies, similar to those reported from the thick-skinned Cretaceous-Eocene Laramide province of North America. Fault scarps, deformed Quaternary deposits and landforms, disrupted drainage patterns, and medium-sized earthquakes within the SBS suggest that movement along these structures may be a recurring phenomenon, with yet to be defined repeat intervals and rupture lengths. In contrast to the Subandes thrust belt farther north, where eastward-migrating deformation has generated a well-defined thrust front, the SBS records spatiotemporally disparate deformation along structures that are only known to the first order. We present herein the results of geomorphic desktop analyses, structural field observations, and 2D electrical resistivity tomography and seismic-refraction tomography surveys and an interpretation of seismic reflection profiles across suspected fault scarps in the sedimentary basins adjacent to the Candelaria Range (CR) basement uplift, in the south-central part of the SBS. Our analysis in the CR piedmont areas reveals consistency between the results of near-surface electrical resistivity and seismic-refraction tomography surveys, the locations of prominent fault scarps, and structural geometries at greater depth imaged by seismic reflection data. We suggest that this deformation is driven by deep-seated blind thrusting beneath the CR and associated regional warping, while shortening involving Mesozoic and Cenozoic sedimentary strata in the adjacent basins was accommodated by layer-parallel folding and flexural-slip faults that cut through Quaternary landforms and deposits at the surface.

Basement

Thrust fault

10.2113/2020/8888588

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The cryptic seismic potential of blind faults revealed by off-fault geomorphology, Pichilemu, Chile.

Research Square (Research Square) (2020)

Julius Jara‐Muñoz Daniel Melnick Anne Socquet Joaquín Cortés‐Aranda Dominik Brill

Abstract In seismically-active regions, mapping capable faults and estimating their recurrence time is the first step to assess seismic hazards. Fault maps are commonly based on geologic and geomorphic features evident at the surface; however, mapping blind faults and estimating their seismic potential is challenging because on-fault diagnostic features are absent. Here, we study the Pichilemu Fault in coastal Chile, unknown until it generated a M7.0 earthquake in 2010. The lack of evident surface faulting suggests a partly-hidden blind fault. Using off-fault deformed marine terraces, we estimate a slip-rate of 0.42 ± 0.04 m/ka, which when integrated with deformation estimated from satellite geodesy during the 2010 earthquake suggests a 2.5 ± 0.25 ka recurrence time for M6.6-6.9 extensional earthquakes. We propose that extension is associated with stress changes during megathrust earthquakes and accommodated by sporadic slip during upper-plate earthquakes. Our results have implications for assessing the seismic potential of cryptic faults along seismically-active coasts.

Extensional fault

10.21203/rs.3.rs-86121/v1

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Glacial catchment erosion from detrital zircon (U‐Th)/He thermochronology: Patagonian Andes

Journal of Geophysical Research Earth Surface (2021)

Sarah Falkowski Todd A. Ehlers Andrea Madella Christoph Glotzbach Viktoria Georgieva

Abstract Alpine glacial erosion exerts a first‐order control on mountain topography and sediment production, but its mechanisms are poorly understood. Observational data capable of testing glacial erosion and transport laws in glacial models are mostly lacking. New insights, however, can be gained from detrital tracer thermochronology. Detrital tracer thermochronology works on the premise that thermochronometer bedrock ages vary systematically with elevation, and that detrital downstream samples can be used to infer the source elevation sectors of sediments. We analyze six new detrital samples of different grain sizes (sand and pebbles) from glacial deposits and the modern river channel integrated with data from 18 previously analyzed bedrock samples from an elevation transect in the Leones Valley, Northern Patagonian Icefield, Chile (46.7°S). We present 622 new detrital zircon (U‐Th)/He (ZHe) single‐grain analyses and 22 new bedrock ZHe analyses for two of the bedrock samples to determine age reproducibility. Results suggest that glacial erosion was focused at and below the Last Glacial Maximum and neoglacial equilibrium line altitudes, supporting previous modeling studies. Furthermore, grain age distributions from different grain sizes (sand, pebbles) might indicate differences in erosion mechanisms, including mass movements at steep glacial valley walls. Finally, our results highlight complications and opportunities in assessing glacigenic environments, such as dynamics of sediment production, transport, transient storage, and final deposition, that arise from settings with large glacio‐fluvial catchments.

Bedrock

Thermochronology

10.1029/2021jf006141

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Erosion and climate change in the Santa Maria Basin, NW Argentina during the last 40,000 yrs

Martin H. Trauth Bodo Bookhagen A. Mueller Manfred R. Strecker

Present erosion and sediment flux in the semi-arid intramontane Santa Maria Basin, NW Argentina are compared with conditions during a period of wetter and more variable climate at about 30,000 14C yrs ago. The results suggest that the influence of climate change on the overall erosional sediment budget is significant, mainly because of a change in the erosion regime coupled with an increase in mass movements. The most effective mechanism to increase landslide activity in this environment is a highly variable climate on inter-annual timescales. In contrast, Quaternary changes in erosional budgets due to variations in moisture regimes is small in the Santa Maria Basin. Since the magnitude of a potential increase in background erosion as well as enhanced landsliding is smaller than typical levels of uncertainty of erosional budgets for such large basins, it is not likely that climate-driven erosional unloading can influence tectonic style and rates in this semi-arid environment on time scales of several 103 to 104 years.

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