Article
Geochemistry & Geophysics
Xinnan Li, Ian K. D. Pierce, Jayne M. Bormann, William C. Hammond, Zhuqi Zhang, Chuanyou Li, Wenjun Zheng, Peizhen Zhang
Summary: The study used a GPS block model to investigate tectonic deformation in the northeastern Tibetan Plateau and its surroundings, highlighting the importance of including less active faults for a closer examination of strain partitioning. The predicted motion directions and slip rates of active faults in the preferred model were found to be consistent with geological estimates, supporting the assumption that decadal GPS slip rates are representative of millennial-scale geologic slip rates. The observed fault kinematics in the region were interpreted as the result of relative motions between different blocks and block rotations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geology
Abdul Qayyum, Jorik Willem Poesse, Nuretdin Kaymakci, Cornelis G. Langereis, Erhan Gulyuz, Naveed Ahsan
Summary: The tectonic evolution of the Potwar Plateau in Pakistan has been characterized by two distinct Neogene deformation phases, representing thrust and strike-slip tectonics. The eastern part of the plateau is dominated by NE-SW trending folds and thrust faults, while these structural features are absent in the western part. This difference is attributed to the distribution of deposits of the Neoproterozoic Salt Range Formation beneath the plateau, leading to different modes of deformation in the two domains.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Automation & Control Systems
Yang Honglei, Jiang Qiao, Han Jianfeng, Kang Ki-Yeob, Peng Junhuan
Summary: This study uses the ICSBAS technique to process PALSAR data and finds that frozen soil in the Qinghai-Tibet Engineering Corridor experiences frost heave and thaw settlement, reaching a maximum settlement of 12 cm along the Qinghai-Tibet Railway. The InSAR results show good consistency with ground leveling data, and the deformation in the permafrost area is correlated with temperature, human activities, and topography.
JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS
(2021)
Article
Geosciences, Multidisciplinary
Taylan Sancar
Summary: The collision of the Arabian and Eurasian plates led to the uplift of the Turkish-Iranian Plateau, where ongoing debates focus on the conversion of post-collisional convergence to strain. Analysis of the NW-trending Bitlis-Zagros Mountain Range (BZMR) reveals significant internal deformation patterns, with different fault segments showing varying uplift rates. The study also suggests that apart from the thrust fault marking the collision zone, the western end of the BZMR undergoes a higher convergence zone where shortening is converted to vertical plane strain.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geology
Yajuan Yuan, Yun Zhong, Feng Guo, Bin Xia, Yuquan Zhang
Summary: This paper presents geochemical, geochronological, and isotope data of post-collisional K-rich igneous rocks from the western Kunlun Mountains in the Qinghai-Tibet Plateau. The geochemical analysis suggests that the granite porphyries originated from partial melting of thickened lower crust, while the shoshonites were likely formed by partial melting of lithospheric mantle with the addition of subducted and recycled oceanic sediments.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geochemistry & Geophysics
Amaneh Kaveh-Firouz, Jean-Pierre Burg, Negar Haghipour, Sanjay Kumar Mandal, Marcus Christl, Ali Mohammadi
Summary: The study focuses on the tectonic and climatic controls on landscape evolution in the NNW Iranian Plateau and west Alborz region. By analyzing erosion rates and topographic/climatic metrics, the researchers found that erosion rates were low in the Plateau and relatively high in the west Alborz, with sediment fluxes controlled by topographic parameters and surface uplift and active thrust-faulting in the respective regions. Climate had a secondary role in erosion rates. Exhumation rates were also calculated and showed an increase during the collision between Arabia and Eurasia. The study highlights the importance of understanding the interplay between tectonic and climatic factors in shaping landscapes.
Article
Geochemistry & Geophysics
Lorenz Michel-Wolf, Todd A. Ehlers, Rebecca Bendick
Summary: In the earthquake cycle, some deformation is unrecoverable, especially in the accumulation of deformation in the forearc high topography. By comparing data over long timescales, we have identified the contributions of elastic and inelastic deformation, providing further insights into the limitations of simple mechanical models.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Alexander Koptev, Matthias Nettesheim, Todd A. Ehlers
Summary: This study investigates rapid localized exhumation at plate corners using a fully-coupled geodynamic and geomorphological modeling approach. The results suggest that the observed structures can be reproduced numerically by considering non-rigid subducting plates, complex rheology and stratification, and fluvial erosion.
Article
Geosciences, Multidisciplinary
R. M. Flowers, P. K. Zeitler, M. Danisik, P. W. Reiners, C. Gautheron, R. A. Ketcham, J. R. Metcalf, D. F. Stockli, E. Enkelmann, R. W. Brown
Summary: The field of (U-Th)/He geochronology and thermochronology has experienced significant growth over the past 25 years. However, there is currently a lack of universally agreed upon protocols for reporting data and uncertainties. This study aims to address these issues and provides recommendations to enhance the reliability and cross-laboratory comparison of (U-Th)/He data.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Meteorology & Atmospheric Sciences
Svetlana Botsyun, Sebastian G. Mutz, Todd A. Ehlers, Alexander Koptev, Xun Wang, Benjamin Schmidt, Erwin Appel, Dieter E. Scherer
Summary: This study investigates the changes in hydroclimate and its driving forces in Central Asia and the Tibetan Plateau during the last 3 million years. The results suggest that monsoon intensity and the position of the high-level westerly jet have a significant impact on the hydroclimate of Asia.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Correction
Geosciences, Multidisciplinary
George E. Konidaris, Dimitris S. Kostopoulos, Matteo Maron, Mirjam Schaller, Todd A. Ehlers, Elina Aidona, Mattia Marini, Vangelis Tourloukis, Giovanni Muttoni, George D. Koufos, Katerina Harvati
Article
Geochemistry & Geophysics
Scott Jess, Eva Enkelmann, William A. Matthews
Summary: The timing of surface uplift in the Appalachian Mountains has been a topic of controversy. This study aims to resolve the exhumation history of the region using detrital laser ablation apatite (U-Th-Sm)/He dating. Results show a majority of Cretaceous dates, indicating a lack of significant Cenozoic exhumation. These findings have implications for understanding surface uplift and landscape evolution.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Todd A. Ehlers, Deliang Chen, Erwin Appel, Tobias Bolch, Fahu Chen, Bernhard Diekmann, Michaela A. Dippold, Markus Giese, Georg Guggenberger, Hui -Wen Lai, Xin Li, Junguo Liu, Yongqin Liu, Yaoming Ma, Georg Miehe, Volker Mosbrugger, Andreas Mulch, Shilong Piao, Antje Schwalb, Lonnie G. Thompson, Zhongbo Su, Hang Sun, Tandong Yao, Xiaoxin Yang, Kun Yang, Liping Zhu
Summary: This study investigates the impacts of climate change on permafrost, hydrology, and ecosystems on the Tibetan Plateau. By compiling existing studies, the authors show the present-day trends in environmental change and discuss two possible future pathways for the plateau ecosystems. They emphasize the importance of human intervention measures in determining the future of the region.
EARTH-SCIENCE REVIEWS
(2022)
Article
Multidisciplinary Sciences
Alexander Koptev, Matthias Nettesheim, Sarah Falkowski, Todd A. Ehlers
Summary: This article presents a geomorphic model of the studied area in southern Alaska. The results show that the interaction between tectonic deformation and surface erosion processes controls the rock uplift patterns in the region.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Svetlana Botsyun, Todd A. Ehlers, Alexander Koptev, Madelaine Boehme, Katharina Methner, Camille Risi, Christian Stepanek, Sebastian G. Mutz, Martin Werner, Daniel Boateng, Andreas Mulch
Summary: The Middle Miocene in Europe experienced significant changes in climate, environment, and vegetation. However, detailed reconstructions of temperature and precipitation patterns during this period are lacking. In this study, a high-resolution isotope-enabled general circulation model was used to investigate these changes. The modeling results are consistent with available temperature data, but show lower precipitation rates compared to pre-industrial times for central Europe. The changes in precipitation are attributed to shifts in pressure patterns and associated changes in wind direction and humidity. Additionally, the study found that changes in precipitation isotopes were larger in high elevation regions, while topography played a smaller role.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Geosciences, Multidisciplinary
S. J. Ring, S. G. Mutz, T. A. Ehlers
Summary: The long-term extent of the Earth system response to anthropogenic interference remains uncertain. However, the geologic record offers insights into this problem as Earth has previously cycled between warm and cold intervals during the Phanerozoic. We present an updated compilation of surface temperature proxies for several key time intervals to reconstruct global temperature changes during the Cenozoic. Our results suggest that the Earth system was less sensitive to greenhouse gas forcing for most of the Cenozoic and that sensitivity must have increased by at least a factor of 2 during the Plio-Pleistocene. Slow feedbacks will raise global surface temperatures by more than 3 degrees C in the coming millennia, even if anthropogenic forcing is stabilized at the present-day value (2 W/m2), and that their impact will diminish with further warming.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Geochemistry & Geophysics
Nevena Andric-Tomasevic, Alexander Koptev, Giridas Maiti, Taras Gerya, Todd A. Ehlers
Summary: The study investigates the process of slab tearing in the context of non-collisional geodynamics by using a thermo-mechanical numerical approach. It finds that parameters such as subduction obliquity angle, age of oceanic slab, and partitioning of boundary velocities play a significant role in the occurrence of slab detachment. The results show similarities to observed features in many subduction zones.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Victor Sacek, Sebastian G. Mutz, Tacio C. Bicudo, Renato P. de Almeida, Todd A. Ehlers
Summary: This study reveals that the formation of the Andes, climate evolution, and sea-level oscillations were the controlling factors for the transition from intermittent marine to lacustrine environments in the Amazon before the formation of the transcontinental river. It is also found that the evolving climate shortened the time interval between the end of marine influence and the onset of the transcontinental Amazon River.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Editorial Material
Multidisciplinary Sciences
Todd A. Ehlers
Summary: Changes to the landscape over millions of years drive Earth system processes.
Article
Geochemistry & Geophysics
Paul R. Eizenhoefer, Christoph Glotzbach, Jonas Kley, Todd A. Ehlers
Summary: The formation of the eastern European Alps is a result of the intrusion of the Adria plate into the European plate. Recent tomography has shown detached slab fragments, indicating continuous southward subduction of the European lithosphere. Orogen-scale exhumation driven by rock displacement along active faults reflects subduction polarity within the framework of Coulomb wedge theory.
Review
Geography, Physical
Sierd Cloetingh, Pietro Sternai, Alexander Koptev, Todd A. Ehlers, Taras Gerya, Istvan Kovacs, Johannes Oerlemans, Fred Beekman, Yan Lavallee, Donald Dingwell, Eszter Bekesi, Kristof Porkolab, Magdala Tesauro, Alessio Lavecchia, Svetlana Botsyun, Veleda Muller, Francois Roure, Enrico Serpelloni, Liviu Matenco, Sebastien Castelltort, Donato Giovannelli, Alberto Vitale Brovarone, Nadia Malaspina, Giovanni Coletti, Pierre Valla, Jon Limberger
Summary: Understanding the interactions between surface and deep Earth processes is crucial for scientific research in various areas. The TOPO-EUROPE initiative serves as a platform for integrated surface and deep Earth sciences. This review discusses the quantitative understanding achieved through TOPO-EUROPE and the potential for future research.
GLOBAL AND PLANETARY CHANGE
(2023)