Article
Geochemistry & Geophysics
A. Peketi, A. Mazumdar, S. P. K. Pillutla, B. Sawant, H. Gupta
Summary: The study conducted Strontium and Neodymium isotopic analysis of lithogenic fractions collected from the Mahanadi basin to evaluate sediment sources and understand the link with climatic and tectonic forcings. Significant temporal fluctuations in Sr-Nd isotopic compositions suggest variations in sediment contributions controlled by monsoon intensity, orographic effects, glaciation, and tectonic activities. The study reveals multiple isotope fluctuations linked to climatic and tectonic forcings, highlighting the dominant control of Ganga-Brahmaputra sedimentation along the Indian east coast.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Multidisciplinary Sciences
Ananta P. Gajurel, Mary S. Hubbard, Bibek Giri, Aurora C. Elmore, Sanjeet Maka, Patrick A. Rafter, Aaron E. Putnam, Sandra Elvin, Alex Tait, Paul A. Mayewski
Summary: The research on the Taboche Lake core in the Everest region reveals geological records of past earthquakes and environmental changes over the past 1600 years, providing important information for future earthquake hazard assessment and glacial lake flood risk evaluation.
Article
Multidisciplinary Sciences
Lewis A. Jones, Philip D. Mannion, Alexander Farnsworth, Fran Bragg, Daniel J. Lunt
Summary: This study investigates the role of climate and palaeogeography in shaping the distribution of coral reefs over geological timescales. It finds that coral reefs had a wider latitudinal distribution in the past, but became more concentrated in tropical regions from the late Paleogene due to global cooling and tectonic evolution. While global warming might allow for poleward range expansions, coral reef ecosystems are unlikely to keep pace with anthropogenic climate change.
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
H. Jiang, J. Zhang, S. Zhang, N. Zhong, S. Wan, G. I. Alsop, H. Xu, Q. Guo, Z. Yan
Summary: This study reveals the complex interplay between tectonic and climatic controls on sedimentary evolution in East Asia during the Palaeogene, with tectonic activity influencing geological environments through particle coarsening and reduced weathering, while climate factors impacting East Asia through global warming and cooling episodes.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geology
J. M. Davis, P. M. Grindrod, S. G. Banham, N. H. Warner, S. J. Conway, S. J. Boazman, S. Gupta
Summary: This study characterizes sediment fan deposits associated with syn-tectonic sedimentation on Mars using high-resolution orbital data sets. The results demonstrate a link between depositional cyclicity and tectonic deformation, possibly representing regional processes within Valles Marineris.
Article
Geology
Kun Qi, Chenglin Gong, Ronald J. Steel, Dali Shao, Liangbo Ding, Hongxia Ma
Summary: Avulsions and splays of submarine channels play a crucial role in sediment distribution in deep-water areas, but their formation and development are not well understood. This study investigates the formation and development of avulsions and splays in two well-imaged submarine channel systems using high-resolution 3D seismic data. The results suggest that avulsions mainly occur during the early evolution stage of the channel systems, while splays develop consistently during the late evolution stage.
SEDIMENTARY GEOLOGY
(2022)
Article
Geography, Physical
Nate Mitchell, Adam M. Forte
Summary: It is unclear whether horizontal tectonic displacements would enhance the effects of contrasts in bedrock erodibility, which have been shown to drive landscape transience. However, our simulations using landscape evolution models suggest that the horizontal movement of contacts can enhance drainage divide migration and increases in channel steepness. These effects are more pronounced when the contact migrates along rivers with low drainage areas.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Geography, Physical
Ioana Persoiu, Gyorgy Sipos, Maria Radoane, Simon M. Hutchinson, Danuta J. Michczynska, Aurel Persoiu
Summary: The study discusses the formation of the Somes fluvial fan and the role of tectonic, climatic, and autogenic controls in its spatial and temporal dynamics over approximately 50-30 thousand years. The results suggest that natural subsidence variation created four local base levels, with autogenic factors playing a secondary role in the modern drainage configuration.
Article
Multidisciplinary Sciences
Shinji Yamashita, Yuji Yagi, Ryo Okuwaki, Kousuke Shimizu, Ryoichiro Agata, Yukitoshi Fukahata
Summary: The study developed a flexible finite-fault inversion method for complex multiple-fault earthquakes, which clarifies the evolution processes of rupture including variations of fault geometry through analyzing teleseismic P waveforms. Applied to the 2018 Gulf of Alaska earthquake, the method successfully revealed that the earthquake ruptured a conjugate system of N-S and E-W faults, showing irregular rupture behavior.
SCIENTIFIC REPORTS
(2021)
Article
Geosciences, Multidisciplinary
Fangbin Liu, Martin Danisik, Dewen Zheng, Kerry Gallagher, Junsheng Nie
Summary: The exhumation history of the SE Tibetan Plateau during the Cenozoic reveals two stages of rapid cooling, with the late Eocene attributed to tectonic processes and the middle Miocene linked to intensified precipitation and associated fault movements. Construction of the present-day topography of the SE Tibetan Plateau was largely driven by extrusion and upper crustal shortening in the late Eocene, but modified by climate-triggered fluvial incision and feedbacks initiated in the middle Miocene.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2021)
Article
Astronomy & Astrophysics
Chengrui Zhou, Yuandeng Shen, Xinping Zhou, Zehao Tang, Yadan Duan, Song Tan
Summary: Through observations and analysis, it is found that two successive filament eruptions are physically connected, with the eruption of the small filament causing a change in the topology that serves as evidence of physical continuity.
ASTROPHYSICAL JOURNAL
(2021)
Article
Geography, Physical
Baotian Pan, Xiaohua Li, Zhenbo Hu, David Bridgland, Qinhong Mo, Zijuan Dong, Menghao Li, Yanan Yang, Rob Westaway, Guanghui Dong, Shanjia Zhang, Meiling Zhong
Summary: The understanding of landform evolution related to the interaction between tectonic movements, climate, surface processes, and human activity is crucial. This study focuses on the paleo-channel formation in the Jiudong Basin, which is characterized by tectonic deformation, a dry climate, and ancient human activity. Based on geomorphic and sedimentary analysis, eight paleo-channels formed by two rivers have been identified, and their respective abandonment ages have been determined. The results suggest that river migration in this region is a result of the coupled and competitive relationship between rapid tectonic activity, climatic fluctuation, and human influence.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Kun Qi, Liangbo Ding, Chenglin Gong, Haiqiang Wang, Dali Shao, Zheng Cai, Hongxia Ma, Xiaoyong Xu, Zhenkui Jin
Summary: This study focuses on the role of submarine channel avulsion events in the evolution of channels, using high-resolution 3D seismic data and special techniques. The results show that different types of avulsion events play important roles in different stages of channel development, which helps in understanding deep-water deposits.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Multidisciplinary Sciences
Tzu-Yin Kasha Chen, Chi-Yao Hung, Jared Mullenbach, Kimberly Hill
Summary: Alluvial fans are depositional structures commonly found at the base of mountain ranges. They contribute significantly to local hazards when frequented by debris flows. This study analyzed field data and conducted experiments to investigate the correlation between fine particle content and directional changes in debris flows. The research found that decreasing fine particle content increases the variability of fan slopes and longer-term continuous experiments result in more complex surface channelizations compared to repeated flows.
SCIENTIFIC REPORTS
(2022)
Article
Geography, Physical
Peng Zhang, Shao-Yong Jiang, Renyuan Li, Lianfu Mei
Summary: Through multi-method provenance analyses of the Late Miocene-Pleistocene deltaic-submarine fan system, we found that the Sullivan River and Irrawaddy River transported rock debris from the eastern Tibetan Plateau. This suggests that climate and tectonic activities have direct effects on uplift and erosion in the southeastern Tibetan Plateau.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Brook Runyon, Joel E. Saylor, Brian K. Horton, James H. Reynolds, Brian Hampton
Summary: This paper assesses models for basin formation in the Altiplano and provides a coherent model of the effects of flat-slab subduction on basin formation based on magnetostratigraphy, palynology, and geochronology data.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geosciences, Multidisciplinary
Brian K. Horton
Summary: This study examines the formation mechanisms of long-duration unconformities and condensed stratigraphic sections in foreland basins using examples from the Andes. The study identifies various geodynamic mechanisms that contribute to accommodation reduction and hiatus development, and highlights the distinguishing characteristics of these mechanisms.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geosciences, Multidisciplinary
Brandon Shuck, Sean P. S. Gulick, Harm J. A. Van Avendonk, Michael Gurnis, Rupert Sutherland, Joann Stock, Erin Hightower
Summary: This study reveals the spatial-temporal evolution of stress during subduction initiation and suggests an accelerated transition to self-sustaining subduction. In contrast to previous hypotheses, the study proposes a four-dimensional evolution where horizontal forces initially dominate but vertical forces accelerate over time and facilitate the development of self-sustaining subduction.
Article
Geology
Brian K. Horton, Tomas N. Capaldi, Nicholas D. Perez
Summary: Convergent plate boundaries exhibit variations in orogenic width and intraplate deformation. Analysis of late Cenozoic contractile deformation along the Andean mountain front highlights the contrasting degrees of deformation advance towards the plate interior and demonstrates the role of lithospheric strengthening, weakening, and/or tectonic inheritance in shaping the orogenic architecture of Cordilleran margins.
Article
Geosciences, Multidisciplinary
Maureen A. L. Walton, Sean P. S. Gulick, Peter J. Haeussler
Summary: This study presents an improved tectonic framework for the Yakutat area in southeastern Alaska, based on marine geophysical data collected in 2012. By combining various data sources, the researchers were able to update the fault map, develop a structural model of Yakutat Bay, and assess the uncertainties of previous geologic coseismic uplift measurements. The results provide valuable insights into earthquake hazards in the region.
Article
Geochemistry & Geophysics
Chelsea Mackaman-Lofland, Brian K. Horton, Richard A. Ketcham, Nadine McQuarrie, Julie C. Fosdick, Facundo Fuentes, Kurt N. Constenius, Tomas N. Capaldi, Daniel F. Stockli, Patricia Alvarado
Summary: The deformation and foreland basin evolution in the Andes of western Argentina are influenced by changes in crustal inheritance and convergent margin dynamics. Through geological and thermochronological records, this study reveals the importance of different periods of shortening, migration, intraforeland basement deformation, and exhumation of foreland basin fill, as well as the significant control of thrust belt kinematics and basement heterogeneities.
Article
Multidisciplinary Sciences
Francisco J. Rodriguez-Tovar, Pim Kaskes, Jens Ormo, Sean P. S. Gulick, Michael T. Whalen, Heather L. Jones, Christopher M. Lowery, Timothy J. Bralower, Jan Smit, David T. King, Steven Goderis, Philippe Claeys
Summary: Researchers have reconstructed the macrobenthic tracemaker community and marine paleoenvironment in the Chicxulub impact area prior to the large impact event using paleoichnology and micropaleontology. The study shows that the K-Pg impact event did not have significant effects on the composition of the macroinvertebrate tracemaker community in the Chicxulub region.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Uisdean Nicholson, Veronica J. Bray, Sean P. S. Gulick, Benedict Aduomahor
Summary: Evidence of marine target impacts is rare on Earth. Seismic reflection data from the Guinea Plateau suggest the presence of a complex impact crater that formed approximately 66 million years ago, similar to the age of the Chicxulub impact crater. The crater may have formed as part of a closely timed impact cluster or through the breakup of a common parent asteroid.
Article
Geology
Cole M. Speed, John M. Swartz, Sean P. S. Gulick, John A. Goff
Summary: This study reveals the preservation and stratigraphic expression of coastal geomorphic features through the analysis of seismic reflection data. It also proposes recognition criteria for the seismic stratigraphic expression of coastal floodplain channels.
Article
Geochemistry & Geophysics
Sietze J. de Graaff, Catherine H. Ross, Jean-Guillaume Feignon, Pim Kaskes, Sean P. S. Gulick, Steven Goderis, Thomas Dehais, Vinciane Debaille, Ludovic Ferriere, Christian Koeberl, Nadine Mattielli, Daniel F. Stockli, Philippe Claeys
Summary: The study presents the first ages of pre-impact magmatic dikes preserved in Chicxulub's peak ring, providing insights into the subsurface composition and evolutionary history of the Yucatan Peninsula. The dating results reveal two age groups, Carboniferous dacites (328-318 Ma) and Jurassic dolerites (169-159 Ma), suggesting the presence of previously unsampled magmatic phases. The investigation of isotopic compositions further indicates that the dolerites contributed significantly to the Chicxulub impact melt rock, representing a pervasive Jurassic magmatic phase associated with the opening of the Gulf of Mexico.
Article
Geosciences, Multidisciplinary
Jacob T. Burstein, John A. Goff, Sean P. S. Gulick, Christopher Lowery, Patricia Standring, John Swartz
Summary: Understanding the role of antecedent topography in the evolution of barrier islands is valuable for preparing coastal communities for future impacts of climate change. This study investigates the stratigraphic framework of the Trinity River incised valley offshore Galveston, Texas to examine the influence of antecedent topography on the evolution of an early Holocene barrier island system. The findings highlight the central role of the geometry and elevation of the underlying antecedent topography in promoting both initiation and stabilization of the barrier island system.
Article
Geochemistry & Geophysics
Gail L. Christeson, Sean P. S. Gulick, Maureen A. L. Walton, Ginger A. Barth
Summary: This study investigates the crustal structure of the Gulf of Alaska Seamount Province and reveals that variations in crustal thickness and lithospheric thickness play a significant role in the magmatic underplating at seamounts and seamount provinces.
Article
Geochemistry & Geophysics
Christina M. Verhagen, Ji-In Jung, Sonia M. Tikoo, Axel Wittmann, David A. Kring, Stefanie Brachfeld, Laying Wu, Dale H. Burns, Sean P. S. Gulick
Summary: Using advanced microscopy techniques, this study investigated the nature and occurrence of primary and secondary Fe-oxide and Fe-sulfide minerals in the suevite of the Chicxulub impact crater. The results showed decomposition and dissolution patterns of large primary Fe-oxides and the presence of sub-micrometer Fe-oxide crystals concentrated within clay. Secondary Fe-sulfide minerals, associated with Ni- and Co-rich phases, were also found. These findings provide insights into hydrothermal trends and the remobilization of Fe and associated elements in suevites.
Article
Astronomy & Astrophysics
Cyril Grima, Nathaniel E. Putzig, Bruce A. Campbell, Matthew Perry, Sean P. S. Gulick, Russell C. Miller, Aaron T. Russell, Kirk M. Scanlan, Gregor Steinbrugge, Duncan A. Young, Scott D. Kempf, Gregory Ng, Dillon Buhl, Donald D. Blankenship
Summary: Building on previous research, this study investigates the response of the Martian surface to orbital radar using a reflectometry technique known as radar statistical reconnaissance. The results provide statistical parameters describing the surface and near-surface structure of the test region, allowing for the identification of smooth and level terrains. The findings also highlight the complementarity of different data sets and advocate for the use of self-affine radar backscattering models to account for roughness variations at different scales.
PLANETARY SCIENCE JOURNAL
(2022)
Meeting Abstract
Geochemistry & Geophysics
S. P. S. Gulick, J. V. Morgan
METEORITICS & PLANETARY SCIENCE
(2022)