Article
Geochemistry & Geophysics
Julia Ribeiro, Christopher J. Macleod, C. Johan Lissenberg
Summary: Comparing the Troodos ophiolite to Pliocene-aged basalts, researchers found similar characteristics in slab fluids, which support the formation of the Troodos ophiolite in a near-trench setting. Unlike the Marianas, Troodos lacks juvenile arc volcanism but has extensive boninitic dikes and extrusive sections, indicating that it likely developed through organized seafloor spreading in the early stages of subduction of the Neo-Tethyan plate.
Review
Geology
Fatemeh Sepidbar, Seyed Masoud Homam, Mohamed Zaki Khedr, Robert J. J. Stern, Orhan Karsli
Summary: Several Mesozoic ophiolites in Iran formed in response to Late Cretaceous subduction initiation. They are remnants of Neo-Tethys ocean lithosphere formed during subduction initiation and were emplaced onto the southern flank of Eurasia. Most show SSZ-type geochemical affinity.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Juan Pablo Ramos, Paul Mann
Summary: This study provides the first recognition of spreading ridges in the Yucatan Basin, suggesting a SW-NE opening direction. It also estimates the age of the oceanic crust and suggests that the Yucatan Basin is a back-arc basin formed during the northeastward movement of the Caribbean volcanic arc. Furthermore, it identifies left-lateral strike-slip faults that extend into the Cuban volcanic arc.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geosciences, Multidisciplinary
Mahmoud Leila, Mohamed El Sharawy, Adel Mohamed, Christian Gorini, Monica Giona Bucci, Ahmed E. Radwan, Massimo Moretti
Summary: The Upper Messinian Abu Madi Formation in the Nile Delta is a result of sediment deposition during the final stage of the Messinian salinity crisis. The presence of soft-sediment deformation structures (SSDS) suggests the role of earthquakes in causing liquefaction processes and deformation. Pressure disequilibrium is observed throughout the Abu Madi Formation, indicating the influence of seismic activity. The heterolithic nature of the sediments and lack of bioturbation contribute to the preservation of seismically induced deformation.
GEOLOGICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Florian Petersen, Dietrich Lange, Bo Ma, Ingo Grevemeyer, Jacob Geersen, Dirk Klaeschen, Eduardo Contreras-Reyes, Sergio Barrientos, Anne M. Trehu, Emilio Vera, Heidrun Kopp
Summary: The aftershock distribution of the 2014 Mw 8.1 Iquique earthquake offshore northern Chile suggests that seismic activity updip of the main earthquake area reflects active subduction erosion processes. The lack of sediment accretion and subduction erosion over millions of years has resulted in a very weak and aseismic frontal wedge. This study links shallow subduction zone seismicity to subduction erosion processes controlling the evolution of the overriding plate.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Felipe Orellana, Joaquin Hormazabal, Gonzalo Montalva, Marcos Moreno
Summary: In this study, the coastal subsidence in central Chile was measured using multi-temporal differential interferometric synthetic aperture radar (MT-InSAR). The results showed variations in subsidence rates at different scales and identified an anomalous subsidence zone. The study also analyzed the impact of earthquakes on coastal subsidence. These findings have implications for the planning of coastal urban areas and infrastructure in Chile.
Article
Geochemistry & Geophysics
Rex N. Taylor, Osamu Ishizuka, Isabel Hessey, Agnes Michalik, Lauren Stillwell, Stephen White
Summary: The evolution and inputs beneath the supra-subduction spreading ridge have been traced using high-resolution isotope measurements of fluid-mobile lead, showing variable amounts of lead from the mantle wedge and non-mobile elements from the slab.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Sarada P. Mohanty
Summary: The Bastar Craton is a key geological formation in Peninsular India, formed during the Paleoarchean Era and experiencing multiple orogenic events. Eventually amalgamating with the Bundelkhand Craton, it preserves sedimentary and metamorphic rocks from different periods, as well as early mineralization patterns, providing important insights into the evolution of the ocean and atmospheric conditions in the early Earth.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
C. M. Tewksbury-Christle, W. M. Behr
Summary: Low Velocity Zones (LVZs) with high Vp-Vs ratios are commonly found along the downdip extents of modern subduction zones, collocated with complex seismic and transient deformation patterns. They are attributed to high pore fluid pressures, but the spatial correlation between LVZs and the subduction interface, as well as the rock types defining them, remain unclear. This study characterizes the seismic signature of a fossil subduction interface shear zone in northern California sourced from the same depth range as modern LVZs, suggesting that LVZs may represent the subduction interface shear zone to some extent.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Rosalia Lo Bue, Manuele Faccenda, Jianfeng Yang
Summary: This study uses geodynamic and seismological modeling techniques to simulate the large-scale evolution of the Central Mediterranean and the associated strain-induced upper mantle fabrics and seismic anisotropy. It highlights the importance of coupling geodynamic and seismological modeling to better constrain the tectonic evolution of complex convergent margins such as the Central Mediterranean.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Aaron G. Wech
Summary: The Pacific Northwest Seismic Network has been detecting and locating tectonic tremor in the Cascadia subduction zone for the past 12 years, resulting in a catalog of over 500,000 tremor epicenters. A new methodology for routine tremor detection in the region was presented, with a focus on the southern edge of the subduction zone where a newly identified tremor source was located. The study found differences in tremor activity between northern and southern Cascadia, with the highest energy rates occurring in the north.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Zhi Wang, Jian Lin
Summary: The frequent occurrence of large thrust earthquakes and subsequent tsunamis in a subduction zone are attributed to multiple factors, including structural heterogeneity, fluid saturation, and topographic variations of the subducting oceanic plate. This study investigates the impact of these factors on the 2021 Mw 7.1 Fukushima-Oki earthquake and interplate seismic coupling in the northeastern Japan subduction zone. The results reveal that high-V zones with high-density thrust earthquakes indicate strong interplate seismic coupling, while low-V patches reflect weak interplate coupling or decoupling. Additionally, seamount subduction plays a significant role in seismography and the mechanical strength variation of interplate coupling in the forearc seismogenic zone.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geography, Physical
D. Artiaga, J. Garcia-Veigas, D. Cendon, C. Atalar, L. Gibert
Summary: A large amount of evaporites were deposited during the Messinian Salinity Crisis across the Mediterranean, forming a three-stage model. Researchers in the Mesaoria Basin in North Cyprus discovered MSC gypsum deposits, which can be tentatively assigned to different stages based on the lithostratigraphic gypsum succession. This study highlights the local variations in sedimentary records and raises questions about the systematic application of the traditional ‘three-stage’ lithostratigraphic model in North Cyprus and other MSC Mediterranean evaporite successions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geology
Yebo Liu, Ross N. Mitchell, Michael Brown, Tim E. Johnson, Sergei Pisarevsky
Summary: There is a clear spatiotemporal correlation between different types of metamorphism and active convergent plate margins since the Jurassic. The relationship extends into the past, with low-T/P metamorphism located near plate margins and intermediate-and high-T/P metamorphism occurring further away. The style of orogenesis has evolved from hotter to colder, leading to the emergence of low-T/P metamorphism in the Cryogenian.
Article
Geology
Rahmi Melih Cortuk, Omer Faruk Celik, Mutlu Ozkan, Andrea Marzoli, Anil Alkan
Summary: The metamorphic sole rocks found in the Pinarbasi Ophiolite in Turkey are well-preserved rock units that provide insights into intra-oceanic subduction and obduction events in the Tethys Ocean. These rocks consist of various types and display different geochemical signatures, indicating different metamorphic conditions and depths within the subduction zone.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Laura Frahm, Christian Huebscher, Arne Warwel, Jonas Preine, Hendrik Huster
NEAR SURFACE GEOPHYSICS
(2020)
Article
Geochemistry & Geophysics
Niklas Ahlrichs, Christian Huebscher, Vera Noack, Michael Schnabel, Volkmar Damm, Charlotte M. Krawczyk
Article
Geochemistry & Geophysics
J. Preine, B. Schwarz, A. Bauer, C. Huebscher
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geosciences, Multidisciplinary
Wiebke Schaefer, Christian Huebscher, Daniel Sopher
Summary: This study analyzes the glacial origin and internal structure of the Klints Bank east of Gotland, classifying it as a (giant) drumlin with a seismic velocity of about 2000 m/s, and signs of fluid presence within the Quaternary unit.
GEO-MARINE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Michael Schnabel, Vera Noack, Niklas Ahlrichs, Christian Huebscher
Summary: This study presents a model for the Bay of Mecklenburg using seismic profiles, revealing depth-dependent velocity trends in Cenozoic and Mesozoic strata. The study also highlights significant burial anomalies within Lower Triassic units compared to Upper Cretaceous units, possibly due to greater erosion during Upper Jurassic/Lower Cretaceous times. Additionally, the study demonstrates the value of seismic velocities deduced from surface-based measurements in areas with sparse drilling coverage.
GEO-MARINE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Niklas Ahlrichs, Vera Noack, Christian Huebscher, Elisabeth Seidel, Arne Warwel, Jonas Kley
Summary: The study investigates the evolution of Zechstein salt structures in the Baltic sector of the North German Basin from Late Cretaceous to Cenozoic through seismic analysis, revealing significant events and characteristics in the salt structure evolution process, which provide insights into the understanding of salt structure development in the region.
Article
Geochemistry & Geophysics
R. H. W. Romer, C. Beier, K. M. Haase, A. Eberts, C. Huebscher
Summary: The Dom Joao de Castro seamount in the Hirondelle Basin (Azores) is a central volcano controlled by regional tectonic stress field. The combination of structural and geochemical data provides insights into the mechanisms and evolution of the seamount formation.
Article
Geosciences, Multidisciplinary
P. Nomikou, D. Papanikolaou, D. Lampridou, M. Blum, C. Huebscher
Summary: The hydrographic survey of the southeastern coastal margin of Lesvos Island in Greece was conducted in January 2018 by R/V METEOR. The main morphological characteristic of the southern margin of Lesvos Island is a sub-parallel elongated basin, interrupted by an oblique narrow channel. The structure consists of normal faults, strike-slip faults, and vertical fault zones, reflecting the eastern margin tectonic frame of the Aegean microplate.
GEO-MARINE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Jonas Preine, Jens Karstens, Christian Hubscher, Gareth J. Crutchley, Timothy H. Druitt, Florian Schmid, Paraskevi Nomikou
Summary: This study investigates the volcanic island sector collapses in the Christiana-Santorini-Kolumbo Volcanic Field, finding that the distribution and volume of the volcanic island mass-transport deposit in this area are extensive and significant. It highlights the close relationship between crustal extension, mass transport, and volcanic activity, emphasizing the importance of cascading geohazards in marine volcanic systems.
Article
Geosciences, Multidisciplinary
Christoph Beier, Felix Genske, Christian Huebscher, Karsten M. Haase, Wolfgang Bach, Paraskevi Nomikou
Summary: This study presents new geological data from the Azores Plateau, indicating that the volcanic activity in the region is influenced by plate reorganisation and upper mantle anomalies. The model suggests that the flood basalt province of the Azores is only about 30% of previous estimates and may have been formed by excess melting in a localized, small-scale upper mantle region.
Article
Geochemistry & Geophysics
Arne Warwel, Christian Huebscher, Niklas Ahlrichs, Michael Schnabel
Summary: The research investigates the evolution of the North German Basin, focusing on processes such as basin inversion, uplift and erosion, and extension. Machine learning is employed to analyze seismic data and derive velocity models for the subsurface. The study provides new insights into the magnitude of basin exhumation and the locations of glacial tunnel valleys, as well as highlighting the importance of near surface velocity analysis in shallow marine settings.
MARINE GEOPHYSICAL RESEARCH
(2022)
Article
Geochemistry & Geophysics
J. Preine, C. Huebscher, J. Karstens, P. Nomikou
Summary: By using high-resolution reflection seismic imagery, this study provides insights into the formation of the Christiona-Santorini-Kolumbo (CSK) rift zone and reveals the correlation between volcanic activity and specific fault movements. The findings suggest that the tectonic evolution of the rift is controlled by deep-seated processes, and volcanic activity has a secondary feedback mechanism on the tectonic system. A comparison with neighboring volcanic fields highlights the potential arc-wide scale of the observed volcano-tectonic interplay.
Article
Astronomy & Astrophysics
Arne Warwel, Christian Huebscher, Matthias Hartge, Maike Artschwager, Wiebke Schaefer, Jonas Preine, Tobias Haecker, Victoria Strehse, Janis Karuss, Thomas Luedmann
Summary: The Baltic Basin is famous for its Paleozoic hydrocarbon reservoirs. This study investigated the hydrocarbon migration pathways and escape structures from Paleozoic source rocks to the seafloor using multibeam, sediment sub-bottom profiler, and seismic reflection data. The results identified a hydrocarbon migration system in Silurian and Devonian strata, with migration occurring beneath sealing layers, along faults, and through seafloor escape structures. The migration trend was directed updip towards the Gotland Depression. The study also highlighted the importance of the regional geological setting and iceberg scouring in facilitating hydrocarbon migration.
EARTH AND SPACE SCIENCE
(2023)
Article
Geochemistry & Geophysics
Jens Karstens, Jonas Preine, Steven Carey, Katherine L. C. Bell, Paraskevi Nomikou, Christian Huebscher, Danai Lampridou, Morelia Urlaub
Summary: This study reveals the underwater topography around Santorini and its relationship with volcanic eruption processes using high-resolution seismic reflection data and multibeam echosounder bathymetry. The study identifies different types of mass transport deposits, including depositional and slope failure-related deposits, and their association with volcanic and tectonic activities. The findings have important implications for seismic and tsunami hazard assessment in the region.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Multidisciplinary Sciences
Jens Karstens, Jonas Preine, Gareth J. Crutchley, Steffen Kutterolf, Willem G. M. van der Bilt, Emilie E. E. Hooft, Timothy H. Druitt, Florian Schmid, Jan Magne Cederstrom, Christian Huebscher, Paraskevi Nomikou, Steven Carey, Michel Kuehn, Judith Elger, Christian Berndt
Summary: In this study, seismic reflection and P-wave tomography datasets were integrated with computed tomography-derived sedimentological analyses to estimate the volume of the iconic Minoan eruption. The results revealed a total eruption volume of 34.5 +/- 6.8 km(3), with different proportions of tephra fall deposits, ignimbrites, intra-caldera deposits, and lithics. These volume estimates were consistent with an independent caldera collapse reconstruction. The findings demonstrate the importance of complementary geophysical and sedimentological datasets for reliable eruption volume estimates and volcanic hazard assessments.
NATURE COMMUNICATIONS
(2023)