Review
Geosciences, Multidisciplinary
Allan Silva Gomes, Paulo Marcos Vasconcelos
Summary: Constraining the timing of large igneous provinces is crucial for evaluating their petrogenetic evolution and potential links to mass extinctions. The Parana-Etendeka continental flood basalts erupted during the Early Cretaceous, lasting approximately 1.6-3.0 million years and possibly temporally connected to the Weissert event.
EARTH-SCIENCE REVIEWS
(2021)
Review
Astronomy & Astrophysics
Stephen Self, Tushar Mittal, Gauri Dole, Loyc Vanderkluysen
Summary: Large igneous provinces (LIPs) are significant volcanic events in Earth's history that have impacted ecosystems and caused mass extinctions. The Deccan Traps in the Cretaceous-Paleogene era serve as an archetype for understanding eruption rates, styles, and vent locations of LIP lava flows. By studying the Deccan flows, a unified conceptual model for erupting voluminous LIP lavas with large spatial extent can be established. The Deccan Traps provide insights into open questions and challenges regarding the eruption and flow mechanisms of LIP lavas.
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES
(2022)
Article
Geochemistry & Geophysics
Michelle L. Foley, Benita Putlitz, Lukas P. Baumgartner, Emiliano M. Renda, Alexey Ulianov, Guillaume Siron, Massimo Chiaradia
Summary: Studying the zircon in volcanic rocks of Patagonia can provide insights into the geochemical and isotopic differences of potential magmatic sources, the crustal reservoirs that contributed to felsic magmas during anatexis, and the contributions of these sources. The results show that the zircon in the studied volcanic units have distinct oxygen and hafnium isotope compositions, indicating different sources for the magmas. The findings suggest that the interaction between a high heat flux environment and a fertile metasedimentary crust played a key role in generating the felsic volcanism.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geochemistry & Geophysics
C. L. Colleps, N. R. McKenzie, W. R. Guenthner, M. Sharma, T. M. Gibson, D. F. Stockli
Summary: The volcanic eruptions and subsequent weathering of the Deccan Traps in India are believed to have played a significant role in global climate change. Utilizing low-temperature apatite (U-Th)/He thermochronology, researchers have been able to determine the impact of volcanic activity on the Earth's surface environment and establish new constraints on the northern extent of the Deccan Traps.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Rohit Pandey, N. V. Chalapathi Rao, Mahendra K. Singh, Debojit Talukdar
Summary: This comprehensive review discusses the alkaline rocks from the Deccan Large Igneous Province (DLIP), including their association with the Deccan Traps, petrography, geochemistry, and geophysical aspects. Alkaline rocks occur in seven sub-provinces with a variety of compositions, and geochronological data reveal a wide duration of magmatic activity. The major mineralogy and geochemical nature of these alkaline rocks are highlighted, along with their source modification by subduction and crustal contamination.
JOURNAL OF EARTH SYSTEM SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Shilpa Patil Pillai, Kondepudi Pattabhiram, Gauri Dole, Priyanka Shandilya, Devdutt Upasani, Kanchan Pande, Vivek S. Kale
Summary: The Bhetkheda-Mohana Lineament is traced across nearly 100 km in the central Narmada valley, primarily occupied by a basaltic dyke with segments represented by a regional fracture/shear/fault zone.
JOURNAL OF EARTH SYSTEM SCIENCE
(2022)
Article
Geochemistry & Geophysics
Josua J. Pakulla, Mike W. Jansen, Raymond A. Duraiswami, Purva Gadpallu, Jonas Tusch, Carsten Jentzsch, Ninja Braukmueller, Frank Wombacher, Carsten Muenker
Summary: The Deccan Volcanic Province (DVP) in India, which covers a large area, has recorded about five million years of volcanic activity. Previous studies have shown that DVP basalt has a common isotopic signature, which is best explained by a mixture of early Reunion plume-related melts and depleted upper mantle melts. This new study provides further insight into the DVP's magma-plumbing system and suggests that it may be more complex than previously thought.
Article
Geochemistry & Geophysics
Allan Silva Gomes, Paulo Marcos Vasconcelos, Teresa Ubide, Eleonora Maria Gouvea Vasconcellos
Summary: The high-Ti Paranapanema sequence in the Parana Large Igneous Province is characterized by a series of pahoehoe lava flows, some of which contain unique mafic segregation structures. The study of two pegmatite occurrences and their host basalts reveals that the pegmatites are more fractionated and enriched in various elements compared to the enclosing lavas. Additionally, age differences observed in plagioclase phenocrysts from the pegmatites and whole-rock fragments from the enclosing lavas are likely due to hydrothermal alteration rather than differences in crystallization age.
Article
Geosciences, Multidisciplinary
Caroline Lotout, Aphrodite Indares, Jeffrey Vervoort, Etienne Deloule
Summary: The high-P rocks in the Grenville Province are crucial puzzle pieces for understanding Mesoproterozoic geodynamics and deep crustal processes. The diversity and diachronicity of the high-P domains in this province are highlighted in this publication.
PRECAMBRIAN RESEARCH
(2023)
Article
Geochemistry & Geophysics
Teal R. R. Riley, Ian L. L. Millar, Andrew Carter, Michael J. J. Flowerdew, Alex Burton-Johnson, Joaquin Bastias, Craig D. D. Storey, Paula Castillo, David Chew, Martin J. J. Whitehouse
Summary: The LeMay Group accretionary complex in Alexander Island consists of deformed turbidites and thrust slices of ocean floor basalts. The age and provenance of this complex are uncertain, ranging from Carboniferous to Cretaceous. The accretion history is poorly established, but our geochronology and geochemistry analysis suggests its deposition, provenance, and accretion occurred during the Permian to mid-Triassic, mid-Cretaceous, and Early Jurassic respectively.
Article
Geochemistry & Geophysics
Jyoti Sharma, M. Ravi Kumar, Ketan Singha Roy, S. K. Pal, P. N. S. Roy
Summary: The study revealed the presence of intracrustal layers, lid, and a low-velocity zone (LVZ) in the northwestern Deccan volcanic province, showing anisotropic and isotropic variations. The LVZ, which is a negative anomaly, may be related to partial melts, volatile materials, or a thermal anomaly.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Jennifer Kasbohm, Blair Schoene, Darren F. Mark, Joshua Murray, Stephen Reidel, Dawid Szymanowski, Dan Barfod, Tiffany Barry
Summary: This study presents a detailed chronology of eruptions in the Columbia River Basalt Group (CRBG) using high-precision dating methods, which contributes to the understanding of the connection between volcanic activity and climate change during the Miocene Climate Optimum. The findings show a significant overlap between the main eruption phase of the CRBG and the highest sustained warmth of the MCO in astronomical records.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Berthold Ottens, Ralf Schuster, Zsolt Benko
Summary: Secondary minerals in Salsette Island show remarkable differences in terms of mineral speciation and precipitation sequence due to their unique geological environment.
Article
Geosciences, Multidisciplinary
Vladislav S. Shatsky, Alexey L. Ragozin, Qin Wang, Meiqian Wu
Summary: The Siberian craton, one of the largest Precambrian cratons in the world, can only provide limited geochronological data due to its coverage by younger sedimentary deposits. However, the xenoliths from various volcanic pipes and basalts in the region offer insights into the composition and evolution of the craton's crust. The available isotopic and geochemical data reveal that the Anabar tectonic province of the Siberian craton lacks age stratification, consisting of reworked Paleoarchean rocks and juvenile Proterozoic rocks at all crustal levels. Therefore, a detailed geochronological study of crustal xenoliths in the kimberlite pipes is necessary.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
S. P. Regan, M. L. Williams, L. Zieman, J. R. Chiarenzelli, M. J. Jercinovic, B. L. Cousens, J. R. Webber, L. B. Aspler
Summary: IN-SIMS micro-zircon geochronology has determined the age of the Chipman and Kazan mafic dike swarms in the Snowbird Tectonic Zone. The study reveals that these dikes were formed around 2.113 billion years ago, similar to other mafic complexes in the western Churchill Province. The geochemical analysis also suggests contamination of the Kazan dikes by metasomatized lithospheric root.
PRECAMBRIAN RESEARCH
(2022)
Article
Geochemistry & Geophysics
B. S. Ellis, D. Szymanowski, C. Harris, P. M. E. Tollan, J. Neukampf, M. Guillong, E. A. Cortes-Calderon, O. Bachmann
Summary: This study focuses on the low-temperature post-eruptive processes that can remove lithium from volcanic glass and generate lithium-rich fluids. Through analysis of samples, it was found that these surficial processes occurring after volcanic eruption can provide sufficient lithium to form economic deposits. Most of the hydration occurs during the rapid cooling period shortly after volcanic eruption, with temperatures ranging from 40 to 70 degrees Celsius.
Article
Geosciences, Multidisciplinary
Grzegorz Rackim, Stanislaw Mazur, Katarzyna Narkiewicz, Agnieszka Pisarzowskal, Waldemar Bardzifiskil, Katarzyna Koltonik, Dawid Szymanowski, Pawel Filipiakl, Barbara Kremer
Summary: This article describes a tephra-rich cherty-clayey Famennian succession in the Bardo Mountains in the Sudetes of Poland, which preserves the record of a lost ocean that was later incorporated into the Variscan orogenic belt. The study reveals the interplay between biosiliceous and siliciclastic deposition in the oceanic basin, influenced by fluctuating but mostly oligotrophic regimes and weak up-welling. It also identifies the presence of Hangenberg Black Shale and provides insights into the tectonic processes and volcanic activity in the region.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geology
Liam O'Connor, Dawid Szymanowski, Michael P. Eddy, Kyle M. Samperton, Blair Schoene
Summary: This study examines the sources and characteristics of silicic magmas by analyzing zircons deposited in weathered Deccan lava flow tops. The results show the existence of undiscovered or understudied volcanic centers within the Deccan LIP that do not match the characteristics of the red bole zircons.
Article
Multidisciplinary Sciences
Tinghong Zhou, John A. Tarduno, Francis Nimmo, Rory D. Cottrell, Richard K. Bono, Mauricio Ibanez-Mejia, Wentao Huang, Matt Hamilton, Kenneth Kodama, Aleksey Smirnov, Ben Crummins, Frank Padgett
Summary: Paleomagnetism is used to understand the origin of inner core structure by determining when crystallization started. The study reveals that inner core nucleation began approximately 550 million years ago, and the growth of the inner core to 50% of its current radius occurred around 450 million years ago. Additionally, the seismic anisotropy of the outermost inner core reflects a global deep mantle structure that has persisted to the present day.
NATURE COMMUNICATIONS
(2022)
Article
Geochemistry & Geophysics
N. B. Baumann, B. S. Ellis, E. A. Cortes-Calderon, D. Szymanowski, C. Harris, O. Bachmann
Summary: Many volcanoes display transitions between explosive and effusive eruptive styles, which have different implications for hazard assessments. In this study, the lavas and ignimbrites of the Miocene Fataga Group on Gran Canaria were investigated. The ignimbrites contain crystal-poor juvenile pyroclasts and crystal-rich juvenile clasts, while the lavas are almost phenocryst-free. Despite their textural differences, the lavas have similar geochemical compositions to the crystal-poor juveniles in the ignimbrites. The lavas are interpreted to originate from peripheral magmatic pockets, which may pose underappreciated volcanic hazards worldwide.
Article
Geology
Lisa Zieman, Mauricio Ibanez-Mejia, Alan D. Rooney, Elias Bloch, Natalia Pardo, Blair Schoene, Dawid Szymanowski
Summary: The thermal and compositional structure of arcs play a significant role in magmatic differentiation and lower-crustal foundering, which affect the evolution of the continental crust. This study focuses on the Andean Northern Volcanic Zone and utilizes direct petrologic observations and U-Pb dating of zircons to constrain the properties of the lower crust and mantle. The results reveal the presence of a high-density lithospheric root and suggest the potential role of partial melts in the hot arc root in preventing or slowing down foundering.
Article
Geosciences, Multidisciplinary
Mihovil Brlek, Simon Richard Tapster, Julie Schindlbeck-Belo, Sean P. Gaynor, Steffen Kutterolf, Folkmar Hauff, Svetoslav V. Georgiev, Nina Trinajstic, Sanja Suica, Vlatko Brcic, Kuo-Lung Wang, Hao-Yang Lee, Christoph Beier, Adam B. Abersteiner, Ivan Misur, Irena Peytcheva, Duje Kukoc, Bianka Nemeth, Mirka Trajanova, Drazen Balen, Marcel Guillong, Dawid Szymanowski, Reka Lukacs
Summary: The Carpathian-Pannonian Region (CPR) experienced large silicic volcanic eruptions during the Early and Middle Miocene. By studying the eruption chronology and petrogenesis of rhyolitic ignimbrites and pyroclastic fall deposits, it was found that the eruptions at 18.1 Ma and 17.3 Ma produced widespread caldera-forming rhyolitic ignimbrites and ash deposits in the northern and southwestern CPR. The compositions of volcanic glass shards suggest complex magmatic systems during the eruptions, and isotopic changes indicate variations in the interaction between mantle-derived magmas and crustal components during lithospheric thinning of the Pannonian Basin.
Article
Multidisciplinary Sciences
John A. Tarduno, Rory D. Cottrell, Richard K. Bono, Nicole Rayner, William J. Davis, Tinghong Zhou, Francis Nimmo, Axel Hofmann, Jaganmoy Jodder, Mauricio Ibanez-Mejia, Michael K. Watkeys, Hirokuni Oda, Gautam Mitra
Summary: The researchers report paleointensity data from ancient single detrital zircons containing primary magnetite inclusions, which indicate a nearly identical pattern of paleointensities from about 3.9 billion years ago to about 3.3 billion years ago. This suggests that there was a period of unvarying latitudes on Earth during this time, which is distinct from plate tectonics in the past 600 million years but consistent with predictions of stagnant-lid convection.
Article
Geochemistry & Geophysics
Dawid Szymanowski, Francesca Forni, Marcus Phua, Brian Jicha, Daniel W. J. Lee, Ying-Jui Hsu, Hamdi Rifai, Blair Schoene, Caroline Bouvet de Maisonneuve
Summary: Multiple geochemical tools were applied to study the Toba caldera complex in Sumatra, Indonesia. The study provided revised eruption ages and detailed magma geochemistry information. However, identifying the behavior patterns of the Toba system and making predictions about its future development based on geochemistry remain challenging.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Jennifer Kasbohm, Blair Schoene, Darren F. Mark, Joshua Murray, Stephen Reidel, Dawid Szymanowski, Dan Barfod, Tiffany Barry
Summary: This study presents a detailed chronology of eruptions in the Columbia River Basalt Group (CRBG) using high-precision dating methods, which contributes to the understanding of the connection between volcanic activity and climate change during the Miocene Climate Optimum. The findings show a significant overlap between the main eruption phase of the CRBG and the highest sustained warmth of the MCO in astronomical records.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Eliel S. C. Anttila, Francis A. Macdonald, Dawid Szymanowski, Blair Schoene, Andrew Kylander-Clark, Clara Danhof, David S. Jones
Summary: Understanding carbon transfer between Earth's surface reservoirs is crucial for interpreting climate transitions and predicting future climate change. This study examines volcanic ash beds in the Monterey Formation along the Santa Barbara coast to understand the timing and tempo of organic carbon accumulation. The findings demonstrate that organic carbon accumulation peaks do not align with the globally-observed Monterey Event, suggesting that organic carbon burial in the Monterey Formation is a response to, rather than a driver of, global climate.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Heather M. Kirkpatrick, T. Mark Harrison, Mauricio Ibanez-Mejia, Francois L. H. Tissot, Scott A. MacLennan, Elizabeth A. Bell
Summary: We conducted Zr isotope measurements on various minerals and rocks from the La Posta pluton in southern California to investigate the factors affecting Zr isotope fractionation in igneous rocks. We observed significant Zr isotope fractionation between titanite and zircon, which suggests that the relative order of phase appearance on the liquidus plays a role in Zr isotope evolution. However, factors such as crystallization order, temperature, and co-crystallizing phases do not fully explain the intracrystalline Zr isotopic distribution in zircons or the wide range of Zr isotopic values among zircons.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Lorenzo Tavazzani, Jorn-Frederik Wotzlaw, Rita Economos, Silvano Sinigoi, Gabriella Demarchi, Dawid Szymanowski, Oscar Laurent, Olivier Bachmann, Cyril Chelle-Michou
Summary: The emplacement history and thermal evolution of subvolcanic magma reservoirs have been studied through quantitative analysis of zircon age distributions. The research shows that changes in zircon composition and age heterogeneity can differentiate different types of magmatic processes. The quantitative analysis of dispersed zircon crystallization age distributions obtained with high-precision techniques provides a new tool to investigate the properties and storage conditions of silicic magma reservoirs.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Multidisciplinary Sciences
Lorenzo Tavazzani, Joern-Frederik Wotzlaw, Rita Economos, Dawid Szymanowski, Oscar Laurent, Olivier Bachmann, Cyril Chelle-Michou
Summary: In the last decade, advancements in zircon U-Pb geochronology techniques have improved our understanding of the crystallization histories of zircon in magmatic rocks. Previous studies have been limited in reproducing the effect of thermal histories on zircon ages. This study presents a refined thermodynamics-based zircon saturation model to predict the distribution of zircon ages in silicic magma reservoirs experiencing open-system processes, allowing for a better understanding of the thermo-mechanical history of these systems.
Article
Geochemistry & Geophysics
Lingyu Zhang, Kristoffer Szilas
Summary: This study presents new petrological and geochemical data for the Narssaq Ultramafic Body (NUB) in the Itsaq Gneiss Complex of SW Greenland. The results indicate that the ultramafic rocks of NUB are not mantle residues, but instead represent crustal cumulates derived from high-Mg magmas.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Rong Xu, Sarah Lambart, Oliver Nebel, Ming Li, Zhongjie Bai, Junbo Zhang, Ganglan Zhang, Jianfeng Gao, Hong Zhong, Yongsheng Liu
Summary: This study investigated the iron isotope compositions of Cenozoic basalts in Southeast China, finding significant variations related to different types of basalts and their respective sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
C. J. Ebinger, Miriam C. Reiss, Ian Bastow, Mary M. Karanja
Summary: The East African rift system is formed above mantle upwellings and the formation of rifts is related to lithospheric thinning and magmatic activity. The amount of splitting varies spatially and the fast axes are predominantly parallel to the orientation of the rifts. Thick lithospheric modules have less splitting and different orientations, which may indicate mantle plume flow. Splitting rotates and increases in strength as it enters the rift zones, suggesting that the anisotropy is mainly present at shallow depths.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Correction
Geochemistry & Geophysics
Ekaterina Rojas-Kolomiets, Owen Jensen, Michael Bizimis, Gene Yogodzinski, Lukas Ackerman
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Robert W. Nicklas, Igor S. Puchtel, Ethan F. Baxter
Summary: Oxygen fugacity is a fundamental parameter for understanding redox processes in igneous systems. This study compares the Fe-XANES oxybarometry method with the V-in-olivine method for evaluating fO(2) in MORB lavas. The results show that the V-in-olivine method is not applicable to samples with low MgO content, and that the majority of Archean komatiite sources have lower fO(2) than modern MORB.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Chunfei Chen, Stephen F. Foley, Sebastian Tappe, Huange Ren, Lanping Feng, Yongsheng Liu
Summary: The volatile components CO2 and H2O play a major role in mantle melting and heterogeneity. In this study, Ca isotopes were used to trace the lithological heterogeneity in alkaline magmatic rocks. The results revealed the presence of K-richterite and carbonate components as the source of alkaline magmas with low delta 44/40Ca values. These findings highlight the importance of Ca isotopes as a robust tracer of lithological variation caused by volatiles in the Earth's upper mantle.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Timothee Jautzy, Gilles Rixhon, Regis Braucher, Romain Delunel, Pierre G. Valla, Laurent Schmitt, Aster Team
Summary: Although the current approach to estimate catchment-wide denudation rates using only 10Be concentrations has made significant progress in geomorphology, this study argues for the inclusion of 26Al measurements and testing of steady-state assumptions in slow eroding, formerly glaciated landscapes. The study conducted measurements of both 10Be and 26Al in stream sediments from the Vosges Massif in France and found that elevation, slope, channel steepness, and precipitation were the primary factors controlling denudation rates. The study also revealed a significant relationship between the extent of past glaciation and the cosmogenic (un-)steadiness in the stream sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Erik van der Wiel, Douwe J. J. van Hinsbergen, Cedric Thieulot, Wim Spakman
Summary: Numerical models of Earth's mantle dynamics can predict the vigour and mixing of mantle flow, and the average slab sinking rates are an unexplored parameter that can provide intrinsic information on these characteristics. Through numerical experiments, it has been found that slab sinking rates are strongly correlated with mantle convection and mixing, and may explain geochemical observations from hotspot volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
