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Revisiting the discrimination and distribution of S-type granites from zircon trace element composition Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-12 Nick M W Roberts, Chris Yakymchuk, Christopher J Spencer, C. Brenhin Keller, Simon R Tapster
Trace element compositions of zircon can be used to estimate the chemistry of their host magmas; as such they provide a useful tool in zircon provenance, and in the assessment of changing magma chemistries in time and space. Granites derived from the melting of sedimentary protoliths (S-types) have previously been discriminated by their P contents and P vs. REE+Y correlations, largely based on data
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Noble gas migration in silica polymorphs at Earth's mantle conditions Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-10 Sarah Figowy, Chris Erik Mohn, Razvan Caracas
The diffusion of noble gases in SiO phases is studied using molecular dynamics based on the density functional theory, covering pressure and temperature conditions from the crust to the core. Our results show that the diffusion of noble gases in SiO minerals is not only controlled by external conditions such as temperature and pressure but is also highly sensitive to the structure of the host mineral
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How old are lunar lobate scarps? 2. Distribution in space and time Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-09 Jaclyn D Clark, Carolyn H. van der Bogert, Harald Hiesinger
Based on their fresh morphology, lunar lobate scarps are thought to be some of the youngest landforms on the Moon. Age estimates using crater degradation measurements on craters cut or supposed by the scarps revealed that such lobate scarps formed in the last ∼700 Ma. Modern crater size-frequency distribution (CSFD) measurements provide a new method for investigating scarp formation ages, which we
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Spatiotemporal variations in formation conditions of cryogenic brines: Insights from aragonite cements in New Harbor, western Ross Sea, Antarctica Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-08 Mingyu Yang, Tracy D. Frank, Christopher R. Fielding, Biao Chang
Cryogenic-brine precipitated carbonates (cryogenic-brine carbonates) have proven to be a valuable proxy for tracing the origin, nature, and distribution of Cenozoic brines that reside beneath McMurdo Sound (MMS) and adjacent McMurdo Dry Valleys (MDV), Antarctica. Of particular significance is the predominance of cryogenic-brine aragonite cements found in several stratigraphic sections in this region
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Barium isotopes in stromatolites through deep-time: A novel tracer for metal cycling in the photic zone Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-07 Simon V. Hohl, Yi-Bo Lin, Hai-Zhen Wei, Guang-Yi Wei, Sebastian Viehmann
In the search for reliable archives to reconstruct Earth's paleo-surface ocean chemistry, stromatolites have gained much attention in the past decade. Stromatolitic carbonates, i.e., lithified microbial mats, form in shallow neritic environments and have the unique potential to record the ambient water chemistry of the photic zone. Their wide occurrence in shallow marine sedimentary successions from
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Phanerozoic biological reworking of the continental carbonate rock reservoir Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-06 Craig R. Walton, Oliver Shorttle
Understanding the co-evolution of complex life with Earth's geology is an enduring challenge. The rock record evidences remarkable correlations between changes in biology and the wider Earth system, yet cause and effect remain unclear. Here, we link the evolutionary history of eukaryotes with the rise and fall of carbonate rock fraction within continental crust – a key variable in controlling the efficiency
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Permeability and seismicity rate changes at an inflating submarine volcano caused by dynamic stresses Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-06 Adnan Barkat, Yen Joe Tan, Guangyu Xu, Felix Waldhauser, Maya Tolstoy, William S.D. Wilcock
Transient stresses from the passage of seismic waves are known to trigger earthquakes and cause crustal permeability changes. However, whether permeability change is a main driver of dynamic earthquake triggering remains debated. Our understanding of the characteristics of dynamic triggering in submarine volcanic environments is also limited due to the lack of offshore observations. Here, we utilize
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A recipe for making potassium-rich magmas in collisional orogens: New insights from K and Fe isotopes Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-05 De-Hong Du, Xiang-Long Luo, Xiao-Lei Wang, Martin R. Palmer, E.Yalçın Ersoy, Weiqiang Li
Ultrapotassic volcanism commonly occurs following calc-alkaline magmatism in continental collisional tectonic zones, but some key aspects of this transition remain ambiguous. In particular, there are uncertainties regarding the changing nature of the mantle source and the contribution of recycled continental material during the petrogenesis of ultrapotassic igneous rocks. Here, we show that the calc-alkaline
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Declining magma supply to a poroelastic magma mush explains long-term deformation at Soufrière Hills Volcano Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-04 Rami Alshembari, James Hickey, Karen Pascal, Racquel Syers
Volcano deformation studies traditionally consider melt-dominated magma reservoirs, often overlooking the significant role of poroelastic mush in modifying surface deformation. Here, we analyze the deformation of Soufrière Hills Volcano (SHV) with a focus on a mush-dominated, poroelastic magma reservoir, drawing on temporal deformation data from 14 continuous GPS stations during the ongoing intra-eruptive
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Influence of magma flux on magma storage depths along the Reykjanes Ridge Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-04 R.J.M. Baxter, J. Maclennan
Quantitative thermomechanical models of mid-ocean ridge magmatic systems focus on spreading rate variations as the principal control on crustal thermal structure and the distribution of melt storage. The Reykjanes Ridge (RR), a slow-spreading portion of the Mid-Atlantic Ridge, has a near-constant spreading rate, but crustal thickness varies by a factor of two. Therefore, magma flux to the ridge varies
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Linking carbon cycle perturbations to the Late Ordovician glaciation and mass extinction: A modeling approach Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-02 Junpeng Zhang, Chao Li, Yangyang Zhong, Xuejin Wu, Xiang Fang, Mu Liu, Daizhao Chen, Benjamin C. Gill, Thomas J. Algeo, Timothy W. Lyons, Yuandong Zhang, Hui Tian
The Hirnantian Stage of the Late Ordovician coincides with a positive carbon isotope excursion (HICE, ∼+6 ‰), a major glaciation, increased volcanic activity, expanded marine anoxia, and one of the largest mass extinctions of the Phanerozoic. The origin of the HICE is debated, with proposed mechanisms favoring enhanced low-latitude carbonate weathering and/or increased efficiency of organic carbon
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Determining the initiation of shear zone deformation using titanite petrochronology Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-02 Claire O. Harrigan, Sarah F. Trevino, Mark D. Schmitz, Basil Tikoff
We present an integrative petrochronological approach to dating the initiation of shear zone deformation in granitic rocks, using the mineral titanite (CaTiSiO). This method is suited to granitoid-hosted shear zones in continental arc settings, where the interplay between tectonics, magmatism, and deformation is actively debated. Microstructural observations including crystallographic misorientations
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Garnet zoning patterns record multiple processes of chemical transfer during subduction Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-03-02 Freya R. George, Daniel R. Viete, Janaína Ávila, Gareth G.E. Seward, George L. Guice, Mark B. Allen, Michael J. Harrower
Subduction is the principal mechanism by which volatiles are transferred from the Earth's surface to its interior. In garnets from eclogites and blueschists formed within the subduction setting, fine-scale, oscillatory elemental zoning is a common feature, sometimes considered to record open-system fluid exchange during prograde metamorphism. We present oxygen isotope data for garnets with such zoning
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Effect of the liquid-vacuum transition on the relative abundances of amino and fatty acids sought as biosignatures on icy ocean worlds Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-23 Marc Neveu, Alexandria Aspin, Mariam Naseem, Ziming Yang
Interpreting measurements by robotic missions searching for signs of life in material erupted by cryovolcanic ocean worlds (e.g., Enceladus, Europa, Ceres) requires linking the composition of this material to that of its subsurface liquid source. Irrespective of the properties of –and processes along– the path of ejection, material erupted on airless worlds undergoes a transition from liquid to vacuum
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The role of fault structural evolution on long-term slip rates and seismic cycles in the Himalayan orogenic wedge Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-19 Sharadha Sathiakumar, Sylvain Barbot, Judith Hubbard
The collision between the Indian and Eurasian plates drives tectonic uplift and evolving landscapes over geological time scales. Much of this evolution is accommodated by seismic processes. However, the relationship between long-term geological processes and short-term seismic cycles is challenging to unravel because of their disparate spatial and temporal scales. Here, we investigate the impact of
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Dating fossil lower-crustal earthquakes by in-situ apatite U-Pb geochronology Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-19 Sascha Zertani, Luca Menegon, Martin J. Whitehouse, Heejin Jeon, Bjørn Jamtveit
Determining the precise age of fossil earthquakes is essential for understanding the tectonic setting in which they occurred. Pseudotachylytes are quenched frictional melts that occur along coseismic fractures and represent evidence of fossil earthquakes in the rock record. Here, we present the first in-situ apatite U-Pb ages for three samples from Lofoten in the northern Norwegian Caledonides, that
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Geodetic signature of a weak Lithosphere-Asthenosphere Boundary in postseismic deformation of large subduction earthquakes Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-17 Tianhaozhe Sun, Kelin Wang, Jiangheng He
The rheology of the seismically imaged Lithosphere-Asthenosphere Boundary (LAB) is an important new question in plate tectonics. If the LAB is associated with ponding of partial melts as inferred from many seismic studies, it should have a low viscosity that minimizes resistance to plate motion and subduction. Here, we propose that recently observed postseismic enhanced landward motion (ELM) in coastal
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Cenozoic stable isotope constraints on the Eurasian continental interior hydroclimate response to high CO2 Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-17 Ellie Driscoll, Michael R. Needham, Patrick W. Keys, Jeremy K.C. Rugenstein
The response of the terrestrial hydrologic cycle to higher atmospheric CO remains poorly constrained, largely due to difficulty in predicting how land surface processes may modify individual hydroclimate parameters such as precipitation (P), evapotranspiration (ET), and runoff (q). To interrogate how the terrestrial hydrologic cycle may change with warming and higher CO, we utilize the Cenozoic geologic
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Impact of mantle convection and dynamic topography on the Cenozoic paleogeography of Central Eurasia and the West Siberian Seaway Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-17 Eivind O. Straume, Bernhard Steinberger, Thorsten W. Becker, Claudio Faccenna
The West Siberian Seaway connected the Tethys to the Arctic Ocean in the Paleogene and played an important role for Eurasian-Arctic biogeography, ocean circulation, and climate. However, the paleogeography and geological mechanisms enabling the seaway are not well constrained, which complicates linking the seaway evolution to paleoenvironmental changes. Here, we investigate the paleogeography of the
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Rapid removal and replacement of dissolved organic matter during circulation through ultramafic crust Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-14 Susan Q. Lang, Bryan Benitez-Nelson, Malayika Vincent, Ronald Soong, Flavio V.C. Kock, Daniel H. Lysak, Amy Jenne, André J. Simpson
Large volumes of seawater have passed through the rocky subseafloor throughout Earth's history. The scale of circulation is sufficiently large to impact the cycling of marine dissolved organic carbon (DOC), one of the largest pools of reduced carbon on Earth whose sources and sinks remain enigmatic, and to sequester carbon over geologic timescales. While the fate of DOC in numerous mafic systems has
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Composition of Earth's initial atmosphere and fate of accreted volatiles set by core formation and magma ocean redox evolution Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-14 Jesse T. Gu, Bo Peng, Xuan Ji, Jisheng Zhang, Hong Yang, Susana Hoyos, Marc M. Hirschmann, Edwin S. Kite, Rebecca A. Fischer
The origins of volatile depletion in the Bulk Silicate Earth (BSE) remain controversial due to the numerous processes during accretion and differentiation that can alter volatile abundances. Here, we integrate realistic impact histories from -body simulations to determine the distribution of H, C, and N between Earth's core, mantle, and atmosphere, including loss to space, during the giant impact stage
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Formation of lithium-rich pegmatites via rapid crystallization and shearing – case study from the South Tibetan Detachment, Himalaya Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-13 Xiao-Chi Liu, Matthew J. Kohn, Jia-Min Wang, Shao-Xiong He, Ru-Cheng Wang, Fu-Yuan Wu
Lithium is a key strategic metal with important reserves in pegmatites. However, the formation processes of Li-pegmatites remain doubtful, as most previous models are either qualitative or require large numbers of cyclic fractionation-extraction events that have little direct field evidence. Here, we propose that highly Li-enriched melts in the Himalaya may separate via an unusual combination of rapid
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δ142Ce minus δ146Nd value as a redox indicator in Earth's surface environments Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-13 Jianghao Bai, Chao Wu, Hao Wu, Zhibing Wang, Le Zhang, Songxiong Zhong, Jinlong Ma, Gangjian Wei
Stable Ce isotope ratios are considered potential indicators for tracing the redox state of Earth's surface; however, their quantitative relationship remains undefined. Here, we investigated the influences of both redox and non-redox processes on stable Ce isotope fractionation in a terrestrial environment by analyzing the weathering products, selective soil chemical extracts, and parent materials
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Seismo-turbidites reveal locations of major earthquakes during the past millennium in the Gulf of Aqaba, southern Dead Sea Fault Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-09 Zeynep Bektaş, Ulaş Avşar, Matthieu Ribot, Yann Klinger, Sigurjón Jónsson
Although ample historical and paleoseismological information is available on major past earthquakes along the onland part of the Dead Sea Fault, knowledge of the seismic behavior of its southernmost part in the Gulf of Aqaba has remained limited. To fill this gap and improve our understanding of the seismic potential of the submarine faults in the gulf, we analyzed 18 sediment cores ranging in length
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Interaction between ice sheet dynamics and sea surface characteristics in the Labrador Sea during the last 50 ka Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-08 Defang You, Ruediger Stein, Kirsten Fahl, Audrey Limoges, Enno Schefuß
The study of the history of ice sheet retreat provides important insights into the interaction between ice sheets and oceans, especially under a sustained warming climate. The decay of ice sheets may affect the surrounding ocean environment, and changes in sea surface conditions can, in turn, affect the ice sheet stability. However, interactions between ice sheet dynamics and sea surface characteristics
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Primordial and recycled noble gases in the Cook-Austral HIMU mantle: Insights into the onset of volatile subduction Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-08 Xinmu J. Zhang, Rita Parai, John C. Lassiter
Ocean island basalts (OIBs) sample multiple distinctive geochemical reservoirs in the mantle and provide rich information on the generation and preservation of mantle compositional heterogeneities. Cook-Austral OIBs with HIMU (high-μ, where μ=U/Pb) signatures tap into a mantle reservoir that hosts ancient altered oceanic crust recycled to the deep mantle via plate tectonics as well as a less degassed
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Insights into the environment surrounding the subduction megathrust using teleseismic P-to-S and P-to-P scattered phases Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-06 Michael Everett Mann, Geoffrey A. Abers, Patrick M. Fulton
Hydrologic and lithologic variations along the plate interface in subduction zones control the strength and slip behavior of megathrust faults. Many models of plate interface fault slip behavior invoke high pore-fluid pressure to explain the variability in rupture behavior. High pore-fluid pressure can explain apparently high Poisson's ratio (> 0.37, / > 2.2) within a low-velocity zone (LVZ) along
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Ambient noise from the atmosphere within the seismic hum period band: A case study of hurricane landfall Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-03 Qing Ji, Eric M. Dunham
The seismic hum in the ∼20 - 300 s period band is usually explained by the primary mechanism, where ocean infragravity waves exert pressure changes directly on the seafloor. However, there are some indications that atmospheric processes might also contribute to the seismic hum band. Hurricane landfall provides a unique opportunity to investigate the strong seismic ambient noise generated by turbulent
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Spatio-temporal evolution of rift volcanism controlled top-down by a deepening graben Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-31 Gaetano Ferrante, Eleonora Rivalta, Francesco Maccaferri
Volcanism in continental rifts is generally observed to shift over time from the inside of the basin to its flanks and vice versa, but the controls on these switches are still unclear. Here we use numerical simulations of dike propagation to test the hypothesis that the spatio-temporal evolution of rift volcanism is controlled by the crustal stresses produced during the development of the rift basin
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Thermal transient PDC behavior induced by topographic drops: A test case at Mt. St. Helens, USA Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-02 Matteo Trolese, Matteo Cerminara, Guido Giordano, Brittany D. Brand, Nicholas Pollock, Francesca Cifelli, Massimo Mattei
Topography plays an important yet uncertain role in modulating the temporal and spatial evolution of the internal structure of pyroclastic density currents (PDCs). Understanding such changes is critical to characterize PDC transport regimes and their hazard. Here we combine paleomagnetic data from PDC deposits of the 18 May 1980 Mt. St. Helens eruption with numerical outcomes to capture spatio-temporal
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Insights into magma storage depths and eruption controls at Kīlauea Volcano during explosive and effusive periods of the past 500 years based on melt and fluid inclusions Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-02 Allan H. Lerner, D. Matthew Sublett, Paul J. Wallace, Christina Cauley, Robert J. Bodnar
Kīlauea Volcano experiences centuries-long cycles of explosive and effusive eruptive behavior, but the relation, if any, between these eruptive styles and changing conditions in the magma plumbing system remains poorly known. We analyze olivine-hosted melt and fluid inclusions to determine magma storage depths during the explosive-era Keanakākoʻi Tephra eruptions (∼1500–1840 CE) and compare these results
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Highly discrepant Lu–Hf and Sm–Nd dates from crustal xenoliths witness the stability and destruction of a craton Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-01 Hao Cheng, Elias M. Bloch, Evangelos Moulas, Jeffrey D. Vervoort, Wen-Liang Xu, Kai-Yang Du
Cratons are ancient and stable fragments of continental lithosphere that have survived over billions-of-years of Earth's geologic evolution. Although many recent studies have focused on improving our understanding of the mechanisms and dynamics of craton formation and destruction, little is known about the thermal history of cratons following their stabilization and preceding their demise (or ‘decratonization’)
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The frictional strength and stability of spatially heterogeneous fault gouges Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-02-01 Job P.B. Arts, André R. Niemeijer, Martyn R. Drury, Ernst Willingshofer, Liviu C. Matenco
Along-fault lithological heterogeneity is observed in all fault zones that cross-cut compositional layering. Numerical modelling studies on fault rupture nucleation, propagation and arrest often assume that the fault mechanical behaviour is governed by either the rheologically weak phase or by a homogeneous gouge mixture of juxtaposing lithologies. However, the effects of spatial heterogeneity on fault
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Competition or collaboration: Clay formation sets the relationship between silicate weathering and organic carbon burial in soil Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-31 Evan J. Ramos, William J. Larsen, Yi Hou, Sebastian Muñoz, Preston Cosslett Kemeny, Joel S. Scheingross, Marisa N. Repasch, Niels Hovius, Dirk Sachse, Daniel E. Ibarra, Mark A. Torres
Silicate weathering and organic carbon (OC) burial in soil regulate atmospheric CO2, but their influence on each other remains unclear. Generally, OC oxidation can generate acids that drive silicate weathering, yet clay minerals that form during weathering can protect OC and limit oxidation. This poses a conundrum where clay formation and OC preservation either compete or cooperate. Debate remains
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Short-term magma-carbonate interaction: A modelling perspective Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-31 Simone Colucci, Federico Brogi, Gianluca Sottili, Chiara P. Montagna, Paolo Papale
Short-term interaction of magma with crustal carbonates can affect a volcano's eruptive style and drive even low-viscosity magmas toward large explosive eruptions. Only a few studies have focused on short-term magma-carbonate interaction under controlled laboratory conditions and the physical processes behind the experimental observations are still poorly understood. In this work, we present the first
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Bridging the shocked monazite gap- deformation microstructures in natural and laser shock-loaded samples Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-28 A.-M. Seydoux-Guillaume, T. de Resseguier, G. Montagnac, S. Reynaud, H. Leroux, B. Reynard, A.J. Cavosie
Impact-related damage in minerals and rocks provides key evidence to identify impact structures, and deformation of U-Th-minerals in target rocks, such as monazite, makes possible precise dating and determination of pressure-temperature conditions for impact events. Here a laser-driven shock experiment using a high-energy laser pulse of ns-order duration was carried out on a natural monazite crystal
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Autogenic masking of allogenic inputs: Numerical modelling of signal preservation in deep-water fan strata Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-25 Peter M. Burgess, Robert A. Duller
Variations in climate, sea-level and tectonic processes can be recorded in various ways in strata, and recognising and measuring such external signals preserved in strata is an important aspect of deciphering Earth history. Key questions are what type of signals are likely to be preserved; how input signals may be shredded, over-printed or otherwise reduced before preservation, by stochastic or autogenic
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The role of polybaric crystallization in the construction of the Gangdese continental magmatic arc, South Tibet Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-26 Biji Luo, Bing Ruan, Hongfei Zhang, Jiale Song, Wangchun Xu, He Yang, Fabin Pan, Liang Guo
The understanding of storage conditions and evolution processes of igneous rocks is pivotal in unraveling the architecture and dynamics of trans-crustal magmatic systems. Here we combine amphibole major and trace elements compositions, geothermobarometers and chemometry and published whole-rock compositions of the Paleocene-Eocene (65–40 Ma) Gangdese batholith from longitude 85° E to 95° E to discuss
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Acoustic and electrical properties of Fe-Ti oxides with application to the deep lunar mantle Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-26 Anne Pommier, Michael J. Walter, Ming Hao, Jing Yang, Rostislav Hrubiak
The overturn of titanium-rich mantle cumulates has been invoked to explain the structure and dynamics of the Moon. These dense cumulates are stable at the core-mantle boundary (CMB) and could explain field observations inferred from geophysical studies. We report acoustic and electrical experiments on natural ilmenite-rutile aggregates up to 4.5 GPa and 1920 K. Seismic velocities show a weak pressure
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Formation mechanism of drift-moat contourite systems revealed by in-situ observations in the South China Sea Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-23 Yulong Zhao, Zhifei Liu, Yanwei Zhang, Xiaodong Zhang, Pengfei Ma, Xun Yu, Chen Ling, Baozhi Lin, Jingwen Zhang
Contourite drifts are ubiquitous sedimentary features in the world′s oceans, and their formation are usually ascribed to sedimentation from contour currents. However, in-situ observations of contour currents and their associated sedimentary processes were inadequate. Here, we present mooring observation results from a drift-moat contourite system in the South China Sea to gain insight into its sediment
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An almost universal CO2 - CO32− carbon isotope fractionation function for high temperatures Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-21 Paul Petschnig, Max W. Schmidt, Nico Kueter, Gino Sartori, Stefano M. Bernasconi
High-temperature experiments on the CO - carbonate melt and carbonatite - nephelinite melt pairs are used to quantify equilibrium carbon isotope fractionation at conditions of 1 atm, 750–950 °C and 0.3–0.8 GPa, 1170 °C, respectively. Together with available experimental data, all results are within error consistent with a universal CO – CO fractionation function(T in K, valid for >650 °C) that encompasses
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Tectonic controls on melt production and crustal architecture during magma-poor seafloor spreading Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-19 Leila Mezri, Javier García-Pintado, Marta Pérez-Gussinyé, Zhonglan Liu, Wolfgang Bach, Mathilde Cannat
Slow and ultraslow spreading oceanic crust consists of a heterogenous mixture of serpentinised mantle and magmatic rocks. In these environments, both crustal architecture and faulting mode have been attributed to the interplay between magmatism and tectonics. Numerical models have investigated how variations in melt supply influence tectonics. However, how tectonics influences melt production and the
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Shallow carbonate geochemistry in the Bahamas since the last interglacial period Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-16 Stacey Edmonsond, Matthew D. Nadeau, Andrew C. Turner, Ziman Wu, Emily C. Geyman, Anne-Sofie C. Ahm, Blake Dyer, Sergey Oleynik, David McGee, Daniel A. Stolper, John A. Higgins, Adam C. Maloof
The carbon isotope composition (δ13C) of ancient shallow-water carbonates frequently is used to reconstruct changes to Earth's global carbon cycle and to perform chemostratigraphic correlation. However, previous work demonstrates that local banktop processes also exert an important control on shallow carbonate δ13C as well as other isotope systems like δ18O. To effectively interpret ancient δ13C records
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Evolving microstructure during experimental deformation of Maryland diabase Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-13 Katherine Billings, Philip Skemer
Dynamic boundaries comprised of brittle faults and ductile shear zones are an essential feature of Earth-like plate tectonics. The intermixing of mineral phases that have undergone dynamic recrystallization and deform via grain size sensitive creep may be an essential mechanism for maintaining weakness in shear zones over long time intervals. However, the strain and timescales necessary for creating
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Icequake insights on transient glacier slip mechanics near channelized subglacial drainage Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-11 Nathan T. Stevens, Lucas K. Zoet, Dougal D. Hansen, Richard B. Alley, Collin J. Roland, Emily Schwans, Cameron S. Shepherd
Glacier slip modulates sea-level rise. Most slip models assume quasi-equilibrium process dynamics and debris-free basal ice, but observations regularly show debris-rich basal ice sliding under transient external forcings, placing theory and observation in tension. Seismicity generated by slip (icequake activity) provides a window into subglacial dynamics, but basal icequakes are often too sparse to
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Condensate evolution in the solar nebula inferred from combined Cr, Ti, and O isotope analyses of amoeboid olivine aggregates Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-11 Christian A. Jansen, Christoph Burkhardt, Yves Marrocchi, Jonas M. Schneider, Elias Wölfer, Thorsten Kleine
Refractory inclusions in chondritic meteorites, namely amoeboid olivine aggregates (AOAs) and Ca-Al-rich inclusions (CAIs), are among the first solids to have formed in the solar system. The isotopic composition of CAIs is distinct from bulk meteorites, which either results from extreme processing of presolar carriers in the CAI-forming region, or reflects an inherited heterogeneity from the Sun's
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Hayabusa 2 returned samples reveal a weak to null magnetic field during aqueous alteration of Ryugu's parent body Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-09 C. Maurel, J. Gattacceca, M. Uehara
The JAXA Hayabusa 2 mission returned 5.4 g of material from the C-type asteroid Ryugu. The Mn-Cr ages of dolomite in the returned samples indicate that Ryugu's parent body experienced aqueous alteration sometimes between <1.8 and 6.8 Myr after CAI formation. Because this time range overlaps with the lifetime of the solar nebula, we investigate the possibility that magnetite and pyrrhotite, which are
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Variable oxidizing capacity of slab-derived fluids: Insights from Fe and S speciation in glasses from the Troodos Ophiolite Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-09 L.M. Saper, M. Brounce, D. Woelki, R. Cao, G. Bromiley
Oxygen fugacity (ƒO2) varies systematically across tectonic environments. The typically high ƒO2 recorded in arc settings relative to oceanic ridges is attributed to recycling of oxidized materials derived from subducting slabs into regions of the mantle that undergo partial melting. To evaluate further the relationship between ƒO2 and mantle metasomatism, Fe and S X-ray Absorption Near-Edge Structure
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Contrasting Cu isotopes in mid-ocean ridge basalts and lower oceanic crust: Insights into the oceanic crustal magma plumbing systems Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-08 Zongqi Zou, Zaicong Wang, Yi-Gang Xu, Jakub Ciazela, Xia Wang, Stephen Foley, Wei-Qi Zhang, Wei Li, Ming Li, Yongsheng Liu
Magma plumbing systems exert strong controls on the formation and evolution of the oceanic crust during crust accretion. However, plumbing system dynamics based largely on mid-ocean ridge basalts (MORBs) are extremely difficult to constrain because the MORBs are aggregated melts and original information may have been blurred. Copper isotopic compositions of lower crustal gabbroic cumulates effectively
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Lesser Antilles slab reconstruction reveals lateral slab transport under the Caribbean since 50 Ma Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-08 Yi-Wei Chen, Jonny Wu, Saskia Goes
The link between surface tectonic plates and mantle slabs is fundamental for paleo-tectonic reconstructions and for our understanding of mantle dynamics. Many seismic tomography-based studies have assumed vertical slab sinking and projected mantle features to the surface to reconstruct paleo-trench locations or explain tectonic features. Here, we used a slab-unfolding approach that does not require
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The identification of airbursts in the past: Insights from the BIT-58 layer Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-09 Matthias van Ginneken, Ralph P. Harvey, Steven Goderis, Natalia Artemieva, Mark Boslough, Ryoga Maeda, Jérôme Gattacceca, Luigi Folco, Akira Yamaguchi, Corinne Sonzogni, Penelope Wozniakiewicz
Airbursts are estimated to be the most frequent and hazardous type of impact events. Yet, confirmation of these events are elusive, resulting in a major gap in the impact record of Earth. The recent discovery of igneous chondritic spherules produced during a new type of touchdown airburst 430 thousand years (kyr) ago over Antarctica, in which a projectile vapor jet interacts with the Antarctic ice
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Enhanced volcanic activity and long-term warmth in the middle Eocene revealed by mercury and osmium isotopes from IODP Expedition 369 Site U1514 Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-08 Dhongil Lim, Zhaokai Xu, Jihun Kim, Wei Wang, Emma Ownsworth, David Selby, Runsheng Yin, Taesoo Chang
Rapid plate reorganization may have influenced global climate during the Eocene; however, its linkage remains poorly constrained, particularly during the middle Eocene. To elucidate this tectonic–climatic relationship, here, we conducted a comprehensive analysis based on high-resolution mercury (Hg) and osmium (Os) abundance and isotope data obtained from the complete Eocene sedimentary sequence of
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Numerous Tibetan lower-crustal and upper-mantle earthquakes, detected by Sn/Lg ratios, suggest crustal delamination or drip tectonics Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-04 Xiaohan Song, Simon L. Klemperer
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Preservation of Archean mafic lower continental crust worldwide Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-04 Lang Zhao, Neng Jiang, Jinghui Guo, Danqing Liu, Jun Hu, Xiaohui Zhang, Guangyu Huang
Mafic granulite xenoliths found in Archean cratons have generally been inferred to form from post-Archean basaltic underplating, implying that the Archean mafic lower crust was removed perhaps via delamination. Here based on an integrated study of granulite terrain, granulite xenoliths and lower crustal-derived granitoids, we make a compelling case that most of the Tertiary alkali basalt-entrained
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A common isotopic reservoir for amoeboid olivine aggregates (AOAs) and calcium-aluminum-rich inclusions (CAIs) revealed by Ti and Cr isotopic compositions Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-03 Zachary A. Torrano, Conel M.O'D. Alexander, Richard W. Carlson, Jan Render, Gregory A. Brennecka, Emma S. Bullock
Amoeboid olivine aggregates (AOAs) are the most abundant type of refractory inclusions found in most carbonaceous chondrite groups. AOAs are thought to be genetically related to calcium-aluminum-rich inclusions (CAIs) and potential chondrule precursor components, although the precise physical and temporal details of AOA formation and their relationship to other chondritic components remain unclear
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Slab segmentation, anomalous arc volcanism, and giant porphyry copper deposits in Indonesia Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2024-01-02 Jack F. Ward, Gideon Rosenbaum, Teresa Ubide, Mike Sandiford
Most Holocene volcanoes in Indonesia display geochemical and geophysical properties characteristic of formation via mantle wedge metasomatism. However, some volcanoes (Toba, Ungaran, Muriah, Rinjani, Tambora, Sangeang Api, and Batu Tara) are anomalous, showing alkaline geochemical affinities, anomalously violent recent eruptions, and/or positioning above sections of slab generally considered too deep
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Is stress modeling able to forecast intrusions and slip events at Piton de la Fournaise volcano? Earth Planet. Sci. Lett. (IF 5.3) Pub Date : 2023-12-27 Quentin Dumont, Valérie Cayol, Jean-Luc Froger
Widespread evidence indicates that the stress field and the presence of major discontinuities control the magma trajectory and the stability of volcanic edifices. These latter factors affect two major volcanic hazards: eruptions and flank slip events. Here, we use a catalog of 60 intrusions at Piton de la Fournaise (Réunion Island) to document the link between stress inherited from intrusions and slip