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Structural Characterization of the Taltal Segment in Northern Chile Between 22°S and 26°S Using Local Earthquake Tomography

  • &nbsp24 May 2024

Key Points

  • Seismic catalog reveals forearc activity and slab dip variations. Vp anomalies in the oceanic plate are related to mid-depth seismic events

  • Velocity models uncover anomalies in Salar de Atacama and Taltal ridge that might influence seismicity distribution and hydration changes

  • Shallow low Vp/Vs (<1.75) correlate with ore deposits; deep high Vp/Vs (>1.80) suggest fluids and melting for the Lastarria volcanic complex

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Combustion Completeness and Sample Location Determine Wildfire Ash Leachate Chemistry

  • &nbsp21 May 2024

Key Points

  • Stalagmites record past fire activity through changes in inorganic and organic chemistry sourced from ashes

  • Wildfire ash leachate chemistry will aid interpretation of proxy fire data

  • Results show that inorganic chemistry varies with burn severity and sample location, and the pyrogenic biomarker signal is less clear

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Characterizing Natural Hydrogen Occurrences in the Paris Basin From Historical Drilling Records

  • &nbsp21 May 2024

Key Points

  • Natural hydrogen exploration in former oil and gas province

  • Use of the Optical Character Recognition algorithm to optimize processing of a large drilling report database

  • Indices for a potential H2 system (source, migration, trap) in the Paris Basin

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Sphalerite Records Cd Isotopic Signatures of the Parent Rocks in Hydrothermal Systems: A Case Study From the Nayongzhi Zn–Pb Deposit, Southwest China

  • &nbsp19 May 2024

Key Points

  • S isotopic variations caused by Rayleigh fractionation between sulphide and reduced S; Cd isotopic variations inherited from source rocks

  • Zn/Cd ratios and Cd isotopic compositions reveal that Zn and Cd were dominantly derived from basement rocks

  • The Nayongzhi deposit was formed by mixing between metal-rich and reduced sulfur ore-forming fluids

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Morphology‐Dependent Magnetic Properties in Shallow‐Water Ferromanganese Concretions

  • &nbsp16 May 2024

Key Points

  • Magnetic minerals within shallow water Fe-Mn concretions can provide valuable environmental information about their formation

  • Magnetic properties are linked to specific growth patterns in Baltic Sea Fe-Mn concretions

  • Spheroidal and crust/discoidal concretions are dominated by biogenic and pedogenic magnetic phases, respectively

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Sulfide Melt Wetting Properties in Earth's Mantle: New Constraints From Combined 2D and 3D Imaging

  • &nbsp15 May 2024

Key Points

  • The mobility of mattes is enhanced by majoritic garnet at sub-lithospheric depths

  • The combination of 2D and 3D methods improves our understanding of liquid percolation in the Earth's mantle

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Origin of Philippine Sea Basins During Subduction Initiation in the Western Pacific

  • &nbsp14 May 2024

Key Points

  • New dating indicates that a major part of the oldest Philippine Sea Plate basins formed after c. 51 Ma

  • Ocean crust of the oldest Philippine Basins is affected by the Oki-Daito mantle plume

  • Onset of spreading of the West Philippine Basin could have been triggered when the Oki-Daito plume hit the base of preexisting lithosphere

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Delamination Magmatism in Eastern Anatolia: A Geochemical Perspective

  • &nbsp14 May 2024

Key Points

  • During Neo-Tethyan subduction, pyroxenite-bearing domains formed by melt intrusion into the lower lithosphere beneath Eastern Anatolia

  • The pyroxenite-bearing domains resulted in gravitational instabilities and led to the foundering of the lithosphere in the Late Miocene

  • The regional post-collisional volcanics represent the melts derived both from asthenospheric and delaminated lithospheric mantle domains

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Geomagnetic Field Intensity During the First Millennium BCE From Royal Judean Storage Jars: Constraining the Duration of the Levantine Iron Age Anomaly

  • &nbsp13 May 2024

Key Points

  • Archaeomagnetic intensity data from 32 groups of pottery in Israel dated between the 7th and the 1st centuries BCE

  • The second generation of the Levantine Archaeomagnetic Curve (LAC.v.2.0) covering the last three millennia BCE

  • The new data constrain the duration of the Levantine Iron Age Anomaly (LIAA) from 1100 BCE to 550 BCE

Open access

Magmatic Controls on Volcanic Sulfur Emissions at the Iceland Hotspot

  • &nbsp13 May 2024

Key Points

  • Maximum eruptible S contents (ppm S) are estimated for 73 Icelandic eruptions based on melt inclusion data

  • Pre-eruptive S contents are mostly controlled by sulfide saturation during both melting and crustal magmatic differentiation

  • Icelandic basalts often erupt at compositions close to a compositional maximum in sulfide solubility, leading to relatively high S emissions

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The Generic Mapping Tools Version 6

Key Points

  • A new version of the Generic Mapping Tools (GMT) is released
  • A new modern mode, complementing the existing classic mode, greatly simplifies GMT scripting
  • Easy access to remote data sets and advanced animation building facilitate science communication

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The mean composition of ocean ridge basalts

Key points

  • We present a carefully compiled MORB database, unparalleled in size and coverage
  • We rigorously establish the mean composition of MORB

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GPlates: Building a Virtual Earth Through Deep Time

Key Points

  • GPlates is an open-source plate tectonic geographic information system, enabling the interactive manipulation of tectonic reconstructions
  • GPlates enables the building of topological plate models, including plate deformation, and allows the visualization of subsurface volumes
  • GPlates applications include tectonics, geodynamics, basin evolution, orogenesis, resource exploration, paleobiology, and paleoclimate

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