Preprints
Filtering by Subject: Geology
Topology-Preserving Multifractal Exchange Upscaling for Flow and Reactive Transport in Fractured Crystalline Rock
Published: 2026-07-30
Subjects: Geochemistry, Geology
Groundwater flow and radionuclide transport in fractured crystalline rock are governed by multiscale fracture connectivity, heterogeneous hydraulic properties, matrix diffusion, and coupled geochemical processes. Conventional continuum and discrete-fracture models often have difficulty preserving both geometric complexity and transport-relevant connectivity during upscaling. This study presents a [...]
Open at the interface, closed at the core: neutrality claims in AI‑enabled geoscience infrastructure focusing on Africa – The case of Deep‑Time Digital Earth and GeoGPT
Published: 2026-07-25
Subjects: Earth Sciences, Geology
Geological data has become strategic infrastructure for resource assessment, investment negotiation, and economic sovereignty. Remotely hosted big data and Artificial Intelligence (AI) platforms are increasingly promoted for geoscience in the Global South, particularly Africa. Whether such platforms are genuinely geopolitically unaligned, and how this can be verified, has direct implications for [...]
Rapid Fault Leakage Screening for CO₂ Storage Under Uncertainty: Application to a Faulted Miocene Aquifer in the Malay Basin
Published: 2026-07-22
Subjects: Earth Sciences, Geology, Other Engineering, Other Environmental Sciences, Transport Phenomena
Geological CO2 storage is critical for mitigating climate change, yet the risk of leakage along faults poses significant challenges. Faults function as structural traps or preferential CO2 migration pathways depending on their sealing capacity. This study applies a computationally efficient rapid fault leakage analysis tool that combines a vertically integrated reservoir model with an upscaled [...]
A Late Miocene Reduction in the Spatial Breadth of Marine Tephra Occurrence: A Five-Basin Test of the Volcanic-Pulse Hypothesis
Published: 2026-07-22
Subjects: Earth Sciences, Geology, Physical Sciences and Mathematics, Stratigraphy, Volcanology
Episodic "pulses" of explosive volcanism have been widely invoked to explain climatic and biotic events across the Phanerozoic, but rarely tested against a high-resolution, multi-basin occurrence record. I tested for non-random temporal clustering of explosive volcanism using VOLCORE, a compilation of 34,696 visible tephra layers recovered by ocean drilling from across the world’s ocean basins. [...]
Mechanical Association between Pressure Wave Propagation Time and Constitutive Parameter Damage in Porous Media: Theoretical Derivation and Sensitivity Analysis
Published: 2026-07-16
Subjects: Engineering Mechanics, Geology, Geophysics and Seismology, Geotechnical Engineering, Hydraulic Engineering, Hydrology, Physics, Soil Science
The propagation time of pressure waves in porous media carries critical information about the constitutive parameters of the medium. This study rigorously derives the mechanical relationship between the lag time of pressure wave and the hydraulic parameters of porous media based on the diffusion wave equation. The lag time is shown to be a direct functional of the hydraulic conductivity and [...]
Fluvial response and recovery after the Permo-Triassic Mass Extinction revealed through quantitative paleohydrology
Published: 2026-07-16
Subjects: Earth Sciences, Geology, Geomorphology, Sedimentology, Stratigraphy
Anthropogenic climate change represents the greatest modern forcing on global river dynamics. Investigating the sensitivity of rivers to past climate in the geological record is thus crucial in understanding future landscapes in a warming world. The Sherwood Sandstone Group, UK, a unit of early-middle Triassic (c. 248-239 Ma) dryland fluvial deposits, records events during and after the [...]
Deep Neural Network-Based Inversion of Turbidites in Confined Basins
Published: 2026-07-11
Subjects: Artificial Intelligence and Robotics, Fluid Dynamics, Geology, Sedimentology
Turbidites generated by large earthquakes and other geological events are commonly preserved in small, topographically confined basins along active continental margins. Reconstructing flow conditions from these deposits is essential for assessing past hazards; however, existing inverse models have been validated only for unconfined settings, and their applicability to confined basins remains [...]
Thermodynamic modeling tools for the interpretation of melt inclusions and volcanic gases
Published: 2026-07-09
Subjects: Earth Sciences, Geology, Volcanology
H2O, CO2, and S are the most abundant volatiles in basaltic magmatic systems and are critical to understanding magma storage and the size and style of volcanic eruptions. Models for calculating melt–vapor (±mineral) equilibria are abundant in the literature but are not interoperable. Consequently, few comparisons of model outputs have been performed. To address this, we comprehensively compare [...]
The Rise of Diamond Open Access Journals in Earth Sciences: Past Developments, Present Tensions, and Future Pathways
Published: 2026-07-08
Subjects: Biogeochemistry, Cosmochemistry, Earth Sciences, Geochemistry, Geology, Geomorphology, Geophysics and Seismology, Library and Information Science, Paleontology, Planetary Sciences, Sedimentology, Tectonics and Structure, Volcanology
Over roughly the last decade, a visible, community-led Diamond Open Access (OA) ecosystem has emerged in the Earth sciences, not as a departure from tradition, but as the latest expression of a long-standing culture of open, society-supported scholarly communication. While free-to-read, fee-free publishing initiatives have deep roots in the field, predating the Diamond terminology by decades and [...]
A Bayesian Inversion for the Generation of Felsic Archean Crust
Published: 2026-07-02
Subjects: Earth Sciences, Geology
Archean continental crust is compositionally distinct from post-Archean continental crust; its felsic components predominantly comprise the tonalite, trondhjemite, and granodiorite suite, while its mafic components record evidence of secular mantle cooling. Although the geochemistry of these rocks have been well characterized, the production of Archean felsic magmas remains contested because the [...]
Clay Characterization of Tiller Flotten Quick Clay
Published: 2026-07-02
Subjects: Earth Sciences, Geology, Mineral Physics, Other Earth Sciences, Soil Science
In this study, we investigate the mineralogical and physicochemical properties of the Tiller–Flotten quick clay formation in Trondheim, Norway. The objective is to enhance our understanding of particle interactions within this quick clay system, thereby contributing to the development of more environmentally friendly stabilization strategies. A comprehensive suite of analytical techniques was [...]
Deep learning methods for the simulation and optimization of shallow geothermal energy systems
Published: 2026-07-01
Subjects: Applied Mathematics, Artificial Intelligence and Robotics, Computational Engineering, Geology, Natural Resources Management and Policy
Shallow geothermal energy (SGE) systems are crucial for decarbonizing the heating and cooling sector. Their planning, design and operation, however, rely on the simulation of heat transport in the subsurface, a task that is computationally demanding and particularly prohibitive for multi-query applications such as sensitivity analysis and optimization. Deep learning (DL) has recently emerged as a [...]
SegFormer and SegFormer-UNet for anthropogenic geomorphic feature extraction from land surface parameters
Published: 2026-06-27
Subjects: Environmental Monitoring, Geology, Geomorphology, Remote Sensing
Accurate, scalable mapping of anthropogenic geomorphic features from high spatial resolution terrain data remains challenging. While convolutional neural networks (CNNs) excel at characterizing local texture and patterns, their limited receptive fields may fail to capture broader spatial context. Transformer-based architectures, such as SegFormer, support stronger long-range dependency modelling, [...]
A Phanerozoic Atlas of Earth’s Atmosphere, Surface, and Interior Derived from the PANALESIS Plate Tectonic Model
Published: 2026-06-22
Subjects: Climate, Earth Sciences, Environmental Sciences, Geology, Other Environmental Sciences, Tectonics and Structure
Reconstructing the Earth system evolution through deep time requires spatially consistent, multi‑layer datasets that integrate geological, geophysical, and climatic information. Here we present a unified, high‑resolution (10×10km) global dataset describing the Earth’s evolution over the past 545 million years. This atlas provides 45 time slices spanning the Phanerozoic, each including quantified [...]
Interplay between supercontinents and accretionary orogens recorded in 200 million years of metallogeny
Published: 2026-06-21
Subjects: Geochemistry, Geology, Tectonics and Structure
The assembly of supercontinents and the evolution of accretionary orogens are one of the most fundamental drivers of Earth's lithospheric architecture and mineral endowment. Here we reconstruct the 200 million years metallogenic history of the mainland Australian part of the Delamerian convergent margin, a pivotal segment of the East Gondwana paleo-Pacific margin that archives the transition from [...]