Preprints

There are 3491 Preprints listed.

Comparing Well and Geophysical Data for Temperature Monitoring within a Bayesian Experimental Design Framework

Robin Thibaut, Nicolas Compaire, Nolwenn Lesparre, et al.

Published: 2023-01-24
Subjects: Earth Sciences, Hydrology, Physical Sciences and Mathematics, Water Resource Management

Temperature logs are an important tool in the geothermal industry. Temperature measurements from boreholes are used for exploration, system design, and monitoring. The number of observations, however, is not always sufficient to fully determine the temperature field or explore the entire parameter space of interest. Drilling in the best locations is still difficult and expensive. It is therefore [...]

VolcashDB: Volcanic ash particle image and classification database

Damià Benet, Fidel Costa, Christina Widiwijayanti, et al.

Published: 2023-01-24
Subjects: Physical Sciences and Mathematics

Volcanic ash provides unique pieces of information that can help understand the progress of volcanic activity at the early stages of unrest and possible transitions towards different eruptive styles. Ash contains different types of particles that are indicative of eruptive styles and magma ascent-related processes. However, classifying ash particles into its main components is not [...]

Internal waves and bottom currents interactions around mesophotic reefs, southeastern Mediterranean

Or M. Bialik, Omri Gadol, Aaron Micallef, et al.

Published: 2023-01-24
Subjects: Environmental Monitoring, Geology, Marine Biology, Other Environmental Sciences, Sedimentology

Mesophotic reefs are found in water depths greater than 30m and as such are, for the most part, removed from most direct wave activity, notably in the Mediterranean Sea. There, they are protected from anthropogenic impact and serve as a possible refuge for marine biodiversity in a warming ocean. Yet, like any reef, their growth is modulated by the distribution of the sediment they produce and [...]

Lithospheric structure and melting processes in southeast Australia: new constraints from joint probabilistic inversions of 3D magnetotelluric and seismic data

Maria Constanza Manassero, Sinan Özaydin, Juan Carlos Afonso, et al.

Published: 2023-01-24
Subjects: Geology, Geophysics and Seismology

The thermochemical structure of the lithosphere exerts control on melting mechanisms in the mantle as well as the location of volcanism and ore deposits. Imaging the complex interactions between the lithosphere and asthenospheric mantle requires the joint inversion of multiple data sets and their uncertainties. In particular, the combination of seismic velocity and electrical conductivity with [...]

Gravity-driven differences in fluvial sediment transport fluxes on Mars and Earth

Lisanne Braat, Muriel Z. M. Brückner, Elliot Sefton-Nash, et al.

Published: 2023-01-24
Subjects: Physical Sciences and Mathematics

Studies of fluvial landforms on the surface of Mars have become more detailed since rover data became available of areas altered by water (e.g. water-deposited sediment in Gale crater by Curiosity and the Jezero delta by Perseverance). As surface interpretations become more detailed, we need to pay more attention to the differences between Earth and Mars to fully describe the processes that [...]

Dynamic rainfall thresholds for landslide early warning in Progo Catchment, Java, Indonesia

Ratna Satyaningsih, Victor Jetten, Janneke Ettema, et al.

Published: 2023-01-20
Subjects: Applied Statistics, Earth Sciences, Geomorphology, Hydrology, Meteorology

High spatiotemporal resolution satellite data have been available to provide rainfall estimates with global coverage and relatively short latency. On the other hand, a rain gauge measures the actual rain that falls to the surface, but its network density is commonly sparse, particularly those that record at sub-daily records. These datasets are extensively used to define rainfall thresholds for [...]

Periodicity in the Deccan volcanism modulated by plume perturbations at the mid-mantle transition zone

Dip Ghosh, Joyjeet Sen, Nibir Mandal

Published: 2023-01-20
Subjects: Physical Sciences and Mathematics

In peninsular India, the Deccan Traps record massive, continental-scale volcanism in a sequence of magmatic events that mark the mass extinction at the Cretaceous-Paleogene boundary. Although the Deccan volcanism is linked with the Réunion hotspot, the origin of its periodic magmatic pulses is still debated. We develop a numerical model, replicating the geodynamic scenario of the African [...]

Exacerbated ozone pollution in the greening northern China

Jiawei Xu, Sijia Lou, Nan Wang, et al.

Published: 2023-01-20
Subjects: Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

Biogenic volatile organic compounds are vital precursors of tropospheric ozone (O3). In the past decades, northern China has witnessed the strongest enhancement of vegetation covers due to national afforestation projects; however, response of the vegetation greenness to near-surface O3 remains unclear. By integrating measurements and numerical simulations, here we show that O3 pollution in [...]

Exceptional preservation of three-dimensional dunes on an ancient deep-marine seafloor: implications for sedimentary processes and depositional environments

Euan Soutter, Ander Martinez-Donate, Ian Kane, et al.

Published: 2023-01-19
Subjects: Geology, Stratigraphy

Depositional and erosional bedforms can be used to reconstruct sedimentary processes and aid paleoenvironmental interpretations. Using exhumed deep-marine strata in the Eocene Aínsa Basin, Spain, we document a 3-dimensional package of dunes; a relatively rarely identified bedform in deep-marine environments. Our analysis shows that the dunes have curvilinear crests in planform, with smaller [...]

A Data-driven Approach to Petroleum Engineering Problems

Rong Lu

Published: 2023-01-19
Subjects: Education, Engineering

In this work, a data-driven approach is taken to tackle problems in Petroleum Engineering domain, for both conventional and unconventional reservoirs. Conventional reservoirs face the problem of losing energy for flowing after a few years of production, thus operators choose to inject water and inject CO$_2$ as a secondary and tertiary recovery method. The question of interest is that how [...]

SUBMARINE CREVASSE LOBES CONTROLLED BY LATERAL SLOPE FAILURE IN TECTONICALLY-ACTIVE SETTINGS: AN EXHUMED EXAMPLE FROM THE EOCENE AÍNSA DEPOCENTRE (SPAIN)

Ander Martinez-Donate, Euan Soutter, Ian Kane, et al.

Published: 2023-01-19
Subjects: Earth Sciences

Tectonic deformation and associated submarine slope failures modify seafloor relief, influencing sediment dispersal patterns and the resulting depositional architecture of deep-water systems. The exhumed Middle Eocene strata of the Banastón deep-water system in the Aínsa depocentre, Spain, allow the interplay between submarine slope confined systems, mass flow deposits, and syn-depositional [...]

The applicability of G-BASE stream sediment geochemistry as a combined geological mapping, and prospective exploration tool for As-Co-Cu-Ni mineralisation across Cumbria, UK.

Adam Eskdale, Sean Johnson, Amy Gough

Published: 2023-01-18
Subjects: Earth Sciences, Geochemistry, Geology, Multivariate Analysis, Physical Sciences and Mathematics, Statistics and Probability

Stream sediment geochemistry is a useful tool to analyse the geochemistry of the local geology within the source catchment area. This has significant applicability within the field of mineral exploration where understanding regional lithological geochemistry is needed, facilitating the identification of critical metal deposits. Successful identification of these deposits is essential to help [...]

Dampening effect of global flows on Rayleigh-Taylor instabilities: Implications for deep-mantle plumes vis-à-vis hotspot distributions

Arnab Roy, Dip Ghosh, Nibir Mandal

Published: 2023-01-18
Subjects: Earth Sciences, Fluid Dynamics, Numerical Analysis and Computation

It is a well-accepted hypothesis that deep-mantle primary plumes originate from a buoyant boundary layer at the Core-Mantle Boundary (CMB), where Rayleigh–Taylor (RT) instabilities play a key role in the plume initiation process. Combining 2D computational fluid dynamic (CFD) model simulations and a linear stability analysis, this article explores how a horizontal global flow in the mantle can [...]

A multi-siderophile element connection between volcanic hotspots and Earth’s core

Bradley Peters, Andrea Mundl-Petermeier, Valerie Finlayson

Published: 2023-01-18
Subjects: Geochemistry

The existence of resolvable 182W/184W deficits in modern ocean island basalts (OIB) relative to the bulk silicate Earth has raised questions about the relationship of these rocks to Earth’s core. However, because the core is expected to host high abundances of highly siderophile elements (HSE), it would be expected that such heterogeneity is accompanied by correlating variability in HSE [...]

The evolution of catchment-depositional system relationships on the dip slopes of intra-rift basement highs: an example from the Frøya High, Mid-Norwegian Rifted Margin

Gijs Allard Henstra, Atle Rotevatn, Timothy M Cullen, et al.

Published: 2023-01-17
Subjects: Physical Sciences and Mathematics

Basement highs form one of many potential sediment source areas during the evolution of continental rifts and rifted margins and add to the topographic complexity typical of active rifts. Footwall basement highs acting as a source area to sedimentary systems in the hangingwall of major faults has been documented in many systems worldwide. However, the back-tilted footwall dip slopes of such highs [...]

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