Preprints
There are 7999 Preprints listed.
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.
Published: 2023-01-19
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 [...]
A multi-siderophile element connection between volcanic hotspots and Earth’s core
Published: 2023-01-19
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 [...]
SUBMARINE CREVASSE LOBES CONTROLLED BY LATERAL SLOPE FAILURE IN TECTONICALLY-ACTIVE SETTINGS: AN EXHUMED EXAMPLE FROM THE EOCENE AÍNSA DEPOCENTRE (SPAIN)
Published: 2023-01-20
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 [...]
Exceptional preservation of three-dimensional dunes on an ancient deep-marine seafloor: implications for sedimentary processes and depositional environments
Published: 2023-01-20
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
Published: 2023-01-20
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 [...]
Exacerbated ozone pollution in the greening northern China
Published: 2023-01-21
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 [...]
Periodicity in the Deccan volcanism modulated by plume perturbations at the mid-mantle transition zone
Published: 2023-01-21
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 [...]
Dynamic rainfall thresholds for landslide early warning in Progo Catchment, Java, Indonesia
Published: 2023-01-21
Subjects: Applied Statistics, Earth Sciences, Geomorphology, Hydrology, Meteorology
This study aims to derive and evaluate new empirical rainfall thresholds as the basis for landslide early warning in Progo Catchment, Indonesia, using high-resolution rainfall datasets. Although attempts have been made to determine such thresholds for regions in Indonesia, they used coarse-resolution data and fixed rainfall duration that might not reflect the characteristics of rainfall events [...]
3D SEISMIC ANALYSIS OF CENOZOIC SLOPE DEPOSITS AND FLUID FLOW PHENOMENA ALONG THE NIGERIAN TRANSFORM MARGIN
Published: 2023-01-26
Subjects: Education
High-resolution 3D seismic data covering an area of 2,845 km2 provide new insights on slope deposits and fluid-flow phenomena along the Nigerian Transform Margin, focusing on the ~ 2 km thick Cenozoic post-transform succession. The study documents large-scale mass-transport complexes, deep-water channel complexes, sediment waves, and a wide range of fluid flow phenomena. The focused fluid flow [...]
Lithospheric structure and melting processes in southeast Australia: new constraints from joint probabilistic inversions of 3D magnetotelluric and seismic data
Published: 2023-01-25
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 [...]
Evaluating the possible role of bottom currents and internal waves in shaping seafloor morphology in a mesophotic reef
Published: 2023-01-25
Subjects: Environmental Monitoring, Geology, Marine Biology, Other Environmental Sciences, Sedimentology
Mesophotic reefs are located in low light conditions which, depending on the region, are usually found in water depths greater than ~30 m. They are less affected by ocean warming than reefs found in shallower water depths and thus might become increasingly important for the sustainability of marine biodiversity. Here we explore the physical mechanisms controlling the sediment distribution around [...]
VolcashDB: Volcanic ash particle image and classification database
Published: 2023-01-25
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 [...]
THE DYNAMICS OF SUSTAINABILITY TRANSITIONS: AN ARCHETYPE FOR TRANSFORMATION
Published: 2023-02-06
Subjects: Engineering, Social and Behavioral Sciences
Significant global sustainability challenges include among others, energy, climate, and sanitation. Previous Sustainability Transition research has attempted to understand transformation complexity and interdependence, primarily through single-case methodological studies or large-scale analytical frameworks such as the Multi-Level Perspective. This leaves a knowledge gap on common dynamics [...]
Comparing Well and Geophysical Data for Temperature Monitoring within a Bayesian Experimental Design Framework
Published: 2023-01-25
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 [...]
Gravity-Driven Differences in Fluvial Sediment Transport on Mars and Earth
Published: 2023-01-25
Subjects: Physical Sciences and Mathematics
There is abundant evidence from fluvial landforms and deposits that Mars had rivers that actively transported sediment and shaped its surface. Sediment transport equations are playing a key role in quantifying river processes from these observations, which continue to increase in quality and quantity. In this study, we review sediment transport equations developed on Earth and isolate the effect [...]