Preprints
There are 6976 Preprints listed.
Hidden early clinopyroxene relicts record reactive porous flow in oceanic plutonic series
Published: 2025-12-11
Subjects: Geology
Almost two-thirds of the Earth’s magmatic budget is concentrated at mid-ocean ridges, with 85% of this being emplaced as intrusive rocks. In these systems, now understood to consist mostly of a crystal-dominated igneous medium (mush), melt differentiation at depth is predominantly governed by melt-mush reactions. These reactions have been well described for primitive lithologies (ranging from [...]
Carbon dioxide removal could perpetuate community-scale inequalities of U.S. air pollution in net-zero scenarios
Published: 2024-11-28
Subjects: Environmental Public Health, Environmental Sciences, Environmental Studies
Pathways to net-zero reduce GHG emissions and improve air quality, but the magnitude and distribution of these improvements will depend on specific mitigation decisions, such as the amount of carbon dioxide removals (CDR). Here, we combine a series of models and datasets to analyze community-scale PM2.5 impacts across the contiguous U.S. of net-zero scenarios with different levels of CDR. Both [...]
Some mechanical and thermal manifestations of the 1908 Tunguska event near its epicenter
Published: 2025-03-20
Subjects: Education, Physical Sciences and Mathematics
This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. It is devoted to some manifestations near the epicenter of the event. Many of the manifestations were established back in the 1960s. Recently a couple of works have appeared that reveal previously undetected phenomena, namely, traces of exposure to high temperatures and high pressure. A [...]
Sedimentological Characteristics, and Provenance of the Late Cretaceous Sediment in the Eastern Dahomey Basin
Published: 2022-10-24
Subjects: Physical Sciences and Mathematics
Field studies of outcrop samples from part of the Dahomey basin, southeastern Nigeria, were investigated to unravel the lithofacies distribution and provenance of the basin. Granulometric analysis of the sandstone facies of the Araromi Formation has been studied. Histograms of the sediments exhibit both unimodal and bimodal trends. The cumulative curve of the studied samples Is typical of fluvial [...]
Distributed Acoustic Sensing in a Greenlandic Outlet Glacier: Developing Machine Learning Approaches to Benefit Cryoseismic Data Analysis
Published: 2022-10-08
Subjects: Geophysics and Seismology, Glaciology, Other Computer Sciences
The recognition of Distributed Acoustic Sensing (DAS) as a valuable tool for glaciological seismic applications is growing. However, besides the logistical challenges of installing fibre-optic cable, the volume of DAS data that can be collected in a field campaign poses computational challenges. In this paper, we show the potential of active-source DAS to image and characterise subglacial [...]
FIELD LEVEL VARIATION INFLUENCED OUTCOMES MORE THAN N-FERTILISER, FYM, COVER CROPS OR THEIR LEGACY EFFECTS FOLLOWING CONVERSION TO A NO-TILL ARABLE SYSTEM
Published: 2022-10-08
Subjects: Agriculture, Biogeochemistry, Earth Sciences, Environmental Chemistry, Other Earth Sciences, Other Environmental Sciences, Soil Science
Crop establishment in no-till arable systems benefits from favourable soil conditions. Combined with the incorporation of crop residues and manures, no-till can influence soil organic carbon (SOC) and organic matter (SOM) dynamics, crop productivity and nutrient cycling. These processes are shaped by spatial and temporal factors and associated microbial processes. There is a lack of diachronic [...]
GEOCHEMICAL AND MINERALOGICAL STUDY OF THE CRETACEOUS SEDIMENTS IN KERI KERI, FIKA, GONGILA, AND BIMA SANDSTONE FORMATION BORNU BASIN, NORTH-EASTERN NIGERIA
Published: 2022-10-24
Subjects: Physical Sciences and Mathematics
The mineralogical and geochemical composition of Cretaceous and Tertiary sediments of the Bornu Basin, northeastern Nigeria penetrated by Kanadi Wells, have been studied towards deducing aspects of their derivation and deposition. The sediments comprising the Bima Sandstone Formation, sandy-shale Gongila Formation, and, clayey and shaley Fika Formation are mainly composed of quartz (35-58%) and [...]
Client-side Web-based Model Coupling using Basic Model Interface for Hydrology and Water Resources
Published: 2022-10-06
Subjects: Civil and Environmental Engineering, Computational Engineering, Other Engineering
A recent trend in hydroinformatics has been the growing number of data, models, and cyber tools which are web accessible, each aiming to improve common research tasks in hydrology through web technologies. Coupling web-based models and tools holds great promise for an integrated environment that can facilitate community participation, collaboration, and scientific replication. There are many [...]
Investigating the Eastern Alpine–Dinaric transition with teleseismic receiver functions: Evidence for subducted European Crust
Published: 2022-10-09
Subjects: Geophysics and Seismology, Tectonics and Structure
Coupled otolith and foraminifera oxygen and carbon stable isotopes evidence paleoceanographic changes and fish metabolic responses
Published: 2022-10-06
Subjects: Earth Sciences
Capturing the mechanisms leading to the local extirpation of a species in deep-time is a challenge. Combining stable oxygen and carbon isotopic analyses on benthic and planktonic foraminifera and the otoliths of pelagic and benthic fish species, we reveal here the paleoceanographic regime shifts changes that took place in the Eastern Mediterranean from 7.2 to 6.5 Ma, in the precursor phase to the [...]
Rapid quench piston cylinder apparatus: an improved design for the recovery of volatile-rich geological glasses from experiments at 0.5 - 2.5 GPa
Published: 2022-10-08
Subjects: Earth Sciences
The accurate and precise determination of the compositions of silicate glasses formed from melts containing the volatile components H2O and CO2 recovered from high-pressure, high-temperature experiments is essential to our understanding of geodynamic processes taking place within the planet. Silicate melts are often difficult to analyse chemically because the formation of quench crystals and [...]
Characterising the internal structural complexity of the Southern North Sea Zechstein Supergroup Evaporites
Published: 2022-10-08
Subjects: Earth Sciences, Geology, Tectonics and Structure
The internal complexity present within layered evaporite sequences is often an overlooked feature in sedimentary basins, with attention frequently concentrating on the external geometries that salt bodies form. Through the availability of large areas of 3D seismic data and new seismic imaging techniques the opportunity to view the internal structures that form within layered evaporites allows for [...]
Escalating wildfires in Siberia driven by multiple climate feedbacks under a warming Arctic
Published: 2022-10-08
Subjects: Earth Sciences
Wildfire in Siberia is of paramount importance in the carbon cycle and climate change as it is a major disturbance in the pan-Arctic ecosystems. In recent decades, the Siberian wildfire regime has been changing; however, less is known about the key climatic drivers and the underlying feedback over these vulnerable fire-prone landscapes. Here, based on ground-based and satellite observations and [...]
Quantitative constraints on flood variability in the rock record.
Published: 2022-10-27
Subjects: Earth Sciences, Physical Sciences and Mathematics
Floods determine river behaviour in time and space. Yet quantitative measures of discharge variability from geological stratigraphy are sparse, even though they are critical to understand landscape sensitivity to past and future environmental change. Here we show how storm-driven river floods in the geologic past can be quantified, using Carboniferous stratigraphy as an exemplar. The geometries [...]
Seismicity modulation due to hydrological loading in a stable continental region: a case study from the Jektvik swarm sequence in Northern Norway
Published: 2022-10-10
Subjects: Geophysics and Seismology
Seismic swarms have been observed for more than 40 years along the coast of Nordland, Northern Norway. However, the detailed spatio-temporal evolution and mechanisms of these swarms have not yet been resolved due to the historically sparse seismic station coverage. An increased number of seismic stations now allows us to study a nearly decade-long swarm sequence in the Jektvik area during the [...]