Results 21 to 30 of about 11,155 (262)
Известия высших учебных заведений: Геология и разведка, 2019 Information on the distribution of trace and rare-earth elements in the bottom sediments of estuarine zones of various river categories (large rivers, rivers draining water collections, composed of sedimentary or magmatic and metamorphic rocks, etc.) of ...
A. V. Maslov
doaj +1 more source
Heliyon, 2018 Clay mineralogy and major-element geochemistry of Miocene sedimentary rock and modern river sediment samples collected from the Ba River basin in central Vietnam are used to evaluate the chemical weathering processes during the Miocene and the present ...
Pham Nhu Sang +5 more
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Geological and geotechnical characterization of Ziragn Dam sitting, northwestern Ethiopia
Environmental and Sustainability Indicators, 2023 The goal of this study was to look at the geological and geotechnical conditions of the Ziragn dam, which would be built across the Ziragn river for irrigation purposes.
Degu Birhanu, Chalachew Tesfa
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GeodermaRare earth elements (REEs) have gained attention as tracers of pedogenic processes over the last few decades. Clay-sized fractions (CSFs, < 2 μm) may play a crucial role in hosting REEs. To better understand the pedochemical signals of REEs in clay-sized
Xianming Zhang +8 more
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Examination of effective stress in clay rock
Journal of Rock Mechanics and Geotechnical Engineering, 2017 This paper examines the effective stress in indurated clay rock theoretically and experimentally. A stress concept is derived from the analysis of the microstructure and of the pore water in the highly-indurated Callovo-Oxfordian and Opalinus clay rocks, and subsequently validated by various experiments performed on these claystones.
openaire +2 more sources
Retrograde crystallization of clay minerals in metamorphic rocks linked to fluid circulation related to fault activity [PDF]
European Journal of MineralogyThe study of two outcrops of schists in the Padul Fault area has allowed us to corroborate the enrichment in clay minerals in the fault zone. In the case of the dark schist outcrop, the fault rocks show a reduction in mineral diversity with ...
I. Abad +3 more
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Rainfall Shapes the Diversity of Soil Nitrogen‐Fixing Microorganisms Worldwide
Advanced Science, EarlyView.This study reveals the distinctive pattern and mechanism of rainfall driving the global biodiversity and biogeography of soil potential N‐fixing microorganisms, and constructs the theoretical framework. The results guide us on how to maintain ecosystem productivity under future climate changes (e.g., whether a specific region needs more N fertilizers ...
Bin Hua +18 more
wiley +1 more source
Iraqi Geological Journal, 2018 The mudstone/ shale units constituted 60% of the Kolosh Formation of 170 m thickness, which were studied and the clay minerals were identified to conclude the origin and paleoclimate.
Iqbal j. Mohammed +1 more
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American Journal of Botany, EarlyView.Abstract Premise The soil depth of underground storage organs (USOs) of geophytes involves cost–benefit trade‐offs and may relate to USO age, size, and disturbances such as fire and herbivory. Yet determinants of USO depth are poorly studied. We posit that belowground mammalian predation of USOs is a selective force for the positive relationship ...
Tineke Kraaij +4 more
wiley +1 more source
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Fines migration induced by low salinity water flooding severely impairs reservoir permeability and injectivity presenting a critical challenge in enhanced oil recovery. This study aims to synthesize and evaluate a surface‐modified polymer‐silica nanocomposite to mitigate clay mobilization and preserve the hydrodynamic capacity of porous media.
Mohamed Abu Shuheil +8 more
wiley +1 more source