Results 101 to 110 of about 74,370 (266)

Comparative effects of olivine and sand on KOH-treated clayey soil

Open Geosciences
Improving the strength of clayey soils remains a key concern in geotechnical practice. This study presents a comparative investigation of the effects of olivine waste and sand grains on a clayey soil, both in the absence and presence of potassium ...
Tahir Abdelmaoula Mahamoud, Sert Sedat, Arslan Eylem, Bol Ertan, Özocak Aşkın, Atlı İbrahim   +5 more
doaj   +1 more source

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

Deep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza, Hendrik Grobler, Moshood Onifade, Manoj Khandelwal   +3 more
wiley   +1 more source

The Effect of Intracrystalline Water on the Mechanical Properties of Olivine at Room Temperature

Geophysical Research Letters
The effect of small concentrations of intracrystalline water on the strength of olivine is significant at asthenospheric temperatures but is poorly constrained at lower temperatures applicable to the shallow lithosphere.
Kathryn M. Kumamoto, Lars N. Hansen, Thomas Breithaupt, David Wallis, Bo‐Shiuan Li, David E. J. Armstrong, David L. Goldsby, Yang (Will) Li, Jessica M. Warren, Angus J. Wilkinson   +9 more
doaj   +1 more source

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

Geoengineering impact of open ocean dissolution of olivine on atmospheric CO2, surface ocean pH and marine biology

Environmental Research Letters, 2013
Ongoing global warming induced by anthropogenic emissions has opened the debate as to whether geoengineering is a ‘quick fix’ option. Here we analyse the intended and unintended effects of one specific geoengineering approach, which is enhanced ...
Peter Köhler, Jesse F Abrams, Christoph Völker, Judith Hauck, Dieter A Wolf-Gladrow   +4 more
doaj   +1 more source

Forming Olivine Phenocrysts in Basalt: A 3D Characterization of Growth Rates in Laboratory Experiments

Frontiers in Earth Science, 2019
Our current knowledge of the genesis, ascent, storage, and eruption of mafic magmas is intimately linked with olivine, its primary crystal cargo. Recent claims that phenocryst-size crystals can grow rapidly and non-concentrically are challenging our ...
Adrien J. Mourey, Thomas Shea
doaj   +1 more source

Homogenization‐confined‐repair regeneration of spent LiFePO4 cathodes via tunable pre‐oxidization and microencapsulation strategy

InfoMat, EarlyView.
The HCR‐DR method combines pre‐oxidation and NIPS to synchronize atomic defect repair with structural engineering. Pre‐oxidation converts S‐LFP into stoichiometric intermediates, eliminating residual binder and carbon. Ethanol‐induced NIPS of PVA forms porous microcapsules with confined Li2CO3/glucose around S‐LFP‐Air particles. Annealing pyrolyzes PVA
Shouyu Qu, Yangyang Liu, Gen Chen, Zeinhom M. El‐Bahy, Dalal A. Alshammari, Mohamed H. Helal, Junwei Han, Jiang Zhou   +7 more
wiley   +1 more source

Unveiling the Crystal Structure of Sanidine: A Polarized Raman and Ab Initio Simulation Exploration

Journal of Raman Spectroscopy, EarlyView.
This study combines polarized Raman spectroscopy and ab initio calculations to assign theoretical vibrational modes to observed spectra. Polarized Raman spectra were collected in six geometries (40–1200 cm−1). Theoretical predictions via DFT show good agreement with experiments, though some discrepancies point to influences like trace elements and ...
Michele Cassetta, Luca Bellucci, Sabrina Nazzareni, Francesco Vetere, Marco Giarola, Gino Mariotto   +5 more
wiley   +1 more source

Effect of the vintage year on strontium isotopic ratio (87Sr/86Sr) of wines: a Portuguese case study

Journal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND Currently, there is a growing need for wine authenticity tools to face the global wine market and deal with adulteration cases. Stable isotope analyses, recognized by the Organization of Vine and Wine as a tool for detecting authenticity fraud, form the basis of the European Wine Databank, which faces limitations concerning the ...
Vasiliki Thanasi, Daniele Evola, Gonçalo Victorino, Jorge M Ricardo‐da‐Silva, Manuel Madeira, Sofia Catarino   +5 more
wiley   +1 more source

Mid-Infrared Spectrophotometric Observations of Fragments B and C of Comet 73P/Schwassmann-Wachmann 3

, 2010
We present mid-infrared spectra and images from the GEMINI-N (+Michelle) observations of fragments SW3-[B] and SW3-[C] of the ecliptic (Jupiter Family) comet 73P/Schwassmann-Wachmann 3 pre-perihelion.
Boss, Bradley, Bregman, Charles E. Woodward, Crovisier, Crovisier, Crovisier, Crovisier, David E. Harker, David K. Lynch, Diane H. Wooden, Dorschner, Ebel, Edoh, Ehrenfreund, Hanner, Hanner, Harker, Harker, Harker, Howell, Jones, Joyce, Jäeger, Kelley, Kelley, Kemper, Kemper, Li, Lisse, Lord, McDonnell, Meech, Michael L. Sitko, Michael S. Kelley, Moreno, Orosei, Oört, Ray W. Russell, Scotti, Sekanina, Sitko, Stansberry, Watanabe, Watanabe, Weaver, Wooden, Wooden, Wooden, Wooden, Wooden   +50 more
core   +1 more source