Results 91 to 100 of about 9,068 (209)

Effects of humic acid on pyrite surface oxidation and interfacial interactions

Ecotoxicology and Environmental Safety
Pyrite, as a primary component of tailings, can be readily oxidized and result in the generation of acid mine drainage (AMD). Humic acid (HA), the most common organic matter in the environment, tends to be adsorbed on pyrite surfaces.
Xuan Guan, Xiaomei Tan, Wenrui Jiang, Yijian Zhong, Xiaohua Shu, Jie Liu, Chongmin Liu, Zhihong Tu   +7 more
doaj   +1 more source

Nano‐pyrite as a plant hormone regulator: Emulating seed hormopriming

Modern Agriculture
‘Pre‐sowing seed priming’ and ‘pre‐transplanting root priming’ are promising strategies to improve agriculture productivity. Farmers, seed production enterprises, and seedling producers constantly search for economic priming agents that help improve ...
Brijesh Kaler, Himanshi Jangir, Sabyasachi Sarkar, Jayprakash Sharma, Mainak Das   +4 more
doaj   +1 more source

GOLDEN PYRITES FROM THE IBERIAN PYRITE BELT [PDF]

Goldschmidt2021 abstracts, 2021
Lola Yesares Ortiz, Rubén Piña, Jose María González-Jiménez, Sáez Ramos Reinaldo, Gabriel Ruiz de Almodovar, Joaquín Proenza, Juan Manuel Pons   +6 more
openaire   +1 more source

Mineralization and trace element distribution in pyrite using EMPA in exploration drill holes from Cheshmeh Zard gold district, Khorasan Razavi Province, Iran

Journal of Economic Geology, 2015
Introduction Pyrite is the most abundant sulfide mineral in low sulfidation ore deposits. Experimental studies have shown that low-temperature ( 200°C) from hydrothermal or metamorphic fluids (Butler and Rickard, 2000).
Zahra Alaminia, Mohammad Hassan Karimpour, eyed Massoud Homam   +2 more
doaj  

Placer Gold in the Eastern Maniototo Basin, Otago, New Zealand: Deposits and Sources

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.
Abundant detrital gold particles in placer deposits of eastern Maniototo basin, southern South Island, New Zealand, have only minor rounding and retain many angular and crystalline features, implying derivation from a nearby source. Likewise, gold particle interior textures have undergone only minor transport‐induced deformation and recrystallisation ...
Dave Craw, Doug MacKenzie, Gemma Kerr, Kerry Stanaway, William Gray, Alicia McKean   +5 more
wiley   +1 more source

Solid‐State Reductive Electrochemistry of Lapis Lazuli/Ultramarine

Electroanalysis, Volume 38, Issue 11, November 2026.
The reductive electrochemistry of ultramarine blue is described in terms of a concerted proton plus metal cation assisted solid‐sate redox transfer. The reductive electrochemistry of different ultramarine specimens in contact with aqueous electrolytes is studied using the voltammetry of immobilized particles.
Antonio Doménech‐Carbó, Lorenzo Mercuri, Fritz Scholz, Laura Medeghini, María Teresa Doménech‐Carbó   +4 more
wiley   +1 more source

An Anisotropic Constitutive Model for Crushable Geomaterials Based on Non‐Stationary Critical State Line Concept

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 16, Page 5919-5935, November 2026.
ABSTRACT In this paper, the dependencies of granular soil behaviour on particle crushing and fabric anisotropy are formulated within a novel model based on bounding surface plasticity theory enriched by the non‐stationary critical state line (NCSL) concept.
Hesam Dejaloud, Hamed Taghavizade, Mohammad Rezania   +2 more
wiley   +1 more source

Hydrothermal Sealing at Turrialba, Poás, and Rincón de la Vieja Volcanoes (Costa Rica) Promotes Phreatic and Phreatomagmatic Eruptions

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 11, November 2026.
Abstract Hydrothermal sealing is a mechanism thought to be responsible for challenging‐to‐forecast phreatic and phreatomagmatic eruptions. To better understand this process, we present a study in which we assessed the textural, mineralogical, and physical properties (porosity, permeability, and tensile strength) of blocks of hydrothermal seal that were
Michael J. Heap, Geoffroy Avard, Claire E. Harnett, H. Albert Gilg, James Hickey, Thierry Reuschlé, Fabian B. Wadsworth, Maëlys Moulin, Sophie Pearson‐Grant, J. Maarten de Moor, Emily Mick, Patrick Baud   +11 more
wiley   +1 more source

In Situ Observation of Pressure‐Enhanced Hydrous–Anhydrous Solid Solution in Lower‐Mantle SiO2–AlOOH Phases

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Water plays a critical role in Earth's mantle dynamics and evolution, yet lower‐mantle storage mechanisms remain debated. δ‐AlOOH and SiO2 phases have been independently proposed as high‐pressure water hosts. Here, we conducted in situ synchrotron X‐ray diffraction experiments with a multi‐anvil apparatus and sintered diamond anvils to ...
M. Nishi, K. Takahashi, H. Dekura, K. Kawano, H. Koike, K. Nakamura, T. Kondo, H. Kuwahara, S. Kakizawa, N. Tsujino, Y. Higo   +10 more
wiley   +1 more source

Correlative optical, electron, and electrochemical microscopy assessment of localised sulphide reactivity in concrete aggregates. [PDF]

J Microsc
Atiba JO, Peterson K, Ogunsanya IG.
europepmc   +1 more source