Results 101 to 110 of about 13,016 (258)

Geochemical Disequilibrium at the Brittle‐Ductile Transition

Geochemistry, Geophysics, Geosystems
We investigate the microtextural, microchemical, and isotopic effects of late‐stage ductile deformation in quartzite mylonites and kyanite–muscovite–quartz veins from the Raft River shear zone (Utah).
Raphaël Gottardi, Ryan McAleer, Gabriele Casale, Martin Wong   +3 more
doaj   +1 more source

A new microenvironment for the formation of clay minerals: the example of authigenic halloysite-7Å and gibbsite in a stalactite from Agios Georgios Cave, Kilkis, north Greece

International Journal of Speleology, 2015
An unusual authigenic origin for halloysite and gibbsite is reported in a stalactite from Agios Georgios Cave, Kilkis. This speleothem includes mostly pure calcite whereas minor areas of Mg-rich calcite and scarce dolomite are present in four growth ...
Elena Ifandi, University of Patras, Basilios Tsikouras, Dimitrios Papoulis, Konstantin Hatzipanagiotou, Aspasia Antonelou   +4 more
doaj   +1 more source

Water Cationic Composition on Potassium Displacement in Tropical Soils

CLEAN – Soil, Air, Water, Volume 54, Issue 6, June 2026.
ABSTRACT This study aimed to evaluate the interplay between water hardness, sodium adsorption ratio (SAR), and electrical conductivity (EC); with tropical soil physical, chemical, and mineralogical characteristics on the displacement K+. The water quality treatments represented solutions suitable and not suitable for irrigation, with varying levels of ...
Miguel Angel Corea Alvarez, Michael Silveira Thebaldi, Marina Neves Merlo, Daniela Conceição de Jesus, Jaqueline dos Santos Soares, Elvis Márcio de Castro Lima, Adriano Valentim Diotto, Luiz Antonio Lima, Luiz Fernando Coutinho de Oliveira   +8 more
wiley   +1 more source

Progressively Fenitised Schist and Carbonatitic Clasts From a Metasomatic Aureole Beneath the Alkalic Dunedin Volcano, Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Clasts of albite‐porphyroblastic quartzofeldspathic schist, derived from the Otago Schist basement, occur within the Port Chalmers Breccia, a diatreme at the centre of the Dunedin stratovolcano, New Zealand. Schists have undergone varying degrees of replacement reactions (at temperatures of 300° to >500°C) producing hornfelses, with Ca‐ and K‐enriched ...
Alan F. Cooper
wiley   +1 more source

Mineralogy of Historic Scheelite Mine Tailings at Glenorchy, Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Otago Schist orogenic mineral deposits with scheelite and gold in the Glenorchy area are mineralogically and geochemically similar to, but structurally different from, those at the active Macraes gold mine in East Otago. Glenorchy veins were mined for scheelite up to 1970s, and an abandoned processing battery site at Glenorchy is now being managed for ...
Dave Craw, Marshall Palmer, Doug MacKenzie   +2 more
wiley   +1 more source

Molecular Insights Into the Water Freezing on Kaolinite Surfaces: The Key Role of Surface Properties

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 8, Page 3530-3545, 10 June 2026.
ABSTRACT Unfrozen water content is a key factor governing the physical properties of frozen soils, and variations in mineral surface properties play a critical role in determining this content. However, the fundamental physical mechanisms of how different mineral surfaces affect soil water freezing remain poorly understood.
Yijie Wang, Zhen‐Yu Yin, Pierre‐Yves Hicher   +2 more
wiley   +1 more source

Análisis del tratamiento en medio ácido de partículas de pizarra

Boletín de la Sociedad Española de Cerámica y Vidrio, 2002
Slate particles were treated in liquid acid medium. The results were analyzed as a function of the disolved ions and specific surface area values. Infrared spectroscopy (FT-IR) and X- ray difraction were also used in this study.
Rodríguez, María A., Rubio, F., Rubio, J., Murciego, A., Oteo, J. L.   +4 more
doaj  

Pegmatites of the Mokromoskovsk granite pluton

Вісник Харківського національного університету імені В.Н. Каразіна. Серія Геологія. Географія. Екологія
Introduction. The Mokromoskovsky pluton is composed of light gray granites and dark gray granodiorites. Light gray granites are composed of oligoclase (35-40%), microcline (20-25%), quartz (30-35%), and biotite (2-5%).
Yuliia Lytvynenko
doaj   +1 more source

Evaluating the sustainability of mineral water consumption using multi‐scale hydrogeophysics in Caxambu, Brazil

Near Surface Geophysics, Volume 24, Issue 3, Page 234-251, June 2026.
Abstract A better understanding of the near‐surface aquifer system of the Caxambu Water Park, located in the Minas Gerais State, Brazil, has been achieved. The study aimed to identify groundwater reservoirs and flow patterns and contribute to the hydrogeological conceptual model using a multi‐scale geophysical approach.
Emanuele F. La Terra, Miguel Tupinambá, Liliane P. Panetto, José Antonio N. Pereira, Tainã P. Oliveira, Antonio Carlos Pedrosa‐Soares   +5 more
wiley   +1 more source

One‐Step Fabricated Green Tubular Ceramic Membrane for Chromium (VI) Removal With High Permeability and Low Production Cost

ChemistrySelect, Volume 11, Issue 23, 18 June 2026.
ABSTRACT Large volumes of wastewater are released into the environment without proper treatment. Water pollution is linked to over 80% of diseases and deaths each year. Contamination by heavy metal ions arises from both natural sources and human activities.
Mhamed A. Aburawi, Almahdi A. Alhwaige, Afef Attia, Hajer Aloulou, Zahia Tigrine, Seif El Islam Lebouachera, Raja Ben Amar   +6 more
wiley   +1 more source