Results 61 to 70 of about 32,961 (360)

Cathodoluminescence response from sanidine feldspar [PDF]

, 2013
In the present study, cathodoluminescence (CL) providing information about surface rather than bulk material reveals blue and red emissions within the sanidine feldspar from the Eifel Mountains, Germany.
Karabulut Y., Canmoǧlu A., Can N.
core   +2 more sources

Uso de diopsídio em massas cerâmicas para grés sanitários

Cerâmica
Resumo Atualmente, há uma severa escassez de jazimentos de feldspato de boa qualidade. Por outro lado, o diopsídio vem se mostrando um fundente alternativo para a indústria cerâmica, mas ainda pouco estudado.
R. H. L. Silva, G. A. Neves, H. C. Ferreira, L. N. L. Santana, A. C. V. Nóbrega, R. R. Menezes   +5 more
doaj   +1 more source

Evidence in Archaean Alkali Feldspar Megacrysts for High-Temperature Interaction with Mantle Fluids

, 2011
International audienceGrowth and regrowth textures, trace element and oxygen isotope compositions, and water content or species have been studied in alkali feldspars from the late Archaean Closepet igneous bodies. Feldspar crystals grew from mixed magmas
Halas, Stanislaw, Martin, Hervé, Slaby, Ewa, Devidal, Jean-Luc, Hervé Martin, Klaus Simon, Moyen, Jean Francois, Devidal, Jean Luc, Simon, Klaus, Mudlappa Jayananda, Moyen, Jean-François, Jean-François Moyen, Domonik, Andrzej, Jayananda, Mudlappa, Hamada, Morihisa, Ewa Słaby, Andrzej Domonik, Götze, Jens, Morihisa Hamada, Jens Götze, Stanisław Hałas, Michał Śmigielski, Slaby, Erwan, Smigielski, Michal, Hoefs, Jochen, Goetze, Jens, Jochen Hoefs, Jean-Luc Devidal   +27 more
core   +1 more source

Thermal‐induced fracture evolution and acoustic signature of Beishan granite: Insights into tensile strength of barrier system for high‐level radioactive waste disposal

Deep Underground Science and Engineering, EarlyView.
The tensile strength of granite, a proposed host for nuclear waste, degrades severely above 400°C. We link this to specific microcracking patterns captured by acoustic emission, establishing a scientific basis for assessing repository safety under thermal load.
Wei Zeng, Shijie Li, Xiaozhao Li, Zhen Huang, Shangtong Yang, Wentao Xu, Biao Wang, Yun Wu   +7 more
wiley   +1 more source

Importância das espécies minerais no potássio total da fração argila de solos do Triângulo Mineiro Importance of mineral species in total potassium content of clay fraction in soils of the Triângulo Mineiro, Minas Gerais State, Brazil

Revista Brasileira de Ciência do Solo, 2003
Poucos trabalhos relacionam a reserva de K em solos desenvolvidos sob clima tropical úmido com os minerais presentes na fração argila. Com esse propósito, coletaram-se amostras de 19 solos no Triângulo Mineiro, originados de diferentes materiais de ...
V. F. Melo, G. F. Corrêa, P. A. Maschio, A. N. Ribeiro, V. C. Lima   +4 more
doaj   +1 more source

Thermoluminescence signal in K-feldspar grains: Revisited

, 2015
Recent work has shown that infrared stimulated luminescence (IRSL) signals in sedimentary coarse-grain K-feldspars are derived mainly from high temperature thermoluminescence (TL) peaks around 400 degrees C, and the fading components of the IRSL signal ...
Xu, Hongyun, Gong, Gelian, Sun, Weidong
core   +1 more source

A Reproducible SEM Surface Imaging Protocol for Monitoring Microstructural Changes During Gas–Rock Interactions

Greenhouse Gases: Science and Technology, EarlyView.
ABSTRACT Reliable characterization of mineralogical and textural changes in rock samples is essential for understanding fluid–rock interactions, particularly in experimental studies simulating subsurface conditions. This study presents a reproducible protocol for scanning electron microscopy (SEM) analysis of rock surfaces before and after exposure to ...
Berta Ordóñez‐Casado, Timea Kovács, Sara Roces, Edgar Berrezueta   +3 more
wiley   +1 more source

K-feldspar hygrochronology

, 2013
The significance of the multi-isotopic record preserved in K-feldspars is assessed on samples from the Aar metagranite, Central Alps, Switzerland having very tight independent geological constraints.
Hanchar, John M., Villa, Igor Maria
core   +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

The Effects of Mixed Source Fertilizer Application on Vertisol Fertility and Growth of Mustard [PDF]

Journal of Tropical Soils, 2017
Soil fertility is a crucial factor determining the growth and yield of plants. The increase of nutrient content and availability in soil can be achieved by fertilization.
Jauhari Syamsiyah, Sumarno, Suryono, Nur Echsan Muhamat Rajab, Ida Aryaningrum   +4 more
doaj   +1 more source