Results 81 to 90 of about 34,282 (303)
The Use of Saudi Silspar as a Ceramic Raw Material
MiningFeldspar and quartz are essential ceramic raw materials, with feldspar acting as a flux and quartz as a structural filler. Feldspathic sand derived from granitic masses of the eastern Arabian Shield represents a promising local source.
Mohammed Al-Aqydy +2 more
doaj +1 more source
The microstructural representation and fractal nature intepolation analysis of feldspar [PDF]
Science of SinteringThis paper presents a comparative analysis of microstructural parameters by the powder X-ray diffraction method on a polycrystalline sample and the fractal analysis.
Milošević Dušan M. +6 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 talus rock glacier in Nantlle Valley, North Wales
Journal of Quaternary Science, EarlyView.ABSTRACT Landforms comprising mixtures of fine and coarse sediment and deposited during late glacial times are ubiquitous in the British mountains. In many cases, their interpretation has often proved contentious; as a result, the non‐generic term discrete debris accumulations (DDA) has been used to describe them and, over the last 50 years, some have ...
Stephan Harrison, Ed Anderson
wiley +1 more source
Experimental determination of plagioclase dissolution rates as a function of its composition and pH at 22°C. [PDF]
, 2014 The steady-state, far-from-equilibrium dissolution rates of nine distinct plagioclases ranging in composition from An2 to An89 were measured in mixed flow reactors at 22 ± 2 C and pH from 2 to 11.
Gudbrandsson S., Wolff-Boenisch D., Gislason S. R. and Oelkers E. H.
core +1 more source
Managing and visualising geochemical data for tephra correlation with the IntChron Integration Tool
Journal of Quaternary Science, EarlyView.ABSTRACT There is now a wealth of glass‐shard geochemical data for volcanic ash (tephra) layers from a wide range of volcanoes and eruptions, providing invaluable datasets for tephrochronology. However, compilation of published data to assess tephra correlations leads to large files and requires careful management.
Victoria C. Smith +5 more
wiley +1 more source
Ruby from Longido, Tanzania: Mining, Color, Inclusion, and Chemical Features
CrystalsThis article reports on the recent mining and production status of ruby in Longido, Tanzania. Faceted-grade rubies and their matrix from Longido Area, Tanzania, were investigated by standard gemological testing, including FTIR, UV-VIS, Raman spectra, and
Yujie Gao +10 more
doaj +1 more source
The effect of residual signal on dose measurements using MET-pIRIR signals from K-feldspar
, 2020 © 2020 Elsevier B.V. Overestimation in dose recovery results was observed at high doses (>1000 Gy) when a single-aliquot regenerative-dose (SAR) procedure is applied to the multiple-elevated-temperature post-IR IRSL (MET-pIRIR) signals from potassium ...
Xue Rui (1952827) +2 more
core
Journal of Quaternary Science, EarlyView.ABSTRACT An understanding of the terrestrial extent, retreat dynamics and climate–glacier coupling of ice masses during the Last Glacial Termination (LGT, ~18–11 ka) is often limited by a fragmentary geomorphological record and is dependent on precise, accurate and robust dating frameworks.
Alastair M. Curry +3 more
wiley +1 more source
Spanish Journal of Agricultural Research, 2019 Aim of study: To evaluate the use of compost and natural rocks as partial replacement of mineral fertilizers in ‘Flame’ seedless grape vineyards. Area of study: The present work was conducted during three successive seasons (2016, 2017 and 2018), being ...
Mohyeldein I. Slama +3 more
doaj +1 more source