Results 21 to 30 of about 10,620 (270)
Effect of chemically induced fracturing on the ice nucleation activity of alkali feldspar [PDF]
Atmospheric Chemistry and Physics, 2021 Feldspar is an important constituent of airborne mineral dust. Some alkali feldspars exhibit particularly high ice nucleation (IN) activity. This has been related to structural similarities of the ice (101‾0) prism planes and the (100) planes of alkali ...
A. A. Kiselev +7 more
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Литосфера, 2017 The ophiolites of the northern slope of the Kuznetsk-Alatau Ridge are the most representative fragments of the sub-oceanic crust in the region. In this article, we present the results of a study of the metabasites from ophiolite paragenesis of the ...
N. A. Dugarova +3 more
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Spheroidal weathering of basalt from Gebel Qatrani, Fayum Depression, Egypt
Bulletin of the National Research Centre, 2021 Background Three stages of basalt weathering are known: early or incipient weathering, intermediate weathering and advanced weathering. The Late Oligocene basalt of Gebel Qatrani in Fayum Depression, Egypt, shows signs of early weathering, particularly ...
Essam El-Hinnawi +2 more
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Weathering microenvironments on feldspar surfaces: implications for understanding fluid-mineral reactions in soils [PDF]
, 2008 The mechanisms by which coatings develop on weathered grain surfaces, and their potential impact on rates of fluid-mineral interaction, have been investigated by examining feldspars from a 1.1 ky old soil in the Glen Feshie chronosequence, Scottish ...
Smith, C.L. +13 more
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The Alvarrões-Gonçalo Li project: an example of sustainable lithium mining [PDF]
Advances in Geosciences, 2018 Across Europe, small scale deposits of critical materials and/or strategic elements, such as W, Li and Sn, are not viable to mine and process using the traditional large scale mining and processing technologies due to their geological characteristics.
R. Sousa +8 more
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Trace elements in some Finnish pegmatitic potassium feldspars [PDF]
Bulletin of the Geological Society of Finland, 1968 Thirty eight potassium feldspar samples from pegmatites were analyzed for K, Na, Ca, Fe, Rb, Sr, Cs, Ba and Pb. The X-ray fluorescence method used and the distribution of the trace elements are described and discussed.
R. Lappalainen, K.J. Neuvonen
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Bacterial assimilation reduction of iron in the treatment of non-metallics [PDF]
Acta Montanistica Slovaca, 2005 Natural non-metallics, including granitoide and quartz sands, often contain iron which decreases the whiteness of these raw materials. Insoluble Fe3+ in these samples could be reduced to soluble Fe2+ by bacteria of Bacillus spp.
Peter Malachovský +3 more
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Land, 2022 The contribution of non-exchangeable soil K in the total K availability may be essential to K deficient soils; however, less attention has been paid so far for proposing soil tests that assess the bioavailable structural K that is solubilized by soil ...
Fotis Bilias +3 more
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Partitioning of barium between coexisting K-feldspars and plagioclase in the Bushveld granites from the Zaaiplaats area, South Africa [PDF]
Bulletin of the Geological Society of Finland, 1984 The barium contents of the coexisting K-feldspars and plagioclases in the Bushveld granites from the Zaaiplaats tin mine area were determined by electron microprobe analyses.
J.T. Ollila
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Frontiers in Earth Science, 2023 The behaviour of Group I and II elements during the petrogenesis of felsic igneous rocks is largely controlled by feldspar-liquid relationships. Numerous experimental studies have addressed plagioclase/melt element partitioning, with fewer studies ...
Olaya Dorado +4 more
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