Results 81 to 90 of about 35,562 (308)

New constraints on the postglacial evolution of Lago Maggiore, Northern Italy

Journal of Quaternary Science, EarlyView.
ABSTRACT Lago Maggiore is situated in an overdeepened valley reach at the southern margin of the European Alps, and its thick sediment infill allows the reconstruction of the postglacial valley and lake evolution. We study here the sedimentary succession in the lower Ossola Valley, which is infilled by ~500 m of deposits. In a marginal position, a core
Lukas Gegg, Alexander Fülling, Andrew Greenwood, György Hetényi, F. Martin Hofmann, Giovanni Monegato, Jahir S. Rangel Herrera, Camille Schirra, Marco Venier, Othmar Müntener   +9 more
wiley   +1 more source

The Use of Saudi Silspar as a Ceramic Raw Material

Mining
Feldspar 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, Ahmad M. Al-Saleh, Talal Ghazi Alharbi   +2 more
doaj   +1 more source

Experimental Evaluation and Optimisation of Sealed‐Tube Combustion Methods for Silicate Nitrogen Extraction [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Nitrogen (N) abundance and isotopic compositions in silicate rocks are commonly measured by sealed‐tube continuous‐flow isotope ratio mass spectrometry (CF‐IRMS), but combustion protocols vary widely. It remains uncertain how the quality of data obtained from different published methods compares for differing sample types. Methods To
Holland F, Mikhail S, Wong K, Baidya A, Stüeken E.   +4 more
europepmc   +2 more sources

Late Quaternary lake filling and drying in northern Australia's largest freshwater lake

Journal of Quaternary Science, EarlyView.
ABSTRACT Lake Woods, Jurrkulu, is northern Australia's largest freshwater lake filled today in strong Indo–Australian summer monsoons (IASM) to maximum depths of ~5 m. On the western margins of the lake, two large arcuate ridges occur 20 to 40 m above the lake floor and inset within these are other mid‐elevation lake deposits, such as depositional ...
Tim J. Cohen, Zenobia Jacobs, Caitlyn Scobie, Sam Marx, William Reynolds, Matthew S. Forbes, Haidee Cadd, Xue Rui, Laura Mogensen, Alexandru Codilean, Réka H. Fülöp, Klaus M. Wilcken, Fabian Boesl, Alex F. Wall, Nicola Stromsoe   +14 more
wiley   +1 more source

The microstructural representation and fractal nature intepolation analysis of feldspar [PDF]

Science of Sintering
This 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., Radosavljević-Mihajlović Ana, Milošević Mimica R., Đorđević Nataša G., Marković Bojana, Grubišić Mirko, Vlahović Branislav   +6 more
doaj   +1 more source

Corrosion of Potential Canister Materials During Oxic to Anoxic Transient in Compacted Bentonite

Materials and Corrosion, EarlyView.
A comprehensive analytical approach was applied to investigate material degradation phenomena of cast iron and copper as potential canister materials for the safe disposal of high‐level radioactive waste, as well as compacted bentonite exposed to artificial water relevant for disposal. ABSTRACT The long‐term performance of the engineered barrier system
Louisa Panjiyar, Martin Ende, Nicolas Finck, Christiane Stephan‐Scherb   +3 more
wiley   +1 more source

Ruby from Longido, Tanzania: Mining, Color, Inclusion, and Chemical Features

Crystals
This 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, Mingyue He, Andrew Christopher Lucas, Xueying Sun, Dan Zhou, Tiantian Huang, Kai Li, Darwin Fortaleché, Moqing Lin, Yuan Zhu, Xiaoting Jin   +10 more
doaj   +1 more source

The complexity of sediment recycling as revealed by common Pb isotopes in K-feldspar

, 2018
© 2018 China University of Geosciences (Beijing) and Peking University. Detrital zircon U–Pb geochronology has become the gold standard in evaluating source to sink relationships in sedimentary basins.
Noreen Evans (23287510), Christopher Kirkland (23290549), Brad McDonald (23436157), H. Cutten (23311663), S. Johnson (3832045)   +4 more
core  

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

K-feldspar hygrochronology [PDF]

, 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