Results 11 to 20 of about 6,407 (264)

Pore Space Quantification of Three Sandstones Binary Micro CT Images [PDF]

open access: yesMuhandisī-i manābi̒-i ma̒danī
The pore geometry and topology properties of rocks are significant for a better understanding of the complex hydrologic and elastic properties. If the complexity of porous media is considered, reliable results can achieve. In three-dimensional imaging of
M. Ashrafi   +2 more
doaj   +1 more source

Confining pressure effect on energy parameters of sandstones based on damage evolution

open access: yes矿业科学学报, 2020
The characteristic parameters corresponding to damage evolution state of rock material are crucial to designing, predicting and monitoring the stability of geotechnical engineering.The cyclic loading-unloading triaxial compression tests of sandstones ...
Cheng Hongming   +3 more
doaj   +1 more source

Surface and Subsurface Damage Caused by Bullet Impacts into Sandstone

open access: yesGeosciences, 2021
The shift of armed conflicts to more urbanised environments has increased the risk to cultural heritage sites. Small arms impacts are ubiquitous in these circumstances, yet the effects and mechanisms of damage caused are not well known.
Oliver Campbell   +3 more
doaj   +1 more source

Calclithites of the Krosno zone in the East Carpathians (Ukraine)

open access: yesВісник Київського національного університету імені Тараса Шевченка. Серія Геологія, 2017
Results of carbonates distribution in the flysch rocks of the Krosno Zone (Ukrainian Carpathians), which are composed mainly by interstratification of sandstones, argillites and aleurolites, and sporadically limestones, dolostones and marls as well as ...
V. Guliy   +5 more
doaj   +1 more source

Devonian organogenic buildings of the Urals and adjacent regions of East-Europian Platform and West Siberian

open access: yesЛитосфера, 2015
Several reef-building systems occurred during Cambrian-Devonian on the Urals and adjacent regions of the East-European Platform. The first phase was manifested in the Lower Cambrian within a limited area of the western slope of the Urals.
B. I. Chuvashov   +4 more
doaj   +2 more sources

Experimental study on strength degradation and meso-structural characteristics of saturated sandstone under freeze-thaw cycles

open access: yesMeitan kexue jishu
Freeze-thaw damage to rock masses on slopes constitutes a major hazard in open-pit mining operations, particularly in the cold regions of the western area.
Haotian XIE   +5 more
doaj   +1 more source

Composition and formation conditions of the Upper Riphean terrigenous rocks (Dzhezhimparma Uplift, Southern Timan)

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2017
The results of the study of the composition of the Upper Riphean terrigenous rocks of Dzhezhimparma Uplift at Southern Timan have been presented. On the basis of the lithological, geochemical and mineralogical data, the sedimentary material has been ...
N. Yu. Nikulova
doaj   +1 more source

The concentration of molybdenum and copper in rocks, soils and plants in the area of Jabłonki (Eastern Beskids Mts.) / Zawartość molibdenu i miedzi w skałach, glebach i roślinach w okolicy Jabłonek (Beskidy Wschodnie)

open access: yesEnvironmental Protection and Natural Resources, 2013
Molibden jest jednym z podstawowych mikroelementów dla roślin, ale jego nadmiar w glebach przy niedoborze miedzi może prowadzić do produkcji pasz, które mogą być toksyczne dla zwierząt i powodować molibdenozę.
Stojek Małgorzata
doaj   +1 more source

Geochemical features and paleogeodynamic setting of permian and triassic deposits accumulation in the South of the Laoeling-Grodekovo terrane (Primorye)

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2021
New geochemical data on the Late Paleozoic and Early Mesozoic sandy rocks of the southern part of the Laoeling-Grodekovo terrane of the South-Western Primorye are presented. It is shown that terrane deposits differ significantly in geochemical parameters:
Malinovsky A.I.
doaj   +1 more source

Petrophysical characteristics of the sandstones used in the construction of the Monumental Heritage of Ciudad Rodrigo, Salamanca. Spain

open access: yesMateriales de Construccion, 2003
Knowledge of the petrophysical characteristics of stones used in construction is evidently advantageous in the sense that it can help avoid wasting time and future disappointments when attempting to assess the results both in restoration work and in ...
M. J. Varas, E. Molina, M. A. Vicente
doaj   +1 more source

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