Results 11 to 20 of about 26,237 (314)

Loading rate dependence of permeability evolution in porous aeolian sandstones [PDF]

, 2004
Mechanical properties of rocks are characterized by their notable dependence on the applied deformation rate. However, little is known about the strain rate dependence of fluid flow properties since most laboratory tests are conducted using a single ...
Ira O. Ojala, Ian G. Main, Main, Ian G, Bryne T. Ngwenya, Ojala, Ira O, Ojala, I. O., Ngwenya, B. T., Main, I. G.; id_orcid, Ngwenya, Bryne T   +8 more
core   +1 more source

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

Muhandisī-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, S.A. Tabatabaei-Nezhad, E. Khodapanah   +2 more
doaj   +1 more source

Permeability evolution during progressive development of deformation bands in porous sandstones [PDF]

, 2003
Triaxial deformation experiments were carried out on large (0.1 m) diameter cores of a porous sandstone in order to investigate the evolution of bulk sample permeability as a function of axial strain and effective confining pressure. The log permeability
Kwon, O., I. G. Main, B. T. Ngwenya, S. C. Elphick, Ngwenya, B. T., Elphick, S. C., Main, I. G.; id_orcid, O. Kwon   +7 more
core   +1 more source

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

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, Yang Xiaobin, Liu Junjia, Chen Xunlu   +3 more
doaj   +1 more source

Surface and Subsurface Damage Caused by Bullet Impacts into Sandstone

Geosciences, 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, Tom Blenkinsop, Oscar Gilbert, Lisa Mol   +3 more
doaj   +1 more source

Chlorite in sandstones [PDF]

, 2020
Chlorite, an Fe- and Mg-rich aluminosilicate clay, may be either detrital or authigenic in sandstones. Detrital chlorite includes mineral grains, components of lithic grain, matrix and detrital grain coats.
Griffiths, Josh, Armitage, Peter, Worden, Richard, Wooldridge, Luke, Utley, James, Simon, Naboth, Lawan, Auwala Yola, Muhammed, Dahiru   +7 more
core   +1 more source

Complex examination of the Upper Paleozoic siliciclastic rocks from southern Transdanubia, SW Hungary—Mineralogical, petrographic, and geochemical study [PDF]

, 2007
A vertical section of Upper Paleozoic sandstones from southern Transdanubia (Mecsek-Villány area, Tisza mega-unit, Hungary) has been analyzed for major and trace elements, including rare earth elements (REEs).
Nesbitt, Preston, Varga, Andrea, Csontos, Varga, Fedo, Awdankiewicz, Gaillardet, Máthé, Zoltán, Cullers, Árgyelán, Tibor, Biscaye, Garver, Huang, Nagy, Józsa, Sándor, Pearce, Raucsik, Béla, Haas, Balogh, Brügel, Cox, Lee, Zimmermann, Kübler, Willan, Watanabe, Golonka, Szakmány, György, Árkai, Bauluz, Bhatia, Fazekas, Arribas, Noda   +34 more
core   +1 more source

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

Литосфера, 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, N. V. Sennikov, A. L. Anfimov, N. K. Bakharev, N. G. Izokh   +4 more
doaj   +2 more sources

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

Meitan 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, Ying XU, Qiangqiang ZHENG, Meilu YU, Shoudong XIE, Chengjie LI   +5 more
doaj   +1 more source

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

Известия 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