Experimental research into the effect of some operation factors and rock properties on the rate of penetration [PDF]
, 2020 Purpose. The purpose of this research is to investigate the effect of weight on bit (WOB), rotary speed (RPM), and some rock properties on the rate of penetration (ROP). Methods.
Ali, Mahrous A.M. +4 more
core +1 more source
The Influence of Radiation on Confinement Properties of Nuclear Waste Glasses
Science and Technology of Nuclear Installations, 2020 Self-irradiation can affect durability of glasses used to immobilize high-level nuclear waste (HLW). The stability of glasses can also be indirectly affected by the radiolytic changes in contact water leading to decrease in its pH although this is ...
Viktor I. Malkovsky +3 more
doaj +1 more source
Cupriferous basalts of the Northern Urals
Литосфера, 2017 Characteristics and distinctive features of cupriferous basalts in the world are given. Deposits of the Superior Lake in the United States are considered as a reference.
S. Savchuk Yury +2 more
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Литосфера, 2019 Research subject. Sphalerite (ZnS) is a widespread mineral that can be found in various depositional environments. During formation, this mineral can accumulate minor and trace impurities, with gold being one of the most valuable component.
D. E. Tonkacheev +5 more
doaj +1 more source
Известия высших учебных заведений: Геология и разведка, 2017 A wide range of the temperatures of hydrothermal fluid regime (430-103 °C) has been revealed in the result of microthermometric study of the fluid inclusions in the minerals of pre-ore and post-ore stages developed at the Elkon deposit.
M. M. Komarova +3 more
doaj +1 more source
Investigation of isotopes of ice in the Askinskaya and Kinderlinskaya caves (Southern Urals)
Лëд и снег, 2023 The aim of this work was to determine mechanisms of formation of perennial ice in caves of the Southern Urals, as well as to find sources of water and processes responsible for the formation of isotopic parameters of the cave ice.
Ju. N. Chizhova +3 more
doaj +1 more source
Provenance history of a Late Triassic-Jurassic Gondwana margin forearc basin, Murihiku Terrane, North Island, New Zealand: petrographic and geochemical constraints [PDF]
, 2004 The Murihiku Terrane in the North Island was a forearc basin adjacent to a volcanic arc along the eastern margin of Gondwana during the Mesozoic. The rocks that infill the basin are mainly volcaniclastic sandstones and mudstones, often turbiditic, with ...
Briggs, Roger M. +2 more
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Marcasite at the Permian‐Triassic Transition
Geophysical Monograph Series, Page 377-399., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Elena Lounejeva +7 more
wiley +1 more source
Petrographical Analysis of Warthian Fuvioglacial Gravels as a Tool to Trace the Source Area – A Case Study From Central Poland [PDF]
, 2014 The petrographical features of the medium- and coarse-grained gravels (4-10 mm and 20-60 mm, respectively) of weathered and fresh (unweathered) deposits indicate, in combination with so-called indicator and statistical erratics, that two glacial lobes ...
Górska-Zabielska, Maria +1 more
core +2 more sources
Distribution of natural radionuclides in the soils on the territory of the New Moscow
Известия высших учебных заведений: Геология и разведка, 2019 The paper is devoted to the question of natural radionuclides (40K, 238U, 232Th) distribution in the soils on the territory of New Moscow. Based on the processing of the results of aero-gamma-spectrometry and analysis of extensive cartographic material ...
A. S. Guseva +2 more
doaj +1 more source