Results 1 to 10 of about 167,615 (303)

History of the First Ore Prospecting Expedition of 1491 in the Arctic Zone of the Russian State

open access: yesАрктика и Север, 2022
In the Middle Ages, the Russian state, formed around Moscow, was in dire need of metals. However, only comparatively poor quality swamp iron was mined on the territory of the Russian principalities.
Konstantin V. Lobanov   +3 more
doaj   +1 more source

FAHLORES FROM PORPHYRY Cu-(Mo) DEPOSITS OF THE URALS [PDF]

open access: yesМинералогия, 2022
The paper describes chemistry of tetrahedrite-tennantite group minerals from three porphyry deposits of the Urals: Mikheevskoe and Tomino porphyry copper deposits on the South Urals and Talitsa Mo porphyry deposit on the Middle Urals.
O.Yu. Plotinskaya, E.V. Kovalchuk
doaj   +1 more source

The First Scientific Expeditions to the Bering Strait and to the Russian Colonies in America

open access: yesАрктика и Север, 2022
Based on the geographical atlases of the 16th century, the German scientist G. Leibniz proposed to Peter I a project aimed at discovering a strait between Asia and America, studying the Earth’s magnetic field, cartographic and other research in Russia ...
Aleksandr Ya. Dokuchaev   +4 more
doaj   +1 more source

Paleomagnetism of the early carboniferous thickness of Tuva [PDF]

open access: yesRussian Journal of Earth Sciences, 2022
Paleomagnetic studies of the early Carboniferous strata of Tuva have been carried out. As a result of the component analysis, post-folding secondary and pre-folding, probably close to the primary components of magnetization, were identified in them ...
Kovalenko D., Buzina M.
doaj   +1 more source

REE-Nb MINERALIZATION IN TRACHYTES AND RHYOLITES OF THE KHULAM VOLCANO-PLUTONIC COMPLEX, NORTH CAUCASUS [PDF]

open access: yesМинералогия, 2021
The paper presents the first data on the composition of REE and Nb mineralization in the Middle Jurassic moderately alkaline felsic and moderately acid rocks of the Khulam volcano-plutonic complex at the territory of Kabardino-Balkaria, central part of ...
E.N. Kaigorodova   +3 more
doaj   +1 more source

X-ray absorption spectroscopy study of the chemistry of «invisible» Au in arsenian pyrites [PDF]

open access: yesE3S Web of Conferences, 2019
Arsenian pyrite is an abundant mineral occurring in many geological settings at the Earth’s surface, including hydrothermal ore deposits which are the main source of Au.
Filimonova Olga   +8 more
doaj   +1 more source

GEO-ENERGETICS OF UKRAINIAN SHIELD [PDF]

open access: yes, 2018
The analysis and systematization of geodynamic conditions of underground mining of ore deposits in Ukraine is executed.
KHOMENKO, Oleh   +9 more
core   +2 more sources

Investigation of muck drawing in blocks with trapezoid sills [PDF]

open access: yes, 2018
The article is aimed at determining regularities of muck drawing in blocks and developing the technology of enhancing of muck ore parameters through shaping a trapezoid block sill. To confirm the suggested assumptions,
Kalinichenko, Olena, Stupnik, Mykola
core   +1 more source

Utilization of flotation in copper extraction from polymetallic ore [PDF]

open access: yes, 2020
The aim of this study was to examineflotation of utility metals from poor polymetallic ores and verify the potential for profitable yields in connection withpotentially economic deposits of non-ferrous metals.The paper describes results in ...
Janáková, Iva   +2 more
core   +1 more source

The Influence of Radiation on Confinement Properties of Nuclear Waste Glasses

open access: yesScience 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

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