Results 1 to 10 of about 50,959 (268)

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

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

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

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

Petrological features of picrobasaltic melts on Lanzarote, Canary Islands [PDF]

open access: yesE3S Web of Conferences, 2021
The paper discusses issues related to the petrology of picrobasaltic melts forming lava flows on Lanzarote, Canary Islands. During ascientific and educational expedition on the aforementioned island, lava flows of picro basalt of the third phase of the ...
Canhimbue L.S.   +2 more
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

Relationship between Degree of Deformation in Quartz and Silica Dissolution for the Development of Alkali-Silica Reaction in Concrete. [PDF]

open access: yes, 2017
This paper presents research on the influence of quartz deformation in aggregates for the development of the alkali-silica reaction in concrete and its relationship with silica dissolution.
Dal Molin, Denise   +4 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

Design and Assessment of an Interactive Digital Tutorial for Undergraduate-Level Sandstone Petrology [PDF]

open access: yes, 2003
This study describes the goals, features and effectiveness of a digital interactive tutorial which was created to provide undergraduates a 'virtual microscope' resource for learning sandstone petrology.
Earle McBride   +3 more
core   +1 more source

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