Zobrazeno 1 - 10
of 300
pro vyhledávání: '"Geochemical composition"'
Autor:
Kupriyanova E.V., Solomonova M.Yu., Trubitsyna E.D., Kashirskaya N.N., Filimonova M.O., Afonin A.S., Sharapov D.V., Ivanov S.N., Ryabogina N.E.
Publikováno v:
Вестник археологии, антропологии и этнографии, Iss 4(63), Pp 18-38 (2023)
An ash heap is defined as a specific object at an archaeological site, usually in the form of a separate hillock containing a layer of finely-dispersed greyish-yellow or ash-coloured soil. The existing assumptions about the formation and functional p
Externí odkaz:
https://doaj.org/article/e00fc188e9634a4a967baf0db87ad8f3
A comparative review of the mineralogical and chemical composition of African major bauxite deposits
Publikováno v:
Heliyon, Vol 9, Iss 8, Pp e19070- (2023)
Bauxite, which is the main raw material that aluminium is extracted from was discovered in Africa in the early 1900s. Currently, the production and export capacities of the African Bauxite ore are about a third of the World's total capacity. However,
Externí odkaz:
https://doaj.org/article/9fa6621770be4e54997123f9023c8e03
Autor:
Degtyareva A.D., Kuzminykh S.V.
Publikováno v:
Вестник археологии, антропологии и этнографии, Iss 4(59), Pp 29-42 (2022)
In this paper, the chemical composition of tools and ingots of the Petrovka Culture of the Southern Trans-Urals and Middle Tobol region is characterized with identification of main recipes of the alloys using several analytical methods (spectral, X-r
Externí odkaz:
https://doaj.org/article/2994d3e649404eff8c2f91a34a9ebab3
Publikováno v:
Desert, Vol 27, Iss 1, Pp 115-139 (2022)
Chemical indices are widely used for characterizing the degree of weathering. In this study, we focused on evaluating the capability of chemical weathering indices to distinguish the sequence of aeolian-fluvial sediments in an arid region of Iran. Se
Externí odkaz:
https://doaj.org/article/2d6cd5f1f58a4c519ff5d280256cbb2a
Autor:
Snowie Jane C. Galgo, Victor B. Asio
Publikováno v:
Eurasian Journal of Soil Science, Vol 11, Iss 2, Pp 113-125 (2022)
Highly weathered soils are widepsread in the humid tropics. These soils are deep, clayey, and reddish and contain scant amounts of nutrients like Si due to excessive leaching, heavy desilication-aluminization, and erosion owing to their slope gradien
Externí odkaz:
https://doaj.org/article/4a61249e8a5344afa1fa38dad388bc7d
Publikováno v:
Frontiers in Earth Science, Vol 11 (2023)
The major element composition of volcanic rocks carries important information about the source and differentiation processes affecting the magma, the physical properties that allow it to erupt, and its eruptive style. Although global rock geochemical
Externí odkaz:
https://doaj.org/article/3d5f6f6a8002421aa6b9e026173dd3c6
Autor:
Galina V. Kharina, Ludmila V. Aleshina
Publikováno v:
Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 333, Iss 2, Pp 173-183 (2022)
The relevance of the study is dictated by the need for constant environmental monitoring of environmental objects in the Sverdlovsk region, in particular, soils due to the high level of anthropogenic load on the territory. The purpose of the work is
Externí odkaz:
https://doaj.org/article/edfdc3ef89184bc0911740c8055730eb
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Fragmenta entomologica, Vol 54, Iss 1 (2022)
We used presence/absence data of 5,160 red wood ant nests (RWA; Formica polyctena) acquired in a systematic large-scale area-wide survey in two study areas (≈350 ha) in the Oberpfalz, NE Bavaria, Germany to explore for the first time the influence
Externí odkaz:
https://doaj.org/article/0837cb2698794d7196ca04a195e3d6d1
Autor:
Natalia Kulik, Natalia Efremenko, Vera Strakhovenko, Natalia Belkina, Galina Borodulina, Ekaterina Gatalskaya, Viktor Malov, Igor Tokarev
Publikováno v:
Water, Vol 15, Iss 5, p 964 (2023)
This paper presents the results of seasonal observations of the geochemical composition of the waters of the large tributaries of Lake Onego. The mineralogy and geochemistry of the suspended matter and the isotopic composition (oxygen-18 and deuteriu
Externí odkaz:
https://doaj.org/article/94c6ad7692b84f44b21e2713bdce65f3