Temat: Eu/Eu ratio - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Geochemistry of rare earth elements in the Baba Ali magnetite skarn deposit, western Iran – a key to determine conditions of mineralisation
Autorzy:: Zamanian, H.
Radmard, K.
Powiązania:: https://bibliotekanauki.pl/articles/94484.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: Almoughlagh
Ce/Ce ratio
Eu/Eu ratio
La/Y ratio
stosunek Ce/Ce
stosunek Eu/Eu
stosunek La/Y
Opis:: The Baba Ali skarn deposit, situated 39 km to the northwest of Hamadan (Iran), is the result of a syenitic pluton that intruded and metamorphosed the diorite host rock. Rare earth element (REE) values in the quartz syenite and diorite range between 35.4 and 560 ppm. Although the distribution pattern of REEs is more and less flat and smooth, light REEs (LREEs) in general show higher concentrations than heavy REEs (HREEs) in different lithounits. The skarn zone reveals the highest REE-enriched pattern, while the ore zone shows the maximum depletion pattern. A comparison of the concentration variations of LREEs (La–Nd), middle REEs (MREEs; Sm–Ho) and HREEs (Er–Lu) of the ore zone samples to the other zones elucidates two important points for the distribution of REEs: 1) the distribution patterns of LREEs and MREEs show a distinct depletion in the ore zone while representing a great enrichment in the skarn facies neighbouring the ore body border and decreasing towards the altered diorite host rock; 2) HREEs show the same pattern, but in the exoskarn do not reveal any distinct increase as observed for LREEs and MREEs. The ratio of La/Y in the Baba Ali skarn ranges from 0.37 to 2.89. The ore zone has the highest La/Y ratio. In this regard the skarn zones exhibit two distinctive portions: 1) one that has La/Y >1 beingadjacent to the ore body and; 2) another one with La/Y < 1 neighbouring altered diorite. Accordingly, the Baba Ali profile, from the quartz syenite to the middle part of the exoskarn, demonstrates chiefly alkaline conditions of formation, with a gradual change to acidic towards the altered diorite host rocks. Utilising three parameters, Ce/Ce*, Eu/Eu* and (Pr/Yb)n, in different minerals implies that the hydrothermal fluids responsible for epidote and garnet were mostly of magmatic origin and for magnetite, actinolite and phlogopite these were of magmatic origin with low REE concentration or meteoric water involved.
Źródło:: Geologos; 2016, 22, 1; 33-47
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Financial Security of the Public Sector Versus the Indebtedness of Local Self-Government
Autorzy:: Nogalski, Bogdan
Kozłowski, Andrzej
Czaplicka-Kozłowska, Iwona Zofia
Powiązania:: https://bibliotekanauki.pl/articles/1374863.pdf
Data publikacji:: 2018
Wydawca:: Wyższa Szkoła Policji w Szczytnie
Tematy:: financial security
public debt
EU funds
gearing ratio
local self-government
Opis:: The 19th and 20th century in the history of Poland was primarily a time of foreign domination by neighbouring countries, mainly Russia and Germany. Except for the inter-war period of 1918–1939 when there was an attempt to rebuild an independent country, Polish culture in its social and economic dimension underwent a vicious destruction for almost 2 centuries. For that reason, political changes initiated in Poland in 1989 resulted in the emergence of new hope for the revival of its sovereignty and its restoration as a sovereign and democratic country. After years of enslavement the regenerated Poland was economically weak in almost all its dimensions. Due to decisions made in the 1990s and the first years of the 21st century there was a hope for a clear acceleration of social and economic growth. The activities required the necessity of implementation of economic and rational procedures in financial management as well as the allocation of huge financial resources mainly for investment in the area of public utilities, and also for the implementation of modern technologies and methods in nearly all areas of economic and social life. The article is dedicated to the problem of the financial security of the country in relation to the burdens of debt of local authorities, particularly those at the lowest level of the governance structure of the country. Assuming that local authorities in the Polish legal system are public-legal unions equipped with a legal identity that act in their own name and at their own responsibility, it is the members of organisations who are directly responsible for an excessive indebtedness which can affect not only the financial security of the whole public-legal union which is a local self-government, but also the financial security of citizens.
Źródło:: Internal Security; 2018, 10(1); 227-242
2080-5268
Pojawia się w:: Internal Security
Dostawca treści:: Biblioteka Nauki

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