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NEW DATA ON MINERALS WITH ECONOMIC POTENTIAL PRESENT IN LITHIUM PEGMATITES FROM CON?U – NEGOVANU, CIBIN (CINDREL) MOUNTAINS, CENTRAL GROUP, SOUTHERN CARPATHIANS, ROMANIA
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N. Calin; C. Constantina; D. Per?a
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10.5593/sgem2023/1.1
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1314-2704
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English
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23
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1
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• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA |
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In this paper will discuss the minerals present in pegmatites, seen as a way of storing chemical elements, important from an economic point of view. The study area is called Con?u - Negovanu, and is located between the two mountain massifs known as Cindrel (Cibin) and Lotru Mountains. Muscovite (seen as a possible indicator for lithium in Con?u – Negovanu pegmatites), one of the important minerals alongside quartz, spodumene, and albite cleavelandite variety, is probably the mineral that includes in its structure chemical elements: Fe3+, Fe2+, Mg2+, Mn2+, Ti, Li, Nb, Ta, Sn, Ce, K, Na, Ca2+ which tend to materialize in minerals such as triphylite - lithiophilite, ferrisicklerite, heterosite - purpurite, amblygonite – montebrasite, "ferrogatehouseite", fluorapatite, hydroxylapatite, vivianite, wolfeite, maricite, monazite, cassiterite, titanite, spodumene, cookeite. In addition to these, we indicate beryl, scarce schorl, uraninite, garnets, kyanite, staurolite and columbite - group minerals. Phyllosilicates viewed through the mineralogical prism of pegmatites provide information on crystallization, mainly temperature (the presence of the 2M1 polytype indicates a high temperature) and the evolution pressure of pegmatitic melts. Plagioclase (oligoclase and albite) is partially or replaced by muscovite and quartz - a stable association in the later stages of pegmatites, following the crystallization of microcline by reducing the formation of muscovite, and if there is an increase in water content, the proportion changes, the microcline is partially or replaced of muscovite. Chemical analysis: EPMA indicates in muscovite the presence of FeO with an average value of 1.44 %, and Na2O with an average value of 0.44 %, fluorine occurs in proportions with values from 0.04 to 0.30 %.
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conference
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
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23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 03 - 09 July, 2023
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
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85-92
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03 - 09 July, 2023
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website
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9000
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Con?u – Negovanu pegmatites, green muscovite, green spodumene, green beryl, cassiterite
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