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Alteration halos around radioactive minerals in plutonic and metamorphic rocks of the northern Moldanubian area, Bohemian massif
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SYSNO ASEP 0368278 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Alteration halos around radioactive minerals in plutonic and metamorphic rocks of the northern Moldanubian area, Bohemian massif Tvůrce(i) Procházka, V. (CZ)
Seydoux-Guillaume, A.-M. (FR)
Trojek, T. (CZ)
Goliáš, V. (CZ)
Korbelová, Zuzana (GLU-S) RID, SAI
Matějka, D. (CZ)
Novotná, P. (CZ)Zdroj.dok. European Journal of Mineralogy. - : Copernicus - ISSN 0935-1221
Roč. 23, č. 4 (2011), s. 551-566Poč.str. 16 s. Forma vydání WWW - WWW Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova monazite ; granites ; paragneisses ; radiation damage ; alteration Vědní obor RIV DB - Geologie a mineralogie CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000296565700006 EID SCOPUS 80054030640 DOI 10.1127/0935-1221/2011/0023-2108 Anotace Effects of strongly radioactive primary minerals (mainly monazite) on the surroundings are compared in various rocks of the Moldanubian area. Aureoles of secondary phases formed which extend up to 20 µm from the monazite surface. They mainly consist of low temperature clay minerals usually mixed with Fe-hydroxides; in some samples pyrite is common too. The halos of secondary phases most commonly occur around monazite in cordierite, but also in plagioclase and in quartz. It seems that the radioactivity promotes reactions of the primary minerals with fluid (fluid inclusions and H2O in channels of the cordierite structure) even at ‘‘static’’ conditions. The frequent association of monazite with hydrated secondary phases may contribute significantly to resetting monazite ages during metamorphism and partial melting. In addition, the neglecting of the chemical transformation of the nuclear energy for the calculations of radioactive heat production and heat budgets of rocks is questioned. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2012
Počet záznamů: 1