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The illitization of dickite: chemical and structural evolution of illite from diagenetic to metamorphic conditions
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SYSNO ASEP 0324677 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The illitization of dickite: chemical and structural evolution of illite from diagenetic to metamorphic conditions Title Illitizace dickitu: chemický a strukturní vývoj illitu za diagenetických až metamorfních podmínek Author(s) Ruiz Cruz, M. D. (ES)
Rodrígues, M. D. (ES)
Novák, Jiří Karel (GLU-S) RID, SAISource Title European Journal of Mineralogy. - : Copernicus - ISSN 0935-1221
Roč. 21, č. 2 (2009), s. 361-372Number of pages 12 s. Publication form WWW - WWW Language eng - English Country DE - Germany Keywords Betic-Rif Cordillera ; anchizone ; dickite ; illite ; Na-K white mica ; TEM/AEM Subject RIV DB - Geology ; Mineralogy CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000265595000008 EID SCOPUS 67649550767 DOI 10.1127/0935-1221/2009/0021-1915 Annotation The illitization process of dickite was evidenced at diagenetic to low-grade metamorphic conditions in Triassic sedimentary rocks from the Betic-Rif Cordillera, whereas the transformation of kaolin-group minerals into illite was commonly described in deeply burried sandstone sequences. Dickite is well-ordered diagenetic phase that occurs filling the secondary porosity in sandstones and conglomerates. In diagenetic conditions, the alteration of dickite to illite produces thin 1M mica crystals with incomplete interlayer occupancy (illite), wide chemical variability, and low Na contents. Under low anchizonal conditions, the illitization process is more advanced and 2M1 K-illite coexists with minor dickite, sudoite, and 1M intermediate Na-K-illite. At higher anchizonal conditions only relics of dickite persist, whereas pyrophyllite coexists with 2M1 illite/muscovite with K-rich composition, indicating an approach to equilibrium. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2009
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