000153221 001__ 153221
000153221 005__ 20251017144642.0
000153221 0247_ $$2doi$$a10.3390/min15040416
000153221 0248_ $$2sideral$$a143715
000153221 037__ $$aART-2025-143715
000153221 041__ $$aeng
000153221 100__ $$0(orcid)0000-0002-4970-6333$$aBauluz, Blanca$$uUniversidad de Zaragoza
000153221 245__ $$aThe Burela Kaolin Deposit (NW Spain): Genesis, Composition and Micro- and Nanotexture
000153221 260__ $$c2025
000153221 5060_ $$aAccess copy available to the general public$$fUnrestricted
000153221 5203_ $$aA set of samples from the Monte Castelo kaolin deposits (Burela, NW Spain), corresponding to igneous acidic rocks affected by chemical weathering with variable intensity have been investigated in order to establish the mineralogical and chemical changes with weathering, and the micro- and nano-scale textures developed. For the study, XRD, FESEM, HRTEM and chemical analyses have been used. The more intense the weathering, the more the dissolution of aluminosilicates (albite, K feldspars and K micas) and the crystallization of kaolinite is favored. Kaolinite grows, forming booklets and generating a fine-grained matrix and, along the cleavages of muscovite, forming mica–kaolinite intergrowths. Bidimensional crystallographic continuity between mica and kaolinite has been observed and no intermediate phases have been identified as a consequence of the high W/R ratio. Kaolin mainly contains kaolinite with high crystallinity; however, when there are quartz impurities, they interfere with the ‘optimal’ reflections for the calculation of the Hinckley index. In this case, the use of the AGFI index almost eliminates the effect that the relative intensities of the quartz and feldspar impurities may have on those of kaolinite. With weathering, there is a progressive decrease in the contents of most chemical elements, except Al, TiO2, HREEs, Ta, Hf, Th, U, V, Cr, S, Zr, Mo and Sn.
000153221 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E18-20R$$9info:eu-repo/grantAgreement/ES/MCIU/PID2021-123127OB-I00
000153221 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000153221 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000153221 700__ $$0(orcid)0000-0002-2169-4561$$aYuste, Alfonso$$uUniversidad de Zaragoza
000153221 700__ $$aAlvira, Sergio
000153221 700__ $$aGarcía-Vicente, Andrea
000153221 7102_ $$12000$$2120$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Cristalografía Mineralog.
000153221 773__ $$g15, 4 (2025), 416 [14 pp.]$$pMinerals (Basel)$$tMinerals$$x2075-163X
000153221 8564_ $$s4793857$$uhttps://zaguan.unizar.es/record/153221/files/texto_completo.pdf$$yVersión publicada
000153221 8564_ $$s2524181$$uhttps://zaguan.unizar.es/record/153221/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000153221 909CO $$ooai:zaguan.unizar.es:153221$$particulos$$pdriver
000153221 951__ $$a2025-10-17-14:32:42
000153221 980__ $$aARTICLE