Toselli, A. J. creator text Artículo ag monographic spa

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Illite crystallinity is the criteria used to assess the degree of metamorphism of paleozoic pelitic rocks from Negro Peinado and Volcáncito formations from the Famatina; Puncoviscana formation from Cordillera Oriental; Falda Cienega formation from Puna and Suncho formation from Sierras Pampeanas. -The metamorphism correspond to the anchizone (anchimetamorphismor very low grade metamorphism). -The cristallinity of illite has been determined in sedimentation samples of different grain size (2u; 2-6, 3u and 6,3u).-The peak with at halt heght (Hb) of the (001) reflection serves as a measure of cristallinity and the value of relative Halbwertsbreite (Hbrel) by the fraction 2u defined the level for the metamorphism. An external quartz standard has been used. Relevamiento: 1981. Diagenesis Metamorfismo Sedimentología NOA 0326-9817 no.4,. p.19-26 AR-SsjUBGM 251215 20251220110811.0 40374