Estudio quimiestratigráfico con fines prospectivos en el sector la Hoyada, parte 2.

Abstract

Abstract: Physical and chemical analysis of samples by X-Ray Fluorescence and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) provided detailed information on the composition of outcrops "a" and "b". The results indicate that column "a" is predominantly composed of calcareous black shales, black siltstones, limestones and volcanoclasts, while column "b" exhibits a composition that includes calcareous black shales, gray shales, calcareous black siltstones and black siltstones. ICP-MS analyses revealed anomalous concentrations of Sc 9.63 ppm, Zn 258.39 ppm, Pb 36.3 ppm and U 0.75 ppm, as well as subanomalies of V 102.10 ppm, Cr 46.31 ppm, Co 11.07 ppm, Cu41.06 ppm, Zr 2.43 ppm and Th 1.35 ppm. In addition, inter-element ratios, especially of those redox-sensitive elements, indicated the presence of both oxic and anoxic conditions during the sedimentation process in both columns. Thus, these findings point to a complexity in the depositional conditions of the sediments, which has significant implications for the understanding of the geological and environmental processes involved in the formation of these sedimentary layers.