Geoquímica de las arcillas de la Sima del Vapor
- B. Del Moral 1
- R. Pérez-López 1
- M.P. Mata 1
- J. F. Mediato 1
- E. Bellido 1
- M.R. Castillo-Carrión 1
- E. Ugarte-Manzanares 1
- M.T. Andrés-Álvez 1
- J. López-Hernando 1
- C. Pérez-Garrido 1
- 1 IGME
ISSN: 1576-5172
Year of publication: 2021
Issue Title: X Congreso Geológico de España
Issue: 18
Pages: 360
Type: Article
More publications in: Geotemas (Madrid)
Abstract
Vapor cave is a hypogenic cavity with a high radon (222Rn oscillating between 30 and 70 kBq/m3.) concentration (Pérez-López et al., 2016). The geochemistry of clays and carbonate veins have been analysed by XRF spectrometry (ZETIUM, PANalyti- cal), AAS (Varian FS-220) and mass spectrometry ICP-MS (Agilent 7500ce). Results from clays located at -20 m depth show 675 μg/g P2O5, Zn 562 μg/g and As (454 μg/g). The uranium concentration ranges between (2.24–5.7) μg/g and thorium ran- ges between (9.85–11.8) μg/g. These values are low for explaining the high radon (222 Rn) inside the cave. The geochemistry of the embedded rock in the cave, a Tortonian conglomerate of polygenic clasts of schist and carbonates, and the Triassic black carbonates of the basement, were obtained by using a handle XRF Olympus Delta PRO. Conglomerate shows a high percentage of silicon (11.5%), and remarkable values of P, Zn, and As.