Fondos geoquímicos de elementos traza en los suelos agrícolas de la Cuenca del Guadalquivir. Evaluación de las anomalías

  1. E. Galán 1
  2. I. González 1
  3. A. Romero 1
  4. P. Aparicio 1
  5. J.C. Fernández-Caliani 2
  1. 1 Universidad de Sevilla

    Universidad de Sevilla

    Sevilla, España


  2. 2 Universidad de Huelva

    Universidad de Huelva

    Huelva, España


Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2012

Issue Title: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Issue: 13

Pages: 1411-1414

Type: Article

More publications in: Geotemas (Madrid)


This work is focused on the study of geochemical baselines of trace elements in soils developed on the Guadalquivir Basin (Spain). A total of 182 surface samples (0-20 cm) and 154 sub-surface samples (20-40 cm) were collected in selected sites at random. The baseline was calculated through the LMS (least median square) algorithm for As, Co, Cr, Cu, Ni, Pb y Zn (6, 9, 66, 24, 30, 17 y 56 mg/kg, respectively, in surface samples). The baseline of As and Pb was similar to that found in soils of the Tajo Basin in the Madrid Community, but the other elements showed higher baseline values. The 90th percentile (P90) was lower than that found in soils of the Andalusian Community at a global scale, but it surpassed the baseline in soils of Madrid Basin. Most of geochemical anomalies do not surpassed the reference values proposed for Andalusia nor other countries, except some cases which could be caused by local contamination events. Other anomalies surpassing the P90 were related with diffuse pollution associated to agricultural crops such as cereals, sunflower and cotton (Co, Cr, Ni and Zn) and olive (Cu). Arsenic and Pb did not show relation with any crop.