Sr-ISOTOPE RATIOS OF A SOIL PROFILE (BADLANDS) NEAR RADICOFANI (SOUTHERN TUSCANY)

Authors

  • Francesca Castorina IGAG-CNR, c/o Dipart. di Scienze della Terra, Università “La Sapienza”, Roma
  • Mariachiara Galiano Dipartimento di Scienze della Terra, Università “La Sapienza”, Roma
  • Umberto Masi Dipartimento di Scienze della Terra, Università “La Sapienza”, Roma

DOI:

https://doi.org/10.6092/issn.2281-4485/3802

Keywords:

Sr isotopes, Sr/Ca ratios, soil, acetate extraits, Radicofani

Abstract

The Sr/Ca ratios and Sr-isotope ratios of bulk samples and acetate extracts from a soil profile developed on Pliocene marine clays near Radicofani, in southern Tuscany, were determined. The uniform Sr/Ca ratios in the soil indicated a uniform distribution of the two elements throughout the profile. In contrast, the lower Sr/Ca ratios of acetate extracts from the upper horizons of the soil suggest preferential removal of Sr relative to Ca, perhaps by the plants. These latter seem to accumulate more Sr than Ca during their lifetime. The δ87Sr of acetate extracts suggests that bulk Sr is provided by the calcite of the Mesozoic-Cenozoic sedimentary formations of southern Tuscany. A minor source of Sr, although subordinate, is represented by clastic albite. A grass sample growing on the soil contained the Sr uptaken from both sources.

References

CASTORINA F., MASI U. (2007) Use of Sr isotopes to constrain Sr (and Ca) sources in a Mediterranean soil profile near Muravera (SE Sardinia). Acta Vulcanologia 19: 103-108.

CASTORINA F., MASI U. (2008) The Sr-isotope composition of soils: a case study from Muravera (SE Sardinia, Italy). Journal of Geochemical Exploration 96: 86-93.

CASTORINA F., MASI U. (2009) Sr isotopic evidence for studying the salinization of soils: an example from the san Vitale Pinewood (Ravenna). EQA Environmental quality 3: 143-147.

CICCACCI S., GALIANO M., ROMA M.A., SALVATORE M.C. (2008) Morphological analysis and erosion rate evaluation in badlands of Radicofani area. Catena 74: 87-97.

GALIANO M. (2007) Morfodinamica e variazioni morfologiche recenti in aree a calanchi dell’Italia centrale. Dottorato di ricerca in Scienze della Terra XXI ciclo, Università di Roma “La Sapienza”, 305 pg.

RICHTER F.M., DE PAOLO D.J.(1987) Numerical models of diagenesis: Application to DSDP 590B and the Neogene Sr isotopic evolution of seawater: Earth Planetary Science Letters, 83: 27-38.

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Published

2010-12-19

How to Cite

Castorina, F., Galiano, M., & Masi, U. (2010). Sr-ISOTOPE RATIOS OF A SOIL PROFILE (BADLANDS) NEAR RADICOFANI (SOUTHERN TUSCANY). EQA - International Journal of Environmental Quality, 5(5), 7–14. https://doi.org/10.6092/issn.2281-4485/3802

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