The chemlcal and isotopic features of salt groundwaters in the Salento coastal karstic aquifer (Apulia, Southern Italy) reveal that they are very different from modem seawater. Chemical data allow identifying the role of water-rock interaction (Ca-Mg due to dolomitization, Na-Ca or Mg base exchange,SO4 reduction, solution of evaporite salts) in the modification of the chemical caracteristics of original seawater. 87Sr/86Sr isotope ratios and Sr indicate that salt water are very ancient and, given the structural features of this aquifer and the paleogeography of the region, they probably date back to the Flandrian transgression. Now findings in a thermal area overlooking the Adriatic Sea suggest new scenarios for the role of Ca-Cl2 brines,until now unknown.
Salt ground waters in the Salento karstic coastal aquifer (Apulia, Southern Italy) / Fidelibus, M. D.; Calò, G.; Tinelli, R.; Tulipano, L.. - STAMPA. - (2011), pp. 407-415. [10.1007/978-3-642-19902-8_48]
Salt ground waters in the Salento karstic coastal aquifer (Apulia, Southern Italy)
M. D. Fidelibus;G. Calò;R. Tinelli;
2011-01-01
Abstract
The chemlcal and isotopic features of salt groundwaters in the Salento coastal karstic aquifer (Apulia, Southern Italy) reveal that they are very different from modem seawater. Chemical data allow identifying the role of water-rock interaction (Ca-Mg due to dolomitization, Na-Ca or Mg base exchange,SO4 reduction, solution of evaporite salts) in the modification of the chemical caracteristics of original seawater. 87Sr/86Sr isotope ratios and Sr indicate that salt water are very ancient and, given the structural features of this aquifer and the paleogeography of the region, they probably date back to the Flandrian transgression. Now findings in a thermal area overlooking the Adriatic Sea suggest new scenarios for the role of Ca-Cl2 brines,until now unknown.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
