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Ricostruzione paleoclimatica attraverso l'analisi
di uno speleotema nella Sardegna centro-orientale:
risultati preliminari
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Abstract
This paper, carried out in the framework of a local project 60% «Pleistocene-Holocene palaeoclimate and palaeogeography reconstructions based on marine and continental deposits of Sardinia» (Resp. Prof. Sandro De Muro) and within a series of researches involving several bodies (Archaeological Superintendence of NU/SS, Universities of Parma and Cagliari) and caving associations (Gruppo Speleo Ambientale
Sassari, Gruppo Speleo-Archeologico Giovanni Spano of Cagliari, Unione
Speleologica Cagliaritana and Gruppo Archeo Speleo Ambientale Urzulei), reports the
first results of a palaeo-climate study carried out on a stalagmite sampled in the Su Palu
cave, Codula Ilune, Urzulei (Central-East Sardinia). This stalagmite has been subjected
to radiometric U/Th dating and stable isotope δ180 and δ 13C analysis. These isotopic
data based on 139 samples showed a general increase in stable isotope ratios that would
indicate a growth of the concretion in a period of global warming (Upper Pleistocene-
Holocene?). The chronological setting by means of U/Th datings, unfortunately, did not
allow to define the exact timeframe because of the presence of detrital Thorium. C14
analysis are under way to try to obtain information on the time during which the
stalagmite growed