Veiga-Pires, C.Ghaleb, BassamHélie, Jean-FrançoisMoura, DelmindaLuis, JoaquimHillaire-Marcel, C.2013-12-112013-12-112011Veiga-Pires, Cristina Carvalho; Ghaleb, Bassam; Hélie, Jean-François; Moura, Delminda; Luis, Joaquim; Hillaire-Marcel, Claude. A first Last Glacial Maximum stalagmite record from southern Portugal, Trabalho apresentado em INQUA 2011, In INQUA2011, Bern, Swizerland, 2011.AUT: CVP01371; DMO00293; JLU00339;http://hdl.handle.net/10400.1/3236A newly launched research program permitted the sampling of speleothem deposits in the Algarve area (Southern Portugal). Unfortunately, this stalagmite yielded very small amounts of U (~ 20 ppb), making the setting of a U-series chronology difficult due to both the relative importance of a detrital contaminating fraction and the lack of precision on overall 230Th measurements. Nevertheless, based on the top and most recent sample, we extracted a first order estimate for the 230Th/232Th ratio of the contaminating fraction and for its 234U/232Th and 238U/232Th ratios as well, assuming a secular equilibrium between 234U and 238U in this fraction.engother2013-12-06