作者单位: | [1]DepartmentofGeologyFederalUniversityofPernambucoC.P.7852,Recife,PE,50670-000BRAZIL [2]InstitutdeRecherchepourleDéveloppement(IRD)Brasilia,D.F.,70,000BRAZIL [3]StableIsotopeLaboratory(LABISE)DepartmentofGeologyFederalUniversityofPernambucoC.P.7852.Recife,PE,50670-000BRAZIL |