Affiliation: | a Dip. Scienze dell'Ingegneria, Università di Modena, Via Campi 213/a - 41100, Modena, Italy b FISBAT-CNR, Via Gobetti, 101, 40129, Bologna, Italy |
Abstract: | The chemical constituents of snow from a 3 m pit sampled at a coastal Antarctic site were characterised by means of PIXE and SEM-EDAX. Oxygen isotope dating revealed that the pit spanned an 8-year period, from 1986 to 1994. Concentrations measured by PIXE ranged from less than 1 ng g−1 of H2O for Cu, and Zn to several tens of ng g−1 for Si, S and Cl. The major elements found were Si, S, Al, and Na, which contributed more than 75% of the element loading. Snow layers with elevated Cl concentration were regularly found along the pit. The mineralogy of the insoluble particles determined by SEM-EDAX analyses showed that quartz, plagioclase and clays were the prevalent minerals. The proportion of each element in the insoluble phase was comparable with that previously found in similar studies. |