Pb and U Background Values for Campania Region Stream Sediments

Pb and U Background Values for Campania Region Stream Sediments 

The Campania region covers about 13,600 km2. Morphologically, Campania is made up, in its eastern sector, by the Apennine mountains oriented roughly NW-SE and in the west, by two coastal plains. Lithologies mostly consist of sedimentary and 

The stream sediment geochemical maps (Fig. 7.1 A and B) of Campania have been interpolated by MIDW using the GeoDAS program (Cheng, 2003). Search distance and map resolution are 3.5 and 1 km, respectively. 

Comparing geological map (Fig. 7.3) of the Campania region with Pb (Fig. 7.1 A) and U (Fig. 7.IB) MIDW interpolated maps, it can be seen that the distribution of high Pb values reflects both a lithologic and an anthropogenic control, whereas U reflects mostly a lithologic control. 

1 Potassic - ultrapotassic lavas [ Pyroclastic flows, surges, lahars J Pyroclastic fall deposits 1 Volcano-sedimentary deposits j Limestones I Carbonate deposits j Alluvial conglomerates J Sandstones and calcarenites 

---