Integrated Geochemical Assessment of Soils and Stream Sediments to Evaluate Source-Sink Relationships and Background Variations in the Parauapebas River Basin, Eastern Amazon

This study aims to handle an integrated evaluation of soil and stream sediment geochemical data evaluate source apportionment establish threshold variations for Fe, Al, 20 selected Potentially Toxic Elements (PTE) in the Parauapebas River Basin (PB), Eastern Amazon. The set used this is from Itacaiúnas Geochemical Mapping Background Project (ItacGMBP), which collected 364 surface (0–10 cm) samples 189 sediments entire PB. <0.177 mm fraction these were analyzed 51 elements by ICP-MS ICP-AES, following aqua regia digestion. maps many revealed substantial differences between north (NPB) south (SPB) PB, mainly due geological setting. new statistically derived values NPB SPB regions compared whole reported previous studies, quality guidelines proposed Brazilian environmental agencies. natural variation background soils PB should be considered prior defining guideline values. At regional scale, local anomalies are mostly influenced predominant lithology rather than any anthropogenic impact.