Iron and Trace Metals in Microbial Mats and Underlying Sediments: Results From Guerrero Negro Saltern, Baja California Sur, Mexico
  • 【DOI】

    10.1007/s10498-011-9126-3

  • 【摘要】

    Total trace metals (Cd, Co, Cu, Fe, Mn, Ni, Pb, Zn), Al, and pyrite- and reactive-associated metals were measured for the first time in a microbial mat and its underlying anoxic-sulfidic s... 展开>>Total trace metals (Cd, Co, Cu, Fe, Mn, Ni, Pb, Zn), Al, and pyrite- and reactive-associated metals were measured for the first time in a microbial mat and its underlying anoxic-sulfidic sediment collected in the saltern of Guerrero Negro (GN), Baja California Sur, Mexico. It is postulated that the formation of acid volatile sulfide (AVS) and pyrite in the area of GN could be limited by the availability of reactive Fe, as suggested by its limited abundance (mat and sediment combined average value of only 19?±?10?μmol?g?1; n?=?22) as well as the low pyrite (0.89–7.9?μmol?g?1) and AVS (0.19–21?μmol?g?1) concentrations (for anoxic-sulfidic sediments), intermediate degrees of pyritization (12–50%), high degrees of sulfidization (14–100%), generally low degrees of trace metal pyritization, and slight impoverishment in total Fe. This is a surprising result considering the large potential 收起<<

  • 【作者】

  • 【刊期】

    Aquatic Geochemistry 2011年4-5期

  • 【语种】

    eng