A Deep Alteration and Oxidation Profile in a Shallow Clay Aquitard: Example of the Tégulines Clay, East Paris Basin, France

Figure 8

Chloride and sulfate concentrations of the AUB1010 borehole as a function of depth based on anion leaching data and directly measured on pore waters extracted by squeezing. Different symbols are used for data obtained on different boreholes. N2L indicates data obtained by leaching on samples preserved in liquid nitrogen, SQZ indicates data obtained on pore waters extracted by SQZ, the others correspond to data obtained by leaching on samples conditioned in aluminum bag.