Page 279 - Geochemistry of Oil Field Waters

1955) b rn z Third cycle (Neoluvium) Second cycle (paraeluvium) rrl from Recent Drift from sedimentary rocks is b accumulative products residual products accumulative products residual products =iJ 0 chloride-sulphate (1) solonez and (1) chloride-sulphate (1) detrital (1) z gypsum bearing (2) CaC03 (2) leached supra- (2) calcareous (2) siallitic calcareous chloride-sulphate (supra-calcareous (siallitic) and ferri- alumino- unsaturated sialli

weathering (after Chebotarev, from igneous and highly metamorphosed rocks accumulative products chloride-sulphate (1) (chiefly alluvial) (2) calcareous (chiefly colluvial and proluvial) siallitic (3) The action of carbonated atmospheric water is insufficient to replace the absorbed ions by hydrogen.

Cycles and types of products of First cycle (orthoeluvium) residual products coarse detrital (1) (2) calcareous (under vegetation cover) siallitic (3) (4) alliti~*~ (lateritic crust of weathering) acids of the kaolin type.

TABLE 8.111 Cycles of weathering: Types of products weathering of i.e., *’ *3