Statistical approach to identify variables predicting sulphide clay occurrence in southern Finland

Abstract Acid sulphate soil and sulphide-bearing sediments cause various challenges in construction projects land use planning, as well harmful environmental effects. Fine-grained sulphide were mainly formed coastal areas during the Litorina Sea water phase at approximately 7000 BP capital region of Finland, but not all these contain clay. In this study, material property variables related to depositional conditions clay selected for statistical analyses find their association with occurrence sulphide. The datasets consisted investigations by City Espoo, Helsinki, Geological Survey Finland. Statistically significant associations found study area between enumerative (i.e., sediment organic content, total depth, topographic class phase, depth) phase. Locations where is especially likely occur consist organic-rich (≥ 2%) thick 15 m) deposits a topographically narrow depression deep 30 m), or there moderate depth (3–5 local shallow (10–20 m). best individual predictor was be and, together very accurately predicted addition, good current elevation, can used predict occurrence.