Lead-210 Geochronology and trace Metal Geochemistry of Sediment Cores from lake Overstreet and Upper Lake Lafayeete, Leon County, Florida

摘要

Sedimentation rates and concentrations of major, trace, and rare earth elements in sediment cores from lake Overstreet and Upper Lake Lafayette in Leon County, Florida were investigated. The constant Initial concentration method of ~210Pb dating was used to derive ac- Cumulation rates of 6.94 mm/yr for the Lake Overstreet core an 5.58 mm/yr for the Upper Lake lafayette core. Historical profiles of Upper Lake Lafayette for Pb, Zn, V, Cr, Ni, U, Th, and Sc showed two maximum enrichments during 1929 and 1997.