Trace and rare earth element analyses of sediment samples from the San Francisco Bay coastal system

Thirty three major, minor, trace and rare earth elements were analyzed by SGS Minerals Services. Each digested sample was fused with lithium metaborate, dissolved using dilute HNO3, and analyzed by high-resolution inductively-coupled plasma mass spectrometry (HR-ICP-MS) Perkin Elmer Elan 6100. Precision with known calibration materials was within 2-sigma-error of literature and recommended values. Procedural duplicates and replicate measurements show excellent agreement, with relative standard deviations (RSD) less than 5%. REE values were chondrite-normalized using values reported in Anders and Grevesse (1989). Ce and Eu anomalies were calculated using the formulas provided by Bau et al. (1996).