Depositional characteristics and trace metal abundance of sediments in an anoxic basin

Abstract

[author abstract] Radiocarbon dates, grain-size analysis, δ13C, Computerized Tomography Scans, and metal abundance profiles are used to identify sediment deposition rate, sediment source, and redox conditions in a basin cut off from deep water renewal by a sill on the western coast of Vancouver Island B.C. ...Trace metal profiles reveal a long history of anoxic conditions, but a homogenized surface sediment layer and redox sensitive profiles indicate the possibility of a recent bottom oxygenation event.