|Lima, A.L., Hubeny, J.B., Reddy, C.M. King, J.W., Hughen, K.A., and Eglinton, T.I., High-resolution historical records from Pettaquamscutt River basin sediments. 1. Chronology and record of 137Cs released by the Chernobyl accident., Geochemica Cosmochimica Acta, 2005; v69, 1803-1812.|
Cesium-137 derived from the explosion of the Chernobyl reactor in 1986 is preserved in anoxic sediments from a coastal environment in southern Rhode Island. Although the radioactive plume was detected in surface air samples at several locations in the United States, this is the first known record of a Chernobyl 137Cs peak in sediments from North America. The inventory of Chernobyl 137Cs that was preserved in the Pettaquamscutt River is small compared to European counterparts and should only be detectable for the next 15-20 yr. However, the presence of two 137Cs peaks (1963 and 1987) identifies a well-dated segment of the sediment column that could be exploited in understanding the decompn. and preservation of terrestrial and aquatic org. matter. Different methods for calcg. the 210Pb chronol. were also evaluated in this study and checked against independent varve counting. The end result is a detailed chronol. of a site well suited for reconstruction of historical records of environmental change.