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Seasonal patterns of sedimentary hydrocarbons in the raritan bay‐lower new york bay

1983; Wiley; Volume: 2; Issue: 1 Linguagem: Inglês

10.1002/etc.5620020104

1552-8618

Dennis M. Stainken, H. Gray Multer, June E. Mirecki,

Geological Studies and Exploration

Abstract Surface sediments from 24 stations in the Raritan Bay-lower New York Bay were analyzed seasonally for size-grade distributions, percent volatiles and extractable hydrocarbons. Seasonal means of size-grade fractions were not statistically different, although much inter- and intrastation variability occurred. Greater silt-clay content tended to occur at the head of the bay (especially in winter) and decreased down the bay. During fall and winter, the occurrence of silt-clay fractions tended to increase throughout the bay. Extractable hydrocarbons exhibited significant seasonal differences (p < 0.05). Extractable hydrocarbon ranges were 1–1,273 μg/g dry sediment, with seasonal means of 160–327 μg/g dry sediment, depending on the bay region. Hydrocarbon content and percent volatiles generally increased with increased silt-clay content. Best correlations of hydrocarbons with silt-clay occurred in summer and fall. Throughout the seasons, hydrocarbon material appeared to move down the bay, with lowest values in fall-winter and the highest in spring-summer.