Abstract
Organic matter in sinking particles from Japan Trench (JT-01) was analyzed by pyrolysis-gas chromatography/mass spectrometry with the following results: The sinking particles produced mainly aromatic hydrocarbons and nitrogen compounds with lesser amounts of phenols, furans, aliphatic hydrocarbons and aliphatic cyanides. Ratios of n-alkanes/n-alkenes and n-alkanes/indole and the production of aromatic hydrocarbons and pyridines were used to determine whether organic matter in particles is fresh or mature. It was concluded that organic matter in the sinking particles from Japan Trench is essentially composed of fresh and matured (i. e., resuspended) ones.
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