日本海溝
In 1980, lipids samples were taken via sediment cores located on both the landward and distal sides of the Japan Trench during six sections of the Deep Sea Drilling Project's transect. They were analyzed using gas chromatography and computerized-gas chromatography-mass spectrometric data. Samples were identified to contain many components such as aliphatic and aromatic hydrocarbons, ketones, alcohols, acids and other poly functional components. These components are considered as indicators for terrestrial, marine (non-bacterial), and bacterial inputs within the sediment of the Japan Trench.