Moleculare composition of sediments from ODP Hole 116-717C

We describe the molecular composition of a portion of the solvent-soluble organic material (lipid extract), from three organic rich muds (samples 116-717C-22X-1, 80-86 cm, 116-717C-34X-3, 130-135 cm, and 116-717C-55X-1, 65-70 cm). These samples were taken from Hole 717C, located on the Bengal Fan at a position of 0°55.8'S and 81°23.4'E. Both the palaeoenvironmental and digenetic significance of these lipid distributions have been assessed and found to be consistent with their suspected origins, i.e., turbidites from the upper slope of the western Bay of Bengal and the Ganges-Brahmaputra delta.

本研究阐述了三份富含有机质泥样中部分溶剂可溶有机质（脂类提取物，lipid extract）的分子组成。上述样品取自位于孟加拉扇（Bengal Fan）的717C钻孔，该钻孔的地理位置为南纬0°55.8′、东经81°23.4′，具体样品编号与对应层位分别为116-717C-22X-1（80~86 cm）、116-717C-34X-3（130~135 cm）以及116-717C-55X-1（65~70 cm）。本研究已对该批脂类分布的古环境（palaeoenvironmental）与成岩（digenetic）指示意义开展评估，结果表明其与推测的成因完全一致，即这些脂类源自孟加拉湾西部上陆坡的浊积岩（turbidites）以及恒河-布拉马普特拉河三角洲。