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中文摘要：
山东半岛东北岸近海是黄河入海泥沙向外输送的主要通道和重要沉淀区，探讨该海域沉积物中木质素的分布特征和有机物来源，对理解其中记录的环境演变信息具有重要意义。本文通过分析该海域表层沉积物中总有机碳（TOC）、总氮（TN）、碳稳定同位素（δ18C），并结合木质素及其特征参数，研究了其中有机物的来源，以及木质素的分布、植被来源和降解程度。结果表明，海源有机物是山东半岛东北岸近海表层沉积物中有机物的主要来源，有机物的分布特征受河流输入和海洋环流的共同影响。被子植物草本和木本组织是木质素的主要植被来源，酸醛比值表明表层沉积物中木质素都经历了较高程度的降解。
英文摘要：
Offshore of north the Y eastern Shandong Peninsula is a major pathway for material transportation ellow Sea and an important area for sediment deposition. To study the dis tribution characteristics of tignin and organic sources in this area is significant to understand the record of environmental evolution along Yellow River and adjacent regions. In this paper, we analyzed total organic carbon （TOC）, total nitrogen （TN）, stable carbon isotope （δ18C） and lignin in surface sedi ments of the studied area. The distribution pattern and the degradation degree of lignin in this area were examined; and the sources of organic matter and vegetation type were inferred based on these da ta. The results showed that marine derived organic matter is the major source of organic matter in sur- face sediments offshore of north eastern Shandong Peninsula; the distribution pattern of organic matter is controlled by river inputs and oceanic circulation; and nonwoody and woody tissues of angiosperms are the main source of lignin. Acid to aldehyde ratio of vanillyl phenols indicated that lignin in surface sediments of this area had been highly degraded.
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