杭州湾外泥质区柱状沉积物中木质素的分布特征及其环境指示意义
发布时间：2019-08-11 21:55
【摘要】：本文对杭州湾外泥质区3根沉积柱样中木质素的分布特征及有机物来源进行了研究,旨在揭示短时间尺度内该区域沉积环境的变化如何受到人类活动的影响。结果表明:海源有机物是该海域有机物相对主要的来源;柱状沉积物Ra7、Za6和Zb7的木质素含量Λ8(以OC归一化)分别为(1.06±0.29)×10~(-2)、(0.89±0.33)×10~(-2)、(0.99±0.20)×10~(-2)。总体来讲,受长江冲淡水影响区域木质素含量较高,且在短时间尺度内陆源有机物的贡献随着年代增加逐渐减少,而东海环流体系和人类活动是影响柱状样中有机物分布的重要因素;木质素的植被参数S/V和C/V的范围分别为0.33~1.35和0.07~0.26,两者的交叉作图说明Ra7和Za6中木质素的母源植被以被子植物草本组织为主,Zb7则是被子植物草本组织和裸子植物草本组织的混合;降解参数Ad/Al和P/(V+S)分别在0.30~0.60和0.39~0.63之间,揭示沉积柱中的木质素经历了中等程度的氧化和去甲基/去甲氧基降解。
[Abstract]:In this paper, the distribution characteristics of lignin and the source of organic matter in three sedimentary column samples from the muddy area outside Hangzhou Bay were studied in order to reveal how the change of sedimentary environment in this area was affected by human activities in a short time scale. The results showed that the marine organic matter was the relatively main source of organic matter in the sea area, and the lignin content of Ra7,Za6 and Zb7 in columnar sediments was (1.06 卤0.29) 脳 10 ~ (- 2), (0.89 卤0.33) 脳 10 ~ (- 2), (0.99) 脳 10 ~ (- 2) 脳 10 ~ (- 2), respectively. Generally speaking, the lignin content in the area affected by fresh water from the Yangtze River is high, and the contribution of terrestrial organic matter decreases gradually with the increase of age in a short time scale, and the circulation system and human activities in the East China Sea are important factors affecting the distribution of organic matter in columnar samples. The vegetation parameters S 鈮，
本文编号：2525542
[Abstract]:In this paper, the distribution characteristics of lignin and the source of organic matter in three sedimentary column samples from the muddy area outside Hangzhou Bay were studied in order to reveal how the change of sedimentary environment in this area was affected by human activities in a short time scale. The results showed that the marine organic matter was the relatively main source of organic matter in the sea area, and the lignin content of Ra7,Za6 and Zb7 in columnar sediments was (1.06 卤0.29) 脳 10 ~ (- 2), (0.89 卤0.33) 脳 10 ~ (- 2), (0.99) 脳 10 ~ (- 2) 脳 10 ~ (- 2), respectively. Generally speaking, the lignin content in the area affected by fresh water from the Yangtze River is high, and the contribution of terrestrial organic matter decreases gradually with the increase of age in a short time scale, and the circulation system and human activities in the East China Sea are important factors affecting the distribution of organic matter in columnar samples. The vegetation parameters S 鈮，
本文编号：2525542
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