【摘要】：本文對杭州灣外泥質(zhì)區(qū)3根沉積柱樣中木質(zhì)素的分布特征及有機物來源進行了研究,旨在揭示短時間尺度內(nèi)該區(qū)域沉積環(huán)境的變化如何受到人類活動的影響。結(jié)果表明:海源有機物是該海域有機物相對主要的來源;柱狀沉積物Ra7、Za6和Zb7的木質(zhì)素含量Λ8(以O(shè)C歸一化)分別為(1.06±0.29)×10~(-2)、(0.89±0.33)×10~(-2)、(0.99±0.20)×10~(-2)。總體來講,受長江沖淡水影響區(qū)域木質(zhì)素含量較高,且在短時間尺度內(nèi)陸源有機物的貢獻隨著年代增加逐漸減少,而東海環(huán)流體系和人類活動是影響柱狀樣中有機物分布的重要因素;木質(zhì)素的植被參數(shù)S/V和C/V的范圍分別為0.33~1.35和0.07~0.26,兩者的交叉作圖說明Ra7和Za6中木質(zhì)素的母源植被以被子植物草本組織為主,Zb7則是被子植物草本組織和裸子植物草本組織的混合;降解參數(shù)Ad/Al和P/(V+S)分別在0.30~0.60和0.39~0.63之間,揭示沉積柱中的木質(zhì)素經(jīng)歷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 鹵0.29) 脳 10 ~ (- 2), (0.89 鹵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，

本文編號：2525542