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沉积环境的氧化—还原程度和沉积速率是影响有机质保存的重要因素。以中国北部的二连盆地为研究对象探讨了氧化—还原程度和沉积速率对有机质保存的影响,发现二者均明显影响着有机质的保存:还原性越强越有利于有机质保存,沉积速率越大越有利于有机质的保存。综合分析发现有机质的保存并非受单一因素控制,氧化—还原程度偏氧化的凹陷中如果沉积速率较高,有机质快速埋藏可以缩短有机质的降解时间,从而使有机质也能得到较好的保存;沉积速率低的凹陷中如果氧化—还原程度偏还原,有机质也能得到较好的保存。有机质保存受氧化—还原程度和沉积速率的综合影响,它们在有机质的保存中起到“相互补充”的作用,单一通过氧化—还原程度或沉积速率分析有机质的保存程度是片面的。
Sedimentary environment, oxidation - reduction degree and deposition rate is an important factor affecting the conservation of organic matter. Taking Erlian basin in northern China as an example, the effects of oxidation-reduction degree and deposition rate on the preservation of organic matter were investigated. It was found that both significantly affected the preservation of organic matter: the more reducible, the more conducive to the preservation of organic matter. The larger the deposition rate Is conducive to the preservation of organic matter. The comprehensive analysis shows that the organic matter is not controlled by a single factor. If the deposition rate is high in the oxidation-reduction partial oxidation depression, the rapid burial of organic matter can shorten the degradation time of organic matter, so that the organic matter can be well preserved. The deposition rate Low depression if the oxidation - reduction degree of partial reduction, organic matter can be better preserved. Organic matter preservation is affected by the combination of oxidation-reduction and deposition rate. They play a role of “complementing each other” in the preservation of organic matter. The analysis of organic matter conservation by oxidation-reduction alone or deposition rate is unilateral.