Thermal and spectral characterization of anaerobic thermal behavior patterns in a lacustrine sediment core
Thermal and spectral characterization of anaerobic thermal behavior patterns in a lacustrine sediment core
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湖泊沉积物岩心厌氧热行为模式的热和光谱表征
DOI：
10.1007/s11356-016-7215-y
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发表时间：
2016-07
影响因子：
5.8
通讯作者：
Bai Yingchen
中科院分区：
文献类型：
--
作者：
Guo Fei;Mu Yunsong;Chen Cheng;Liao Haiqing;Bai Yingchen
沉积有机质热演化是陆相油气形成的重要机制。提出了一种估算湖泊沉积物岩心垂直热演化趋势的新方法。从博斯滕湖（Lake Bosten）回收的60厘米岩心中提取了20个沉积物样品，在n2气氛下以10°C min - 1的速率加热到600°C。采用差示扫描量热法（DSC）和热重法（TGA）对沉积物进行了表征，并用总有机碳（TOC）、x射线衍射和137cs同位素定年技术对样品进行了分析。在热图中观察到两个主要的厌氧热降解过程。热解结果随沉积物年龄的变化而变化，稳定碳（237.2±42.98°C）与不稳定碳（498.35±30.09°C）表现出不同的热图模式。样品失重与TOC呈显著线性相关（r= 0.972,p< 0.001）， DSC峰与TGA峰呈显著线性相关（r= 0.963,p< 0.001）。综上所述，湖相沉积物岩心中活性有机碳和顽固性有机碳的热稳定性随着年龄的增长而逐渐增加。这些结果证实了在惰性气体中运行的先进热技术（DSC和TGA）是表征沉积物有机碳厌氧热行为的潜在定量方法。
The thermal evolution of sedimentary organic matter is a significant mechanism in continental oil and gas formation. This study presents a new method to estimate vertical thermal evolution trends in a lake sediment core. Twenty sediment samples from a 60-cm core recovered from Lake Bosten were heated to 600 °C at a rate of 10 °C min−1under a N2atmosphere. The sediments were characterized by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), and then, the samples were analyzed with total organic carbon (TOC) analyses, X-ray diffraction, and137Cs isotopic dating techniques. Two main anaerobic thermal degradation processes were observed in the thermograms. The pyrolysis results showed variations with sediment age, with labile carbon (237.2 ± 42.98 °C) manifesting different thermogram patterns than recalcitrant carbon (498.35 ± 30.09 °C). There was a significant linear correlation between sample weight loss and TOC (r= 0.972,p< 0.001), as well as between the DSC and TGA peaks (r= 0.963,p< 0.001). As a conclusion, the thermal stability of both labile organic carbon and recalcitrant organic carbon in lacustrine sediment core increased gradually with age. These results confirm that advanced thermal techniques (DSC and TGA) operated in inert gas are potential quantitative methods to characterize the anaerobic thermal behavior of sediment organic carbon.
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影响因子：
3.5
作者：
Melis Pietro;C. Paola
通讯作者：
Melis Pietro;C. Paola
影响因子：
3.5
作者：
L. Snowdon;T. Powell
通讯作者：
L. Snowdon;T. Powell
影响因子：
3
作者：
Baldock, JA;Skjemstad, JO
通讯作者：
Skjemstad, JO
影响因子：
7.5
作者：
C. Zou;G. Zhai;Guangya Zhang;Hongjun Wang;Guosheng Zhang;Jianzhong Li;Zhaoming Wang;Z. Wen
通讯作者：
C. Zou;G. Zhai;Guangya Zhang;Hongjun Wang;Guosheng Zhang;Jianzhong Li;Zhaoming Wang;Z. Wen
影响因子：
8.9
作者：
Runyu Zhang;Fengchang Wu;Congqiang Liu;P. Fu;Wen Li;Li-ying Wang;Hai-qing Liao;Jian-yang Guo
通讯作者：
Runyu Zhang;Fengchang Wu;Congqiang Liu;P. Fu;Wen Li;Li-ying Wang;Hai-qing Liao;Jian-yang Guo