| 加拿大阿萨巴斯卡地区Mildred泥炭柱脂类化合物的组成特征 |
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| 引用本文： | 何大双,黄海平,侯读杰,张鹏辉.加拿大阿萨巴斯卡地区Mildred泥炭柱脂类化合物的组成特征[J].现代地质,2018,32(5):938. |
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| 作者姓名： | 何大双 黄海平 侯读杰 张鹏辉 |
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| 作者单位： | (1中国地质科学院 地球物理地球化学勘查研究所，河北 廊坊065000；2中国地质大学(北京) 能源学院, 北京100083；
3卡尔加里大学 地球科学学院，艾伯塔省 卡尔加里T2N 1N4) |
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| 基金项目： | 中国地质科学院地球物理地球化学勘查研究所中央财政科研项目结余资金项目资助(JY201705)。 |
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| 摘 要： | 利用气相色谱-质谱联用仪(GC-MS)系统地分析了阿萨巴斯卡地区Mildred泥炭柱37个样品的脂类化合物，研究了它们的组成特征及可能来源。结果表明，样品中检出的正构烷烃、正烷酮、正烷醛、正烷醇、脂肪酸和脂肪酸甲酯均由高碳数化合物构成，并具明显的奇碳或偶碳优势，GC-MS质量色谱图中甾类和萜类极性化合物呈现显著的高峰。根据泥炭分子地球化学分析，Mildred泥炭柱沉积有机质主要来源于原地堆积的高等植物，苔藓类、水生植物对泥炭有机质也有一定程度的贡献，其中松柏、杜鹃花科等木本植物、莎草科草本植物以及泥炭藓类是主要的成炭植物。萜类和甾类极性化合物的分布存在明显差异，萜类化合物主要集中于剖面的上部，其形成与泥炭藓类植物存在联系；甾类化合物来源不具专属性，多与高等植物的输入有关，也可能是受微生物的改造作用而形成。
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| 关 键 词： | 泥炭 脂类化合物 物源 甾类 萜类 |
Composition of Lipid Compounds in the Peat Deposit in Mildred
Bog from the Athabasca Region,Canada |
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| HE Dashuang,HUANG Haiping,HOU Dujie,ZHANG Penghui.Composition of Lipid Compounds in the Peat Deposit in Mildred
Bog from the Athabasca Region,Canada[J].Geoscience——Journal of Graduate School,China University of Geosciences,2018,32(5):938. |
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| Authors: | HE Dashuang HUANG Haiping HOU Dujie ZHANG Penghui |
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| Institution: | (1Institute of Geophysical and Geochemical Exploration, CAGS, Langfang, Hebei065000,China;
2School of Energy Resources, China University of Geosciences, Beijing100083, China;
3Department of Geoscience, University of Calgary, Calgary, AlbertaT2N 1N4, Canada) |
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| Abstract: | A total of 37 peat samples from Mildred bog in the Athabasca Region, Canada, were analyzed with GC-MS to reveal the compositional characteristics and origins of peat lipids. The results show that long chain components predominate in the n alkanes, n alkan 2 ones, n alkanals, n alkanols, n fatty acids and fatty acid methyl esters, with strong odd or even carbon predominance. Polar compounds of steroids and terpenoids are also present in relatively high abundances. According to molecular geochemistry of the peat samples, the organic matter in Mildred peat profile was mainly derived from the in situ vascular plants, and also from Sphagnum and aquatic plants. Woody plants of conifer, woody debris and Ericaceae, herbaceous plants of Cyperaceous, and Sphagnum are the main peat forming plants. Among polar compounds, γ lactone is considered to be a self oxidation product of tocopherols. A series of sesquiterpene, pentacyclic triterpenoid ketones, pentacyclic triterpenoid alcohols and pentacyclic triterpenes are abundant in the top interval,and their formation are associated with Sphagnum or higher plants. Most steroids are not origin specific, and the distributions of C28, C29 and C30 steroids are assigned to a higher plant source. γ Sitosterol, campesterol and stigmastan 3,5,22 triene are effective biomarkers for terrigenous higher plants. |
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| Keywords: | peat lipids material source steroid terpenoid |
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