碱式水解法提取红土分子化石: 以安徽宣城更新世网纹红土为例

李雪艳; 顾延生; 黄咸雨; 邱艳; 谢树成; 黄俊华

Volume 34 Issue 4

Jul. 2009

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Article Navigation > Earth Science > 2009 > 34(4): 623-628

LI Xue-yan, GU Yan-sheng, HUANG Xian-yu, QIU Yan, XIE Shu-cheng, HUANG Jun-hua, 2009. An Optimized Alkaline Hydrolysis Method to Extract Lipid Biomarkers from Pleistocene Vermicular Red Paleosols: An Example from Xuancheng, Anhui Province. Earth Science, 34(4): 623-628.

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An Optimized Alkaline Hydrolysis Method to Extract Lipid Biomarkers from Pleistocene Vermicular Red Paleosols: An Example from Xuancheng, Anhui Province

1.
Key Laboratory o f Geobiology and Environmental Geology o f the Ministry o f E ducation, China University o f Geosciences, Wuhan 430074, China
2.
Institute o f E colog y an d Environment, China University o f Geosciences, Wuhan 430074, Ch ina

Received Date: 2008-08-26
Publish Date: 2009-07-25

Abstract

Abstract

Variety of molecular fossils in red paleosols can provide direct evidence for paleoecological origin of red paleosols, but the popularization and application of the traditional Soxhlet extraction are limited by low content of molecular fossils in vermicular red paleosols.The alkaline hydrolytic method is tentatively employed to extract lipids from Pleistocene vermicular red paleosols in Xuancheng, Anhui Province.Relatively high content and variety of organics have been detected in two samples with weight of 25 g, respectively.The effect of pollution reducing is also obvious in contrast to Soxhlet extraction, which will be potential for the research on some geological sediment with low content of organic matter (such as red paleosols).A new kind of lipid biomarker named as dicarboxyl acids is firstly found in red paleosols due to alkaline hydrolytic method.In addition, other compounds extracted by traditional Soxhlet extraction such as n-alkanes, fatty acids, n-alkanols are also detected.The occurrence of dicarboxyl acids has put new insight into understanding that red paleosols is possibly developed under excessively humid condition.Distribution pattern of molecular fossils in testing samples demonstrates that the organics of red paleosols mainly originate from microbe and shows that the formation of red paleosols is affected by microbial activities with lots of oganic matter from lower bacteria and algae.The results of our preliminary studying have provided new evidence for the research on the formation environment of red paleosols.
- Pleistocene,
- vermicular red paleosols,
- alkaline hydrolysis,
- molecular fossils,
- lipids,
- molecular biology.

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References(35)

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An Optimized Alkaline Hydrolysis Method to Extract Lipid Biomarkers from Pleistocene Vermicular Red Paleosols: An Example from Xuancheng, Anhui Province

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