| Distribution and Comparison of Steranes From Blue-Green Algae Under Different Simulated Conditions |
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| 作者姓名： | 吴庆余 殷实 盛国英 傅家谟 |
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| 作者单位： | Department of Biology，Nanjing University，Nanjing 210008，PRC，Department of Physics，Southeast University，Nanjing 210018，PRC，Guangzhou Branch Institute of Geochemistry，Academia Sinica，Guangzhou 510640，PRC，Guangzhou Branch Institute of Geochemistry，Academia Sinica，Guangzhou 510640，PRC |
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| 基金项目： | This work was supported by the FEYUT, SEDC, China and the Grant of China National Laboratories of Organic Geochemistry. |
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| 摘 要： | Two remarkably opposite distribution patterns of sterane series are revealed from living blue-green alga (or cyanobacterium) under different simulated conditions. The organic matter derived from hydrous-pressure pyrolysis of the blue-green alga is characterised by the predominance of C_(27) sterane over C_(29) sterane; this is coincident with traditional thought. On the contrary, the organic matter derived from artificially silicified microfossils of the blue-green alga is characterised by the predominance of C_(29) sterane over C_(27) sterane; this appears to be an unusual distribution pattern. Such kind of unusual steranedistribution also has been foundin the samples of Precambrian cherts with abundant well-preserved microfossil algae. All these imply that the special source of organisms and the medium, procedure or conditions of simulated pyrolysis may result in the different distribution patterns of sterane biomarkers.
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Distribution and Comparison of Steranes From Blue-Green Algae Under Different Simulated Conditions |
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| WU Qing-Yu.Distribution and Comparison of Steranes From Blue-Green Algae Under Different Simulated Conditions[J].Science in China(Chemistry),1993(7). |
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| Authors: | WU Qing-Yu |
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| Abstract: | Two remarkably opposite distribution patterns of sterane series are revealed from living blue-green alga (or cyanobacterium) under different simulated conditions. The organic matter derived from hydrous-pressure pyrolysis of the blue-green alga is characterised by the predominance of C_(27) sterane over C_(29) sterane; this is coincident with traditional thought. On the contrary, the organic matter derived from artificially silicified microfossils of the blue-green alga is characterised by the predominance of C_(29) sterane over C_(27) sterane; this appears to be an unusual distribution pattern. Such kind of unusual steranedistribution also has been foundin the samples of Precambrian cherts with abundant well-preserved microfossil algae. All these imply that the special source of organisms and the medium, procedure or conditions of simulated pyrolysis may result in the different distribution patterns of sterane biomarkers. |
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| Keywords: | algae distribution of staranes biomarkers pyrolysis |
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