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地质学报  2005 

甘肃侏罗纪植物化石Ginkgohuttonii角质层地球化学特征

, PP. 289-294

Keywords: 植物化石角质层,有机地球化学,生物标志物,侏罗纪,甘肃

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Abstract:

对甘肃民和盆地侏罗纪植物化石Ginkgohuttonii(Sternb.)Heer的角质层与现生银杏Ginkgobiloba的角质层进行了地球化学特征对比分析,结果表明植物化石角质层有机物特征符合石油形成中沥青的演化特点。通过有机物组分含量分析,它们相当于中国中、新生代油源岩有机质类型中的腐泥型―腐殖腐泥型。对烃组分三角图进行投点,落入II型干酪根范围内。通过有机质中的一些指标分析,发现Ginkgohuttonii的角质层处于低成熟阶段,与煤中显微组分角质体的成烃模式基本一致。另外,角质层的可溶有机质分布特征表明,植物化石角质层对陆相高蜡原油的形成有一定的作用,证明高等植物对蜡质有贡献。当前研究及古植物学资料表明,银杏是一种有利于煤成油的植物。

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