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在山西永济地区中元古代晚期地层北大尖组产出丰富的、保存良好的有机壁化石,其中有大量带刺疑源类,在形态上和超微结构上有与沟鞭藻相似的特征(如双层壁结构和板片构造),它们可能是最早的沟鞭藻化石.为了进一步探讨这些有机壁化石的生物亲缘关系,对这些有机壁化石进行了热模拟实验并分析了其热解产物,在热模拟产物中检测到沟鞭藻的生物标志化合物——甲藻甾烷,因此证实了形态学上的推断.这一研究将沟鞭藻分子化石的记录提前了1~4亿年,可能的实体化石记录提前了7~9亿年,同时与分子钟的推测基本吻合.
In the middle Proterozoic Proterozoic strata of the Beidadu Formation in Yongji, Shanxi Province, there are abundant and well-preserved organic wall fossils, among which there are a large number of spiny source rocks with similar morphological and ultrastructural features as the dinoflagellates Such as double wall structure and plate structure), which may be the earliest dinoflagellate fossils.In order to further explore the biological relationship between these organic fossils, thermal simulation of these organic wall fossils and analysis of their pyrolysis products , The dinoflagellate biomarker compound dinoflagellate was detected in the thermal simulation product, thus confirming the morphological inference. This study advanced the record of dinoflagellate molecular fossils 1 to 400 million years earlier, Possible physical fossil record advance 7 to 900 million years, at the same time with the molecular clock conjecture basically consistent.