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一、问题的提出 燧石岩是主要或全部由隐晶或微晶石英组成的,化学成分接近纯二氧化硅,它在距今6.3亿年以前的前寒武系沉积岩系中有着广泛的分布。 近年来,不断在亚、非、澳、美各洲的前寒武系层状燧石岩中,发现有生命遗迹的报导,如类似菌类和藻类的球状体、丝状体、杯状体等。同时还有各种有机质、氨基酸及油气显示。因此,长期争论的层状燧石岩的成因问题,已有较多的证据偏重于有机成因的结论。这一认识也为在前寒武系沉积岩系中寻找能源提供了新的依据。
First, the issue raised Chert stone is mainly or entirely composed of cryptocrystalline or microcrystalline quartz, and its chemical composition close to pure silica, which in the pre-Cambrian sedimentary rock dating back to 630 million years ago has a wide distribution. In recent years, there have been reports of life relics found in Precambrian chert rocks in Asia, Africa, Australia and the United States, such as spheroids, filaments, goblets and the like similar to fungi and algae . At the same time there are a variety of organic matter, amino acids and oil and gas show. Therefore, there are more evidences of the origin of the layered chert rock that have long been debated, with the emphasis on organic genesis. This understanding also provides a new basis for finding energy in the Precambrian sedimentary rock series.