微束分析在研究真菌化石和干酪根成因中的应用

APPLICATION OF ELECTRON MICROBEAM TECHNIQUE TO STUDY OF ORIGIN OF KEROGEN

笔者运用电子微束技术研究了地层中的真菌化石和干酪根,发现真菌化石与干酪根有许多相似处,而且在生油岩和干酪根中常常见有真菌化石存在.研究表明,通过真菌和其它菌类的生物化学作用,动物和植物都可以形成类脂化合物.真菌本身也可形成类脂化合物.残存的不易被溶解的有机物(包括茵类及被分解的生物残骸)富集形成干酪根.不同类型的干酪根,反映了菌类对有机体所进行的生化作用程度的不同.例如,Ⅰ型(腐泥型)干酪根反映有机体的分解最彻底,而Ⅲ型(腐殖型)干酪根表明有机体分解最不彻底.有机体被菌类分解得越完全,则类脂化合物产生得越多.生油的潜刀越大.所以,在地层中发现菌类残余物越多,干酪根的质量就越高,就越具生油潜力.

Fungi conidia fossils in lower Jurassic mudstone in Shanxi Province have been studied with electron microbeam technique. The facts that fungi conidia and mycelia are frequently seen in oil source rocks and Kerogen lead to the following conclusions. First, through biochemical processes of het-erotrophic plants such as fungi.animals.and plants can all produce lipoid in favour of the generation of oil and gas. Fungi themselves are also capable of producing lipoid. Second essentially. kerogen is an assemblage of the remains of both heterotrophic plants and decomposed organism. Various types of kerogen reflect different degrees of the biochemical process(e. g. decomposition and absorption)of fungi on organism. For instance, type I kerogen is the most completely decomposed organism and type I the least one. Third the more complete the decomposition of organism by fungi is, the more lipoid will be produced, suggesting more potentialities for oil generating.