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本文运用数学地质理论中的马尔柯夫链分析方法,对苏皖北部地区及鲁西南地区晚元古代地层进行了初步研究。文中选择6条比较典型的剖面,分别对它们进行了转移概率、极限概率、差值阵、置换分析和熵分析等方面的计算,并对所得结果做了相应的地质解释。分析结果,从定量方面揭示出了晚元古代时期苏皖海盆基底的“波动”史及其上覆地层的主要沉积韵律类型,以及盆地内不同部位、不同时代岩性变化的主要趋势及其阶段性;并认为,在晚元古代早期苏皖海盆中很可能同时存在有南、北两个沉积中心,而并非像以往所认为的那样,只有一个沉积中心。
In this paper, the Markov chain analysis method in mathematical geology is used to study the Late Proterozoic strata in northern Jiangsu, Anhui and southwestern Shandong. In this paper, six typical sections are selected, and the calculation of transition probability, limit probability, difference matrix, permutation analysis and entropy analysis are respectively carried out and the corresponding geologic explanation is given. The results of the analysis reveal the history of the “fluctuation” of the basement of the Su-Wan basin in the Late Proterozoic and the main sedimentary rhythm types of the overlying strata, as well as the main trends and stages of lithology changes in different parts and ages in the basin It is also believed that it is quite possible that there are two south and north sedimentary centers in the early Su-Wan basin in Late Palaeozoic, rather than just one sedimentary center as previously thought.